关键词: TiO2/钛酸钾 ,   , 光催化  ,   , 罗丹明B    ,  ,  催化剂载体

Abstract: In order to investigate the decomposition function of photocatalytic technique to the organic contamination, a new carrier of catalyst was chosen. Sol-gel method was used to preparate TiO₂/potassium titanate photocatalyst. X-ray diffraction and SEM were used to token the product.   EDS shows that the main peak included Ti, O, K in potassium titanate whisker. The main peak of K disappeared and the peaks of Ti, O stayed after whisker was covered. It indicates that the surface of sample is covered by TiO₂. XRD shows that diffraction peak appeared, which is corresponded to the peak of anatase TiO₂. In the reaction device of photochemistry, using middle-pressure mercury lamp as illumination, rhodamine B as simulant pollutant, the photocatalytic performance of TiO₂/potassium titanate was studied. The decoloration rate of TiO₂/potassium titanate which was used to deal with rhodamine B in the experiment was influenced by the pH value, light intensity, reaction temperature, aeration amount, the dosage of catalyst etc. When the concentration of rhodamine B was 8 mg/L, the dosage of TiO₂/potassium titanate was 0.01 g/L. The decoloration rate of TiO₂/potassium titanate dealt with the rhodamine B reach over 95% in 160 minutes, and compared with TiO₂, the decoloration rate of rhodamine B was improved 0.50~1.91 multiple.

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