Carbon-doped TiO2 has been well studied as an efficient visible light photocatalyst. It can be prepared using nontoxic precursors under mild conditions. Various carbon precursors including glucose have been used to prepare Carbon-doped TiO2. This work investigates the surface chemistry of the Carbon-doped TiO2 in relation to its photocatalytic activity for visible light degradation of 2,4-diclorophenol (2,4-DCP) in water. Photocatalysts prepared from sucrose, glucose and fructose are observed by XPS and ToF-SIMS to deposit different surface carbon fragments and moieties following heat treatment. Catalysts with comparable bandgap energies were observed to display very different photocatalytic activity and product distribution. It was also observed that certain surface moieties such as carboxylic and carbonyl groups affect the adsorption of 2,4-DCP, and participate in the reaction.

Role of surface chemistry in the photocatalytic properties of carbon-doped TiO<sub>2</sub>

246th National Meeting (2013)

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Role of surface chemistry in the photocatalytic properties of carbon-doped TiO2

Role of surface chemistry in the photocatalytic properties of carbon-doped TiO₂