F-TiO_(2)催化剂制备及光催化降解罗丹明B废水研究

Preparation of F-TiO_(2)Catalyst and Photocatalytic Degradation of Rhodamine B Wastewater

以HF为F源,采用水热法合成了F改性的TiO_(2)催化剂,使用X射线粉末衍射仪和X射线光电子能谱仪表征了催化剂的结构;以罗丹明B为模拟染料废水,考察了外部环境对催化剂的光催化性能的影响。结果表明,F改性后在二氧化钛表面≡Ti-F和二氧化钛间隙F掺杂(Ti-O-F-Ti)。F-TiO_(2)催化剂对罗丹明B的降解率可达97%,适宜的pH和催化剂加量分别为7和9 g/L。F-TiO_(2)催化剂对甲基橙和亚甲基蓝染料废水也具有优异的降解性能。

F-modified TiO_(2)catalyst was synthesized by hydrothermal method using HF as F source.The structure of the catalyst was characterized by X-ray powder diffraction and X-ray photoelectron spectroscopy.The effect of external environment on the photocatalytic performance of the catalyst was investigated by using rhodamine B as simulated dye wastewater.Characterization analysis found that the results showed that F was doped on the surface of titanium dioxide and titanium dioxide interstitial(Ti-O-F-Ti)after modification.The photocatalytic performance showed that the degradation rate of rhodamine B by F-TiO_(2)catalyst could reach 97%,and the suitable pH and catalyst dosage were 7 and 9 g/L,respectively.The F-TiO_(2)catalyst also has excellent degradation performance for methyl orange and methylene blue dye wastewater.