压电光催化环境污染控制研究进展  

Research progress on environmental pollution control by piezo-photocatalysis

作　　者：李耀宇 李荣 黄宇[1,2] LI Yaoyu;LI Rong;HUANG Yu(Key Laboratory of Aerosol Chemistry and Physics,State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy of Sciences,Xi’an 710061,China;CAS Center for Excellence in Quaternary Science and Global Change,Xi’an 710061,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院地球环境研究所黄土与第四纪地质国家重点实验室中国科学院气溶胶化学与物理重点实验室,西安710061 [2]中国科学院第四纪科学与全球变化卓越创新中心,西安710061 [3]中国科学院大学,北京100049

出　　处：《地球环境学报》2022年第1期11-32,共22页Journal of Earth Environment

基　　金：国家重点研发计划(2016YFA0203000)。

摘　　要：光催化氧化技术具有操作简单、反应条件温和、清洁无二次污染等优点,已被广泛应用于各类污染物的去除。但是,低电荷载流子迁移率和电子空穴对的快速复合是限制光催化效率的关键问题。尽管通过掺杂、复合等方法能改善光催化氧化性能,但是在光催化材料的电子空穴对的分离效率仍然不高。为了解决这个问题,近年来越来越多的研究将极化电场的理论引入到光催化中,通过机械作用诱导压电材料产生的极化电场可以有效地分离光催化过程中产生的光生电子空穴对,显著提高光催化性能。本文详细介绍了压电光催化的基本原理及其影响因素,并根据不同材料体系综述了近年来压电光催化技术在污染物降解的研究进展。最后,对压电光催化的研究趋势和面临的挑战进行了展望。Background,aim,and scope Photocatalytic oxidation technology possesses the advantages of simple operation,mild reaction conditions,clean and no secondary pollution,and has been widely used in the removal of various pollutants.However,low charge carrier mobility and fast electron hole pair recombination are the key problems which limit the photocatalytic efficiency.Although the performance of photocatalytic materials has been improved by doping and compounding,the efficiency of electron hole pair separation is still insufficient.Based on this problem,numerous researches have introduced the theory of polarization electric field into photocatalysis.The polarization electric field induced by piezoelectric materials can effectively separate photoelectron hole pairs and significantly improve photocatalysis activity.In order to summarize the recent research on the degradation of pollutants in the field of piezo-photocatalysis,this paper reviews the material system and mechanism of the degradation of pollutants in the field of piezo-photocatalysis and put forward the future research trends and challenges.Materials and methods This paper summarizes the generation mechanism of piezo-photocatalysis and its influencing factors.Besides,different piezo-photocatalysis materials for pollutants degradation are reviewed.Results The basic principle of piezo-photocatalysis is to induce the separation of photogenerated electrons and holes through the polarization electric field generated by piezoelectric materials.The main factors affecting piezoelectric photocatalysis are morphology,size,structure(doping,oxygen vacancy)and many more.The piezo-photocatalytic degradation of pollutants is mainly concentrated in the liquid phase system,because the contact between the liquid and the catalytic materials is easier to stimulate the performance of the piezoelectric material.According to the material system,the piezo-photocatalytic degradation of pollutants can be mainly divided into single material system and composite material systems.The c

关 键 词：压电光催化 影响因素 污染物降解 反应机理 

分 类 号：X703[环境科学与工程—环境工程] O643.36[理学—物理化学]