Preparation and application of separable magnetic Fe3O4-SiO2-APTES-Ag2O composite particles with high visible light photocatalytic performance. Issue 1 (February 2018)

• Record Type: Journal Article
• Authors: Jiang, Wei; Sun, Fujin; Zeng, Ya; Zeng, Qihui; Zhang, Tao; Tian, Wen; Liang, Bin
• Is Part Of: Journal of environmental chemical engineering. Volume 6:Issue 1(2018)
• Page Start: 945
• Page End: 954
• Publication Date: 2018-02
• Subjects: Magnetic separation -- Silver oxide -- Ferroferric oxide -- Magnetic continuous photoreactor -- Recovery rate; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2018.01.022
• Languages: English
• ISSNs: 2213-2929

Abstract

Abstract: 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, Fe3 O4 -SiO2 -APTES-Ag2 O, was prepared and evaluated. Results show that the obtained composite possesses equivalent photocatalytic performance to the pure Ag2 O 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 Ag2 O. Evaluations of the Fe3 O4 -SiO2 -APTES-Ag2 O 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.