锰基催化剂协同等离子降解VOCs研究进展

Progress of manganese catalysts for non-thermal plasma catalysis on VOCs degradation

等离子催化技术中,Mn基催化剂以其优异的催化降解VOCs和臭氧性能受到国内外研究者的广泛关注。本文从以下方面进行了综述:催化剂在等离子降解中的作用机理,包括改变放电状态、激发新的活性自由基、提供反应位点;常见的单金属及复合金属活性相类型;介绍了浸渍法、水热合成法、溶胶凝胶法和共沉淀法等主要制备方法;催化剂和等离子的协同方式;从统计角度分析文献报道中Mn基催化剂对甲苯的降解效率及抑制臭氧、NOx的作用;最后对其研究前景进行了展望:Mn基催化剂将依然是该领域的研究热点;通过引入其他金属和非金属、增加活性相分散度、提升载体吸附性能等方法进一步提高催化剂活性和稳定性;利用原位技术探索等离子与活性相的作用机理。

Manganese catalysts have excellent catalytic degradation of VOCs and ozone in the field of non-thermal plasma catalysis.In this review,a comprehensive discussion of this kind of catalysts is provided from the following aspects:the synergistic effects and catalytic mechanism of manganese catalysts in the non-thermal plasma catalysis system,including changing discharge behavior,producing new active species and providing reactive sites;the common kinds of active phases,such as single metal and multi-metal catalysts;the main preparation methods:impregnation method,hydrothermal synthesis,co-precipitation method,and sol-gel method;the combination form of plasma and catalysts;the effects of manganese catalyst and energy density on the plasma catalytic degradation of toluene based on statistical analysis,the reduction of by-products of ozone and NOx;finally the perspective and future direction of manganese catalysts were proposed:manganese catalysts are still the hotspot in the field of non-thermal plasma catalysis;by the means of introducing other metal and non-metal elements,improving the dispersity of active phases,enhancing the adsorption of catalysts to further increase the catalytic activity and stability;investigating interaction mechanism between plasma and active sites of catalysts through in-situ detection technologies.