AgI/BiOI异质结光电催化甲醇氧化
AgI/BiOI Heterojunction Photoelectrocatalytic Methanol Oxidation
黄鹏伟 1李静 1林博 1王宜民 1陈仪 1谢楠耿1
作者信息
- 1. 揭阳职业技术学院化学工程系,广东 揭阳 522000
- 折叠
摘要
为提高BiOI光电催化甲醇氧化的效率,本研究采用简单的离子交换法制备了AgI/BiOI复合光催化剂.AgI的负载提高了甲醇氧化的效率,其中光还原时间为 10 min时,AgI/BiOI样品光电催化活性最高,甲醛的产率和法拉第效率分别达到0.952 μg·mL-1·h-1 和 53%.结果表明,AgI/BiOI复合材料光催化性能增强主要归因于异质结的构建,进而提高了光生载流子的分离效率.活性物种捕获实验揭示了甲醇氧化过程中的可能机理.
Abstract
In order to improve the efficiency of BiOI photoelectrocatalytic methanol oxidation,AgI/BiOI composite photocatalysts were prepared in this study using a simple ion-exchange method.The loading of AgI improved the efficiency of methanol oxidation,in which the highest photoelectrocatalytic activity of AgI/BiOI samples was observed at a photoreduction time of 10 min,and the formaldehyde yields and Faraday efficiencies reached 0.952 μg·mL-1·h-1 and 53%,respectively.The results indicate that the enhanced photocatalytic performance of the AgI/BiOI composites is mainly attributed to the construction of heterojunctions,which in turn improves the separation efficiency of the photogenerated carriers.The active species trapping experiments revealed a possible mechanism in the methanol oxidation process.
关键词
光电催化/甲醇氧化/BiOI/异质结Key words
photoelectrocatalysis/methanol oxidation/BiOI/heterojunction引用本文复制引用
出版年
2024
NETL
NSTL
万方数据