The synthesis of Ag3PO4/g-C3N4 nanocomposites and the application in the photocatalytic degradation of bisphenol A under visible light irradiation
| Autor: | Shengchao Miao, Jing Yang, Dapeng Zhang, Xinyue Gu, Shihai Cui, Meixing Zhang, Nan Li, Jie Mei |
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| Rok vydání: | 2018 |
| Předmět: |
Reaction mechanism
Materials science Diffuse reflectance infrared fourier transform Scanning electron microscope Mechanical Engineering Metals and Alloys 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention X-ray photoelectron spectroscopy Mechanics of Materials law Transmission electron microscopy Materials Chemistry Photocatalysis Calcination 0210 nano-technology Photodegradation Nuclear chemistry |
| Zdroj: | Journal of Alloys and Compounds. 749:715-723 |
| ISSN: | 0925-8388 |
| Popis: | The high-efficient photocatalytic material Ag3PO4/g-C3N4 was synthesized through calcination and precipitation methods. The physico-chemical properties of the material were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), ultraviolet–visible (UV–Vis) diffuse reflectance spectroscopy (DRS) photoluminescence spectra (PL) and Brunauer-Emmett-Teller (BET) surface area test. The morphology analysis indicated that Ag3PO4 particles were heterogeneously dispersed on the surface of layered g-C3N4. The Ag3PO4/g-C3N4 nanocomposites were applied in the photodegradation of bisphenol A under the visible light irradiation. The effects of the material proportion, the initial concentration of BPA, and the salinity on the degradation were discussed. The results showed that 92.8% bisphenol A (10 mg/L) can be photodegraded under 3 h irradiation by Ag3PO4/g-C3N4 with 25% Ag3PO4 mass ratio. The photodegradation kinetics and possible photocatalytic mechanism were discussed. The active specie ·O2− was found to play a key role during the photocatalytic reaction. The reaction mechanism was described based on valence band, conduction band energy levels and reduction potentials of oxygen and hydroxyl radicals. |
| Databáze: | OpenAIRE |
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