Preparation and Performances of RuO2/TiO2 Films Photocatalyst Supported on Float Pearls
RuO2/TiO2 films were deposited on float pearls (FP) by the sol-gel-dipping method. The substrates were coated with RuO2/TiO2 precursor sol, air-dried at 120℃ and further heated at 500℃ to obtain the coupled photocatalyst of RuO2/TiO2 films supported on FP (RuO2/TiO2/FP). The structure of coupled photocatalyst was characterized by SEM, XRD and FT-IR technique, respectively. The results showed TiO2 has anatase structure and RuO2 doped was highly dispersed on the surface of TiO2 particles as amorphous. The average thickness of RuO2/TiO2 films (3 layers) on FP was determined to be about 1μm. This study confirmed that under the following conditions: volume 60ml, initial concentration of beta-cypermethrin (BEC) 45mg/L, pH 6.5, amount of RuO2/TiO2/PF 5g/L, air flow rate 200mL/min, reaction time 60min, the degradation rates of BEC are 88.1％(125 W Hg lamp), 82.8％(5 W UV lamp) and 75.1％ (solar lamp), respectively. The photocatalytic degradation of BEC was experimentally demonstrated to follow the Langmuir-Hinshelwood kinetic model, and the reaction rate constant (17.5 mg·(L·min) - 1 ) and the adsorption constant (3.486×10-3L·mg - 1 ) were determined , respectively. It was also found that the RuO2/TiO2 /FP photocatalyst has significantly the visible light photoactivity for degradation of BEC.
Photocatalytic films photocatalytic degradation RuO2/TiO2 coupled photocatalyst float pearls beta-cypermethrin(BEC)
姚秉华 王理明 王骋 王逸迅
西安理工大学理学院应用化学系,西安710048 西安理工大学理学院应用化学系,西安710048;西安工程大学环境与化工学院,西安,710048
国际会议
成都
英文
2007-11-19（万方平台首次上网日期，不代表论文的发表时间）