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采用溶胶-凝胶法,以钛酸正丁酯为前驱物,无水乙醇为溶剂,冰醋酸为螯合剂,控制反应温度为40℃,pH=2~3,控制不同原料配比和煅烧温度,制备二氧化钛(TiO_2),及制备Cu~(2+)、Fe~(3+)、Zn~(2+)、Sr~(2+)、Na~+、Co~(2+)掺杂的TiO_2光催化剂,每种金属离子掺杂质量分数为0.2%。结果表明,最佳条件为钛酸正丁酯∶无水乙醇∶蒸馏水∶冰醋酸(体积比)=1∶10∶3∶1,煅烧温度为600℃;金属离子掺杂量相同的情况下,光催化降解甲基橙的顺序为:Fe-TiO_2>Cu-TiO_2>Na-TiO_2>CoTiO_2>Sr-TiO_2>TiO_2>Zn-TiO_2。
Using sol-gel method, n-butyl titanate as precursor, anhydrous ethanol as solvent and glacial acetic acid as chelating agent, the reaction temperature is controlled at 40 ℃ and pH = 2 ~ 3 to control the ratio of different raw materials and calcination temperature (TiO 2) and preparation of Cu 2+, Fe 3+, Zn 2+, Sr 2+, Na +, and Co 2+ TiO_2 photocatalyst, each metal ion doped mass fraction of 0.2%. The results showed that the optimum conditions were n-butyl titanate: absolute ethanol: distilled water: glacial acetic acid (volume ratio) = 1:10: 3:1, calcination temperature was 600 ℃. When the doping amount of metal ions was the same, The order of photocatalytic degradation of methyl orange was Fe-TiO 2> Cu-TiO 2> Na-TiO 2> CoTiO 2> Sr-TiO 2> TiO 2> Zn-TiO 2.