With butyl titanate (TNB) as prescursor, the supported nanometerTiO2 Photo-catalyst was prepared by sol-gel method . Modified bentonite was activated by sulphuric acid as its support. Their structures were characterized by X-ray diffraction. The optimum preparation conditions and the supported nanometer TiO2 photo-catalysis activity were studied and evaluated by the supported nanometer TiO2 photo-catalysis photo degradation phenol in analog industrial wastewater. The experiment results showed that the best ...