Subjects -> CHEMISTRY (Total: 928 journals)
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INORGANIC CHEMISTRY (45 journals)

Showing 1 - 36 of 36 Journals sorted alphabetically
Acta Polymerica     Hybrid Journal   (Followers: 9)
Additives for Polymers     Full-text available via subscription   (Followers: 20)
Advances in Inorganic Chemistry     Full-text available via subscription   (Followers: 9)
Advances in Polymer Technology     Open Access   (Followers: 14)
Annual Reports Section A (Inorganic Chemistry)     Full-text available via subscription   (Followers: 5)
Bioinorganic Chemistry and Applications     Open Access   (Followers: 5)
Comments on Inorganic Chemistry: A Journal of Critical Discussion of the Current Literature     Hybrid Journal   (Followers: 1)
Communication in Inorganic Synthesis     Open Access  
European Journal of Inorganic Chemistry     Hybrid Journal   (Followers: 10)
European Polymer Journal     Hybrid Journal   (Followers: 42)
High Performance Polymers     Hybrid Journal   (Followers: 1)
Indian Journal of Chemistry - Section A     Open Access   (Followers: 9)
Inorganic and Nano-Metal Chemistry     Hybrid Journal   (Followers: 1)
Inorganic Chemistry     Hybrid Journal   (Followers: 31)
Inorganic Chemistry Communications     Hybrid Journal   (Followers: 13)
Inorganic Chemistry Frontiers     Hybrid Journal   (Followers: 4)
Inorganic Materials     Hybrid Journal   (Followers: 5)
Inorganic Materials: Applied Research     Hybrid Journal   (Followers: 1)
Inorganica Chimica Acta     Hybrid Journal   (Followers: 6)
Inorganics     Open Access   (Followers: 1)
International Journal of Bio-Inorganic Hybrid Nanomaterials     Open Access   (Followers: 2)
International Journal of Inorganic Chemistry     Open Access   (Followers: 3)
JBIC Journal of Biological Inorganic Chemistry     Hybrid Journal   (Followers: 2)
Journal of Inorganic and Organometallic Polymers and Materials     Hybrid Journal   (Followers: 8)
Journal of Inorganic Biochemistry     Hybrid Journal   (Followers: 4)
Journal of Inorganic Chemistry     Open Access   (Followers: 3)
Journal of Polymers and the Environment     Hybrid Journal   (Followers: 1)
Journal of Progressive Research in Chemistry     Open Access  
Journal of Separation Science     Hybrid Journal   (Followers: 10)
Materials Today Chemistry     Hybrid Journal   (Followers: 2)
Open Journal of Inorganic Chemistry     Open Access   (Followers: 1)
Polymer Bulletin     Hybrid Journal   (Followers: 6)
Polymer Composites     Hybrid Journal   (Followers: 18)
Russian Journal of Inorganic Chemistry     Hybrid Journal  
Separation Science plus (SSC plus)     Hybrid Journal  
Zeitschrift für anorganische und allgemeine Chemie     Hybrid Journal   (Followers: 1)
Similar Journals
Journal Cover
Journal of Inorganic and Organometallic Polymers and Materials
Journal Prestige (SJR): 0.402
Citation Impact (citeScore): 2
Number of Followers: 8  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1574-1443 - ISSN (Online) 1574-1451
Published by Springer-Verlag Homepage  [2469 journals]
  • Antibacterial Activity and Drug Release of Ciprofloxacin Loaded PVA-nHAp
           Nanocomposite Coating on Ti-6Al-4 V

