氢化改性钒基催化剂降解氯苯的机理研究  

Mechanism studies on degradation of chlorobenzene over hydrogenation-modified vanadium-based catalysts

作　　者：陈士杰[1] 宗建成[1] 傅一枭 罗京 秦恒飞[2] CHEN Shi-jie;ZONG Jian-cheng;FU Yi-xiao;LUO Jing;QIN Heng-fei(Changzhou Liu Guojun Vocational Technology College,Changzhou 213025,China;School of Resources and Environmental Engineering,Jiangsu University of Technology,Changzhou 213001,China)

机构地区：[1]常州刘国钧高等职业技术学校,江苏常州213025 [2]江苏理工学院资源与环境工程学院,江苏常州213001

出　　处：《现代化工》2024年第9期167-171,179,共6页Modern Chemical Industry

基　　金：教育部高等学校科学研究发展中心专项课题(ZJXF2022320)。

摘　　要：为了在低温下高效、稳定地降解挥发性氯代有机污染物(CVOCs),以偏钒酸铵为VO_(x)前驱体制备2D纳米片与3D纳米结构的互穿多孔网络结构的L-V_(2)O_(5)催化剂,并通过氢化技术对催化剂中部分V^(5+)进行还原(H-V_(2)O_(5))。结果表明,该氢化技术降低了催化剂中部分V^(5+)的化学价态,增加了V—O(Ⅱ)和V—O(Ⅳ)上的氧空位数量和催化剂表面活性氧数量。在275℃时,相较于L-V_(2)O_(5),H-V_(2)O_(5)对氯苯催化降解的效率提高了约40%。To efficiently and stably degrade chlorine-containing volatile organic compounds(CVOCs)at low temperature,L-V_(2)O_(5) catalysts with interpenetrating porous network structures of 2D nanosheets and 3D nanostructures are prepared by using ammonium metavanadate as a VOx precursor.Furthermore,part of V^(5+)in the catalysts is reduced through hydrogenation to form H-V_(2)O_(5).Results show that this hydrogenation technique decreases the chemical valence of some V^(5+)in the catalyst,increases the number of oxygen vacancies on V-O(Ⅱ)and V-O(Ⅳ),and increases the amount of active oxygen on the catalyst surface.The catalytic degradation efficiency of chlorobenzene by H-V_(2)O_(5) at 275℃ is around 40% higher than that by L-V_(2)O_(5).

关 键 词：多孔网络结构 钒基催化剂 氢化技术 氯苯降解 含氯挥发性有机物 

分 类 号：O6-3[理学—化学]