title: Photocatalytic reduction of Cr(VI) in aqueous solution using TiO₂ nanoparticles prepared with various alcohols as solvent.
abstract: TiO₂ nanoparticles were prepared with various linear alkyl chains of alcohols under a sol-gel process. The structure characterization and the photocatalytic reduction of hexavalent chromium of the TiO₂ nanoparticles were investigated. The phase transformation temperature, crystal aggregation and surface area of prepared TiO₂ samples were found to be strongly influenced by alcohol used. The phase transformation from anatase to rutile was retarded and the surface area was reduced for TiO₂ prepared with alcohols of longer alkyl chain. TiO₂ nanoparticles prepared with methanol or ethanol exhibited higher photocatalytic reduction activity of hexavalent chromium possibly due to greater and more positively charged surface area.
authors: Department of Chemical Engineering, National Taiwan University of Science and Technology, 43, Keelung Road, Section 4, Taipei 106, Taiwan. ku508@mail.ntust.edu.tw
authors: Young
authors: Y
authors: Ku
authors: Chia-Nan
authors: CN
authors: Lin
authors: Wei-Ming
authors: WM
authors: Hou
mesh_terms: D000438:Alcohols / Q000737:chemistry*; D002384:Catalysis; D002857:Chromium / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D053768:Metal Nanoparticles / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D055668:Photochemical Processes; D012997:Solvents / Q000737:chemistry; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
chemical_list: D000438:Alcohols; D012997:Solvents; D002857:Chromium; C009495:titanium dioxide; C074702:chromium hexavalent ion; D014025:Titanium