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      Abstract: Abstract Here, a new composite coating was introduced for the Ti-6Al-4 V implant, and the different properties were investigated in-vitro. For this purpose, the Hydroxyapatite nanopowder (nHAp) was synthesized, and the x-ray diffraction (XRD) pattern and field emission scanning electron microscopy (FE-SEM), energy-dispersive x-ray spectroscopy (EDX) evaluations confirmed the nHAp formation. Then Ti-6Al-4 V substrates were sandblasted, and the average surface roughness (Ra) was increased from 23.75 to 31.59 nm after sandblasting operation. Then, nHAp coating was applied on the surface by electrophoretic deposition. Ciprofloxacin (CIP), a common antibacterial drug, was loaded on some nHAp coating Ti substrates. In order to form a crack-free coating and improve biocompatibility, hydrophilicity, and controlled drug release, polyvinyl alcohol (PVA) coating was created on Ti substrates coated with CIP-nHAp. Different properties of non-coated Ti-6Al-4 V, nHAp coated Ti-6Al-4 V, and PVA-CIP coated Ti-6Al-4 V were examined. Fourier-transform infrared and XRD tests proved the presence of CIP on the substrates, and FESEM and EDX tests demonstrated the formation of a crack-free, approximately homogenous coating on all substrates. The drug release evaluation showed sustained CIP releasing with a diffusion mechanism. The antibacterial on both S. aureus and E. coli was higher for CIP-containing substrates than in other samples.
      PubDate: 2022-05-21
       
  • Composite Nanoarchitectonics of PtO Decorated Mesoporous ZrO2 for Enhanced
           Photoreduction of Hg2+ Under Visible Light

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      Abstract: Abstract Photocatalytic reduction of Hg2+ under visible light, using a unique type of photocatalyst, is widely acknowledged as a primary avenue aimed at that trend. A new nanocomposite PtO@ZrO2 comprised of mesoporous ZrO2 and PtO was synthesized using a straightforward wet chemical technique. The crystal structure of PtO@ZrO2 along with the varied compositions of the fabricated materials were successfully detected. We also demonstrated that PtO may be successfully integrated into the ZrO2 configuration. The acquired TEM images proven the spherical shape of PtO nanoparticles (NPs) and that it were equally spread throughout the ZrO2 NPs. The BET surface areas for ZrO2 and PtO@ZrO2 samples, with different weight ratios of 0.5, 1.0, 1.5 and 2.0% of PtO additives were 235, 214, 205, 200, and 199 m2/g, respectively. Additionally, the band gap energy (Eg) aimed at ZrO2 and PtO@ZrO2 samples, with different weight ratios of 0.5, 1.0, 1.5 and 2.0% of PtO additives were determined to be 2.92, 2.82, 2.73, 2.67, as well as 2.66 eV, respectively. With visible light, the PtO@ZrO2 photocatalyst were studied for their application as a potentially effective photocatalyst against Hg2+ photoreduction. The presence of PtO in the sample confirmed that the photocatalytic action was linked to the Hg reduction procedure. The maximum value of Hg2+ reduction was found for a 1.5% PtO@ZrO2 photocatalyst, showing a significant enhancement in its photocatalytic activity due to the amount of doped nanocomposite used. The recycled PtO@ZrO2 structure remain its activity even after five cycles of application while preserving its recyclability. The newly synthesized PtO@ZrO2 photocatalyst has the potential to be exploited as an environmentally benign photocatalyst for key transformation events in the environment.
      PubDate: 2022-05-21
       
  • Structural, Optical and Electrical Conductivity Studies in Polycarbazole
           and its Metal Oxide Nano Composites

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      Abstract: Abstract Polycarbazole (PCz) has been synthesized by chemical oxidation method using APS as an oxidizing agent and PCz/CuO and PCz/Fe2O3 nanocomposites by in situ polymerization method for different wt% of CuO and Fe2O3 at room temperature. XRD patterns confirmed crystalline nature of samples. FTIR indicated strong interaction between PCz and nano fillers. The morphological and optical absorption studies were carried out using SEM and UV–Vis respectively. Addition of CuO or Fe2O3 to PCz decreased its direct and indirect band gaps. However, band gap showed a small change with dopant contents up to 30%. Urbach energy decreased with the addition of dopants. But Urbach energy of the composites increased with increasing dopants content from 10 to 30%. DC conductivity of PCz and its nanocomposites has been measured by following two probe technique in the temperature range 300–423 K. The conductivity of both the nanocomposites is found to be less than the pure PCz and it is found to increase with wt% of CuO or Fe2O3 as the case may be. The activation energy has been determined by fitting Arrhenius expression to the dc conductivity data at high temperature. The activation energy of polycarbazole is determined to be less than that of the composites. In both the composites, activation energy decreased and conductivity increased with the increase of dopant content.
      PubDate: 2022-05-21
       
