To study the effect of different incendiary agent loading on photocatalytic activity of TiO2,TiO2 powders were prepared with sol-gel auto-igniting synthesis(SAS) method,while tetra-n-butyl titanate and TiCl4 were used as precursor separately.The structure of TiO2 was characterized with XRD and SEM,and photocatalytic activity examined with degradation of methylene blue(MB).Results indicated that TiO2 powders shows as excellent loose and multi-hole material prepared with SAS.With tetra-n-butyl titanate and TiCl4 as precursor,the optimal ratio of n(Ti):n(citric acid):n(NH4NO3)are 1:1:2 and 1:3:5,the according particle sizes are 0.1μm and 20nm,degradation rate constants of MB increase 60% and 100% compared with normal TiO2 powder prepared without SAS method.
