典型稀土材料催化氧化挥发性有机物研究进展

Research Progress of Typical-Rare Earth Metals for Catalytic Oxidation of Volatile Organic Compounds

挥发性有机物(volatile organic compounds,VOCs)是参与臭氧、二次气溶胶形成的重要前体物,其生物毒性、光化学污染性受到人们的广泛关注,催化氧化是防治VOCs污染的主要技术。稀土材料由于富含表面晶格缺陷、良好的高温稳定性、VOCs亲和力和储释氧能力,在VOCs催化氧化方面受到重点关注。本文就典型稀土材料用于VOCs的热催化、光催化以及光热催化处理开展评述,阐述VOCs的来源、危害和催化氧化机制,探讨不同典型稀土材料的制备方法、结构特征、化学状态用于催化氧化VOCs的效果,明晰了稀土材料的优势并分析了目前面临的难题,以期为稀土材料在VOCs治理中的应用及推广提供参考。

Volatile organic compounds(VOCs)are important precursors involved in the formation of ozone and secondary aerosols,and their biological toxicity and photochemical pollution have received widespread attention.Catalytic oxidation is the main technology for the prevention and control of VOCs pollution.Rare earth materials have attracted attention in the catalytic oxidation of VOCs due to their rich surface lattice defects,good high temperature stability,and excellent oxygen storage/release ability.This article reviews the use of typical rare earth materials for thermal catalysis,photocatalysis,and photothermal catalytic treatment of VOCs,which elaborates the sources,hazards,and catalytic oxidation mechanisms of VOCs,discusses the preparation methods,structural characteristics,and chemical states of different typical rare earth materials for catalytic oxidation of VOCs.Moreover,it clarifies the advantages of rare earth materials and analyzes the current problems,in order to provide reference for the application and promotion of rare earth materials in VOCs governance.