Enhanced photocatalytic H<sub>2</sub> generation and Cr(<scp>vi</scp>) reduction by a sheet-on-sheet Cd(OH)<sub>2</sub>/CdS nanocomposite
The advancement of efficient photocatalysts is essential for tackling global energy and environmental issues. In this work, a unique sheet-on-sheet Cd(OH)<sub>2</sub>/CdS photocatalyst was synthesized <i>via</i> a facile solution strategy, demonstrating significantly improved photocatalytic performance for H<sub>2</sub> generation and Cr(VI) reduction. The optimal 5% Cd(OH)<sub>2</sub>/CdS obtained an impressive H<sub>2</sub> production rate of 3475 μmol g<sup>-1</sup> h<sup>-1</sup> under visible light, marking a 6.3 times increase compared to CdS. Additionally, the kinetics of Cr(VI) reduction were markedly accelerated, with a rate constant of 0.2803 min<sup>-1</sup>, representing a 5.7 times improvement over pure CdS. Moreover, the 2D/2D Cd(OH)<sub>2</sub>/CdS photocatalyst exhibited exceptional stability, maintaining high photocatalytic activity over multiple reaction cycles. Experimental findings and DFT calculations revealed the charge transfer mechanism between CdS nanosheets and Cd(OH)<sub>2</sub> cocatalyst. This work provides insights into designing high-performance CdS-based nanophotocatalysts for water splitting and environmental remediation.
Authors
- Deqian Zeng (ORCID: https://orcid.org/0000-0001-7542-1297)
- Yimin Liu (ORCID: https://orcid.org/0000-0001-5281-7424)
- Xinpeng Wang (ORCID: https://orcid.org/0000-0002-0580-3895)
- Yanbin Li (ORCID: https://orcid.org/0000-0002-4142-7743)
- Yuezhou Wei
- Zhao Wei (ORCID: https://orcid.org/0009-0002-2554-4031)
- Yuxiang Yang (ORCID: https://orcid.org/0009-0007-7855-933X)
Institutions
- Guangxi University (CN)
- University of South China (CN)
Publication Details
- Journal
- Nanoscale
- Published
- 2025-01-01
- DOI
- https://doi.org/10.1039/d5nr00215j
- Citations
- 3
- Primary Topic
- Advanced Photocatalysis Techniques
- Type
- article
- Field-Weighted Citation Impact
- 1.09