81 results match your criteria: "Princess Nourah Bint Abdulrahman University P.O. Box 84428 Riyadh 11671 Saudi Arabia.[Affiliation]"

The non-toxic nature of lead-free materials with cubic perovskite structure has attracted the researcher's attention, and huge work is ongoing for the search of such materials. Furthermore, due to demand for their utilization in diverse applications, such as photovoltaic and optoelectronics, these inorganic-halide materials have become more enchanting for engineers. In the present work, all the key properties, including structural, electronic, optical, and mechanical, of rubidium based RbVX (where X is chlorine, bromine, and iodine) materials were extensively studied first-principle density functional theory (DFT).

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Article Synopsis
  • - This study explores the cubic double perovskite compounds CsKCrCl and CsNaCrCl using Density Functional Theory (DFT) and finds them stable with lattice constants between 10.58-10.20 Å and good tolerance factor values, indicating structural stability.
  • - The research confirms the elastic stability of these compounds through calculated elastic constants and reveals their half-metallic electronic behavior by analyzing their band structures and density of states.
  • - Additionally, the optical properties of the compounds were examined, determining various characteristics like dielectric functions, absorption coefficients, and reflectivity across a photon energy range up to 40 eV, suggesting potential applications in optical devices.
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Recent studies indicate that electrolyte ionic conductivity plays a pivotal role in reducing the operating temperature of solid oxide fuel cells (SOFCs). In this regard, nanocomposite electrolytes have drawn significant attention owing to their enhanced ionic conductivity and fast ionic transport. In this study, we fabricated CeO-LaBaBiFeO nanocomposites and tested them as a high-performance electrolyte for low-temperature solid oxide fuel cells (LT-SOFCs).

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A facile chemical procedure was utilized to produce an effective peroxy-monosulfate (PMS) activator, namely ZnCoO/alginate. To enhance the degradation efficiency of Rhodamine B (RhB), a novel response surface methodology (RSM) based on the Box-Behnken Design (BBD) method was employed. Physical and chemical properties of each catalyst (ZnCoO and ZnCoO/alginate) were characterized using several techniques, such as FTIR, TGA, XRD, SEM, and TEM.

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Bismuth tungstate BiWO: a review on structural, photophysical and photocatalytic properties.

RSC Adv

June 2023

Laboratoire de Chimie Appliquée des Matériaux, Centre des Sciences des Matériaux, Faculty of Sciences, Mohammed V University in Rabat Morocco

This review paper provides a comprehensive overview of the recent trends in bismuth tungstate (BiWO) research, covering its structural, electrical, photoluminescent, and photocatalytic properties. The structural characteristics of bismuth tungstate are explored in detail, including its different allotropic crystal structures with respect to its isotypic materials. The electrical properties of bismuth tungstate, such as its conductivity and electron mobility, are also discussed, along with its photoluminescent properties.

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At high pressure, the pressure dependencies of the structural, electronic, optical, and thermoelectric properties of FeHfSi Heusler were calculated using the FP-LAPW method within the framework of the density functional theory. The calculations were carried out using the modified Becke-Johnson (mBJ) scheme. Our calculations showed that the Born mechanical stability criteria confirmed the mechanical stability in the cubic phase.

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The main purpose of this research is to theoretically investigate the adsorption of two pharmaceutical molecules, aspirin and paracetamol, using two composite adsorbents, N-CNT/β-CD and Fe/N-CNT/β-CD nanocomposite polymers. A multilayer model developed by statistical physics is implemented to explain the experimental adsorption isotherms at the molecular scale, so as to overpass some limitations of the classical adsorption models. The modelling results indicate that the adsorption of these molecules is almost accomplished by the formation of 3 to 5 adsorbate layers, depending on the operating temperature.

