文献类型：期刊文献

英文题名：Promoting the performance of Nb₂O₅ by doping transition metal oxide for catalytic degradation of monochlorobenzene and toluene

作者：Liu, Jiang[1];Zuo, Shufeng[1];Lin, Siyu[2];Shan, Bofang[3];Zhou, Xiang[1];Zhao, Junhu[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]Ningbo Acad Prod & Food Qual Inspect, Ningbo Fiber Inspect Inst, Ningbo 315048, Peoples R China;[3]Zhejiang Hengfeng New Mat Co LTD, Shaoxing 312000, Peoples R China

年份：2023

卷号：25

起止页码：3642

外文期刊名：JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T

收录：SCI-EXPANDED(收录号：WOS:001109642800001)、、EI(收录号：20233014427571)、Scopus(收录号：2-s2.0-85165230787)、WOS

基金：The authors gratefully acknowledge the financial support for this research paper provided by the National Natural Science Foundation of China (NSFC, No. 21906106), the Zhejiang Provincial Natural Science Foundation (No. LQ19B030004), the Leading Talents Training Program of Zhejiang Provincial University, and the Science Technology Bureau of Shaoxing(Development of carbon dioxide based copolymer and degradable materials).

语种：英文

外文关键词：VOCs; Catalytic elimination; Nb2O5; Structure-property relationship; Synergy catalysis

外文摘要：A string of niobium-based transition metal composite oxides (named as Nb2O5-MOx, M = Cr, V, Ti, Cu, Co, Fe, Mn and Ni, respectively) were synthesized, and their catalytic performances for the elimination of monochlorobenzene/toluene as typical VOCs were studied. Research result of structure-property relationship showed that nanocrystalline/amorphous state and mesoporous structure were formed, and transition metal elements were highly dispersed into Nb2O5, which were conducive to adjusting the physico-chemical properties of Nb2O5-MOx and enhancing the synergistic catalysis effect. The mesoporous and surface acidity of material promoted the adsorption, sensitization and breakage of chemical bonds in the organic reactants, and then reaction intermediates were oxidized and transformed into CO2 and H2O by the redox sites of material. Oxidation properties and electron density of catalysts were the most important factors affecting the catalytic combustion reaction. The order of apparent catalytic activity for monochlorobenzene elimination was: Nb2O5-Cr2O3 > Nb2O5-CuO > Nb2O5-Co3O4 > Nb2O5-Fe2O3 > Nb2O5-V2O5 > Nb2O5-Mn3O4 > Nb2O5 > Nb2O5-NiO, and the order for toluene degradation was: Nb2O5-CuO > Nb2O5-Mn3O4 > Nb2O5-V2O5 > Nb2O5-Fe2O3 > Nb2O5-Cr2O3 > Nb2O5-Co3O4 > Nb2O5 > Nb2O5-NiO. Considering the toxicity of Cr and V, the by-products produced by Cu and the high price of Co, Nb2O5-Fe2O3 was selected as the most suitable catalyst. Its catalytic activity could reach 69% conversion for monochlorobenzene (320 degrees C), 80% for toluene (320 degrees C) and 81% for 1,2-dichloroethane elimination (270 degrees C), and also maintain 120 h without significant deactivation, indicating that the applicability of Nb2O5-Fe2O3 was worthy of more attention and further study.(c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CCBY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).