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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摘要： 为考察光催化技术对有机污染物的降解作用,选择了一种新的催化剂载体,采用溶胶-凝胶法制备
了TiO ₂/钛酸钾晶须光催化剂。通过X-射线衍射、扫描电镜对产品进行了表征。EDS图谱显示,钛酸钾晶须的能
谱峰以Ti,O,K为主,而包覆后则以Ti,O 为主,K的谱峰已消失,说明晶须表面已被包覆上TiO ₂。XRD图谱中出
现了与锐钛型TiO ₂ 的特征峰相吻合的衍射峰。在光化学反应器中,以中压汞灯为光源,罗丹明B为底物,研究了
TiO ₂/钛酸钾的光催化性能。TiO ₂/钛酸钾催化剂对罗丹明B的脱色作用受pH 值、光照强度、反应温度、曝气量、催
化剂用量等因素的影响。当罗丹明B 质量浓度为8 mg/L 时,加入0.01g/L 的TiO ₂/钛酸钾,在160 min之内,
TiO ₂/钛酸钾对罗丹明B的脱色率达到95%以上,比TiO ₂ 单独处理提高了0.50~1.91倍。

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