Potocatalytic Degradation 2,4-DCP By TiO₂-γAl₂O₃ Microsphere

TiO2 is being increasingly researched and explored by researchers and implemented more widely, for its inexpensive, non-toxic to humans and photochemical catalysis. However, there are also some limitations of its implementation for its shape shortages. There are two shapes of TiO2 nanometer photocatalyst, powder and sol, are being researched and prepared nowadays, both of which are not conducive to recovery in implementation. The TiO2-γAl2O3 micro-balloons were prepared in this paper with the sol-gel method, whose grain diameter is between 1-2 mm. In a photocatalytic reactions degradation 2,4-DCP, we found it has high photocatalytic performance.During the experiment process, comparative experiments were carried out respectively to research the influences of such elements as pH, ultrasonic time, amount of water being dried and evaporated and calcinations methods, in granulation rate of micro-balloons being prepared. An optimum preparation technology was settled at last.The TiO2-γAl2O3 micro-balloon photochemical catalysis was prepared in this experiment with the different conditional factors such as Al-Ti molar ratio, calcination temperature of micro-balloon preparation and calcination time. And the photocatalytic degradation of 2,4-DCP was carried out. The solution concentration of 2,4-DCP had been photocatalytic degraded was measured by High Performance Liquid Chromatography, through representation of micro-balloon being prepared by XRD. By comparing the results, a set of factors including the best Al-Ti molar ratio of TiO2-γAl2O3 micro-balloon, calcination temperature and calcination time was defined.Uniform design method was also adopted in this paper to design experiments, considering the influence of Cl" concentration, pH, concentration of micro-balloon and 2,4-DCP concentration in the reaction solution of photocatalytic reaction on photocatalytic degradation rate of TiO2-γAl2O3 micro-balloon chlorophenol photocatalytic. The best reaction condition was confirmed by regression analysis method after determined by high performance liquid. All of the conditions above were synthesized in the best preparation technology process and reuse of micro-balloon in photocatalytic degradation, to watch the reuse rate of TiO2-γAl2O3 micro-balloon. Also the intermediate product and degradation mechanism of photochemical catalysis solution were measured and analyzed byHPLC-MS.