石墨烯构建Z型载流子转移通道的复合型光催化制氢材料

项目名称： 石墨烯构建Z型载流子转移通道的复合型光催化制氢材料

项目编号： No.51202105

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 无机非金属材料学科

项目作者： 王学文

作者单位： 南昌大学

项目金额： 25万元

中文摘要： 光催化制氢作为一种将太阳能转化为清洁能源-氢能的有效途径，日益受到科研工作者的广泛关注。在光催化材料中，虽然以Z型载流子转移为基础的复合型光催化材料可通过低能量光生载流子的转移复合保留强氧化还原能力的空穴和电子从而获得较高光催化制氢效率,然而在直接复合催化材料中载流子转移不可控，光催化效率难以提高。本项目将从调控复合型光催化材料中光生载流子转移出发，以能级结构匹配为基础，采用石墨烯在组元相间构建一个Z型的载流子转移通道，并调控组元相表面和界面的原子组态以及石墨烯的C/O比以获得高效的光催化制氢材料。该项目旨在研究复合型光催化材料中构建Z型载流子转移通道的基本方法，并探索复合光催化材料中载流子迁移状态和控制因素，以及深入研究其光催化制氢性能，为发展高效的复合型光催化制氢材料提供科学依据。

中文关键词： 石墨烯；Z-型；通道；光催化；氢

英文摘要： Photocatalytic hydrogen production as a direct route for converting solar energy to clean energy - hydrogen has been widely attracted researchers' attentions. In photocatalysts, the hybrid photocatalysts with a Z-scheme carrier transport route possess a significant advantage in improving photocatalytic activity via a lower energy carrier combination and then holding photoexcited electrons/holes with strong reducibility and oxidability. However, it is difficult in achieving a desired photoexcited carrier transport route in a hybrid photocatalyst. In the item, a hybrid photcatalyst with a Z-scheme carrier transport channel constructed by graphene is designed for dominating photoexcited carrier transport routes based on the energy band engineering, where the surface atom states and the ratio of C/O in graphene are modified for improving the carrier transport. The item will aim at developing a basic method to construct a Z-scheme carrier transport channel and exploring photoexcited carrier states and dominated conditions in a hybrid photocatalyst. And then the photocatalytic hydrogen activity will be further investigated. The results will promote the design of hybrid photocatalysts with high hydrogen production efficiency.

英文关键词： Graphene；Z-scheme；Channel；Photocatalysis；Hydrogen