  • Fe[4-(3-Phenylpropyl)Pyridine]2[Fe(CN)5NO]: A 2D Coordination Polymer with
           Thermally-Induced Spin Transition and Nature of Its Asymmetric Hysteresis
           Loop

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      Abstract: The titled material crystallizes with an orthorhombic unit cell, in the P21212 space group (Nr. 18). Its crystal structure was solved and refined from powder XRD patterns. The solid framework is formed by stacked undulated sheets of inorganic nature, Fe[Fe(CN)5NO], separated by bimolecular organic pillars, [4-(3-Phenylpropyl)pyridine]2, which remain coordinated to the axial coordination sites for the iron atom. The molecules forming these pillars remain coupled through C–H⋯π and dispersive interactions between neighboring molecules. When this solid is cooled and then warmed, a reversible spin transition, from high to low spin (HS → LS), and vice versa, is observed. This transition occurs in the temperature interval of 135–165 K, with a hysteresis between them of about 30 K. That hysteresis loop appears with a pronounced asymmetry when the slopes for the HS → LS and LS → HS transitions are compared. This effect is discussed in terms of the related structural changes in the solid structure during the spin transitions. The transition was also monitored from IR and Raman spectra recorded at 80 and 300 K. Relevant information on the electronic structure for both, the LS and HS phases of this material, was derived from the corresponding XPS spectra recorded at 114 and 270 K. This contribution emphasizes the role of the nitrosyl group (NO) as an electron buffer for tuning the bonding properties of the inorganic layer at the CN 5σ orbital to make possible the observed thermally-induced SCO behavior. Graphical The thermally-induced spin transition in this solid shows an asymmetric hysteresis loop, which was ascribed to the nature of the pillar molecule.
      PubDate: 2022-05-20
       
  • Correction to: Synthesis of Co3O4 @ Organo/Polymeric Bentonite Structures
           as Environmental Photocatalysts and Antibacterial Agents for Enhanced
           Removal of Methyl Parathion and Pathogenic Bacteria

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      PubDate: 2022-05-18
       
  • CoSe2@N-Doped Graphene Nanocomposite High-Efficiency Counter Electrode for
           Dye-Sensitized Solar Cells

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      Abstract: Abstract In present study, CoSe2, and CoSe2@N-doped graphene nanocomposite has been prepared in an inert atmosphere and used as a DSSC counter electrode. The fabricated nanocomposite was characterized using analytical techniques including FTIR, TGA, XRD, Raman, XPS, and BET. The assembled DSSC obtains a photoelectric conversion efficiency (PCE) of 7.65%, which is higher than the PCE (7.19%) of the Pt electrode assembly cell under the same conditions. The promising performance of the fabricated counter electrodes may be due to the excellent surface area of the nanocomposites, the doping of heteroatoms which provide the active sites to boost the catalytic activities towards I3− reduction. These results illustrate the rational design of CoSe2@N-doped graphene nanocomposite and has great potential for replacing noble Pt for the reduction of I3– in DSSCs.
      PubDate: 2022-05-18
       
  • Sonochemically Prepared GdWNFs/CNFs Nanocomposite as an Electrode Material
           for the Electrochemical Detection of Antibiotic Drug in Water Bodies

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      Abstract: Abstract The work demonstrates the development of an electrochemical sensor for quantification of Chloramphenicol (CA) using pencil graphite electrode (PGE) modified with Gadolinium tungstate nano flakes and carbon nano fibers composite (PGE/GWNfs/CNFs). The composite was further characterized and confirmed by X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy, transmission electron microscopy analysis. The prepared GWNfs/CNFs nano composite was fabricated by drop casting method to get PGE/GWNfs/CNFs working electrode. The modified electrode is then analyzed by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and differential pulse voltammetry (DPV) methods for its electrochemical and electrocatalytic property. The electrochemical investigation of developed sensor shows enhanced activity towards electro-oxidation of CA. The DPV studies revealed high efficacy characteristics such as sensitivity in the range 0.03984 µA µM−1 cm−2, selectivity, good linear range (5–50 μM), and low detection limit (0.4 μM). The study benchmarks the use of GWNfs/CNFs as an excellent transducer material in electrochemical sensing of CA in standard samples thus, it finds an efficient potential application in the analysis of CA in environment sample analysis.
      PubDate: 2022-05-18
       
