Enhanced catalytic elimination of typical VOCs over ZnCoOx catalyst derived from in situ pyrolysis of ZnCo bimetallic zeolitic imidazolate frameworks

被引：97
作者：
Guo, Yunlong [1 ,2 ]
Wen, Meicheng [1 ,2 ]
Song, Shengnan [1 ,2 ]
Liu, Qiuxia [1 ,2 ]
Li, Guiying [1 ,2 ]
An, Taicheng [1 ,2 ]
机构：
[1] Guangdong Univ Technol, Guangdong Engn Technol Res Ctr Photocatalyt Techn, Inst Environm Hlth & Pollut Control, Guangdong Key Lab Environm Catalysis & Hlth Risk, Guangzhou 510006, Peoples R China
[2] Guangdong Univ Technol, Sch Environm Sci & Engn, Guangdong Hong Kong Macao Joint Lab Contaminants, Guangzhou Key Lab Environm Catalysis & Pollut Con, Guangzhou 510006, Peoples R China
来源：
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2022年 / 308卷
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
ZIFs-derived metal oxide; Zn-doped catalyst; Catalytic VOC elimination; Acid sites; VOCs with different chemical structures; PHOTOCATALYTIC DEGRADATION; TOTAL OXIDATION; TOLUENE; NANOPARTICLES; COMBUSTION; BENZENE; NANOCATALYSTS; CHLOROBENZENE; ABATEMENT; OXIDES;
D O I：
10.1016/j.apcatb.2022.121212
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this work, ZnCoOx catalysts were prepared using in situ pyrolysis of ZnCo bimetallic zeolitic imidazolate frameworks (ZIFs), which were rationally designed on the basis of a metal ion doping strategy. The derived Zn0.05CoOx with proper doping of Zn (Zn/Co molar ratio of 0.05) exhibited superior catalytic activity and durability towards catalytic elimination of different volatile organic compounds (VOCs) including benzene, toluene and cyclohexane under simulated real-exhaust conditions. Both BrOnsted and Lewis acid sites were beneficial for cyclohexane degradation, whereas only Lewis acid sites were responsible for eliminations of benzene and toluene. In addition, the effect of chemical structures of VOCs on their catalytic elimination over Zn0.05CoOx was explored. Compared to benzene and toluene, cyclohexane molecule was more easily eliminated, attributed to strong adsorption onto catalyst and special chemical structure of cyclohexane. The obtained results can provide new strategy for rational design of highly efficient catalytic materials for eliminating VOCs.
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页数：9
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