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Synthesis of PVA-assisted MnO-CuO-ZnO-g-CN quaternary nanocomposite for the degradation of methylene blue from industrial wastewater.
Heliyon
December 2024
Department of Applied Chemistry, School of Applied Natural Science, Adama Science and Technology University, P.O. Box 1888, Adama, Ethiopia.
The pristine phases SS1(ZnO), SS2(MnO), and SS3 (CuO) photocatalysts and mixed phases of ZnO-based nanocomposites were synthesized by the sol-gel method. Whereas SS4 (g-CN) was prepared through polymerization of urea. The synthesized photocatalysts were characterized using TGA-DTA, XRD, DRS, PL, DLS, FTIR, SEM, TEM, and HRTEM.
View Article and Find Full Text PDFSonocatalytic degradation of RB-5 dye using ZnO nanoparticles doped with transition metals.
Environ Sci Pollut Res Int
December 2024
Departamento de Ciencias Básicas, Universidad Autónoma Metropolitana-Azcapotzalco, Av. San Pablo 420, C.P. 02128, Mexico City, Mexico.
In this study, ZnO was doped and co-doped with rhodium and tungsten to assess the impact of these transition metals on the sonocatalytic degradation of reactive black 5 azo dye (RB-5). Structural analysis revealed that doping ZnO with 1% Rh and W does not alter its wurtzite hexagonal structure, although minor changes in cell parameters were observed due to differences in electronic density. Interestingly, co-doping resulted in lower degradation efficiency than single doping, with W-ZnO emerging as the most effective catalyst, achieving 100% RB-5 degradation within 60 min, likely due to a higher density of oxygen vacancies and hydroxyl groups.
View Article and Find Full Text PDFControllable Active Intermediate in CO Hydrogenation Enabling Highly Selective ,-Dimethylformamide Synthesis via -Formylation.
J Am Chem Soc
December 2024
Key Laboratory of Advanced Catalysis, Gansu Province, State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, China.
,-Dimethylformamide (DMF) is a widely used solvent, and its green and low-carbon synthesis methods are in high demand. Herein, we report a new approach for DMF synthesis using a continuous flow reaction system with a fixed-bed reactor and a ZnO-TiO solid solution catalyst. This catalyst effectively utilizes CO, H, and dimethylamine (DMA) as feedstocks, demonstrating performance with 99% DMF selectivity and single-pass DMA conversion approaching thermodynamic equilibrium.
View Article and Find Full Text PDFA rare case of Na/Zn isomorphism in the crystal structure of acentric zincophosphate NaZn[Zn(PO)].
Acta Crystallogr B Struct Sci Cryst Eng Mater
February 2025
Lomonosov Moscow State University, Leninskie Gory 1, Moscow, 119991, Russian Federation.
A microporous zincophosphate with the idealized formula NaZn[Zn(PO)] was obtained through high-temperature hydrothermal synthesis and characterized by scanning electron microscopy, microprobe analysis and X-ray diffraction. The orthorhombic compound, which crystallizes in acentric space group Pna2 with unit-cell parameters a = 12.9901 (2), b = 16.
View Article and Find Full Text PDFHollow-SiO@Cu Zn Mg Al-LDHs as catalyst precursors for CO hydrogenation to methanol.
Chem Sci
December 2024
Chemistry Research Laboratory, Department of Chemistry, University of Oxford 12 Mansfield Road Oxford OX1 3TA UK +44 (0)1865 272686.
We report a new synthetic strategy for preparing well-organised, spherical and mesoporous, mixed-metal, hollow-core@layered double hydroxides. Hollow-SiO@Cu Zn Mg Al-LDHs ( + + = 2.32 ± 0.
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