  • Solid-Phase Synthesis of Non-metal (S, N)-Doped Tin Oxide Nanopowders at
           Room Temperature and its Photodegradation Properties for Wastewater of
           Biomass Treatment

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      Abstract: Abstract Tin oxide and sulfur, nitrogen-doped tin oxide nano-powder catalysts were prepared by a solid phase reaction at room temperature, using the sodium p-toluene sulfonate (STS) surfactant as template. Theoretical calculation of the dehydration reaction energy of tin hydroxide was performed with the framework of DFT and their structures were characterized. And the UV-light degradation performance and mechanism used for the biomass wastewater were discussed, as well as, its COD and NH3-N value. The results show that the large gap of the reaction energy between intramolecular dehydration (Er = 2.81 eV) and intermolecular dehydration (Er = 5.77 eV) for tin hydroxide causes the presence of amorphous SnO2 and metastable tin hydroxide at 450 °C. The entry of S and N into the (110) crystal plane of SnO2 reduces its energy band gap width, exhibiting the photocatalytic degradation rate (98.9%) of S + N-SnO2-STS sample for the rice straw powder treatment wastewater (RSPTW) irradiated by UV-light for 8 h. The excellent degradation capacity of RSPTW mainly comes from the hydroxyl radicals (·OH) and superoxygen radicals (·O2−) produced by the rich hydroxyl on the surface of S + N-SnO2-STS due to the regulatory effect of STS and lower calcined temperature. The sewage discharge of photodegraded RSPTW complies with Chinese National Level II Standards.
      PubDate: 2022-05-17
       
  • Advances in Nanoarchitectonics of Antimicrobial Tiles and a Quest for
           Anti-SARS-CoV-2 Tiles

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      Abstract: Design of antimicrobial tiles seems necessary to combat against contagious diseases, especially COVID-19. In addition to personal hygiene, this technology facilitates public hygiene as antimicrobial tiles can be installed at hospitals, schools, banks, offices, lobbies, railway stations, etc. This review is primarily focused on preparing antimicrobial tiles using an antimicrobial layer or coatings that fight against germs. The salient features and working mechanisms of antimicrobial tiles are highlighted. This challenge is a component of the exploratory nature of nanoarchitectonics, that also extends farther than the realm of nanotechnology. This nanoarchitectonics has been successful at the laboratory scale as antimicrobial metal nanoparticles are mainly used as additives in preparing tiles. A detailed description of various materials for developing unique antimicrobial tiles is reported here. Pure metal (Ag, Zn) nanoparticles and a mixture of nanoparticles with other inorganic materials (SiO2,, TiO2, anatase, nepheline) have been predominantly used to combat microbes. The developed antimicrobial tiles have shown excellent activity against a wide range of Gram-positive and Gram-negative bacteria. The last section discussed a hypothetical overview of utilizing the antimicrobial tiles against SARS-CoV-2. Overall, this review gives descriptive knowledge about the importance of antimicrobial tiles to create a clean and sustainable environment. Graphical
      PubDate: 2022-05-17
       
  • Effectiveness of Annealing on the Structural, Electrical, and Optical
           Properties of Erbium(III)-tris(8-hydroxyquinolinato) Films for Possible
           Use in OLEDs

