异质结
材料科学
光催化
超快激光光谱学
电子转移
超短脉冲
苄胺
吸收(声学)
化学工程
光化学
光电子学
纳米技术
光谱学
光学
催化作用
化学
物理
量子力学
复合材料
工程类
激光器
生物化学
药物化学
作者
Chenxi Tang,Tengfei Bao,Shuming Li,Xuejing Li,Heng Rao,Ping She,Jun‐Sheng Qin
标识
DOI:10.1002/adfm.202415280
摘要
Abstract In the field of photocatalysis, ultrafast electron transfer at the interface is the key factor affecting photocatalytic activity. Herein, ultrafast carrier transport is achieved through constructing a Z‐scheme heterojunction of CoSe@Zn 0.5 Cd 0.5 S (CoSe@ZCS), which is prepared by in situ growth of ZCS on the ZIF‐67‐derived hollow CoSe. The ultrafast charge transfer at the Z‐scheme heterojunction interface is verified by advanced fs‐transient absorption, which provides vital evidence for the specific mechanism of photocatalytic charge transfer. In addition, the presence of key intermediates (*COOH and C═N) is detected by in‐situ FTIR spectroscopy, which further clarified the mechanism of coupling benzylamine oxidation with CO 2 photoconversion. DFT calculations also confirm that the Z‐scheme heterojunction effectively reduces the energy barrier of the rate‐limiting step of *COOH formation, facilitating the photocatalytic CO 2 reduction process of ZCS. Benefiting from the ultrafast electron transfer at the interface of the Z‐scheme heterojunction, CoSe@ZCS exhibits excellent bifunctional photocatalytic performance. This work lays the foundation for further exploration of the charge transfer mode at the heterojunction interface to facilitate solar‐driven energy conversion.
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