以钛酸四丁酯为钛源制备溶胶-凝胶,采用浸渍煅烧法制备了贝壳类基纳米Fe3+-TiO2光催化剂。以碘钨灯为光源,研究了海水中油污的降解动力学。结果表明:油污的光催化降解分为2个阶段:第一阶段表观降解速率较快;第二阶段油污降解符合Langmuir-Hinshelwood动力学模型,反应速率常数k为3.52mg/(L.h),吸附平衡常数K为0.023 9L/mg,反应活化能Ea为23.551kJ/mol。

Sol-gel was prepared with the Tetrabutyl titanate which was used as catalytic active precursor.The Fe3+-doped TiO2/shell-base photocatalyst was loaded on the regular structured seashells by wet-impregnation-calcination method.The kinetic of degradation of oil on the surface of ocean over the Fe3+-doped TiO2/shell-base photocatalyst was studied using iodine-tungsten lamp as illuminating source.Oil photocatalytic degradation was divided into two stages.The first stage of the apparent degradation rate was faster.The second stage with oil degradation fit Langmuir-Hinshelwood dynamic model.Reaction rate constant k was 3.52 mg/(L·h),adsorption equilibrium constant K was 0.023 9 L/mg and reaction activation energy Ea was 23.551 kJ/mol.