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      Abstract: Abstract In this study, Erbium tris-8-hydroxyquinoline (Erq3) thin films were deposited on a cleaned glass substrate using the thermal evaporation technique and then thermally annealed up to 523 K. The morphology, optical and electrical properties were investigated for as-deposited and annealed thin films. The grain sizes observed by AFM of the Erq3 thin films vary between 80 and 130 nm. The average surface roughness of the Erq3 thin films was seen to range between 46 and 65 nm. The increase in the annealing temperatures leads to an increase in the average crystallite size by about 60%. The evolution of the electrical and optical properties of our prepared thin films due to the annealing process was correlated with their structural properties. According to Tauc’s theory, a slight increase in the energy gap by about 0.17 eV due to the annealing process was recorded. The nonlinear parameters of Erq3 such as χ3 and n2 decreased by about 41% and 45% due to the increase of the annealing temperature up to 523 K. The increase of the annealing temperature up to 523 K leads to the decrease of the nonlinear coefficients of Erq3 due to the decrease of the localized defect states.
      PubDate: 2022-05-16
       
  • Improvement of Medical Applicability of Hydroxyapatite/Antimonous
           Oxide/Graphene Oxide Mixed Systems for Biomedical Application

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      Abstract: Abstract This study supports the binary and ternary merging tactic, this methodology is useful in the creation of new features that lacked in the parent constituents. Ra develops to reach its peak of 4.25 nm upon HAP/Sb2O3/GO which is shadowed by HAP/Sb2O3 with 3.87 nm. EDX technique offers quantitative, and qualitative elemental composition of the studied composite, where C, O, P, Ca, and Sb elements records 17.14, 66, 8.7, 7.57, and0.58%, respectively. Consequently, the composition is pure. Also, The BET technique’s resultant surface area is 39.49 for HAP/Sb2O3, and 50.76 m2/g for HAP/Sb2O3/GO. Additionally, The (HAP/GO, and HAP/Sb2O3/GO) ceramic composites microhardness was 3.2 ± 0.2 GPa for binary composite, and 3.5 ± 0.3 GPa for ternary composite. Thus, GO nano-materials enhance mechanical behavior. Applicably, the merging of the three components in one ternary nanocomposite presents the highest viability with 98.4 ± 0.8%, besides the highest antibacterial performance by 15.2 ± 0.4 mm for Escherichia coli and 16.1 ± 0.5 mm for Staphylococcus aureus.
      PubDate: 2022-05-12
       
  • Novel Self-assembled Isonicotinic Acid Derivative and Zinc Porphyrin Dyads
           and Applications in Dye Sensitized Solar Cells

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      Abstract: Abstract A new self-assemblies based on double-deck dyes ZnTPP-Wi (i = 1–3) were synthesized and applied in dye-sensitized solar cells (DSSCs). Anchoring molecules (Wi i = 1–3) consisting of phenyl carboxyl acid and cyanoacetic acid group. Capping layer dyes zinc meso-tetraphenylporphine (ZnTPP) with anchoring molecules Wi through axially coordination bonds of Zn-to-ligand self-assemblies solar cells devices. We herein report a consisting acylamide and cyanoacetic acid group W3 as an anchoring molecule for the axial coordination with upper zinc porphyrin ZnTPP. W3 was synthesized by introducing acylamide and cyanoacetic acid groups may inhibit adverse dye aggregation and improving electrons are effectively injected into the TiO2 semiconductor surface. Thus, W3 anchoring molecules can be used to fabricate efficient solar cells with ZnTPP porohyrin dye, achieving good photoelectric performance, indicative of their general applicability in fabricating good-performance DSSCs. The assembled modes were also verified by transmission electron microscopy (TEM). The photoelectrochemical efficiencies for dye ZnTPP-W3 are best than those of self-assembly dyes prevailingly ascribed to larger Jsc and Voc.
      PubDate: 2022-05-10
       
  • Alginate@Layered Silicate Composite Beads: Dye Elimination, Box–Behnken
           Design Optimization and Antibacterial Property

