Graphitic carbon nitride nanosheets decorated with TiO2 mesocrystals for visible-light photodegradation of rhodamine B

TiO 2 mesocrystals (M-TiO 2 ) can promote the adsorption of organic pollutants and provide effective conduction pathways for the photogenerated charge carriers. However, the pristine M-TiO 2 had no visible-light absorption due to its wide band gap. In this paper, the hollow-box-structured mesoscopic...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2021-04, Vol.32 (7), p.8687-8702
Main Authors: Zhong, Wan-Ling, Li, Chao, Liu, Xiao-Ming, Bai, Xiu-Kui, Huang, Yong-Chun, Zhang, Gang-Sheng, Lei, Cai-Xia
Format: Article
Language:English
Subjects:
Carbon nitride
Characterization and Evaluation of Materials
Chemistry and Materials Science
Composite materials
Current carriers
Electromagnetic absorption
Liquid phase deposition
Liquid phases
Materials Science
Nanosheets
Optical and Electronic Materials
Oxidation
Photodegradation
Photoluminescence
Pollutants
Rhodamine
Synergistic effect
Titanium dioxide
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Summary:TiO 2 mesocrystals (M-TiO 2 ) can promote the adsorption of organic pollutants and provide effective conduction pathways for the photogenerated charge carriers. However, the pristine M-TiO 2 had no visible-light absorption due to its wide band gap. In this paper, the hollow-box-structured mesoscopic TiO 2 /g-C 3 N 4 (M-T-CN) composites with visible-light response were prepared by liquid phase deposition (LPD) and topological transformation. The results showed that the sample of M-T-CN-300 can degrade 99.1% Rhodamine B (RhB) solution within 15 min under illumination. The reaction rate constant of M-T-CN-300 was nearly 3 times and 34 times that of pristine g-C 3 N 4 and M-TiO 2 , respectively. Photoluminescence (PL) analysis confirmed that the coupling of M-TiO 2 and g-C 3 N 4 can reduce the recombination of photogenerated charge carriers. The enhanced photocatalytic performance in M-T-CN composite material was mainly attributed to the synergistic effect of M-TiO 2 and g-C 3 N 4 , which can effectively promote the separation of charge carriers and achieve the visible-light absorption.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-021-05540-2