Construction of g-C3N4 based heterojunction photocatalyst by coupling TiO2-SnO2 solid solution for efficient multipurpose photocatalysis
| Autor: | Ju Li, Minguang Fan, Bin Li, Lihui Dong, Xuan Zhou, Yongcheng Huang, Zhangfa Tong, Zuzeng Qin, M.J. Huang |
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| Rok vydání: | 2021 |
| Předmět: |
Anatase
Materials science Nanocomposite Mechanical Engineering Metals and Alloys Heterojunction 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Reaction rate constant Chemical engineering chemistry Mechanics of Materials Materials Chemistry Rhodamine B Methyl orange Photocatalysis 0210 nano-technology Solid solution |
| Zdroj: | Journal of Alloys and Compounds. 864:158132 |
| ISSN: | 0925-8388 |
| Popis: | Designing g-C3N4 based heterojunction photocatalyst by coupling wide-bandgap semiconductors not only promote the increased charge separation but also can provide the opportunity of aptly modulating its thermodynamic properties. Herein, g-C3N4@TiO2-SnO2 nanocomposites has been judiciously designed and is followed to synthesize by a straightforward hydrothermal method. Essentially, g-C3N4 was integrated with TiO2-SnO2 solid solution, composed of two phases (anatase (A) and rutile (R)) to fabricate the g-C3N4@TiO2-SnO2 nanocomposites. The hybrid nanocomposite is utilized as a highly efficient multipurpose photocatalyst for pollutant removal (Methyl orange, Rhodamine B, Cr6+) and H2 evolution under visible/solar light irradiation. The reaction rate constant (k) values for the pollutant removal using this newly prepared g-C3N4@TiO2-SnO2 nanocomposite is found to be 14.4, 5.6 and 9 times higher than that of TiO2-SnO2, g-C3N4, and the physical mixture, respectively. The H2 evolution rate of g-C3N4@TiO2-SnO2 (220 μmol h−1 g−1) is also evaluated to be about 10 times higher than that of g-C3N4 (22 μmol h−1 g−1). The improved photoactivity of g-C3N4@TiO2-SnO2 nanocomposites is attributed to the improved electron-hole separation and the apt modulation of thermodynamic properties. |
| Databáze: | OpenAIRE |
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