Abstract
This study focuses on the removal of the methyl orange (sodium p-dimethyl amino azo benzene sulfonate) of a representative dye compound in a liquid photo-system using nanometer-sized Zn-incorporated TiO 2 synthesized by a solvothermal method. The Zn-incorporated TiO 2 particles exhibited a mixed structure of anatase of TiO 2 and ZnTiO 3 with a particle size of below 20 nm. The absorbance was shifted to the higher wavelength on 2.0 mol% Zn-incorporated TiO 2 compared to pure TiO 2. In the XRD pattern, the structure of ZnTiO 3 was seen at 2 θ = 31.75. The XPS result of O 1s confirmed that 2.0 mol% Zn–TiO 2 had a higher hydrophilic property (Me–OH/Me–O = 0.46) than pure TiO 2 (Me–OH/Me–O = 0.25) did. Based on these results, the photodecomposition for methyl orange in liquid reaction was enhanced over Zn-incorporated TiO 2 compared with pure TiO 2: methyl orange of 10 ppm was completely decomposed after 120 min over 2.0 mol% Zn-incorporated TiO 2.
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