Journal
ELECTROCHIMICA ACTA
Volume 246, Issue -, Pages 1075-1081Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2017.06.153
Keywords
Bi2O3/TiO2 nano-tube arrays; Photoelectrode; Visible light; Photocatalysis; 4-chlorphenol
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Funding
- National Natural Science Foundation of China [51508254]
- Nature Science Foundation of Gansu Province of China [1506RJZA216]
- Jiangsu Engineering Technology Research Center of Environmental Cleaning Materials [KFK1502]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure [SKL201509SIC]
- Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lake, Chinese Academy of Sciences
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In order to improve the photocatalytic (PC) performance of TiO2 nano-material, TiO2 nanotube arrays (NTAs) was fabricated by anodization. Subsequently, Bi2O3 nano-particles were successfully deposited onto the surface of TiO2 NTAs through galvanostatic electrodeposition strategy. Afterwards, series of characterizations including scanning electron microscope (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS) and photoelectrochemical (PECH) measurements were applied to clarify physicochemical properties of the as-fabricated Bi2O3/TiO2 NTAs photoelectrode. All results indicated that the light absorbance and photoinduced charge separation efficiency of Bi2O3/TiO2 NTAs photoelectrode were significantly improved. As expected, Bi2O3/TiO2 NTAs photoelectrode displayed higher PC efficiency for degradation of 4-chlorphenol (4-CP) aqueous solution than that of pristine TiO2 NTAs. Besides these, the enhanced visible light PC mechanism was proposed. Furthermore, Bi2O3/TiO2 NTAs photoelectrode performed good reusability and stability even after six recycle utilization. (C) 2017 Elsevier Ltd. All rights reserved.
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