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Nanomaterials and nanoparticles are a burgeoning field of research and a rapidly expanding technology sector in a wide variety of application domains. Nanomaterials have made exponential progress due to their numerous uses in a variety of fields, particularly the advancement of engineering technology. Nanoparticles are divided into various groups based on the size, shape, and structural morphology of their bodies.

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Catechol is a pollutant that can lead to serious health issues. Identification in aquatic environments is difficult. A highly specific, selective, and sensitive electrochemical biosensor based on a copper-polypyrrole composite and a glassy carbon electrode has been created for catechol detection.

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Article Synopsis
  • - The study examines the structural, electronic, elastic, and magnetic properties of Cerium Copper Manganese Vanadium (CeCuMnVO) compounds using Density Functional Theory (DFT) with various potentials, showing how lattice parameters increase with manganese substitution due to larger atomic radii.
  • - Results suggest that CeCuVO is the most stable compound thermodynamically, and substituting manganese for copper transforms the material from non-magnetic to anti-ferromagnetic while also altering its electrical resistance, indicating semi-metallic behavior.
  • - The elastic properties reveal mechanical stability, anisotropy, and ductility, which highlight the potential for these manganese-based compounds to be used in spintronic applications and magnetic cloaking devices.
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The conductive composite Co@SnO-PANI was successfully synthesized using hydrothermal/oxidative synthesis. Using differential pulse voltammetry, a glassy carbon electrode modified with a CoSnO-PANI (polyaniline)-based electrochemical biosensor has been created for the quick detection of two phenolics, hydroquinone (Hq) and catechol (Cat). Differential pulse voltammetry (DPV) measurements revealed two well-resolved, strong peaks for GCE@Co-SnO-PANI, which corresponded to the oxidation of Hq and Cat at 275.

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It is common knowledge that the O evolution reaction (OER) is a crucial half-reaction in the electrolysis of water. However, it is currently difficult to create inexpensive OER electrode materials in a way that is efficient, simple, and environmentally friendly. In this research, metal oxy-hydroxides with numerous oxygen defects (M-OOHv) are created at surface of Cu foam (CF) using a unique, straightforward electro-oxidation reconstitution (ER) process.

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Using DFT, the electronic structure, optical, and photocatalytic properties of PN (P = Ga, Al) and MCO (M = Ti, Zr, Hf) monolayers and their PN-MCO van der Waals heterostructures (vdWHs) are investigated. Optimized lattice parameters, bond length, bandgap, conduction and valence band edges show the potential of PN (P = Ga, Al) and MCO (M = Ti, Zr, Hf) monolayers in photocatalytic applications, and the application of the present approach to combine these monolayers and form vdWHs for efficient electronic, optoelectronic and photocatalytic applications is shown. Based on the same hexagonal symmetry and experimentally achievable lattice mismatch of PN (P = Ga, Al) with MCO (M = Ti, Zr, Hf) monolayers, we have fabricated PN-MCO vdWHs.

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As their manufacturing and consumption have increased, pharmaceutical chemicals have increasingly been found in wastewater. It is necessary to look into more effective methods, including adsorption, because current therapies can't completely eliminate these micro contaminants. This investigation aims to assess the diclofenac sodium (DS) adsorption onto an FeO@TAC@SA polymer in a static system.

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Perovskites are a significant class of materials with diverse uses in modern technology. The structural, electronic, elastic, thermoelectric, and optical properties of RbTiCl and CsTiCl perovskites were estimated using the FP-LAPW method within the framework of density functional theory. The exchange-correlation energy of both analyzed systems was calculated using the Generalized Gradient Approximation (GGA) functional.

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Nanomaterials are the most effective class of substances for use as adsorbents in wastewater treatment. Hence, the current study involves the facile and low-cost synthesis of MgMnO/MnO and MgMnO/MnO/MgMnO as novel nanostructures from mixed solutions of Mg(ii) and Mn(ii) ions using the Pechini sol-gel method. After that, the remaining powder was calcined at 500, 700, and 900 °C for 3 h; the products were designated as G500, G700, and G900, respectively.

