Performance of Heterogeneous Photocatalytic Systems: Influence of Operational Variables on Photoactivity of Aqueous Suspension of TiO2

摘要: Abstract The influence of incident light intensity and some physical chemical parameters on the absorbed backward reflected photon flow reactivity a heterogeneous photocatalytic system was investigated. oxidation phenol in aqueous solution presence polycrystalline TiO 2 powder used as test reaction. Home-prepared (anatase) specimens, subjected to various thermal treatments, were for experimental runs performed batch photoreactor directly irradiated. investigated surface area size particles, while studied initial pH suspension reacting medium additives affecting photoreactivity such Cl − H O . It found that ratio between does not depend operative variables, apparent Napierian extinctance coefficient, which is parameter related absorption rate, depends only particle decreases increases. photoreaction quantum yield, defined reaction rate determined conditions this work. results showed at equivalent yield an intrinsic feature semiconductor material; varies by varying which, our case, affected