纳米TiO_2的制备及光催化性能

Process and Photo-catalysis of Nano-TiO_2 Powders Prepared by RF-PCVD Method

采用 RF- PCVD法 ,以 Ti Cl4 + O2 为反应体系 ,制备出了球状纳米级 Ti O2 粉体。经TEM,XRD,BET测试表明 ,粉体为锐钛型和金红石型的混晶体 ,粒径范围为 2 0～ 60 nm,平均粒径45 nm.苯酚降解实验表明 ,Ti O2 粉体具有明显的光催化活性 ,并就光催化效率与德国产 Ti O2 进行了比较。

With TiCl 4+O 2 reaction system, the nano TiO 2 powders, whose diameter is in the range of 20~60 nm, were prepared by radio frequency plasma chemical vapor deposition (RF PCVD). The character of the nano TiO 2 powders was determined by TEM, BET,XRD and size distribution tester. The measuring results show that the crystal structure is the mix type of anatase and rutile, the ratio of aggregated powders whose size is less than 116nm is 90 %. The catalytic activity of the nano TiO 2 powders, as photo catalyst, is substantial by photo catalysis experiment test. Compared with the ones bought from Germany, the photo catalytic effectiveness of them is about 82 %.