Jump to main content
Jump to site search

Issue 21, 2013
Previous Article Next Article

The CNT modified white C3N4 composite photocatalyst with enhanced visible-light response photoactivity

Author affiliations

Abstract

A novel, multi-walled carbon nanotubes (CNT) modified white C3N4 composite (CNT/white C3N4) with enhanced visible-light-response photoactivity was prepared. The white C3N4 and CNT combined together and formed the CNT/white C3N4 composite due to electrostatically-driven self-assembly with the hydrothermal method. The as-prepared white C3N4 and CNT/white C3N4 composite photocatalyst were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), UV-vis absorption spectra, X-ray photoelectron spectroscopy (XPS) and photoluminescence spectroscopy (PL). The photoelectrochemical it curves were tested using several on–off cycles of light irradiation. The photoactivity of the catalysts was evaluated by degrading methylene blue (MB) dye solution. The results showed that the photoactivity for the degradation of MB solution was in the following order: CNT/white C3N4 composite > C3N4 > the white C3N4. The photoactivity of the CNT/white C3N4 composite was 66.5% and 34.5% higher than that of the white C3N4 sample and that of the C3N4 at 1.5 h, respectively. The degradation rate of the CNT/white C3N4 photocatalyst was almost 8.1 times as high as that of the white C3N4. The results indicated that CNT played an important role, which led to the efficient separation of the photo-generated charge carriers. The reason why the photoactivity of the CNT/white C3N4 was much higher than that of C3N4 and the white C3N4 was discussed. A possible mechanism of CNT on the enhancement of composites' visible light performance was also proposed.

Graphical abstract: The CNT modified white C3N4 composite photocatalyst with enhanced visible-light response photoactivity

Back to tab navigation

Supplementary files

Publication details

The article was received on 30 Nov 2012, accepted on 27 Feb 2013 and first published on 28 Feb 2013


Article type: Paper
DOI: 10.1039/C3DT32871F
Citation: Dalton Trans., 2013,42, 7604-7613
  •   Request permissions

    The CNT modified white C3N4 composite photocatalyst with enhanced visible-light response photoactivity

    Y. Xu, H. Xu, L. Wang, J. Yan, H. Li, Y. Song, L. Huang and G. Cai, Dalton Trans., 2013, 42, 7604
    DOI: 10.1039/C3DT32871F

Search articles by author

Spotlight

Advertisements