提升铁电材料光催化性能的途径  

Ways to improve the photocatalytic performance of ferroelectric materials

作　　者：窦金东 陈龙斌 饶伟锋 张辉[1,2] 杨耀东 DOU Jindong;CHEN Longbin;RAO Weifeng;ZHANG Hui;YANG Yaodong(School of Mechanical and Automotive Engineering, Qilu University of Technology(Shandong Academy of Sciences), Jinan 250353, China;Shandong Mechanical Design and Research Institute, Jinan 250031, China)

机构地区：[1]齐鲁工业大学(山东省科学院)机械与汽车工程学院,济南250353 [2]山东省机械设计研究院,济南250031

出　　处：《功能材料》2022年第4期4097-4104,4110,共9页Journal of Functional Materials

基　　金：国家自然科学基金项目(51831010);济南市创新团队项目(2019GXRC035)。

摘　　要：光催化反应在降解有害污染物、转化温室气体、生产氢气、消灭有害菌等领域有重要的应用。近年来,具有自发极化的铁电材料被认为是一种新的候选者,其自发极化能产生内置电场,为光生载流子的传输提供驱动力。这一特性有望解决人们在光催化领域中所遇到的棘手问题:电子-空穴对的复合。也正因为具有这一特性,对铁电材料的光催化性能研究主要集中在了减少空穴和电子的复合。但实际上要提高光催化效率还需要通盘考虑整个催化过程,其中包括光子的吸收、光生电子空穴的分离迁移、终端反应这3个关键阶段。以上述光催化过程的三个阶段为着眼点,整理了近年的典型成果,梳理了在光催化的不同阶段提升铁电材料催化性能的有效手段,希望通过我们的总结能够为后续研究工作提供有益的参考。Photocatalytic reaction has important applications in the fields of degradation of harmful pollutants,conversion of greenhouse gases,production of hydrogen,elimination of harmful bacteria and so on.In recent years,ferroelectric materials with spontaneous polarization have been considered as a new candidate.Their spontaneous polarization can produce a built-in electric field and provide a driving force for the transmission of photogenerated carriers.This characteristic is expected to solve the thorny problem encountered in the field of photocatalysis,the recombination of electron hole pairs.Because of this characteristic,the research on the photocatalytic properties of ferroelectric materials mainly focuses on reducing the recombination of holes and electrons.But in fact,to improve the photocatalytic efficiency,we need to consider the whole catalytic process,including three key stages,photon absorption,separation and migration of photogenerated electron holes and terminal reaction.Focusing on the above three stages of photocatalytic process,this paper sorts out the typical achievements in recent years,and combs the effective means to improve the catalytic performance of ferroelectric materials in different stages of photocatalysis.It is hoped that our summary can provide a useful reference for the follow-up research work.

关 键 词：铁电材料 光催化 自发极化 掺杂改性 

分 类 号：TB321[一般工业技术—材料科学与工程]