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Sunlight-driven C-TiO_2/FeTiO_3 composites were synthesized with different weight fractions of FeTiO_3.The as-prepared samples were characterized by UV-Visible diffuse reflectance spectroscopy,Fourier transform infrared spectroscopy,X-ray diffraction analysis,transmission electron microscopy,scanning electron microscopy,energy-dispersive X-ray spectroscopy,and photoluminescence.Under sunlight irradiation,the C-TiO_2/FeTiO_3 photocatalysts degraded methyl orange(MO) efficiently and displayed much higher photocatalytic activity than that of pure FeTiO_3 or carbon-doped titanium dioxide(C-TiO_2),and the C-TiO_2/FeTiO_3 photocatalyst with 10 wt%of FeTiO_3 exhibited the highest photocatalytic activity.The enhancement of photocatalytic activity was mainly ascribed to the formation of a heterojunction between C-TiO_2 and FeTiO_3,which facilitated the transfer and separation of photogenerated electron-hole pairs.The quenching effects of different scavengers demonstrated that the reactive superoxide radicals(O_2~-) and hydroxyl radicals(OH) played a major role in the MO degradation.The possible photocatalytic mechanism is discussed on the basis of the band structures of C-TiO_2 and FeTiO_3.To further enhance the photocatalytic efficiency,double-heterojunctioned CQD/C-TiO_2/FeTiO_3 composite was prepared by loading carbon quantum dots onto the C-TiO_2/FeTiO_3 surface.
Sunlight-driven C-TiO 2 / FeTiO 3 composites were synthesized with different weight fractions of FeTiO 3. The as-prepared samples were characterized by UV-Visible diffuse reflectance spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction analysis, transmission electron microscopy, scanning electron Microscopy, energy-dispersive X-ray spectroscopy, and photoluminescence. Undertone sunlight irradiation, the C-TiO 2 / FeTiO 3 photocatalysts degraded methyl orange (MO) efficiently and displayed much higher photocatalytic activity than that of pure FeTiO 3 or carbon-doped titanium dioxide -TiO 2), and the C-TiO 2 / FeTiO 3 photocatalyst with 10 wt% of FeTiO 3 show the highest photocatalytic activity. The enhancement of photocatalytic activity was mainly ascribed to the formation of a heterojunction between C-TiO 2 and FeTiO 3, which facilitated the transfer and separation of photogenerated electron-hole pairs. quenching effects of different scavengers prototype that said reactive super oxide radicals (O_2 ~ -) and hydroxyl radicals (OH) played a major role in the MO degradation. Possible solution mechanism is discussed on the basis of the band structures of C-TiO_2 and FeTiO_3.To further enhance the photocatalytic efficiency, double -heterojunctioned CQD / C-TiO 2 / FeTiO 3 composite was prepared by loading carbon quantum dots onto the C-TiO 2 / FeTiO 3 surface.