Characterization and mechanism analysis of graphite/C-doped TiO2 composite for enhanced photocatalytic performance

Characterization and mechanism analysis of graphite/C-doped TiO2 composite for enhanced photocatalytic performance

Graphite/C-doped TiO2 composite was synthesized through a modified sol–gel reaction. DRS resultsindicated that light absorbance edge of graphite/C-doped TiO2 was clearly red-shifted to visible lightregion by doping with C. SPS results displayed that separation efficiency of photoinduced charge carriersof graphite/C-doped TiO2 were greatly increased by coupling with graphite. Moreover, the photocatalyticperformance of composite was evaluated by the degradation of methyl orange (MO). Results showedthat graphite/C-doped TiO2 exhibited higher photocatalytic activity for MO than that of pristine TiO2 andP25, which was mainly attributed to the high crystallization, large surface hydroxyl groups, intensevisible light absorption and effective separation of photoinduced charge carriers.

Graphite/C-doped TiO2 composite was synthesized through a modified sol–gel reaction. DRS resultsindicated that light absorbance edge of graphite/C-doped TiO2 was clearly red-shifted to visible lightregion by doping with C. SPS results displayed that separation efficiency of photoinduced charge carriersof graphite/C-doped TiO2 were greatly increased by coupling with graphite. Moreover, the photocatalyticperformance of composite was evaluated by the degradation of methyl orange (MO). Results showedthat graphite/C-doped TiO2 exhibited higher photocatalytic activity for MO than that of pristine TiO2 andP25, which was mainly attributed to the high crystallization, large surface hydroxyl groups, intensevisible light absorption and effective separation of photoinduced charge carriers.