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Frontiers in Energy

ISSN 2095-1701

ISSN 2095-1698(Online)

CN 11-6017/TK

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2018 Impact Factor: 1.701

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Front. Energy    2021, Vol. 15 Issue (3) : 752-759    https://doi.org/10.1007/s11708-021-0779-3
RESEARCH ARTICLE
In situ growth of a-few-layered MoS2 on CdS nanorod for high efficient photocatalytic H2 production
Wei CHEN(), Xiang LIU, Shaojie WEI, Qianqian HENG, Binfen WANG, Shilong LIU, Li GAO(), Liqun MAO
Henan Engineering Research Center of Resource and Energy Recovery from Waste, Henan University, Kaifeng 475004, China
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Abstract

An ultrathin MoS2 was grown on CdS nanorod by a solid state method using sulfur powder as sulfur source for photocatalytic H2 production. The characterization result reveals that the ultrathin MoS2 nanosheets loaded on CdS has a good contact state. The photoelectrochemical result shows that MoS2 not only are beneficial for charge separation, but also works as active sites, thus enhancing photocatalytic activity. Compared with pure CdS, the photocatalytic activity of MoS2 loaded CdS was significantly improved. The hydrogen evolution rate on m(MoS2): m(CdS) = 1: 50 (m is mass) reaches 542 μmol/h, which is 6 times of that on pure CdS (92 μmol/h). This work provides a new design for photocatalysts with high photocatalytic activities and provides a deeper understanding of the effect of MoS2 on enhancing photocatalytic activity.
Keywords photocatalytic H2 production      CdS      MoS2 cocatalyst      charge separation     
Corresponding Author(s): Wei CHEN,Li GAO   
Online First Date: 14 September 2021    Issue Date: 09 October 2021
 Cite this article:   
Wei CHEN,Xiang LIU,Shaojie WEI, et al. In situ growth of a-few-layered MoS2 on CdS nanorod for high efficient photocatalytic H2 production[J]. Front. Energy, 2021, 15(3): 752-759.
 URL:  
https://academic.hep.com.cn/fie/EN/10.1007/s11708-021-0779-3
https://academic.hep.com.cn/fie/EN/Y2021/V15/I3/752
Fig.1  Schematic illustration of the synthesis procedure to obtain MoS2/CdS nanorod.
Fig.2  XRD patterns of CdS, MoS2/CdS, and MoS2.
Fig.3  Comparison of CdS and MoS2 with m(MoS2): m(CdS) = 1: 50.
Fig.4  XPS spectra of m(MoS2): m(CdS) = 1: 100 nanorod.
Fig.5  HRTEM images of MoS2 loaded CdS.
Fig.6  Photocatalytic H2 evolution rates of MoS2 loaded CdS.
Photo-
catalyst		 Catalyst dosage
/mg		 Cocatalyst/(mass fraction, %) Preparation
method		 Sacrificial
reagent		 Light source H2 evolution rate/(μmol?h−1?g−1) Ref.
CdS 50 2.0% MoS2 Solid state (S powder) Lactic acid 300 W Xenon lamp, λ>420 nm 10840 This work
CdS 50 5% MoS2 Hydrothermal Amoxicillin 300 W Xenon lamp, λ>420 nm 1760 [10]
CdS 100 3% MoS2 Solid state (H2S) Lactic acid 300 W Xenon lamp, λ>420 nm 5330 [11]
CdS 300 1.0% NiS Hydrothermal Lactic acid 300 W Xenon lamp, λ>420 nm 7000 [8]
CdS 200 2% MoS2 Adsorption Lactic acid 300 W Xenon lamp, λ>420 nm 12950 [14]
CdS 20 25% MoS2 Hydrothermal TEOA 300 W Xenon lamp, λ>400 nm 1145 [19]
CdS 10 6.39% MoS2 Hydrothermal Na2S+ Na2SO3 300 W Xenon lamp, λ>420 nm 4540 [22]
Tab.1  Comparison of H2 evolution rates of the current work and previous studies
Fig.7  Photoelectrochemical performance of MoS2/CdS.
Fig.8  Mechanism of charge separation of MoS2/CdS.
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