双功能
光催化
材料科学
异质结
苄胺
分解水
制氢
光激发
贵金属
电子转移
介孔材料
光化学
化学工程
氢
金属
催化作用
化学
光电子学
物理
有机化学
核物理学
冶金
激发态
工程类
作者
Jianan Liu,Xuefeng Sun,Yu Fan,Yaoguang Yu,Qi Li,Jing Zhou,Huiquan Gu,Keying Shi,Baojiang Jiang
出处
期刊:Small
[Wiley]
日期:2023-10-24
卷期号:20 (10)
被引量:1
标识
DOI:10.1002/smll.202306344
摘要
The coupling of photocatalytic hydrogen production and selective oxidation of benzylamine is a topic of significant research interest. However, enhancing the bifunctional photocatalytic activity in this context is still a major challenge. The construction of Z-scheme heterojunctions is an effective strategy to enhance the activity of bifunctional photocatalysts. Herein, a p-n type direct Z-scheme heterojunction CuS/TiO2 is constructed using metal-organic framework (MOF)-derived TiO2 as a substrate. The carrier density is measured by Mott-Schottky under photoexcitation, which confirms that the Z-scheme electron transfer mode of CuS/TiO2 is driven by the diffusion effect caused by the carrier concentration difference. Benefiting from efficient charge separation and transfer, photogenerated electrons, and holes are directedly transferred to active oxidation and reduction sites. CuS/TiO2 also exhibits excellent bifunctional photocatalytic activity without noble metal cocatalysts. Among them, the H2 evolution activity of the CuS/TiO2 is found to be 17.1 and 29.5 times higher than that of TiO2 and CuS, respectively. Additionally, the yields of N-Benzylidenebenzylamine (NBB) are 14.3 and 47.4 times higher than those of TiO2 and CuS, respectively.
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