Fabrication of layered (CdS-Mn/MoS2/CdTe)-promoted TiO2nanotube arrays with superior photocatalytic properties.
A novel (CdS-Mn/MoS2/CdTe)-sensitized TiO2nanotube 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 TiO2NTAs (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).
College of Chemistry and Chemical Engineering, Hunan University of Arts and Sciences, Changde, Hunan Province 415000, China. Electronic address: huifeng_saint2000@163.com.
Hui
H
Feng
College of Chemistry and Chemical Engineering, Hunan University of Arts and Sciences, Changde, Hunan Province 415000, China.
Niu
N
Tang
College of Chemistry and Chemical Engineering, Hunan University of Arts and Sciences, Changde, Hunan Province 415000, China.
Songbai
S
Zhang
College of Chemistry and Chemical Engineering, Hunan University of Arts and Sciences, Changde, Hunan Province 415000, China.
Bo
B
Liu
State Key Lab of Chemo/Biosensing & Chemometrics, College of Chemistry & Chemical Engineering, Hunan University, Changsha 410082, China. Electronic address: qycai0001@hnu.edu.cn.
Qingyun
Q
Cai
Electrodeposite; Hydrothermal; MoS(2) nanosheet; Photocatalytic; SILAR; Stepwise level; TiO(2) NTAs