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Title : Reusability of Photocatalytic CoFe2O4@ZnO Core–Shell Nanoparticles for Dye Degradation
Author :

Dr.Eng. Edi Suharyadi, S.Si., M.Eng. (1) AFIFAH THAHIRAH M (2) NURUL IMANI I (3) DESKA LISMAWENNING P (4) Budi Purnama (5) Dede Djuhana (6)
Date : 11 2022
Keyword : Core-Shell,Magnetic Nanoparticles,Photocatalytic Core-Shell,Magnetic Nanoparticles,Photocatalytic
Abstract : The reusability of CoFe2O4@ZnO core–shell nanoparticles (NPs) for the photocatalytic degradation of methylene blue (MB) under UV radiation was successfully investigated. CoFe2O4@ZnO NPs with various CoFe2O4-to-ZnO concentration ratios were synthesized as magnetic photocatalysts. The X-ray diffraction spectra showed that the NPs had a cubic spinel ferrite phase structure and a hexagonal wurtzite phase of ZnO. Fourier-transform infrared spectra showed the presence of Moct-O, Mtet-O, and Zn-O at 593, 347-389, and 410-429 cm-1, respectively. The CoFe2O4@ZnO NPs had a saturation magnetization of approximately 30 emu/g and a coercivity of approximately 280 Oe. The absorbance spectra showed that the absorbance peak of the CoFe2O4@ZnO NPs broadened and shifted to the right (higher wavelength) with increasing ZnO concentration. The CoFe2O4@ZnO NPs with higher ZnO concentrations exhibited higher photocatalytic activities and degradation rates. The enhancement of MB degradation can be attributed to the formation of an internal structure between CoFe2O4 and ZnO. The degradation rate of CoFe2O4@ZnO decreased slightly after each successive recycle. The results indicated that the recycled CoFe2O4@ZnO NPs could be reused three times for photocatalytic degradation. As there is no significant decrease in the photocatalytic degradation after four successive recycles, the CoFe2O4@ZnO NPs are suitable for application in dye degradation.
Group of Knowledge : Fisika
Original Language : English
Level : Internasional
Status :
Published
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