改性镧系钙钛矿催化剂强化挥发性有机物催化氧化的研究进展

Research progress in enhanced catalytic oxidation of VOCs by modified La-based perovskite catalyst

钙钛矿因其结构稳定并具有优异的物化性质,近年来在催化剂方面的应用受到了广泛关注。本文综述了采用不同方法对镧系钙钛矿进行改性来增强催化剂的活性、抗毒性、稳定性和选择性的研究进展;分析了镧系钙钛矿的结构、表面参数、活性氧和低温还原性对于挥发性有机物转化效率的影响,重点阐述了通过优选钙钛矿的制备方法、制备负载型钙钛矿和掺杂型钙钛矿等改性方法来提高镧系钙钛矿催化剂的性能,由此展望了未来改性镧系钙钛矿催化剂的研究方向:采用非金属元素掺杂或多种强化方法结合制备高效催化剂、利用催化燃烧协同光催化氧化转化挥发性有机物、进一步通过实验和仿真模拟制备理想钙钛矿催化剂催化氧化多种挥发性有机物混合物以满足工业化需求。

The application of perovskite in catalysts has received extensive attention,due to its stable structure and special physical and chemical properties.In this paper,the research progress in strengthening the activity,anti-toxicity,stability and selectivity of La-based perovskite catalysts with different methods is reviewed.The effects of the structure,surface parameters,active oxygen and lowtemperature reducibility of La-based perovskite catalysts on the conversion efficiency of volatile organic compounds were analyzed.The optimization of the perovskite synthesis,and the preparation of supported perovskite and doped perovskite to improve the performance of the La-based perovskite catalyst are also introduced.And the future research directions of the La-based perovskite catalysts are prospected,which are to prepare efficient catalysts by doping non-metal elements and combining multiple methods,to integrate catalytic combustion and photocatalytic oxidation for volatile organic compounds conversion,and to further use experiments and simulations in seeking the ideal catalyst for the catalytic oxidation of volatile organic compound mixtures to meet industrial needs.