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New Magnetically Recyclable Reduced Graphene Oxide rGO/MFe 2 O 4 (M= Ca, Mg)/Ag 3 PO 4 Nanocomposites With Remarkably Enhanced Visible‐light Photocatalytic Activity and Stability
Author(s) -
Bagherzadeh Mojtaba,
Kaveh Reyhaneh
Publication year - 2018
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/php.12968
Subject(s) - photocatalysis , visible spectrum , methyl orange , graphene , aqueous solution , materials science , oxide , nanocomposite , hydrothermal circulation , methylene blue , irradiation , degradation (telecommunications) , nuclear chemistry , chemical engineering , nanotechnology , chemistry , catalysis , organic chemistry , metallurgy , physics , optoelectronics , computer science , nuclear physics , engineering , telecommunications
New magnetically separable CaFe 2 O 4 /Ag 3 PO 4 , MgFe 2 O 4 /Ag 3 PO 4 , rGO/CaFe 2 O 4 /Ag 3 PO 4 and rGO/MgFe 2 O 4 /Ag 3 PO 4 photocatalysts were synthesized by the hydrothermal and ion‐exchange deposition method. These four types of photocatalyst were used for degradation of Methylene blue (MB), Methyl orange (MO) and 4‐chlorophenol (4‐CP) in aqueous solution under visible‐light illumination. The optimized photocatalyst, i.e . rGO/CaFe 2 O 4 /Ag 3 PO 4 with a mass ratio of (1:3:9) composite not only shows the highest photocatalytic performance for the degradation of MB, MO and 4‐CP under visible light irradiation among the other synthesized photocatalysts but also exhibits high reusability and stability for at least five cycles. It was found that the impressive separation of electron–hole pairs as well as presence of rGO sheets which act as a high speed charge transfer were responsible for increasing photocatalytic activity over the optimized photocatalyst under visible‐light irradiation. A possible mechanism for the increased photocatalytic activity of the rGO/CaFe 2 O 4 /Ag 3 PO 4 with a mass ratio of (1:3:9) composite was discussed in detail.