1. One–dimensional shell-core nanorods of NiO@Cd0·75Zn0·25S as Schottky junction photocatalyst with rich sulfur vacancies for enhanced photocatalytic H2 evolution.
- Author
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Wu, Yuehan, Liu, Jisheng, Rong, Jian, Zhang, Yuzhe, Liang, Qian, Zhou, Man, Li, Zhongyu, and Xu, Song
- Subjects
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HYDROGEN evolution reactions , *NANORODS , *SULFUR , *N-type semiconductors , *QUANTUM efficiency , *DENSITY functional theory - Abstract
Photocatalytic hydrogen evolution reaction is one of the remarkable methods to produce clean and renewable fuel. However, the application of photocatalysts is still restricted because of the high recombination rate of photo-excited carriers and low photocatalytic activity. Herein, one-dimensional shell-core Schottky junction NiO@Cd 0·75 Zn 0·25 S composite nanorods have been synthesized successfully by self-assembly growing on the surface of Cd 0·75 Zn 0·25 S (CZS) nanorods with rich sulfur vacancies. The improved photocatalyst NiO@Cd 0·75 Zn 0·25 S sample (CN-0.15) exhibits a highly efficient photocatalytic hydrogen evolution rate of 745.41 μmol h−1 with 5 mg photocatalyst (corresponding to 149.1 mmol g−1 h−1) and apparent quantum efficiency (AQE) 12.5% at 420 nm, which is 5 times higher than that of pure CZS. Series results of characterizations and density functional theory (DFT) calculation provide a novel strategy for constructing Schottky junction by multi-step interfacial and defect engineering for H 2 evolution. [Display omitted] • A shell-core NiO@Cd 0·75 Zn 0·25 S with rich sulfur vacancies was synthesized. • NiO@Cd 0·75 Zn 0·25 S nanorods boosted hydrogen evolution rate and high AQE. • DFT calculation showed sulfur vacancy promotes photogenerated carrier separation. • Propose construction of schottky junction with metal and n-type semiconductor. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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