摘要：Using rectorite as raw material, REC is modified by nitric acid, TiO 2 is attached to the surface of the acidized modified REC tablet to form modified REC-TiO 2 composite materials by the sol-gel method, and its adsorption performance and photocatalytic properties were studied. The results show that the adsorption of REC, modified REC, modified REC-TiO 2 composite materialtoporads to methylene blue increased with the increase of equilibrium concentration. The process of adsorption MB of modified REC-TiO 2 composite materials is an endothermic process. The adsorption of REC, modified REC, modified REC-TiO 2 composite materials to MB increased with the increase of temperature. When the temperature is 25 degree, the maximum adsorption capacity of REC is 93.985 mg/g, the maximum adsorption capacity of modified REC is 107.006 mg/g, and the maximum adsorption capacity of modified REC-TiO 2 is 120.773 mg/g. The degradation rate of MB and p-nitrophenol by modified REC-TiO 2 composite under illumination are 99% and 98%, respectively. The decontamination rate of MB and 4-NP of modified REC-TiO 2 composites under darkness was 50% and 0.8%, respectively. Under light conditions, the degradation rate of MB and 4-NP in modified REC-TiO 2 composite materials is improved.
其他摘要：Using rectorite as raw material, REC is modified by nitric acid, TiO 2 is attached to the surface of the acidized modified REC tablet to form modified REC-TiO 2 composite materials by the sol-gel method, and its adsorption performance and photocatalytic properties were studied. The results show that the adsorption of REC, modified REC, modified REC-TiO 2 composite materialtoporads to methylene blue increased with the increase of equilibrium concentration. The process of adsorption MB of modified REC-TiO 2 composite materials is an endothermic process. The adsorption of REC, modified REC, modified REC-TiO 2 composite materials to MB increased with the increase of temperature. When the temperature is 25 degree, the maximum adsorption capacity of REC is 93.985 mg/g, the maximum adsorption capacity of modified REC is 107.006 mg/g, and the maximum adsorption capacity of modified REC-TiO 2 is 120.773 mg/g. The degradation rate of MB and p-nitrophenol by modified REC-TiO 2 composite under illumination are 99% and 98%, respectively. The decontamination rate of MB and 4-NP of modified REC-TiO 2 composites under darkness was 50% and 0.8%, respectively. Under light conditions, the degradation rate of MB and 4-NP in modified REC-TiO 2 composite materials is improved.
