铁电材料光催化活性的研究进展

发布时间：2018-04-27 13:02

本文选题：铁电材料 + 铁电极化　；参考：《物理学报》2017年16期

【摘要】：光催化技术被认为是最有前景的环境污染处理技术,这就使得光催化剂材料备受瞩目.近年来,铁电材料作为新型光催化剂材料受到人们越来越多的关注,其原因在于铁电材料特有的自发极化有望解决催化反应过程中的电子-空穴对复合问题,进而提高光催化活性.本文从两个方面对铁电极化如何影响光催化进行综述:一方面,从铁电极化入手归纳总结其对电子-空穴对分离的影响,进而更深入地从极化引发的退极化场和能带弯曲两个部分来阐述具体的影响机理;另一方面,为了消除静电屏蔽,分别从温度、应力(应变)、电场三个外场因素调控极化入手,归纳总结外场调控极化对电子-空穴对分离的影响,进而影响光催化活性.最后对该领域今后的发展前景进行了展望.
[Abstract]:Photocatalytic technology is considered to be the most promising environmental pollution treatment technology, which makes photocatalyst materials attracted much attention. In recent years, more and more attention has been paid to ferroelectric materials as a new type of photocatalyst materials. The reason is that the spontaneous polarization of ferroelectric materials is expected to solve the electron-hole pair recombination problem in the catalytic reaction process. Thus, the photocatalytic activity is improved. In this paper, the influence of iron electrode on photocatalysis is reviewed in two aspects. On the one hand, the influence of iron electrode on the separation of electrons and holes is summarized. Furthermore, the specific influence mechanism is explained from two parts of depolarization field and band bending induced by polarization. On the other hand, in order to eliminate electrostatic shielding, polarization is regulated by three external field factors, temperature, stress (strain) and electric field, respectively. The effects of external field controlled polarization on the separation of electrons and holes were summarized, and then the photocatalytic activity was affected. Finally, the prospect of future development in this field is prospected.
【作者单位】：浙江工业大学机械工程学院特种装备制造与先进技术教育部/浙江省重点实验室;
【基金】：国家自然科学基金(批准号:11372280,11672269,51475424,51675485) 浙江省科技厅公益工业项目(批准号:2016C31041) 国家重点实验室开放基金(批准号:GZ15205)资助的课题~~
【分类号】：O643.361;O644.1

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