Citation: Shanchi Liu, Kai Wang, Mengxue Yang, Zhiliang Jin. Rationally Designed Mn_0.2Cd_0.8S@CoAl LDH S-Scheme Heterojunction for Efficient Photocatalytic Hydrogen Production[J]. Acta Physico-Chimica Sinica, ;2022, 38(7): 210902. doi: 10.3866/PKU.WHXB202109023 shu

Rationally Designed Mn_0.2Cd_0.8S@CoAl LDH S-Scheme Heterojunction for Efficient Photocatalytic Hydrogen Production

Shanchi Liu ^{1, 2, 3, †} ,
Kai Wang ^{1, 2, 3,,} ,
Mengxue Yang ^{1, 2, 3, †} ,
Zhiliang Jin ^{1, 2, 3,,}

1.
School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan 750021, China
2.
Ningxia Key Laboratory of Solar Chemical Conversion Technology, North Minzu University, Yinchuan 750021, China
3.
Key Laboratory for Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan 750021, China

Corresponding author: Kai Wang, kaiwang@nun.edu.cn Zhiliang Jin, zl-jin@nun.edu.cn

^†

Received Date: 15 September 2021
Revised Date: 12 October 2021
Accepted Date: 29 October 2021
Available Online: 2 November 2021
Fund Project: the Natural Science Foundation of Ningxia Province 2021AAC03225the Fundamental Research Funds for the Central Universities of North Minzu University 2020KYQD29

Constructing an efficient and stable heterojunction photocatalyst system is a promising approach to achieve solar-driven water splitting to produce hydrogen. In this work, a novel Mn_0.2Cd_0.8S@CoAl LDH (MCCA) S-scheme heterojunction was successfully prepared through the efficient coupling of Mn_0.2Cd_0.8S nanorods and CoAl LDH nanosheets, employing a physical mixing method. The photoluminescence and photocurrent-time response results demonstrated that the internal electric field of the constructed MCCA S-scheme heterojunction could successfully accelerate charge separation and electron transfer between the Mn_0.2Cd_0.8S interface and the CoAl LDH. Critically, the introduction of the CoAl LDH effectively inhibited the recombination of photogenerated electrons and holes, thereby improving the photocatalytic hydrogen production activity of Mn_0.2Cd_0.8S. A maximum H₂ production of 1177.9 μmol in 5 h was obtained with MCCA-3. This represents a significant improvement compared to what can be achieved with the pure Mn_0.2Cd_0.8S nanorods and CoAl LDH nanosheets individually. This work provides a simple and effective approach for the rational design of S-scheme heterojunction photocatalysts for photocatalytic hydrogen production.
- Mn_0.2Cd_0.8S,
- CoAl LDH,
- S-scheme heterojunction,
- Photocatalytic H₂ production
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Rationally Designed Mn0.2Cd0.8S@CoAl LDH S-Scheme Heterojunction for Efficient Photocatalytic Hydrogen Production

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Rationally Designed Mn_0.2Cd_0.8S@CoAl LDH S-Scheme Heterojunction for Efficient Photocatalytic Hydrogen Production