材料科学
异质结
光催化
X射线光电子能谱
催化作用
纳米颗粒
成核
纳米技术
化学工程
Atom(片上系统)
光化学
光电子学
化学
工程类
嵌入式系统
生物化学
有机化学
计算机科学
作者
S.V. Mohite,Shinik Kim,Ji‐Young Bae,Hee Jeong Jeong,Tae‐Woong Kim,Jihoon Choi,Yeonho Kim
出处
期刊:Small
[Wiley]
日期:2023-09-15
被引量:1
标识
DOI:10.1002/smll.202304393
摘要
Abstract Healed defects on photocatalysts surface and their interaction with plasmonic nanoparticles (NPs) have attracted attention in H 2 production process. In this study, surface oxygen vacancy (V o ) defects are created on ZnO (V o ‐ZnO) NPs by directly pyrolyzing zeolitic imidazolate framework. The surface defects on V o ‐ZnO provide active sites for the diffusion of single Au atoms and as nucleation sites for the formation of Au NPs by the in situ photodeposition process. The electronically healed surface defects by single Au atoms help in the formation of a heterojunction between the ZnO and plasmonic Au NPs. The formed Au/Vo‐Au:ZnO‐4 heterojunction prolongs photoelectron lifetimes and increases donor charge density. Therefore, the optimized photocatalysts of Au/V o ‐Au:ZnO‐4 has 21.28 times higher H 2 production rate than the pristine V o ‐ZnO under UV–visible light in 0.35 m Na 2 SO 4 and 0.25 m Na 2 SO 3 . However in 0.35 m Na 2 S and 0.25 m Na 2 SO 3 , the H 2 production rate is 25.84 mmole h −1 g −1 . Furthermore, Au/V o ‐Au:ZnO‐4 shows visible light activity by generating hot carries via induced surface plasmonic effects. It has 48.58 times higher H 2 production rate than pristine V o ‐ZnO. Therefore, this study infers new insight for defect healing mediated preparation of Au/V o ‐Au:ZnO heterojunction for efficient photocatalytic H 2 production.
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