Preparation and application of separable magnetic Fe3O4-SiO2-APTES-Ag2O composite particles with high visible light photocatalytic performance
| Autor: | Ya Zeng, Bin Liang, Tao Zhang, Wen Tian, Wei Jiang, Qihui Zeng, Fujin Sun |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Process Chemistry and Technology Batch reactor Composite number Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Pollution 0104 chemical sciences chemistry.chemical_compound Chemical engineering chemistry Titanium dioxide Photocatalysis Methyl orange Chemical Engineering (miscellaneous) Degradation (geology) 0210 nano-technology Waste Management and Disposal Silver oxide |
| Zdroj: | Journal of Environmental Chemical Engineering. 6:945-954 |
| ISSN: | 2213-3437 |
| Popis: | Silver oxide is a potential visible-light driven photocatalyst for the degradation of organic pollutants, but its high cost and energy intensive recovery limit its future applications. In this study, a magnetic core-shell composite, Fe3O4-SiO2-APTES-Ag2O, was prepared and evaluated. Results show that the obtained composite possesses equivalent photocatalytic performance to the pure Ag2O under visible light irradiation. Phenol and methyl orange can be effectively photodegraded with the composite catalyst in 10 min. The used composite can be efficiently separated with greater than a 98.95% recovery rate in 5 s with a 330 mT magnetic field after four cycles. In addition, the composite only exhibited negligible performance decay due to the slight loss of loaded Ag2O. Evaluations of the Fe3O4-SiO2-APTES-Ag2O composite performance in a batch reactor, a semi-continuous reactor, and a continuous magnetic agglomeration reactor with methyl orange, all confirm the superb performance, stability, and separability of this magnetic composite photocatalyst. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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