Al-TiO_(2)负载型光催化剂的制备、表征及对邻苯二甲酸酯的光催化活性

Preparation and Characterization of Al-doped TiO_(2) and Its Photocatalytic Activity Photocatalyst for Phthalate Esters

以钛酸四丁酯为钛源、十八水硫酸铝为铝源,利用溶胶-凝胶技术合成了Al掺杂的TiO_(2)天然矿石球材料,并利用XRD、SEM、UV-Vis手段对催化剂的结构、形貌、空隙大小和光催化性能进行表征。结果表明:适量Al的掺杂使TiO_(2)吸收边缘发生红移,提高了可见光光催化活性。对初始质量浓度为100 ug·L^(-1)的6种邻苯二甲酸酯进行催化降解6 h后,其降解率达到90%左右。

Using tetrabutyl orthotitanate (TBOT) as Ti source and KAl(SO4)2·12H2O as Al source,Al-doped TiO_(2)natural ore ball material was synthesized via sol-gel method.The structure,morphology,pore size and photocatalytic activity of the as-prepared samples were characterized by X-ray diffractometry,scanning electron microscope and UV-Vis-DRS.The experimental results showed that the appropriate amount of Al doping made the absorption edge shift towards the longer wavelength side,which promoted visible light photocatalytic activity of TiO_(2).The degradation ratio was about 90% during the photodegradation of six phthalate esters with the initial mass concentration of 100μg·L^(-1)for 6 h.