Sonophotocatalytic Degradation of Phenol under Visible Light Irradation

• Main Authors: Chih -Wen Yu, 尤志文
• Other Authors: Rong-Chi Wang
• Format: Others
• Language: en_US
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/14398543139690459776

碩士 === 大同大學 === 化學工程學系(所) === 98 === The sonophotocatalytic degradation of phenol under visible light irradiation combined with ultrasound was carried out in a glass reactor. 0.5%ZnFe2O4/TiO2-GAC was employed as the lower band gap 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). Sonophotocatalytic degradation of phenol has synergistic effect for phenol degradation in comparison with photocatalytic reaction. The kinetic law for the sonophotocatalytic degradation is determined to apparently the pseudo first-order with respect to the concentration of phenol. The rates of sonophotocatalytuc degradation are affected by the initial phenol pH value, salts addition, and gas supplying. The characteristics of photocatalysis under visible light irradiation would be reduced with the recycling time of the recovered photocatalyst.