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      Abstract: Abstract The discharge of industrial waste comprising organic pollutants into aquatic environment induces numerous health risks. Crosslinked adsorbent beads were developed based on the alginate and the modified layered silicate (Ni-magadiite) for a promising removal of methylene blue (MB) dye. Response surface methodology (RSM), with Box–Behnken design matrix was successfully employed for the optimization of the adsorption parameters. The characterization of composite beads was realized by XRD, FTIR, SEM and TGA analysis. The results revealed that the adsorbent beads have more diverse and uneven morphology with the availability of functional groups and more thermally stable. Under the optimal conditions, the composite hydrogel beads showed a 95.17% removal efficiency of MB dye. The MB adsorption process follows a pseudo second order kinetic model with the adsorption isotherm adjusted to a Langmuir model. According to the statistical analysis of variance (ANOVA), the proposed quadratic model was significant, with a good correlation between the experimental and predicted data of the desired response. The reuse efficiency of the hydrogel beads was demonstrated with a removal efficiency of 85.48% after the third use.
      PubDate: 2022-05-10
       
  • Inspection of Radiation Shielding Proficiency and Effect of Gamma-Ray on
           ESR and Thermal Characteristics of Copper Oxide Modified Borate Bioglasses
           

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      Abstract: Abstract Samples of copper-modified bioactive borate glasses were synthesized and their radiation shielding properties including gamma-ray and neutron radiation shielding were investigated. Further, the glasses’ mass attenuation coefficients were measured with a NaI(Tl) detector while their gamma-ray shielding parameters were estimated using Phy-X/PSD program. Free-radical densities were measured via electron spin resonance to estimate the absorbed doses during accidental irradiation. The extensive reduction of the dose detection threshold (2 Gy) required the estimation of the signal of the non-irradiated sample. In addition, the effects of applied microwave power and absorbed dose on synthesized samples were studied. Finally, the thermal annealing of the emerging peaks, which were due to the irradiation signal-to-noise ratio and energy dependence, was studied to estimate the stabilities of such peaks. This modified material is recommended to detect and monitor the gamma-radiation dose because of its good dosimetric properties. Finally, regarding the presence of the two borate groups, triangular and the tetrahedrally coordinated, in their definite and typical wavenumbers, the FTIR spectra displayed simplified vibrations that were close to those of many bioglasses. This paper provides complementary results for the author's previous research examining this glass for low photon dose measurements using luminescence characteristics.
      PubDate: 2022-05-10
       
  • A Treatment of Wastewater Containing Safranin O Using Immobilized
           Myriophyllum spicatum L. onto Polyacrylonitrile/Polyvinylpyrrodlidone
           Biosorbent

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      Abstract: Abstract The phase inversion technique was used to successfully immobilize a submerged aquatic plant called Myriophyllum spicatum L. onto hybrid polymeric beads of Polyacrylonitrile/Polyvinylpyrrolidone (PAN/PVP). The surface morphology of the fabricated beads exhibited a porous structure with a homogeneous morphology. While their thermogram demonstrated a positive impact of PVP incorporation. In this study, the fabricated hybrid beads were tested against Safranin O as a dye adsorption model. Thus, the various parameters affecting Safranin O dye uptake onto the synthesized beads, such as time of contact, initial Safranin O concentration, adsorbent dose, and pH have been investigated and optimized using statistical response surface methodology (RSM). The results revealed that within 4 h, the fabricated PAN/PVP-M. spicatum beads showed a maximum adsorption capacity towards Safranin O dye of up to 217 mg g−1 using 0.3 g of the fabricated beads. The adsorption isotherm results were also fit to the Langmuir, Freundlich, and Temkin models, with the Langmuir model performing the best. The kinetic studies, on the other hand, obeyed the pseudo-second-order, and the fabricated PAN/PVP-M. spicatum beads showed appropriate reusability in the uptake of Safranin O dye from wastewater. Finally, the newly developed fabricated (PAN/PVP-M. spicatum) hybrid beads pave the way for the use of low-cost, efficient natural materials for wastewater treatment in the textile industry.
      PubDate: 2022-05-09
       
  • Graphitic Carbon Nitride Decorated with Iron Oxide Nanoparticles as a
           Novel High-Performance Biomimetic Electrochemical Sensing Platform for
           Paracetamol Detection

