Department of Environmental Science and Technology, Tianjin Key Lab of Indoor Air Environmental Quality Control, State Key Laboratory of Engines, Tianjin University, Tianjin 300350, China.
State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Environ Sci Technol. 2023 Jul 4;57(26):9495-9514. doi: 10.1021/acs.est.2c09861. Epub 2023 Jun 14.
Volatile organic compounds (VOCs) harm the environment and human health and have been of wide concern and purified efficiently by catalytic oxidation. Spinel oxides, mainly composed of transition metal elements with low price and extensive sources, have been widely investigated as efficient and stable catalysts for VOCs oxidation due to their adjustable element composition, flexible structure, and high thermal/chemical stability. However, it is necessary to dissect the design of the spinel in a targeted way to satisfy the removal of different types of VOCs. This article systematically summarizes the recent advances regarding the application of spinel oxides for VOCs catalytic oxidation. Specifically, the design strategies of spinel oxides were first introduced to clarify their effect on the structure and properties of the catalyst. Then the reaction mechanism and degradation pathway of different kinds of VOCs on the spinel oxides were in detail summarized, and the characteristic requirements of the spinel oxides for various VOCs purification were analyzed. Furthermore, the practice applications were also discussed. Finally, the prospects were proposed to guide the rational design of spinel-based catalysts for VOCs purification and intensify the understanding of reaction mechanisms.
挥发性有机化合物（VOCs）对环境和人体健康有害，已引起广泛关注，并通过催化氧化有效地进行了净化。尖晶石氧化物主要由价格低廉、来源广泛的过渡金属元素组成，由于其可调的元素组成、灵活的结构和高的热/化学稳定性，已被广泛研究作为 VOCs 氧化的高效和稳定催化剂。然而，有必要有针对性地剖析尖晶石的设计，以满足不同类型 VOCs 的去除。本文系统地总结了尖晶石氧化物在 VOCs 催化氧化中的应用进展。具体来说，首先介绍了尖晶石氧化物的设计策略，以阐明它们对催化剂结构和性能的影响。然后详细总结了不同种类 VOCs 在尖晶石氧化物上的反应机理和降解途径，并分析了尖晶石氧化物对各种 VOCs 净化的特征要求。此外，还讨论了实际应用。最后，提出了展望，以指导基于尖晶石的催化剂用于 VOCs 净化的合理设计，并加深对反应机理的理解。
