Load Of Tio <sub> 2 </ Sub> Photocatalytic Degradation Of Naphthalene Compounds

TiO2 catalyst was desposited on granular activated carbon modified with acetic acid by sol-gel method. The optimum process condition of the preparation of the catalyst was determined with methylene blue as experimental object. The ratio of volume was 1 : 4 : 0.13 : 0.1 (butyl titanate, ethanol,liquid and acetic acid).TiO2 catalyst supported on granular activated carbon was characterized by XRD, SEM,FT-IR,BET,adsorption value of methylene blue,quanity of titania and photocatalytic activity on methylene blue.The preparation of TiO2 catalyst modified with acetic acid and poly ethylene glycol was discussed in this paper, characterized by XRD, SEM, FT-IR, BET, adsorption value of methylene blue,quanity of titania.The results show that pore-size distribution, adsorption value of methylene blue,quanity of titania and photocatalytic activity were higher than of modification by acetic acid.Photocatalytic degradation of naphthalene compounds in water were studied by TiO2 catalyst supported on granular activated carbon under irradiation of 250W mercury lamp of high pressure. The condition of photocatalytic degradation and manipulative factors were studied in this paper.The results of photocatalytic degradation of naphthalene compound were as follows:(1)The degradation ratio of naphthalene compounds was greatly affected by initial concentration. While initial concentration increased, the degradation ratio decreased in evidence. The reaction of photocatalytic degradation accorded with one-step dynamics kinetics deducting adsorption.(2)pH value of solution influenced differently on the degradation ratio for the species of naphthalene compound.(3)When hydrogen peroxide existed in initial solution, the degradation efficiency can improve in evidence.