Fabrication of layered (CdS-Mn/MoS₂/CdTe)-promoted TiO₂ nanotube arrays with superior photocatalytic properties

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• 作者：Hui Feng^a ; ^{huifeng_saint2000@163.com" class="auth_mail" title="E-mail the corresponding author} ; Niu Tang^a ; Songbai Zhang^a ; Bo Liu^a ; Qingyun Cai^b ; ^{qycai0001@hnu.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Stepwise level ; MoS2 nanosheet ; TiO2 NTAs ; Hydrothermal ; SILAR ; Electrodeposite ; Photocatalytic
• 刊名：Journal of Colloid and Interface Science
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：486
• 期：Complete
• 页码：58-66
• 全文大小：3378 K

文摘

A novel (CdS-Mn/MoS₂/CdTe)-sensitized TiO₂ nanotube arrays (NTAs) photoelectrode has been prepared by electrodeposite, successive ionic layer adsorption and reaction (SILAR) coupled with hydrothermal method. When a ZnS layer was added on the top of CdS-Mn/MoS₂/CdTe/TiO₂, a notable red-shift and high absorption was observed in the visible light region. The photocurrent density (mA/cm²) systematically increases from TiO₂ NTAs (0.43), CdTe/TiO₂ (1.09), MoS₂/CdTe/TiO₂ (1.80), CdS-Mn/MoS₂/CdTe/TiO₂ (2.40), to ZnS/CdS-Mn/MoS₂/CdTe/TiO₂ (3.41) under visible light irradiation, due to the type-II semiconductor heterostructures comprising multiple components with a staggered band offset. Such a heterostructure possesses an enhanced photocatalytic performance towards degradation of organic contaminant, e.g. P-Nitrophenol (PNP) and Rhodamine B (RhB).