In-situ construction of N-doped Zn 0.6 Cd 0.4 S/oxygen vacancy-rich WO 3 Z-scheme heterojunction compound for boosting photocatalytic hydrogen production.

Autor: Dong Y; College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, PR China., Ma Y; College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, PR China., Shu A; Key Laboratory of Environment Biology and Pollution Control, College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China., Yan Z; College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, PR China., Wang H; Key Laboratory of Environment Biology and Pollution Control, College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China., Wu Y; College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, PR China. Electronic address: wu_yan@hunau.edu.cn.
Jazyk: angličtina
Zdroj: Journal of colloid and interface science [J Colloid Interface Sci] 2025 Jan 15; Vol. 678 (Pt A), pp. 1099-1108. Date of Electronic Publication: 2024 Sep 03.
DOI: 10.1016/j.jcis.2024.09.012
Abstrakt: Photocatalytic water splitting technology for H 2 production represents a promising and sustainable approach to clean energy generation. In this study, a high concentration of oxygen vacancies was introduced into tungsten trioxide (WO 3 ) to create a vacancy-rich layer. This modified WO 3 (WO 3-x ) was then combined with N-doped Zn 0.6 Cd 0.4 S through a hydrothermal synthesis, resulting in the formation of a Z-scheme heterojunction composite aimed at enhancing photocatalytic performance. Under visible light, the H 2 production activity of the composite reached an impressive 8.52 mmol·g -1 without adding co-catalyst Pt. This corresponds to enhancements of 7.82 and 4.39 times the production yield of pure ZCS and ZCSN, respectively. However, the hydrogen production increased to 21.98 mmol·g -1 when Pt was added as a co-catalyst. Furthermore, an array of characterizations were employed to elucidate the presence of oxygen vacancies and the establishment of the Z-scheme heterojunction. This structural enhancement significantly facilitates the utilization of photo-generated electrons while effectively preventing photo-corrosion of ZCSN, thus improving material stability. Our study provides a new scheme for the incorporation of oxygen-rich vacancy and the construction of Z-scheme heterojunction, demonstrating a synergistic effect that greatly advances photocatalytic performance.
Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Yan Wu reports financial support was provided by Projects of the National Nature Science Foundation of China (No. 22108069). Yan Wu reports financial support was provided by Projects of the Natural Science Foundation of Hunan Province (No. 2021JJ40260). If there are other authors, they declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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