151. A general nonaqueous sol-gel route to g-C 3 N 4 -coupling photocatalysts: the case of Z-scheme g-C 3 N 4 /TiO 2 with enhanced photodegradation toward RhB under visible-light.
- Author
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Liu X, Chen N, Li Y, Deng D, Xing X, and Wang Y
- Abstract
The g-C
3 N4 -coupling TiO2 photocatalysts with controllable particle size as well as the interface contact were prepared by a general nonaqueous sol-gel method. The structural and morphological features of g-C3 N4 /TiO2 were investigated through the X-ray diffraction, Fourier transformed infrared spectra, scanning electron microscopy and transmission electron microscopy, respectively. It is found the TiO2 nanoparticles with a size of 7.3 ± 1.6 nm are uniformly anchored on the surface of the g-C3 N4 nanosheets in isolation. The photocatalytic properties of as-prepared g-C3 N4 /TiO2 were tested by degradation of Rhodamine B (RhB) under visible light, and an enhanced activity is observed. The mechanism of the enhanced activity was further investigated through N2 adsorption-desorption isotherms, UV-vis spectra, photoluminescence spectra, photoelectrochemical measurements, radical trapping experiments and X-ray photoelectron spectroscopy. Furthermore, the photocatalytic performances of obtained g-C3 N4 /TiO2 under sunlight were also evaluated in aspects of degradation efficiency and stability. The results indicate that the obtained g-C3 N4 /TiO2 is one promising photocatalyst for practical applications. The study of as-prepared g-C3 N4 /TiO2 also implies that the present method could be a general route of g-C3 N4 -coupling photocatalysts.- Published
- 2016
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