Department of Chemical Engineering, Tatung University, Taipei 10452, Taiwan.
Ultrason Sonochem. 2013 Jan;20(1):553-64. doi: 10.1016/j.ultsonch.2012.07.014. Epub 2012 Aug 8.
The combination of photocatalysis under visible light irradiation and sonolysis in the continuous system has been used to degrade an aqueous solution of phenol. ZnFe(2)O(4)/TiO(2)-GAC was employed as the photocatalysts which were obtained by sol-gel process and characterized by spectroscopic X-ray diffraction (XRD), scanning electron microscopy with energy dispersive X-ray microanalyses (SEM-EDX) and Brunauer-Emmett-Teller sorptometer (BET). It was observed that the rates of phenol degradation were affected by the initial pH value of phenol solution, salt addition, gas supplying and the recycling times of the recovered photocatalyst. The kinetic law for the phenol degradation can be apparently expressed as the first-order with respect to the concentration of phenol. Degradation of phenol solution in the continuous system, i.e., photocatalysis and sonolysis has synergistic effect in comparison with the photocatalytic reaction and sonolysis, respectively.
可见光照射下光催化与连续体系超声降解相结合，用于降解水溶液中的苯酚。采用溶胶-凝胶法制备的 ZnFe(2)O(4)/TiO(2)-GAC 作为光催化剂，并通过光谱 X 射线衍射（XRD）、带能谱 X 射线微分析（SEM-EDX）的扫描电子显微镜和 Brunauer-Emmett-Teller 吸附计（BET）进行了表征。结果表明，苯酚降解速率受苯酚溶液初始 pH 值、盐添加、气体供应和回收光催化剂的循环次数的影响。苯酚降解的动力学规律明显表现为与苯酚浓度呈一级关系。与光催化反应和超声降解相比，连续体系中苯酚溶液的降解，即光催化和超声降解具有协同作用。
