文献类型：期刊文献

英文题名：Preparation of tungsten-iron composite oxides and application in environmental catalysis for volatile organic compounds degradation

作者：Liu, Jiang[1];Wang, Song-Lin[2];Xuan, Ji-Li[1];Shan, Bo-Fang[3];Luo, Hong[3];Deng, Li-Ping[1];Yang, Peng[1,3,4];Qi, Chen-Ze[1]

机构：[1]Shaoxing Univ, Sch Chem & Chem Engn, Zhejiang Key Lab Alternat Technol Fine Chem Proc, Shaoxing 312000, Peoples R China;[2]Henan Inst Sci & Technol, Sch Chem & Chem Engn, Xinxiang 453003, Henan, Peoples R China;[3]Zhejiang Hengfeng New Mat Co LTD, Shaoxing 312000, Peoples R China;[4]Zhejiang Univ, Coll Chem & Biol Engn, State Key Lab Chem Engn, Hangzhou 310027, Peoples R China

年份：2022

卷号：4

期号：1

起止页码：38

外文期刊名：TUNGSTEN

收录：ESCI(收录号：WOS:000879800300005)、EI(收录号：20222112137872)、Scopus(收录号：2-s2.0-85125909941)、WOS

基金：This work was financially supported by the Zhejiang Provincial Natural Science Foundation (Grant No. LQ19B030004), the National Natural Science Foundation of China (NSFC, Grant Nos. 21906106 and 21808048) and the soft science research project of Shaoxing Association of Science and Technology.

语种：英文

外文关键词：Volatile organic compounds; Catalytic combustion; WO3; FeWO4; Composite oxide; Synergistic catalytic effect

外文摘要：Emission of volatile organic compounds has important influence on complex air pollution and human health. In this paper, a series of tungsten-iron composite oxides with different proportions and preparation methods were synthesized and first used for catalytic combustion of chlorobenzene and toluene, as typical polluting gas sources. These WO3-based solid catalytic materials were systematically characterized by modern analytical methods, and the results showed that there was strong electron interaction between W and Fe elements in the composite oxides, and the presence of a certain amount of tungsten oxide inhibited the crystallization of iron oxide, and vice versa, which were beneficial to the uniform dispersion of tungsten-iron components into each other and the improvement of redox properties. Compared with single-component oxide, the formation of tungsten-iron composite oxide affected the micro-structure, improved the specific surface area and optimized the pore structure of materials. The performance test results showed that the tungsten-iron composite oxide (FeWO4-0.5Fe(2)O(3), molar ratio of tungsten and iron was 1/2) prepared using citric acid-based sol-gel method was the optimal, and its catalytic degradation efficiency could reach 90% for chlorobenzene and 83% for toluene at 320 degrees C, and maintain at least 60 h without obvious deactivation, with high selectivity to the formation of HCl and CO2.