摘要
以钛酸四丁酯为钛源,乙醇和丙三醇混合液为溶剂,采用醇热法制备球形二氧化钛(TiO_2)。考察了丙三醇的用量对产物结构和性能的影响。以盐酸四环素为目标物,考察了制得的纳米TiO_2的光催化活性。研究结果表明:丙三醇与乙醇的体积配合比1∶0.2制得的球形纳米TiO_2对盐酸四环素的光催化降解效果最佳,在纳米TiO_2光催化剂投加量为1g/L,盐酸四环素为0.1g/L,紫外光或模拟太阳光照2h条件下,对盐酸四环素的降解率分别达到98.58%和90.00%。
The spherical TiO_2 was prepared by the glycol-thermal method,using tetra-butyl titanate as the titanium source,ethanol and glycerol as solvent.The influence of the ratio of glycerol on the structure and performance of products was investigated.The photocatalytic activity of TiO_2 was studied by photocatalytic degradation of tetracycline hydrochloride.The results indicated that the spherical nano TiO_2,prepared by the volume ratio of glycerol to ethanol 1∶0.2 showed the optimal photocatalysis.When the dosage of nano-TiO_2 was 1 g/L and the concentration of tetracycline hydrochloride was 0.1 g/L,the degradation rate of tetracycline hydrochloride could reach to 98.58% and90.00% under ultraviolet light or simulated sunlight for 2 h,respectively.
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