Graphitic carbon nitride nanosheets decorated with TiO2 mesocrystals for visible-light photodegradation of rhodamine B
| Autor: | Xiao-Ming Liu, Yong-Chun Huang, Xiu-Kui Bai, Chao Li, Cai-Xia Lei, Gang-Sheng Zhang, Wan-Ling Zhong |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Photoluminescence Materials science Graphitic carbon nitride Condensed Matter Physics Photochemistry 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry 0103 physical sciences Photocatalysis Rhodamine B Charge carrier Electrical and Electronic Engineering Absorption (chemistry) Photodegradation Visible spectrum |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 32:8687-8702 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-021-05540-2 |
| Popis: | TiO2 mesocrystals (M-TiO2) can promote the adsorption of organic pollutants and provide effective conduction pathways for the photogenerated charge carriers. However, the pristine M-TiO2 had no visible-light absorption due to its wide band gap. In this paper, the hollow-box-structured mesoscopic TiO2/g-C3N4 (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-C3N4 and M-TiO2, respectively. Photoluminescence (PL) analysis confirmed that the coupling of M-TiO2 and g-C3N4 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-TiO2 and g-C3N4, which can effectively promote the separation of charge carriers and achieve the visible-light absorption. |
| Databáze: | OpenAIRE |
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