Degradation of humic acid in aqueous solution by catalysis of nanosized TiO_2 supported on haydite

This paper presented the results of photocatalysis degradation of humic acid by nanosized TiO2 supported on haydite.Catalysts are prepared by sol-sel method,and sintered in electrical resistance furnace.The XRD,TG-DTA,FT-IR are also used to characterize the catalysts.The photocatalysis capability of the catalysts and influencing factors of photocatalysis degradation are studied,such as the catalyst dosage,the initial concentration and the pH value of humic acid solution and the experiment of the catalyst repeated used.The photocatalysis capabilities of the catalysts at different sintered temperature are compared.The optimum sinter temperature is found for preparing the catalyst.The results indicates that when the catalyst is sintered at 700℃,it has the best property of photocatalysis;as the initial concentration and the pH value of humic acid solution decreases,the removing rate of humic acid increases.Besides,the catalyst showes good photocatalysis capability after repeated used.