Citation: Ao-Yun Meng, Juan Li, Zhen-Hua Li, Guo-Yuan Xiong, Yan Sun, Zhen Li, Jin-Feng Zhang, Chun-Sheng Li. Enhanced photocatalytic hydrogen production and dichlorvos degradation via efficient charge transfer in Schottky-structured Bi/CdS_0.25Se_0.75-diethylenetriamine nanocomposites[J]. Chinese Chemical Letters, ;2026, 37(12): 111950. doi: 10.1016/j.cclet.2025.111950 shu

Enhanced photocatalytic hydrogen production and dichlorvos degradation via efficient charge transfer in Schottky-structured Bi/CdS_0.25Se_0.75-diethylenetriamine nanocomposites

Ao-Yun Meng ^{a, 1} ,
Juan Li ^{d, 1} ,
Zhen-Hua Li ^a ,
Guo-Yuan Xiong ^a ,
Yan Sun ^b ,
Zhen Li ^{a, b, c, e, *,} ,
Jin-Feng Zhang ^{f, *,} ,
Chun-Sheng Li ^{b, *,}

a.
College of Food Science and Engineering, Anhui Science and Technology University, Chuzhou 239000, China
b.
Key Laboratory of Advanced Electrode Materials for Novel Solar Cells for Petroleum and Chemical Industry of China, School of Chemistry and Life Sciences, Suzhou University of Science and Technology, Suzhou 215009, China
c.
Anhui Province Key Laboratory for Control and Application of Optoelectronic Information Materials, Anhui Normal University, Wuhu 241000, China
d.
School of Physics and Electronic Information Engineering, Ningxia Normal University, Guyuan 756000, China
e.
Anhui Province Key Laboratory of Functional Agriculture and Functional Food, Anhui Science and Technology University, Chuzhou 239000, China
f.
School of Physics and Electronic Information, Huaibei Normal University, Huaibei 235000, China

lizhen@ahstu.edu.cn

jfzhang@chnu.edu.cn

lichsheng@163.com

Received Date: 2 July 2025
Revised Date: 6 October 2025
Accepted Date: 12 October 2025
Available Online: 13 October 2025

Figures(4)

Industrialization and agricultural development urgently require sustainable energy solutions and pollutant removal strategies. Semiconductor photocatalysts can simultaneously achieve hydrogen production and environmental remediation. Building on previous studies, CdS_0.25Se_0.75 was combined with diethylenetriamine (DETA) to construct a novel organic–inorganic hybrid material (CdS_0.25Se_0.75–DETA (CSE)), thereby improving structural stability, suppressing photocorrosion, and enhancing interfacial charge transfer. Compared with conventional CdS-based inorganic photocatalysts, this hybridization strategy provides stronger interfacial coupling and more efficient carrier dynamics, underscoring the distinctiveness of this work. Subsequently, a Schottky-structured Bi/CSE nanocomposite was fabricated by in-situ reducing BiOBr to metallic Bi and integrating with CSE, combining the advantages of organic–inorganic hybridization and Schottky junctions. Experimental results reveal that this structure effectively promotes electron transfer and charge separation while suppressing recombination. The Bi/CSE nanocomposite exhibits excellent performance in hydrogen evolution and dichlorvos degradation. With 1% Bi precursor loading, 1-Bi/CSE achieves a hydrogen evolution rate of 5.6 mmol g^-1 h^-1, 3.1 times higher than pristine CSE (1.8 mmol g^-1 h^-1), while maintaining stable performance over five cycles (10 h). 20-Bi/CSE (20% Bi precursor loading) degrades 85.2% of dichlorvos within 80 min, outperforming pristine Bi (58.9%) and CSE (47.6%), and remains highly active throughout five cycles (400 min). The enhanced performance arises from the synergistic effect of the organic–inorganic hybrid matrix and the Bi–CSE Schottky junction, as verified by Kelvin probe force microscopy (KPFM), X-ray photoelectron spectroscopy (XPS), femtosecond transient absorption spectroscopy (fs-TAS), and theoretical calculations. This study demonstrates, for the first time, that integrating Schottky structures with DETA modification enables a dual-functional photocatalyst for both hydrogen evolution and organophosphorus pesticide degradation, providing a new strategy for the design of multifunctional photocatalysts.
- Photocatalysts,
- Hydrogen evolution,
- Dichlorvos degradation,
- Organic–inorganic hybrid,
- Schottky-structured
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Enhanced photocatalytic hydrogen production and dichlorvos degradation via efficient charge transfer in Schottky-structured Bi/CdS0.25Se0.75-diethylenetriamine nanocomposites

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通讯作者: 陈斌, bchen63@163.com

Enhanced photocatalytic hydrogen production and dichlorvos degradation via efficient charge transfer in Schottky-structured Bi/CdS_0.25Se_0.75-diethylenetriamine nanocomposites