Growth of g-C3N4 on mesoporous TiO2 spheres with high photocatalytic activity under visible light irradiation

Chen, X, Wei, J, Hou, R, Liang, Y, Xie, Z, Zhu, Y, Zhang, X and Wang, H 2016, 'Growth of g-C3N4 on mesoporous TiO2 spheres with high photocatalytic activity under visible light irradiation', Applied Catalysis B: Environmental, vol. 188, pp. 342-350.


Document type: Journal Article
Collection: Journal Articles

Title Growth of g-C3N4 on mesoporous TiO2 spheres with high photocatalytic activity under visible light irradiation
Author(s) Chen, X
Wei, J
Hou, R
Liang, Y
Xie, Z
Zhu, Y
Zhang, X
Wang, H
Year 2016
Journal name Applied Catalysis B: Environmental
Volume number 188
Start page 342
End page 350
Total pages 9
Publisher Elsevier
Abstract Growth of graphitic carbon nitride on mesoporous TiO 2 spheres with well-controlled structures was achieved by melt-infiltrating dicyandiamide (DICY). The molten DICY diffused into the porous structure of TiO 2 , and g-C 3 N 4 was produced inside the mesopores formed by packing of TiO 2 nanoparticles at higher temperature, resulting in a better fused g-C 3 N 4 -TiO 2 heterostructure. The formation of a strong interfacial connection between TiO 2 and g-C 3 N 4 by this preparation method greatly improved the separation efficiency of photo-generated electrons and holes. TiO 2 /g-C 3 N 4 composites exhibited much higher photocatalytic activity than TiO 2 and g-C 3 N 4 towards the degradation of Rhodamine B under both UV light and UV-vis light irradiation. The heterostructured combination provided a synergistic photocatalytic activity through an efficient electron transfer process. Based on the experimental results, a possible mechanism for the improved photocatalytic performance was proposed. The factors affecting the photocatalytic activity were also discussed based on the result of structure analysis, optical and photoelectric characteristics, and photocatalytic reactions.
Subject Chemical Engineering not elsewhere classified
Keyword(s) G-C N 3 4
Heterostructure
Mesoporous TiO 2
Photocatalytic degradation
TiO /g-C N 2 3 4
DOI - identifier 10.1016/j.apcatb.2016.02.012
Copyright notice © 2016 Elsevier B.V.
ISSN 0926-3373
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