光催化
异质结
材料科学
X射线光电子能谱
制氢
可见光谱
氢氧化物
化学工程
催化作用
光电子学
化学
生物化学
工程类
作者
Na Zhang,Yichao Wang,Meijie Liu,Tao Cheng,Zipeng Xing,Zhenzi Li,Wei Zhou
出处
期刊:Small
[Wiley]
日期:2024-03-29
被引量:1
标识
DOI:10.1002/smll.202400652
摘要
Abstract Designing a reasonable heterojunction is an efficient path to improve the separation of photogenerated charges and enhance photocatalytic activity. In this study, Cu 2‐x S@NiFe‐LDH hollow nanoboxes with core–shell structure are successfully prepared. The results show that Cu 2‐x S@NiFe‐LDH with broad‐spectrum response has good photothermal and photocatalytic activity, and the photocatalytic activity and stability of the catalyst are enhanced by the establishment of unique hollow structure and core–shell heterojunction structure. Transient PL spectra (TRPL) indicates that constructing Cu 2‐x S@NiFe‐LDH heterojunction can prolong carrier lifetime obviously. Cu 2‐x S@NiFe‐LDH shows a high photocatalytic hydrogen production efficiency (5176.93 µmol h −1 g −1 ), and tetracycline degradation efficiency (98.3%), and its hydrogen production rate is ≈10–12 times that of pure Cu 2‐x S and NiFe‐LDH. In situ X‐ray photoelectron spectroscopy (XPS) and electron spin resonance (ESR) provide proofs of the S‐scheme electron transfer path. The S‐scheme heterojunction achieves high spatial charge separation and exhibits strong photoredox ability, thus improving the photocatalytic performance.
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