College of Energy and Mechanical Engineering, Shanghai University of Electric Power, No. 2588 Changyang Road, Yangpu District, Shanghai 201306, China.
Shanghai Power Environmental Protection Engineering Technology Research Center, No. 2588 Changyang Road, Yangpu District, Shanghai 201306, China.
Environ Sci Technol. 2022 Jul 5;56(13):9220-9236. doi: 10.1021/acs.est.2c02772. Epub 2022 May 17.
Volatile organic compounds (VOCs) are atmospheric pollutants that have been of concern for researchers in recent years because they are toxic, difficult to remove, and widely sourced and easily cause damage to the environment and human body. Most scholars use low-temperature plasma biological treatment, catalytic oxidation, adsorption, condensation, and recovery techniques to treat then effectively. Among them, catalytic oxidation technology has the advantages of a high catalytic efficiency, low energy consumption, high safety factor, high treatment efficiency, and less secondary pollution; it is currently widely used for VOC degradation technology. In this paper, the catalytic oxidation technology for the degradation of multiple types of VOCs as well as the development of a single metal oxide catalyst have been briefly introduced. We also focus on the research progress of composite metal oxide catalysts for the removal of VOCs by comparing and analyzing the metal component ratio, preparation method, and types of precursors and the catalysts' influence on the catalytic performance. In addition, the reason for catalyst deactivation and a correlation between the chemical state of the catalyst and the electron distribution are discussed. Development of a composite metal oxide catalyst for the catalytic oxidation of VOCs has been proposed.
挥发性有机化合物（VOCs）是近年来引起研究人员关注的大气污染物，因为它们具有毒性、难以去除、来源广泛且容易对环境和人体造成损害。大多数学者使用低温等离子体生物处理、催化氧化、吸附、冷凝和回收技术来有效处理它们。其中，催化氧化技术具有催化效率高、能耗低、安全系数高、处理效率高、二次污染少等优点；它是目前广泛应用于 VOC 降解技术。本文简要介绍了多种类型 VOCs 的催化氧化技术以及单一金属氧化物催化剂的发展。我们还通过比较和分析金属成分比、制备方法、前体类型以及催化剂对催化性能的影响，重点研究了去除 VOCs 的复合金属氧化物催化剂的研究进展。此外，还讨论了催化剂失活的原因以及催化剂的化学状态与电子分布之间的相关性。提出了一种用于催化氧化 VOCs 的复合金属氧化物催化剂的发展。
