Citation: Zhen-Wei Zhang, Qiu-Hao Li, Xiu-Qing Qiao, Dongfang Hou, Dong-Sheng Li. One-pot hydrothermal synthesis of willow branch-shaped MoS₂/CdS heterojunctions for photocatalytic H₂ production under visible light irradiation[J]. Chinese Journal of Catalysis, ;2019, 40(3): 371-379. doi: 10.1016/S1872-2067(18)63178-X shu

One-pot hydrothermal synthesis of willow branch-shaped MoS₂/CdS heterojunctions for photocatalytic H₂ production under visible light irradiation

College of Materials and Chemical Engineering, Hubei Provincial Collaborative Innovation Center for New Energy Microgrid, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang 443002, Hubei, China

Received Date: 8 August 2018
Revised Date: 25 September 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (51502155, 51572152, 21673127, 21671119), the Research Project of Hubei Provincial Department of Education (D20151203), and the State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (20170020).

Willow branch-shaped MoS₂/CdS heterojunctions are successfully synthesized for the first time by a facile one-pot hydrothermal method. The as-prepared samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, nitrogen adsorption-desorption measurements, diffuse reflectance spectroscopy, and photoelectrochemical and photoluminescence spectroscopy tests. The photocatalytic hydrogen evolution activities of the samples were evaluated under visible light irradiation. The resulting MoS₂/CdS heterojunctions exhibit a much improved photocatalytic hydrogen evolution activity than that obtained with CdS and MoS₂. In particular, the optimized MC-5 (5 at.% MoS₂/CdS) photocatalyst achieved the highest hydrogen production rate of 250.8 μmol h^-1, which is 28 times higher than that of pristine CdS. The apparent quantum efficiency (AQE) at 420 nm was 3.66%. Further detailed characterizations revealed that the enhanced photocatalytic activity of the MoS₂/CdS heterojunctions could be attributed to the efficient transfer and separation of photogenerated charge carriers resulting from the core-shell structure and the close contact between MoS₂ nanosheets and CdS single-crystal nanorods, as well as to increased visible light absorption. A tentative mechanism for photocatalytic H₂ evolution by MoS₂/CdS heterojunctions was proposed. This work will open up new opportunities for developing more efficient photocatalysts for water splitting.
- CdS,
- MoS₂,
- Photocatalysis,
- Water splitting,
- H₂ evolution,
- Heterojunction,
- Core-shell structure,
- Visible light
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

One-pot hydrothermal synthesis of willow branch-shaped MoS2/CdS heterojunctions for photocatalytic H2 production under visible light irradiation

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通讯作者: 陈斌, bchen63@163.com

One-pot hydrothermal synthesis of willow branch-shaped MoS₂/CdS heterojunctions for photocatalytic H₂ production under visible light irradiation