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Abstract

The effect of carbonization temperature during the sol-gel preparation of TiO2/C hybrid aerogels on their photocatalytic performance for degradation of methylene blue and methyl orange is investigated. XRD, SEM, TEM, N2 adsorption, XPS and UV-visible spectroscopy were used to characterize the physico-chemical properties of TiO2/C hybrid aerogels. Results showed that higher carbonization temperature can promote the growth of TiO2/C nanoparticles in sol-gel process. Thereby, the porous properties, adsorption equilibrium and kinetics for methylene blue adsorption, crystalline size and band gap of TiO2 in the hybrid aerogels are changed accordingly. The photocatalytic activity of the hybrid aerogels is dominantly determined by adsorption equilibrium and kinetics. The narrowness of the band-gap and light availability are also responsible for the high photocatalytic activity.

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Photocatalysts Degradation Methylene blue Methyl orange Sol-gel method

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