Preparation Of Titanium (Silver)/Silica Mesoporous Composites And The Research Of Their Photo Catalytic Performance

In this paper, the titanium (silver)/silica mesoporous composites, which have highly efficient photo catalytic activity, were synthesized by sol-gel process. The methyl orange solution was selected as simulated industrial wastewater, the catalytic degradation performance of titanium (silver)/silica mesoporous composites were studied under visible light and ultraviolet irradiation.Nonionic surfactant P123 as template, titanium tetrachloride (TiCl3) and tetraethyl orthosilicate(TEOS) as precursor, the ordered structure of titanium/silica mesoporous composite materials were prepared under acidic conditions by sol-gel process. The reaction conditions were optimized. The structure and properties of composite materials were characterized by TG, XRD, N2 adsorption-desorption, TEM etc. The results show that mesoporous composites have regular ordered mesoporous structure. The titanium/silica mesoporous composite was used to degrade methyl orange solution under ultraviolet light. The results show that when the molar ratio of Ti/Si was 1:2, The photo catalytic activity of titanium/silica mesoporous composite reached maximum. The degradation rate of methyl orange can reached 99.7% for 4 hour under ultraviolet light radiationThe silver/silica mesoporous composites were prepared under acidic condition by sol-gel method with cationic surfactant stearyl trimethyl ammonium bromide (STAB) as template and silver nitrate (AgNO3) and TEOS as precursor. The effects of reaction conditions on structure and properties of silver/silica composite were studied. The structure and properties of composite materials were characterized by TG, XRD, N2 adsorption-desorption, TEM etc. The results show that mesoporous composites have regular ordered mesoporous structure. The silver/silica mesoporous composite was used to degrade methyl orange solution under ultraviolet light. The results show that when the molar ratio of Ag/Si was 1:5. The photo catalytic activity of silver/silica mesoporous composite reached maximum. The degradation rate of methyl orange can reached 97.2% for 4 hour under ultraviolet light radiation...