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One-pot hydrothermal synthesis of MoS2-modified Mn0.5Cd0.5S solid solution for boosting H2 production activity under visible light

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Abstract

The development of low-cost and highly efficient photocatalysts with a visible-light-responsive feature for H2 production from water photosplitting is an interesting but challenging research topic. In this study, a series of MnxCd1−xS products (0 ≤ x ≤ 1.0) have been prepared by a facile hydrothermal method, and the resultant Mn0.5Cd0.5S solid solution exhibits the highest photocatalytic H2 production activity (286 μmol h−1), which is 1.83 times higher than that (156 μmol h−1) of single CdS under visible light (λ ≥ 420 nm) irradiation. After being modified with MoS2 via a one-pot hydrothermal process, the MoS2-modified Mn0.5Cd0.5S (MoS2/Mn0.5Cd0.5S) composites achieve remarkable improvement in their photocatalytic performance under λ ≥ 420 nm light irradiation, and the 0.5 wt% MoS2/Mn0.5Cd0.5S displays the highest H2 production activity (491 μmol h−1), which is much higher than that (286 μmol h−1) of pristine Mn0.5Cd0.5S and also slightly higher than that (417 μmol h−1) of 1.0 wt% Pt/Mn0.5Cd0.5S. The intimate interfacial contact between Mn0.5Cd0.5S nanoparticles and few-layer MoS2 cocatalysts formed during the one-pot hydrothermal process facilitates the electron transfer from Mn0.5Cd0.5S to MoS2, and thus promotes the photogenerated charge separation and provides more active sites for H2 evolution reaction. This work demonstrates that low cost and earth-abundant MoS2 as an effective cocatalyst can replace noble metals for visible-light-driven H2 production over MnxCd1−xS solid solutions.

Graphical abstract: One-pot hydrothermal synthesis of MoS2-modified Mn0.5Cd0.5S solid solution for boosting H2 production activity under visible light

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Publication details

The article was received on 02 Nov 2018, accepted on 07 Jan 2019 and first published on 08 Jan 2019


Article type: Paper
DOI: 10.1039/C8CY02266F
Citation: Catal. Sci. Technol., 2019, Advance Article
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    One-pot hydrothermal synthesis of MoS2-modified Mn0.5Cd0.5S solid solution for boosting H2 production activity under visible light

    P. Zeng, J. Luo, J. Wang and T. Peng, Catal. Sci. Technol., 2019, Advance Article , DOI: 10.1039/C8CY02266F

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