大学化学2016，Vol.31Issue(6)：72-79,8.DOI:10.3866/PKU.DXHX201510022
光电子寿命与介电常数的关系及其对光催化效果的影响
Relationship between Photoelectron Lifetime and Dielectric Constant and Its Effect on the Photocatalysis
林则东 1戴玉华 1李可心1
作者信息
- 1. 南昌航空大学环境与化学工程学院，南昌330063
- 折叠
摘要
Abstract
In this article, the relationship equation between the photoelectron lifetime of the conduction band of photocatalyst and the dielectric constant of photocatalyst is derived. According to the photocatalytic mechanism and the derived equation, the relationship between the photocatalytic and the dielectric constant of the photocatalyst is elucidated as fol ows:the larger dielectric constant of the photocatalyst, the longer the photoelectron lifetime. Consequently, the transition of the photoelectrons from conduction band to the valence band to combine with the holes becomes harder through the stimulated emission and spontaneous emission, facilitating effective production of hydroxyl free radicals via the sufficient oxidation of hydroxyl ion and water by the holes occurring on the surface of photocatalyst.关键词
光催化效果/光电子寿命/介电常数Key words
Effect of photocatalysis/Photoelectron lifetime/Dielectric constant分类
化学化工引用本文复制引用
林则东,戴玉华,李可心..光电子寿命与介电常数的关系及其对光催化效果的影响[J].大学化学,2016,31(6):72-79,8.
