高效光催化剂TiO_2/AC-M的制备及其对Cl_3CCOOH降解的研究

Preparation of Highly Efficient Photocatalyst TiO_2/AC-M and Its Catalytic Activity in C1_3CCOOH Degradation

用浓盐酸处理活性炭负载的二氧化钛(TiO2/AC),合成了光催化剂TiO2/AC-M,采用Sol-gel方法制备了纯TiO2光催化剂。选择较难降解的Cl3CCOOH作为探针分子,比较了TiO2/AC-M,TiO2/AC,纯TiO2 3种催化剂的催化活性。实验结果表明,TiO2/AC-M光催化剂的催化活性分别是TiO2/AC和纯TiO2光催化剂催化活性的2.08倍和3.18倍。同时还简单探讨了TiO2/AC-M光催化剂具有高催化活性的原因。

Photocatalysts TiO2/active carbon -M(TiO2/AC - M), TiO2/AC and pure TiO2 were prepared. Their catalytic activities were evaluated by photocatalytic degradation of trichloroacetic acid aqueous solution. Catalytic activity of TiO2/AC-M was 2.08 times of that of TiO2/AC and was 3.18 times of that of pure TiO2. The degradation mechanism shown in the case of the most active TiO2/AC-M was discussed. The catalytic activity of TiO2 can be significantly improved by employing active carbon as carrier and modifying TiO2 surface.