Tio <sub> 2 </ Sub>-of Sno <sub> 2 </ Sub> Binary Complex Catalyst, Preparation And Photocatalytic Degradation Of Tnr

Ti_O2-SnO₂ particles have been prepared with NH4HCO₃, SnCl₄·5H₂O and merchandise TiO₂ by hydrolysis-precipitation method. Many influences have been discussed during the preparation process such as the additive velocity of NH4HCO3, the initial concentration of Sn⁴⁺, the concentration of NH4HCO3, the stir rate and the temperature of the solution. A best operation method has been established after those experiments. Under that best operation method, seven different kinds of composite catalyst have been made. The quality ratio of TiO₂ to SnO₂ was different, which ranged from 4:1 to 10:1. The photocatalytic degradation of 2,4,6-Trintroresorcinol has been carried out with these seven different catalysts. The result showed that the best quality ratio of TiO₂ to SnO₂ was 9:1. After the analysis of XRD and from the remove rate of 2,4,6-Trintroresorcinol, a conclude that the best drying temperature was 600℃ has been found. At last, some experiments for the 9:1 catalyst have been carried out. The results showed that the reaction of decomposing 2,4,6-Trintroresorcinol was a first order kinetic process. The best dosage of catalyst was 1.0g/L. The smaller the initial concentration of 2,4,6-Trintroresorcinol was, the higher the remove rate was. The composite catalyst of TiO₂ and SnO₂ combined firmly, and it can be used for many times.