文献类型：期刊文献

英文题名：Structure-property-performance relationship of transition metal doped WO3 mixed oxides for catalytic degradation of organic pollutants

作者：Chen, Zhenyang[1];Li, Jing[2];Wang, Songlin[3];Zhao, Junhu[4];Liu, Jiang[1];Shen, Junhao[1];Qi, Chenze[1];Yang, Peng[1]

机构：[1]Shaoxing Univ, Sch Chem & Chem Engn, Zhejiang Key Lab Alternat Technol Fine Chem Proc, Shaoxing 312000, Peoples R China;[2]Liaocheng Univ, Coll Chem & Chem Engn, Shandong Prov Key Lab Chem Energy Storage & Novel, Liaocheng 252059, Peoples R China;[3]Henan Inst Sci & Technol, Sch Chem & Chem Engn, Xinxiang 453003, Henan, Peoples R China;[4]Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430070, Peoples R China

年份：2023

卷号：316

外文期刊名：CHEMOSPHERE

收录：SCI-EXPANDED(收录号：WOS:000992387500001)、、EI(收录号：20230213380756)、Scopus(收录号：2-s2.0-85146074691)、WOS

基金：The authors acknowledged the financial supports from the National Natural Science Foundation of China (NSFC, No. 21906106, No. 21902069) , the Zhejiang Provincial Natural Science Foundation (No. LQ19B030004) , the Training Plan for University's Young Backbone Teachers of Henan Province (2021GGJS121) , the Program for Science & Technology Innovation Talents in Universities of Henan Province (23HASTIT014) and the Science Technology Bureau of Shaoxing, Zhejiang Province, China.

语种：英文

外文关键词：Organic pollutants; Concentration-catalytic degradation; WO3-based mixed oxide; Acid-redox bifunctional centers; Cooperative catalysis

外文摘要：Transition metal doped WO3 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 rela-tionship 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>WO3, 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>WO3. 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 CO2 and H2O. 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.