活性炭负载纳米二氧化钛的制备及其光催化性能

Preparation of nanometer TiO_2 doped with activated carbon and its photo-catalytic activity

通过特殊液相沉淀法制备出纳米二氧化钛粉体,利用二氧化钛的催化性能及活性炭的分散性能,通过浸渍法得到活性炭负载的纳米二氧化钛,探究此催化剂在自然光照射下对工艺模拟废水——酸性品红溶液的降解率。探讨不同的复合比例、催化剂的投入量对光催化效率的影响以及催化剂回收再利用问题。结果表明,二氧化钛与活性炭质量比为2:1时的催化效果最好,对于160 m L质量浓度为10 mg/L的酸性品红溶液投入该催化剂1 g时催化效果最好,在50 min后,降解率达到98%,回收再利用的催化剂在50 min内降解率达到97%,与第一次的降解率相近。

By using special liquid precipitation method,nano titanium dioxide powder is prepared.Using the dispersing performance of the catalytic performance of TiO2 and activated carbon,the immersion method is used to obtain the nano-titanium dioxide dope with activated carbon. The catalyst for the inquiry process waste-water in natural light—the degradation rate of acid fuchsin solution is explored. Different composite propor-tions,adding amount of catalyst,catalyst recovery and recycling problems are discussed. The results show that the catalytic effects is the best when the proportion of titanium dioxide and activated carbon is 2：1.For 160 mL acid fuchsin solution with concentration of 10 mg/L,the catalytic effect is the best when adding 1 g catalyst. 50 min later,the degradation rate is 98%. The degradation rate of recovery and recycling catalyst reaches 97%in 50 mins,which is similar with the first degradation rate.