Study On Preparation And Properties Of TiO₂ Supported On Float Stone

As poisonous and complicated of chemical composition of printing and dying wastewater, the degradation and treatment of them is a very difficult problem in the field of them wastewater treatment. Photocatalytic oxidation of water contaminants with semiconductors has been reported as one of more promising remediation technologies for complete mineralization of undesirable orgnic contaminants, particularly toxic and unbiodegradable organic compounds. TiO₂ has been showen to be an excellent photocatalyst owing to its stable chemical characteristics and low price,etc. TiO₂ photocatalytic oxidation changes from suspend estate to fixation estate. For fixed TiO₂ can easily been separated with depurated object, and been reused, so it has more practicly application value. At present, the kinds of carrier for TiO₂ are although plenty, but they all have advantages ang disadvantages. So this leads their application coming in for limitation. In order to improve the photocatalytic activity, seek ask for perfect carrier, this thesis studies the preparation method of loaded type TiO₂ photocatalyst , moreover uses dye X-3B as model reactant, evaluates the photocatalytic acivity of TiO₂, tokens this photocatalyst. 1. Preparation of photocatalyst TiO₂/floatstone photocatalyst was prepared by Sol-gel-immertion method. 2. Photocatalytic oxidation degradation experiments The photocatalytic activity of TiO₂/floatstone was evaluated by the photodegradation of Dye X-3B,and the effects of various conditions on the photocatalytic characteristics were investigated. The structure and morphology of catalysts were characterized by XRD and TEM.