NDLI: Starch-assisted sol–gel synthesis of magnetic CuFe$_{2}$O$_{4}$ powder as photo-Fenton catalysts in the presence of oxalic acid

Content Provider	Springer Nature Link
Author	Dinh, Thi Thao Tran, Hon Quoc Nguyen, To Quyen Quan, Gia Co Nguyen, Vo Dong Nghi Le, Tien Khoa
Copyright Year	2017
Abstract	Magnetic photo-Fenton catalysts based on spinel CuFe$_{2}$O$_{4}$ were successfully prepared by the starch-assisted sol–gel method. Various synthetic conditions such as annealing temperatures (700, 800 and 900 °C) and molar ratios of Cu$^{2+}$/Fe$^{3+}$/C$_{6}$H$_{10}$O$_{5}$ in the precursor solution (from 1:2:2 to 1:2:4) were, respectively, used in order to study the influences of annealing temperatures and precursor starch contents on the magnetic and catalytic properties of CuFe$_{2}$O$_{4}$ powders. The photo-Fenton catalytic activity was evaluated via the degradation of methylene blue under ultraviolet and visible irradiation with H$_{2}$C$_{2}$O$_{4}$ as a new oxidizing agent. According to the results, when the annealing temperature increased to 800 °C, the spinel CuFe$_{2}$O$_{4}$ phase amount was increased, which strongly enhances the photo-Fenton catalytic performance. However, above 800 °C, the catalytic activity was reduced, due to the increase in particle size. The starch content also affected the surface Cu$^{2+}$ content and the particle size of catalysts. The catalyst prepared at 800 °C with the molar Cu$^{2+}$/Fe$^{3+}$/C$_{6}$H$_{10}$O$_{5}$ ratio of 1:2:3 presented the best photo-Fenton performance, owing to its highest surface Cu$^{2+}$ content. This catalyst also exhibits ferromagnetic properties (saturation magnetization of 25.836 emu/g and coercivity of 1010.23 Oe), which allows them to be easily separated from the solution by a magnet.
Starting Page	2613
Ending Page	2622
Page Count	10
File Format	PDF
ISSN	17351472
Journal	International Journal of Environmental Science & Technology
Volume Number	14
Issue Number	12
e-ISSN	17352630
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2017-05-04
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Particle size Magnetic powder Ecotoxicology Water Management Ultraviolet A irradiation Waste Water Technology H$_{2}$C$_{2}$O$_{4}$ Photo-Fenton catalysis Aquatic Pollution CuFe$_{2}$O$_{4}$ Starch-assisted sol–gel method Environment Water Pollution Control Environmental Chemistry Environmental Science and Engineering Soil Science & Conservation
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Environmental Engineering Agricultural and Biological Sciences

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