以钛酸四丁酯为原料,常温下采用溶胶-凝胶法成功制得了纳米二氧化钛粉末,对其制备影响因素进行了研究。经试验结果表明：水和钛酸丁酯的摩尔比是3：1；冰醋酸与钛酸丁酯的摩尔比是0.5：1；无水乙醇与钛酸丁酯的摩尔比是20：1,pH取2~3时凝胶时间达到最佳值。并对试验制得的二氧化钛通过紫外光的照射,会对甲基橙溶液进行分解。在二氧化钛投入量为1.5 g/L,用紫外光照射10 mg/L的甲基橙溶液,4 h后甲基橙的降解率达到了92.9%,在该条件下二氧化钛的光降解效率达到了最高。%Using tetrabutyl titanate as raw materials,preparation nano titanium dioxide powder by u-sing sol-gel method successfully,the optimum process parameters were discussed in this paper. The test results show that the molar ratio of the water and butyl titanate is 3:1;The molar ratio of glacial acetic acid and butyl titanate is 0 . 5:1;Anhydrous ethanol and the molar ratio of butyl titanate is 20:1,pH of 2~3. And the test on decomposition of methyl orange solution of titanium dioxide by ul-traviolet irradiation. The test results show that titanium dioxide mass is 1. 5 g/L,10 mg/L of methyl orange solution,the degradation of methyl orange rate reached 92. 9% after four hours by using uv ir-radiation,under the condition of the highest photodegradation efficiency of titanium dioxide.
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