规整形貌和多孔催化剂对挥发性有机物氧化的催化性能

Catalytic Performance of Regularly Morphological and Porous Catalysts for the Oxidation of Volatile Organic Compounds

大部分挥发性有机物(volatile organic compounds,VOCs)污染大气环境,危害人身健康,严格控制VOCs的排放迫在眉睫.催化氧化是消除VOCs的有效途径,关键在于研发新型高效催化剂.简要综述了近年来笔者课题组在规整形貌过渡金属氧化物、介孔金属氧化物、大孔金属氧化物、大孔复合金属氧化物及其负载过渡金属氧化物和贵金属纳米催化剂的制备及其对VOCs氧化的催化性能.结果表明,催化剂的活性与其比表面积、孔结构、粒子分散度、粒径、吸附氧物种浓度、低温还原性、反应物活化能力、金属氧化物或贵金属(合金)与载体之间的相互作用等因素有关.此外,还展望了此类研究工作的未来发展趋势.

Most of volatile organic compounds( VOCs) pollute the atmosphere environment and are harmful to human health,hence it is urgent to strictly control the emission of VOCs. Catalytic oxidation is an effective pathway for the removal of VOCs,in which the key issue is the development of novel and high-performance catalysts. In this review, we briefly summarize the preparation and catalytic performance of regularly morphological transition metal oxide,mesoporous metal oxide,macroporous metal oxide,macroporous mixed metal oxide,and their supported transition metal oxide and noble metal nanocatalysts that have been investigated by our research group. It was found that catalytic performance was associated with the factors,such as specific surface area,pore structure,particle dispersion,particle size,adsorbed oxygen species concentration,low-temperature reducibility,reactant activation ability or interaction between metal oxide or noble metal( alloy) and support. In addition,the development trend in future work on such a topic has been envisioned.