摘要
光催化技术是将太阳能转化为化学能的一种非常有效的能源转化方式,是解决能源危机和环境污染问题的一种重要方法。一些特殊形貌的光催化剂具有比表面积大、光生电子-空穴对复合率低及光能利用率高等优点。总结了不同形貌光催化剂(纳米线、纳米棒、纳米管、纳米片、核壳结构)的合成策略和光催化性能。经过对比后发现,利用水热法可以制备出多种特殊形貌的光催化剂,且所制备的光催化剂的催化性能优异。光催化剂的特殊形貌对其光催化性能提升的原因包括以下2个方面:1)可以提供更多的反应活性位点;2)提高光生电子-空穴对的分离效率。最后还提出了开发特殊形貌光催化剂的研究方向。
Photocatalytic technology can convert solar energy into chemical energy efficiently,so it is an important method to solve the energy crisis and environmental pollution.Some special-morphology photocatalysts have the advantages of large specific surface area,low photogenerated electron-hole pair recombination rate or high light energy utilization rate.This article summarizes the synthesis strategies and photocatalytic performance of photocatalysts with different morphologies(nanowires,nanorods,nanotubes,nanosheets,core-shell structures).Various photocatalysts with special morphologies can be prepared by the hydrothermal method and the prepared photocatalysts show excellent catalytic performance.The reasons for the improvement of their photocatalytic performance include the following two aspects:1)more reactive sites can be provided;2)the separation efficiency of photogenerated electron-hole pairs is improved.Finally,the research direction of developing photocatalysts with special morphologies is also put forward.
作者
鲍二蓬
张硕卿
邹吉军
徐强
Bao Erpeng;Zhang Shuoqing;Zou Jijun;Xu Qiang(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China)
出处
《化学工业与工程》
CAS
CSCD
北大核心
2021年第2期19-29,共11页
Chemical Industry and Engineering
基金
国家自然科学基金项目(21975180)。
关键词
光催化
特殊形貌
比表面积
分离效率
研究进展
photocatalysis
special morphology
specific surface area
separation efficiency
research progress
