金属离子对纳米TiO2悬浊液的光催化性能影响的光谱研究

以钛氧有机物为前驱体,利用微乳液法制备了纳米TiO2微晶。用X射线衍射(XRD)和红外光谱(FTIR)等测试技术对产物进行了表征,并就纳米TiO2悬浊液中加入金属离子后光催化降解甲基橙溶液进行了初步的研究。光谱分析表明,纳米TiO2悬浊液中加入Bi3 离子后对甲基橙溶液的光催化降解有很大的促进作用,Bi3 与TiO2质量比为1∶8及TiO2的浓度为1.6g·L-1时光催化活性最佳。

Spectral Research on the Effect Various Metal Ions on the of Photocatalytic Degradation Properties of TiO2 Nanocrystal

TiO2 nanocrystalline was prepared by a emulsion method in the mixed solvent of cyclohexane and acetic anhydride using, titanyl organic compound as the precursor. The prepared product was characterized by means of X-ray diffraction (XRD) and Fourier transform infrared spectrum (FTIR). The photocatalytic oxidation of methyl orange with TiO2 loaded with various metal ions was discussed. The spectral research results showed that the photocatalytic reaction of methyl orange with TiO2 loaded with Bi3+ was promoted, some metal ions caused almost no promotion of TiO2 oxidation of methyl orange, and Ni2+ and Fe3+ ions caused a little promotion. The best mass proportion of Bi3+ and TiO2 was defined as 1:8, which has a good photocatalytic activity. The photocatalytic degradation reaction of methyl orange was affected by the concentration of TiO2 nanocrystal, and when the mass proportion of Bi3+ and TiO2 is 1:8, the best photocatalytic activity concentration of TiO2 is about 1.6 g x L(-1).