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.
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