ساخت كاتاليست نوري TiO2 با استفاده از مواد فعال سطحي و SBA - 15 به عنوان پايه جهت تخريب ساختار فنل در آب

چكيده انگليسي :

85 Synthesis of TiO2 Photocatalyst by Surfactants and SBA 15 as Support for Destruction of Phenol in Water Mohammad Javad Dianat mj dianat@ce iut ac ir August 16 2015 Department of Chemical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisors H Zilouei hzilouei@cc iut ac ir A Izadbakhsh izadbakhsh@pgu ac ir Abstract To assess the ability of TiO2 in the destruction of phenol the test conditions were selected first The two lamps first with UV radiation and another one with visible radiation was used and for eachexperiment the desired concentration of phenol in water was prepared Also the synthesized photocatalystwere used in powder form and to spread them in a solution the magnetic stirrer was used The wavelength oflights measured by a spectrometer For the synthesis of TiO2 first the structure of the photocatalyst wasmodified by three surfactants Pluronic P 123 Pluronic F 127 and CTAB XRD test were taken from each ofthe three photocatalyst and it was found that all three catalysts are in anatase phase and have crystals of 10 15nm After testing the photocatalysts with UV light it was found that TiO2 synthesized by P 123 by 64 41 3 93 phenol destruction under the test condition was the best choice In the second part TiO2 mesopore wassynthesized XRD UV Vis DRS and nitrogen absorption and desorption tests were taken from thisphotocatalyst From XRD test it was found that the catalyst is synthesized in the anatase phase Also from BET 2equation the surface area of mesopore catalyst M TiO2 was obtained 107 2851 4 7641 m g and from BJHmethod in nitrogen absorption and desorption it was found that the catalyst has an average pore diameter of13 55 nm and has a uniform pore size The catalyst was used in the experiment of phenol destruction by UVlight and it was found that the ability of the photocatalyst in destruction of phenol in water is 44 91 6 32 Inthe third part SBA 15 was used in the first method SBA 15 was synthetized and then TiO2 were deposited inits structure and the photocatalyst was named TiO2 SBA 15 In the second method through synthesis of SBA 15 Ti source was added and the synthesized photocatalyst named Ti SBA 15 Nitrogen adsorption anddesorption test for Ti SBA 15 showed that the photocatalyst has a surface area of 848 0621 4 8314 m2 g thatis far greater than M TiO2 and TiO2 SBA 15 After phenol destruction experiment it was found that the Ti SBA 15 photocatalyst has a higher potential in the destruction of phenol in water to 85 32 1 72 Then Cu Ti SBA 15 Ni Ti SBA 15 and Fe Ti SBA 15 photocatalysts were synthesized and it was found that the use ofthree metals Cu Ni and Fe reduces the ability of the Ti SBA 15 photocatalyst in the destruction of phenol inwater Then the most appropriate conditions for amount of photocatalyst initial concentration of phenol andeffect of H2O2 on phenol destruction for Ti SBA 15 were investigated and it was found that the most properamount of photocatalyst Ti SBA 15 equivalent 1 g L It was also found an increase in concentration of phenolreduces the ability of the photocatalyst in phenol destruction The quality of photocatalysts synthesized in thethird part tested by XRD UV Vis DRS and absorption and desorption of nitrogen In another part visible lightwas tested for phenol destruction in water by using photocatalyst that finally it was found that synthesizedphotocatalysts have limited activity in the visible region Keywords photocatalyst phenol destruction TiO2 SBA 15

ديانت، محمدجواد

ساخت كاتاليست نوري TiO2 با استفاده از مواد فعال سطحي و SBA - 15 به عنوان پايه جهت تخريب ساختار فنل در آب