Mesoporous graphitic carbon nitride and carbon–TiO2 hybrid composite photocatalysts with enhanced photocatalytic activity under visible light irradiation. Issue 1 (March 2016)

• Record Type: Journal Article
• Authors: Wu, Yongmei; Chen, Shuai; Zhao, Jie; Yue, Xiu; Deng, Wenye; Li, Yingxuan; Wang, Chuanyi
• Is Part Of: Journal of environmental chemical engineering. Volume 4:Issue 1(2016:Mar.)
• Page Start: 797
• Page End: 807
• Publication Date: 2016-03
• Subjects: Carbon–TiO2 composites -- Graphitic carbon nitride -- Photocatalysis -- Visible light; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2015.10.023
• Languages: English
• ISSNs: 2213-2929

Abstract

Graphical abstract: Abstract: The mesoporous g-C3 N4 /C–TiO2 composites with efficient visible light photocatalytic activity were prepared by a facile heating method. The as-prepared g-C3 N4 /C–TiO2 composites were thoroughly characterized by X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, N2 adsorption–desorption analysis, UV–vis diffuse reflectance spectroscopy and X-ray photoelectron spectroscopy. As evaluated by the degradation of methylene blue under visible light irradiation, g-C3 N4 /C–TiO2 composites exhibit much higher photocatalytic activities than pristine g-C3 N4 and C–TiO2, respectively. Moreover, the prepared composite catalysts retain good stability; their photodegradation efficiency hardly changes after four cycles. The significant enhancement in photodegradation activity over the g-C3 N4 /C–TiO2 catalyst could be ascribed to the combined effects coming from the enhanced visible light absorption, enriched adsorption of the dye on the photocatalyst and subsequent efficient separation of photogenerated charge carriers. A tentative mechanism for the photodegradation process was proposed.