摘要
纳米TiO2半导体作为光催化材料的代表,以其较高的光敏性、化学稳定性和环境友好等诸多优点受到广泛关注;但由于纳米TiO2颗粒极易团聚,对有机物吸附量较低等缺点,限制了纳米TiO2光催化效率的提高。本文综述了以ZSM-5为载体,制备纳米TiO2/ZSM-5及金属阳离子改性后的M-纳米TiO2/ZSM-5和纳米TiO2/M-ZSM-5不同方法,归纳比较了各种制备方法的优缺点,阐述了以纳米TiO2/ZSM-5为主体的催化剂光催化降解有机物的研究现状。并指出提高纳米TiO2颗粒在载体上的均匀分散性,引入合适金属离子来增强对电子的吸引能力从而抑制空穴电子对的复合,是未来研究高效光催化剂的发展方向之一。
As a typical photocatalyst,TiO2 has been extensively investigated because of its fascinating high photosensitivity,chemical stability and environment-friendly character. However,nanoscale TiO2 particles are less efficient in photocatalysis due to its tendency of aggregation,leading to a limited adsorption capacity toward organic compounds. Different preparation methods of nanoTiO2 /ZSM-5 and metal modified nanoTiO2 /ZSM-5 particles,i.e. M-nanoTiO2 /ZSM-5 and nanoTiO2 /M-ZSM-5,are summarized regarding their objective composites. Recent advances of nanoTiO2 /ZSM-5 catalyst in the photocatalytic degradation of organic substances are reviewed. There is a good research prospect for highly efficient photocatalysts in improving uniform dispersion of nano TiO2 on support,and loading appropriate metal ions,which prevent the combination of hole-electron pairs by enhancing the attraction for electron.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2014年第1期85-91,123,共8页
Chemical Industry and Engineering Progress
基金
辽宁省教育厅科学技术项目(L2012188)
关键词
载体
光催化剂
制备
降解
support
photocatalysis
preparation
degradation
