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Thesis as a carrier independent research and development of fly ash - forming adsorbents (FFA) , tetrabutyl titanate as titanium source , using sol - gel prepared fly ash - forming adsorbents load nitrogen , iron co-doped TiO2 ( N, Fe-TiO2/FFA) photocatalyst. Of N Fe-TiO2/FFA photocatalyst crystal structure , particle size and morphology were characterized by XRD, SEM, UV-Vis absorption spectroscopy , FTIR . By degradation of methylene blue (MB) , the effects of the calcining time , amount of catalyst, the heat treatment temperature under different conditions photocatalytic activity . Experiments show that , under visible , after the N, Fe doped TiO2 showed a more excellent catalytic ability , in the sol pH = 6,500 ° C for calcination 2h, dosage of 5g / L , the rate of photodegradation 92.6% . When the alkaline pH of MB solution , the photodegradation rate of more than 97% . N, Fe-TiO2/FFA reactive brilliant blue degradation effect : intensity 90W , pH = 4 , the reaction is best . Added 4ml of H2O2 can significantly increase the efficiency of reactive brilliant blue photodegradation . Kinetics analysis : With the increase in initial concentration of reactive brilliant blue , the photocatalytic degradation process to meet a dynamic model , the surface reaction rate constant k with increasing concentration . Homemade photocatalytic reaction device , research N, Fe-TiO2/FFA degradation effect of formaldehyde gas . The effects of the calcination temperature , light intensity , humidity , and the initial concentration of factors such as the impact of the handover efficiency . The results showed that : the catalyst dosage 50g/0.32m3 system humidity is 40 % better . When the concentration of 7.1 mg/m3 , 180min the degradation efficiency of approximately 67%. The study of the kinetics of photocatalytic degradation of formaldehyde gas : its the LH dynamics model of a reaction kinetics . Increase the photocatalytic reaction rate constant k gradually increases with the initial concentration of formaldehyde ; Langmuir adsorption constant K becomes smaller with the increase in the concentration of formaldehyde initial .
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