In situ Integration of a Metallic 1T-MoS2/CdS Heterostructure as a Means to Promote Visible-Light-Driven Photocatalytic Hydrogen Evolution

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• 作者：Qin Liu ; Qichao Shang ; Adnan Khalil ; Qi Fang ; Shuangming Chen ; Qun He ; Ting Xiang ; Daobin Liu ; Prof. Qun Zhang ; Prof. Yi Luo and Prof. Li Song
• 刊名：ChemCatChem
• 出版年：2016
• 出版时间：August 22, 2016
• 年：2016
• 卷：8
• 期：16
• 页码：2614-2619
• 全文大小：1186K
• ISSN：1867-3899

文摘

The replacement of expensive noble-metals cocatalysts with inexpensive, earth-abundant, metallic nonmetal materials in most semiconductor-based photocatalytic systems is highly desirable. Herein, we report the fabrication of stable 1T-MoS₂ slabs in situ grown on CdS nanorods (namely, 1T-MoS₂@CdS) by using a solvothermal method. As demonstrated by ultrafast transient absorption spectroscopy, in combination with steady-state and time-resolved photoluminescence, the synergistic effects resulting from formation of the intimate nanojunction between the interfaces and effective electron transport in the metallic phase of 1T-MoS₂ largely contribute to boosting the photocatalytic activity of CdS. Notably, the heterostructure with an optimum loading of 0.2 wt % 1T-MoS₂ exhibits an almost 39-fold enhancement in the photocatalytic activity relative to that exhibited by bare CdS. This work represents a step towards the in situ realization of a 1T-phase MoS₂-based heterostructure as a promising cocatalyst with high performance and low cost.