F—TiO2光催化剂的制备及性能

TiO2具有化学稳定性好、成本低、耐腐蚀、无毒以及独特的光学、电学性质，纳米TiO2是目前最具应用前景的光催化剂。采用溶胶一凝胶法制备了F掺杂的TiO2光催化剂，用X-射线衍射（XRD）和紫外一可见光谱（UV—Vis）对其进行了表征，并通过降解甲基橙溶液来检测其光催化性能，研究了不同掺杂量、煅烧温度、煅烧时间等制备条件对F—TiO2光催化剂光催化性能的影响。结果表明，制备出的F-TiO2比未掺杂的TiO2具有较好的可见光响应，紫外光区响应并未受到影响。合成F—TiO2催化剂的最佳条件为F掺杂量为1．4％，煅烧温度600℃，煅烧时间2h。

Preparation and Properties of F-TiO2 Photocatalyst

TiO2 has good chemical stability, low cost, corrosion resistance, unique optics and electrical characters and it is non-toxic. The nano TiO2 is the most promising photocatalyst at present. The F-doped photocatalyst were prepared by sol-gel method, and characterized by X-ray diffraction （XRD） and ultraviolet-visible spectroscopy （UV-Vis）. The catalyst capability was detected by degradation of methyl orange solution. The effects of doping contents, calcination temperatures and time on the catalytic properties of F-TiO2 photocatalyst were investigated. The results indicated that the doped photocatalyst had better visible light response than the non-dopedone, and the response of doped photocatalyst in ultraviolet region was not affected. The optimized preparation conditions were listed as follows： the F-doped content was 1.4%, calcination temperature was 600℃ and calcination time was 2h.