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      Abstract: Abstract Design and development of new generation smart sensors for medical applications have gained considerable interest of research community in the recent past. In this work, we propose the fabrication of highly sensitive paracetamol sensors-based iron oxide nanoparticles intercalated with graphitic carbon nitride (g-C3N4) (GCN) via insitu chemical synthesis. Structural features of the composites were analyzed through SEM, EDX, XRD, FTIR, and UV-Visible spectroscopic techniques. Presence of iron oxide nanoparticles in GCN, significantly improved the conductivity bare GCN from 16 to 125 S cm−1 due to extended π–π conjugation and large surface area in the composite system. The GCN-Iron oxide (GCN-FO) nanocomposite has been employed as an electrochemical sensing platform for non-enzymatic detection of paracetamol. The electrochemical studies and cyclic voltammetry (CV) results shows that the GCN-FO composite exhibit superior electrochemical properties due to their lower values of the oxidation and reduction potentials. Electrochemical impedance spectroscopy (EIS) studies indicate decreased charge-transfer resistance for iron oxide doped GCN composite in compare to base GCN. The improved electrochemical sensing performance of modified GCN-FO composite electrode is attributed to the formation heterojunctions between iron oxide nanoparticles and GCN. The modified GCN-FO electrodes were employed for non-enzymatic electrochemical detection of PR. The GCN-FO composite electrode shows excellent sensitivity towards PR with a LOD 0.3 μM. Furthermore, the modified GCN-FO electrodes show excellent reproducibility, selectivity, stability and anti-interference performance. Due to its low-cost fabrication, superior electrochemical sensing performance, these modified GCN-FO electrodes could be a promising material for the detection of paracetamol at low concentrations.
      PubDate: 2022-05-07
       
  • Mesoporous Zn–Ti Mixed Oxide Nanostructure: A New Bifunctional Catalyst
           for Partial Oxidation and Bezylation Reactions

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      Abstract: Here, we report a facile synthesis of porous zinc-titanium oxide based mixed oxide nanoparticles having Zn/Ti molar ratio 1:2 based on evaporation-induced sol–gel route using Pluronic triblock copolymer P123 as a template. Use of volatile ethanolic media during the evaporation-induced self-assembly (EISA) method facilitates the formation of Zn–Ti mixed oxide heterostructure. Powder XRD data reveals that the composite material displayed ZnTiO3/TiO2 phases. Morphology, composition, porosity, nanostructure and thermal stability have been systematically investigated using small angle powder XRD, FE SEM-EDS, TEM, N2 sorption, FT IR and TG-DTA techniques. The observed BET surface area of Zn–Ti mixed oxide was 231 m2 g−1 with a typical mesopore diameter (~ 5 nm) mostly arising from interparticle void space. The Zn–Ti mixed oxide catalyst showed bifunctional activity for Friedel–Craft benzylation of aromatics using benzyl chloride as well as partial oxidation of olefins under mild reaction conditions using dilute aqueous H2O2 as oxidant. Graphical Zn–Ti based porous nanoparticles synthesized using Pluronic P123 copolymer surfactant via EISA method has shown a very high surface area of 231 m2 g−1 and a significant bifunctional role for liquid phase oxidation and benzylation reaction.
      PubDate: 2022-05-05
       
  • Exploring the Biosynthesized Metal Nanoparticles for their Catalytic
           Degradation of Toxic Water Wastes and Antimicrobial Potential

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      Abstract: In recent decades, the analysis of nanoparticles is of greater importance for their applications in various fields. This present work also focuses the novel biological green material to synthesize the copper and cobalt oxide (Co3O4) nanoparticles. The copper oxide (CuO) and Co3O4 nanoparticles (nps) have been synthesized by biological strategy utilizing (Araucaria heterophylla) AH gum extract. The characterization techniques, i.e. UV, GC–MS, FT-IR, XRD, SEM, HR-TEM provide concrete information about the morphology, crystalline nature and structure of the synthesized nanoparticles. The high resolution TEM and SAED images confirm the formation of spherical shaped (Co3O4) and oval shaped (CuO) isolated nanoparticles. The catalytic adequacy of the developed catalyst, CuO and Co3O4 nanoparticles was analyzed for the degradation of dyes: Methylene Blue, Congo Red, Acid Violet.The kinetic investigations for the reduction of synthetic dyes by the nanoparticles were assessed and the reduction contemplates are very much fitted with the pseudo second order kinetic model with less time. The antibacterial and antifungal activity of the prepared nanoparticles have been evaluated against Escherichia coli, Staphylococcus aureus, Bacillus subtilis, Aspergillus niger and Candida albicans. Graphical
      PubDate: 2022-05-05
       
