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Title: Research on the effect of crystal structures on W-TiO{sub 2} nanotube array photoelectrodes by theoretical and experimental methods

W-doped/undoped TiO{sub 2} nanotube array (TNAs) photoelectrodes with different nanostructures were successfully fabricated using the anodization method. Their morphology and characteristics were studied using scanning electron microscopy (SEM), energy dispersive X-ray (EDX), and ultra violet/visible light diffuse reflectance spectra (UV/vis/DRS). Their electronic structure and optical properties were studied by means of first-principle. Photocatalytic (PC) performance of W-TNAs photoelectrodes with different crystal structures was evaluated using the decomposition rates of Rhodamine B (Rh.B) under xenon light illumination. The results demonstrated that W substituting Ti broadened the width of conduction band (CB) and valence band (VB) of anatase and rutile TiO{sub 2}, reduced the band gap of rutile TiO{sub 2} and even caused its red-shift. W incorporated into TNAs photoelectrodes extended light absorption threshold and enhanced its utilization of solar light and PC activity, particularly, the PC performance of W-TNAs photoelectrodes with mixed crystal and rutile crystal structure.
Authors:
 [1] ;  [2] ; ;  [1] ;  [3] ;  [4]
  1. College of Resource and Environment, Qingdao Agricultural University, Changcheng Road 700, Chengyang District, Qingdao 266109 (China)
  2. (SKLUWRE), Department of Environmental Science and Engineering Harbin Institute of Technology, Huanghe Road 73, Nangang District, Harbin 150090 (China)
  3. State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), Department of Environmental Science and Engineering Harbin Institute of Technology, Huanghe Road 73, Nangang District, Harbin 150090 (China)
  4. Library, Qingdao Agricultural University, Changcheng Road 700, Chengyang District, Qingdao 266109 (China)
Publication Date:
OSTI Identifier:
22218103
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 114; Journal Issue: 8; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; ANODIZATION; CHELATING AGENTS; CRYSTAL STRUCTURE; DOPED MATERIALS; ELECTRONIC STRUCTURE; NANOTUBES; PHOTOCATALYSIS; RED SHIFT; REFLECTIVITY; RUTILE; SCANNING ELECTRON MICROSCOPY; TITANIUM OXIDES; TUNGSTEN; ULTRAVIOLET SPECTRA; VISIBLE RADIATION; VISIBLE SPECTRA; X RADIATION; XENON