中文摘要：

以TiCl4为钛源，采用简单易行的溶胶凝胶法低温制备锐钛矿型TiO2光催化剂。采用XRD、SEM、DRS和LRS等手段对所制备的锐钛矿型TiO2催化剂的结构进行了表征。通过光催化还原U(Ⅵ)效果研究了锐钛矿型TiO2光催化剂的光催化还原活性。结果表明，催化剂在紫外光区有较强的吸收，纳米锐钛矿型TiO2的吸收带边分别为398 nm，纳米TiO2样品的禁带宽度为3.14 eV。锐钛矿型TiO2对U(Ⅵ)的光催化还原活性可达到99%。为高效光催化还原技术处理低浓度含铀废水提供实验依据。

英文摘要：

In this paper, the anatase TiO2 was successfully synthesized using titaniumtetrachloride as raw material by hydrolyzing titania sol.The TiO2 catalyst was characterized by XRD, SEM, DRS and LRS. The photocatalytic activity of TiO2 was studied by reduction of U(VI).The results showed that the band gap absorption edge of TiO2 was 398 nm, which corresponded to the band gap energy of 3.14 eV. Thereduction rate (120 min) of the U(VI) by anatase TiO2 reached 99% under UV irradiation. It provides an experimental basis to deal with lowconcentration uranium by photocatalytic reduction technology.