  • Upconversion of NaYF4: Yb, Er Nanoparticles Co-doped with Zr 4+ for
           Magnetic Phase Transition and Biomedical Imaging Applications

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      Abstract: Abstract Tracking of cancer cells and cytotoxicity of normal tissue are the leading problem in cancer treatment. The magnetic and fluorescent multifunctional particles evolve as an emerging alternative for future target recognition. The ferromagnetic materials potentially treat the defects in the gene. Hence, ferromagnetic materials are the best for the treatment of cancer using gene therapy. Here, β-NaYF4: Yb, Er compounds doped with 10%, 20% and 30% Zirconium (Zr) are prepared through hydrothermal technique. Citrate itself is a highly biocompatible surface ligand that labels the imaging probe. The X-ray diffraction analysis is evident for transforming hexagonal to cubic phase via Zr doping in NaYF4: Yb, Er compounds. The electron microscopic images identify the hexagonal plates. This compound can emit visible light in response to infrared (IR) light irradiation. Especially β-NaYF4: Yb, Er, and 10% of Zr, Yb, Er tridoped NaYF4 compounds show enhanced red emission exploited in bioimaging applications. Insignificantly, 30% of Zr, Yb, Er tridoped NaYF4 concentration exhibit hexagonal and dominating cubic (α) phase, could decrease red emissions intensity and magnetisation value. This Zr material reveals peculiar magnetic properties, especially ferromagnetism at a lower magnetic field and produces paramagnetism at a higher magnetic field. Here, 10–20% Zr, Yb, Er tridoped NaYF4 concentrations exhibit better magnetic properties. The resultant compound is viable for the VERO cells.
      PubDate: 2022-05-04
       
  • Microwave-Assisted Synthesis of the Flexible Iron-based MIL-88B
           Metal–Organic Framework for Advanced Energetic Systems

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      Abstract: Abstract The 3D metal–organic framework (MOF), MIL-88B, built from the trivalent metal ions and the ditopic 1,4-Benzene dicarboxylic acid linker (H2BDC), distinguishes itself from the other MOFs for its flexibility and high thermal stability. MIL-88B was synthesized by a rapid microwave-assisted solvothermal method at high power (850 W). The iron-based MIL-88B [Fe3.O.Cl.(O2C–C6H4–CO2)3] exposed oxygen and iron content of 29% and 24%, respectively, which offers unique properties as an oxygen-rich catalyst for energetic systems. Upon dispersion in an organic solvent and integration into ammonium perchlorate (AP) (the universal oxidizer for energetic systems), the dispersion of the MOF particles into the AP energetic matrix was uniform (investigated via elemental mapping using an EDX detector). Therefore, MIL-88B(Fe) could probe AP decomposition with the exclusive formation of mono-dispersed Fe2O3 nanocatalyst during the AP decomposition. The evolved nanocatalyst can offer superior combustion characteristics. XRD pattern for the MIL-88B(Fe) framework TGA residuals confirmed the formation of α-Fe2O3 nanocatalyst as a final product. The catalytic efficiency of MIL-88B(Fe) on AP thermal behavior was assessed via DSC and TGA. AP solely demonstrated a decomposition enthalpy of 733 J g−1, while AP/MIL-88B(Fe) showed a 66% higher decomposition enthalpy of 1218 J g−1; the main exothermic decomposition temperature was decreased by 71 °C. Besides, MIL-88B(Fe) resulted in a decrease in AP decomposition activation energy by 23% and 25% using Kissinger and Kissinger–Akahira–Sunose (KAS) models, respectively.
      PubDate: 2022-05-03
       
 
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