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Tianjiao Bi,Jiafeng Wan,Shilin Yang,Xiujuan Yu,Fangwei Ma 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2015 NANO Vol.10 No.5
Nitrogen-doped mesoporous carbon spheres (NMCSs) supporting anatase TiO2 (NMCSs – TiO2) were prepared by a simple two-step solvothermal approach. The characterizations for the physicochemical properties of prepared samples under different solvothermal temperatures were carried out by X-ray diffraction (XRD) analyses, scanning electron microscopy (SEM), transmission electron microscopy (TEM), N2 adsorption – desorption (Brunauer – Emmett – Teller (BET) measurements), Fourier transform infrared (FT-IR) spectroscopy, Raman scattering and UV-Vis diffuse reflectance spectra, were combined in order to determine the crystal phase and grain size, shape, degree of mesoporous carbon incorporation, and nature of the resultant oxy-carbide chemical bonding on the surface and in the bulk. The high relative photocatalytic activity of NMCSs – TiO2 nanoparticle was evaluated through a study of the decomposition of phenol under visible-light excitation.
Jialin Jia,Dong Li,Jiafeng Wan,Xiujuan Yu 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.33 No.-
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.