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Microbial Multidrug Resistance (MDR) is an emerging global crisis. Derivatization of natural or synthetic scaffolds is among the most reliable strategies to search for and obtain novel antimicrobial agents for the treatment of MDR infections. Here, we successfully manipulated the synthetically flexible isatin moieties to synthesize 22 thiazolyl-pyrazolines hybrids, and assessed their potential antimicrobial activities against various MDR pathogens, using the broth microdilution calorimetric XTT reduction method.

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Metal organic frameworks (MOFs) are attracting significant attention for applications including adsorption, chemical sensing, gas separation, photocatalysis, electrocatalysis and catalysis. In particular, zeolitic imidazolate framework 8 (ZIF-8), which is composed of zinc ions and imidazolate ligands, have been applied in different areas of catalysis due to its outstanding structural and textural properties. It possesses a highly porous structure and chemical and thermal stability under varying reaction conditions.

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Enhanced electrocaloric effect, energy storage density and pyroelectric response from a domain-engineered lead-free BaTiSnZrO ferroelectric ceramic.

RSC Adv

October 2022

Université de Monastir, Faculté des Sciences de Monastir, Laboratoire de la Matière Condensée et des Nanosciences LR11ES40 5000 Monastir Tunisia +216-92188163.

A BaTiSnZrO (BTSZ) ceramic was prepared by a conventional solid-state reaction method. Its structural, dielectric, ferroelectric, and pyroelectric properties were carefully studied. The Rietveld refinement was used to characterize the structural proprieties of the synthesized ceramic.

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The increasing CO concentration in the atmosphere has caused profound environmental issues such as global warming. The use of CO as a feedstock to replace traditional fossil sources holds great promise to reduce CO emissions. The electrochemical conversion of CO has attracted much attention because it can be powered by renewable sources such as solar energy.

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1,3,4-Thiadiazole molecules (1-4) were synthesized by the reaction of phenylthiosemicarbazide and methoxy cinnamic acid molecules in the presence of phosphorus oxychloride, and characterized with UV, FT-IR, C-NMR, and H-NMR methods. DFT calculations (b3lyp/6-311++G(d,p)) were performed to investigate the structures' geometry and physiochemical properties. Their antibacterial activity was screened for various bacteria strains such as , ATCC 13048, , , , and Gram positive such as ATCC 25923, ATCC 7644, , , ATCC, , , , alfa , and found to have an inhibitory effect on and , while molecules 1, 3 and 4 had an inhibitory effect on and alpha .

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Mixed matrix woven forward osmosis (MMWFO) membranes made of polyethersulfone (PES)/graphene oxide nanosheets (GO NSs) were made by inserting varying wt% ratios of GO NSs (zero to 0.1 wt%) into the PES matrix. A coated woven fabric material was used to cast the membrane polymer solution.

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Hexavalent chromium is a very poisonous oxyanion and has had a negative impact on human health. This study assessed the viability of removing chromium(vi) using micellar modified adsorbents. In this study, chromium(vi) was removed from locally accessible wheat bran using separate applications of anionic sodium dodecyl sulfate (SDS) and cationic cetyltrimethylammonium bromide (CTAB) surfactants.

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A step-scheme (S-scheme) photocatalyst made of sulfurized graphitic carbon nitride/cobalt doped zinc ferrite (S-g-CN/Co-ZF) was constructed using a hydrothermal process because the building of S-scheme systems might increase the lifespan of highly reactive charge carriers. Utilizing cutting-edge methods, the hybrid photocatalyst was evaluated by employing TEM, XPS, XRD, BET, FTIR, transient photo-response, UV-vis, EIS and ESR signals. In order to create a variety of binary nanocomposites (NCs), nanoparticles (NPs) of 6% cobalt doped zinc ferrite (Co-ZF) were mixed with S-g-CN at various concentrations, ranging from 10 to 80 wt%.

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