Abstract: Solid super-acid nano-SO -TiO₂ powder photo-catalyst were prepared by the sol-gel method using Ti(OC₄H₉)₄ as raw material and adding 49% sulfuric acid into the original liquid. Then the SO /Ag-TiO₂ photo-catalyst was modified by AgNO₃. The prepared samples were characterized with UV-vis, IR, XRD and BET measurements. The photo-catalytic reactivity of samples was evaluated by using methyl orange and phenol aqueous solution as simulated contaminants. The results showed that the photo-catalytic reactivity of SO -TiO₂ was 10 times higher than that of unmodified TiO₂ and the photo-catalytic reactivity of SO /Ag-TiO₂ was even higher than that of P-25.

摘要： 以钛酸丁酯为原料，通过在TiO₂溶胶中添加质量分数为49%的硫酸，用溶胶–凝胶法制备了固体超强酸纳米光催化剂SO₄^2－-TiO₂，并在此基础上用硝酸银进行了改性。用XRD、IR、UV-vis、BET等手段对所制得的试样进行了表征，同时以甲基橙及苯酚的水溶液为模拟污染物，评价了样品的光催化性能，发现SO₄^2－-TiO₂的光催化活性最高可达单一TiO₂的10倍，SO /Ag-TiO₂的液相光催化活性超过P-25。