Study on preparation and improvement of palygorskite-TiO_2 as a photocatalytist

Wastewater from chemical industry is toxic and its complex compound is difficult to be biodegraded as well.This paper studies photocatalytic oxidation treatment effect by taking p-dihydroxybenzene degradation as an example.In the experiment,the palygorskite carrier is prepared.Then palygorskite-TiO2 is made by the sol-gel method,and in this reaction the Ti(OC4H9)4 is the main material and the palygorskite is the core.In order to improve the photocatalytic degradation activity of palygorskite-TiO2 for p-dihydroxybenzene,the conditions of preparing are selected and better photocatalytic activity is obtained.With the SnCl4·nH2O as the main material,SnO2·nH2O is prepared through the precipitation method so as to improve the photocatalytic degradation activity of palygorskite-TiO2 and prepare palygorskite-SnO2-TiO2.Through the photocatalytic degradation activity of palygorskite-SnO2-TiO2 for p-dihydroxybenzene,the better proportion of each parts is selected and some trials are done under the high pressure xenon lamp which can produce simulative sun's ray.The morphology and structure are characterized by XRD and TEM.