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Titanium dioxide-doped graphene aerogel (TiO 2 /GA) was synthesized via one-pot the hydrothermal method. The characterisation of the prepared nanocomposite was thoroughly investigated with various modern analysis method. The results revealed a good terms in both of photo–absorption and nanoparticle sizing. The low band-gap energy of 2.61 eV and the larger specific surface area of TiO 2 /GA are the main differentiators when compared to the pristine materials. The size of TiO 2  nanoparticles has been observed to range from 5 to 20 nm, which is necessary to promote a high photocatalytic performance. The photocatalytic performance of TiO 2 /GA was examined through photodegradation of p-nitrophenol (PNP). The optimization via Box-Behnken model suggested that 99.89% of PNP could be removed at the pH 7, 20 mg photocatalyst dosage, and 1 mL H 2 O 2  volume. With the excellent results obtained, TiO 2 /GA material has extensive promise in the emoval of phenolic.

Enhanced photocatalytic activity of titanium dioxide-doped graphene aerogel towards p-nitrophenol removal from aqueous solutions