Carbon-nanodot-coverage-dependent photocatalytic performance of carbon nanodot/TiO2 nanocomposites under visible light

作     者：孙明烨 郑友进 张蕾 赵立萍 张冰 

作者机构：School of Physics and Electronic Engineering Mudanjiang Normal University Mudanjiang 157011 China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2017年第26卷第5期

页      面：386-391页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：Project supported by the Scientific Research Starting Fund for Doctor of Mudanjiang Normal University,China(Grant No.MNUB201508) the Youth Science Foundation of Heilongjiang Province,China(Grant No.QC2016007) the National Natural Science Foundation of China(Grant No.61604065) 

主　　题：photocatalytic coverage visible realization photocatalyst conduction moderate irradiation attributed limits 

摘      要：Carbon nanodots（CDs） with visible absorption band and TiO2 are integrated to enhance the photosensitivity of *** CD/TiO2 nanocomposites show obvious CD-coverage-dependent photocatalytic performance. The CD/TiO2 nanocomposites with moderate CD coverge exhibit the highest photocatalytic activity after being irradiated with visible light, which is more excellent than that of TiO2. Too little CD coverage could result in poor visible light absorption, which limits the photocatalytic performance of CD/TiO2 nanocomposites. While, too much CD coverage weakens the photocatalytic activity of CD/TiO2 nanocomposites by restraining the extraction of conduction band electrons within TiO2 to generate active oxygen radicals and the electron transfer（ET） process from CDs to TiO2. These results indicate that rational regulation of CD coverage and the realization of efficient ET process are important means to optimize the photocatalytic performance of CD/TiO2 nanocomposites.