Article Open Access

SnS2 Quantum Dots Decorated MoS2 Nanosheets Enabling Efficient Photocatalytic H2 Evolution in CO2 Saturated Water

Photocatalysis: Research and Potential. 2024, 1(1), 10003; https://doi.org/10.35534/prp.2023.10003
Xuelian Chen 1, 2,    Xi Luo 1,    Lei Liu 3,    Jing Ping 1,    Songmei Sun 1, 4, *   
1
Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
2
Shenhua (Beijing) New Materials Technology CO.LTD, CHN Energy Group, Beijing 102211, China
3
Center for Advanced Low-dimension Materials, Donghua University, Shanghai 201620, China
4
Shanghai Institute of Pollution Control and Ecological Security, 1239 Siping Road, Shanghai 200092, China
*
Authors to whom correspondence should be addressed.

Received: 13 Dec 2022    Accepted: 01 Mar 2023    Published: 03 Mar 2023   

Abstract

SnS2/MoS2 heterojunction nanocomposite was prepared by a one-step hydrothermal synthesis method. The nanocomposite exhibited much improved photocatalytic hydrogen evolution performance in CO2 saturated solution compared with pure MoS2 and SnS2 samples. The improved photocatalytic activity was attributed to the S-scheme heterojunction structure between SnS2 quantum dots and MoS2 nanosheets which facilitate electron-hole separation both in MoS2 and SnS2. In the S-scheme structure, the strong reduction ability of SnS2 quantum dots was well maintained for the improved H2 evolution. In situ DRIFT studies allowed us to suggest reaction pathways from CO2 and H2O to photocatalytic H2, CO, and CH4 generation.

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