光催化
量子产额
材料科学
X射线光电子能谱
量子点
气凝胶
碳纤维
产量(工程)
多孔性
纳米技术
高分辨率透射电子显微镜
透射电子显微镜
化学工程
复合数
化学
光学
复合材料
物理
催化作用
荧光
有机化学
工程类
作者
Hang Zhang,Yuanli Li,Lichun Deng,Jiaxing Zhong,Zhenghan Zhang,Yihong Zhang,Chunqiang Zhuang
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2023-06-22
卷期号:6 (13): 7274-7282
被引量:4
标识
DOI:10.1021/acsaem.3c00992
摘要
The design of photocatalysts plays a central role in determining the photocatalytic H2 yield. Here, we used a design strategy that is different from conventional methods to prepare our photocatalytic systems. Large porous carbon aerogels (CA) with rich surface areas were used to receive photogenerated electrons. TiO2 quantum dots were used as photocatalysts and anchored on large porous CAs to form CA@TiO2 systems. The H2 yield of the optimized CA@TiO2 composite is ∼2.1 mmol/g, ∼11 times higher than that of pure TiO2 quantum dots. High-resolution X-ray photoelectron spectroscopy and high-angle annular dark-field scanning transmission electron microscopy demonstrate that the photogenerated electrons can be easily transferred from TiO2 quantum dots to porous CAs. Thus, efficient charge separation can be realized for the succeeding highly efficient H2 evolution. Our results here provide a different way from conventional methods to design photocatalytic systems with high H2 yield.
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