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Chemosphere

Title:		Structure-property-performance relationship of transition metal doped WO(3) mixed oxides for catalytic degradation of organic pollutants
Author(s):		Chen Z; Li J; Wang S; Zhao J; Liu J; Shen J; Qi C; Yang P;
Address:		"Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, School of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, 312000, China. Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, China. School of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang, Henan, 453003, China. School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, China. Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, School of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, 312000, China. Electronic address: pyang2016@usx.edu.cn"
Journal Title:		Chemosphere
Year:		2023
Volume:		20230109
Issue:
Page Number:		137797 -
DOI:		10.1016/j.chemosphere.2023.137797
ISSN/ISBN:		1879-1298 (Electronic) 0045-6535 (Linking)
Abstract:		"Transition metal doped WO(3) mixed oxides (named as W-M-O, M = Nb, Fe, Cr, Cu, Ti or Sn, respectively) with high structure stability were synthesized by modified sol-gel method using citric acid as organic crosslinking agent, and were evaluated for catalytic elimination of low-concentration toluene, monochlorobenzene and 1,2-dichloroethance with high toxicity and relatively stable molecule structure, as the typical examples for the pollutants of various volatile organic compounds (VOCs). Results of the structure-property-performance relationship research showed that mesoporous structure and nanocrystalline/amorphous state were formed, and binary metal components were dispersed into each other, which contributed to promoting the metal/metal electron interaction and adjusting the physicochemical properties of mixed metal oxides. The sequence of apparent catalytic activity for toluene degradation was: W-Nb-O???W-Fe-O???W-Cr-O, W-Cu-O???W-Ti-O???W-Sn-O???WO(3), and the sequence for monochlorobenzene degradation was: W-Nb-O???W-Fe-O???W-Cr-O, W-Ti-O???W-Cu-O???W-Sn-O???WO(3). There existed cooperative catalytic effect: mesopore and surface acid sites of catalysts facilitated adsorption, activation and breakage of the C-X bond, and then redox sites of catalysts promoted deep oxidation of a series of reaction intermediates to transform into CO(2) and H(2)O. Especially, the optimized W-Nb-O catalyst deserved more attention, since it represented remarkable catalytic activity, selectivity and durability for three typical VOCs degradation along with good resistance to water vapor and corrosion of HCl"
Keywords:		Oxides/chemistry *Environmental Pollutants Chlorobenzenes Oxidation-Reduction Metals/chemistry *Transition Elements Catalysis Toluene/chemistry Acid-redox bifunctional centers Concentration-catalytic degradation Cooperative catalysis Organic pollutants WO;
Notes:		"MedlineChen, Zhenyang Li, Jing Wang, Songlin Zhao, Junhu Liu, Jiang Shen, Junhao Qi, Chenze Yang, Peng eng England 2023/01/13 Chemosphere. 2023 Mar; 316:137797. doi: 10.1016/j.chemosphere.2023.137797. Epub 2023 Jan 9"