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Author(s): |
Juan Xiao, Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education, Central South University, Changsha 410083,P.R.China
Jie Li, Shenyang Aluminum & Magnesium Engineering & Research Institute, Shenyang 110001, P.R.China
Xuan Wang, Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education, Central South University, Changsha 410083,P.R.China
Wen-zhang Li, Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education, Central South University, Changsha 410083,P.R.China
Qi-yuan Chen, Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education, Central South University, Changsha 410083,P.R.China |
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Abstract: |
Visible light-responsive WO3 nanoporous films were prepared by anodization in neutral F-- -containing strong electrolytes, and the effect of anodic temperatures on the physical and photoelectrochemical properties of the WO3 nanoporous films were described. The morphologies, structures and chemical composition of the anodization WO3 films were investigated by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), energy dispersive X-ray spectrometer (EDS) and X-ray photoelectron spectroscopy(XPS) measurements. It turns out that nanoporous WO3 films with regular porous, having an average pore diameter of 100nm, were formed, and after annealing the WO3 films were single crystals oriented in the (002) direction. Moreover, the photoelectrochemical properties of WO3 nanoporous films under different temperatures were measured by photocurrent density curves and impedance spectra using a 500W Xenon lamp (IO=100 mW/cm2). The photocurrent of WO3 nanoporous film under the anodic temperature of 15℃ was measured at 6.70 mA/cm2, which proved beneficial to photoelectrochemical performance.
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