TY - JOUR
T1 - Enhanced Wide Spectrum Photocatalytic Activity by in-Situ Magnetite-Graphite Nanoplatelets Heterostructure
AU - Sameera, S. A.L.
AU - Edirisinghe, N. P.
AU - Kannangara, Yasun Y.
AU - Karunarathne, Shadeepa
AU - Koswattage, K. R.
AU - Perera, H. C.S.
AU - Das, G.
AU - Mantilaka, M. M.M.G.P.G.
AU - Wijesinghe, W. P.S.L.
N1 - Publisher Copyright:
© 2013 IEEE.
PY - 2023
Y1 - 2023
N2 - A UV, visible and NIR range irradiation responsive magnetite/graphite nanoplatelets composite was successfully synthesised via a single-step facile in-situ electrochemical exfoliation method using natural vein graphite. The spectral analysis revealed that as-synthesised photocatalyst could rapidly degrade the organic dyes with 96.1, 78.0 and 82.6 % efficiency in 120 minutes under respective UV, Visible, and NIR ranges of the electromagnetic spectrum. The formation of the magnetite-graphite nanoplatelet (GNP) nanocomposite was verified with X-ray diffraction (XRD), Fourier transform infrared absorption spectroscopy (FTIR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and atomic force microscopy (AFM) analysis. The scaffold of highly electrically conductive GNP helps magnetite nanoparticles for the efficient distribution of photoinduced electrons generated by the photocatalytic activity to participate in the photodegradation of organic dyes, through rapid superoxide radical formation. The current work presents a hypothesized mechanism for the photocatalyst composite synthesis, while a thorough discussion was made on the improvements in photocatalytic degradation kinetics under multiple irradiation conditions through the synergy of the magnetite and GNP. High efficiency, low-cost facile synthesis, easy up scalability, and the easy removal of the catalyst as needed via an external magnetic field can be identified as major benefits of as-synthesised green catalyst, which can be readily used in dye pollutant removal and wastewater treatment applications.
AB - A UV, visible and NIR range irradiation responsive magnetite/graphite nanoplatelets composite was successfully synthesised via a single-step facile in-situ electrochemical exfoliation method using natural vein graphite. The spectral analysis revealed that as-synthesised photocatalyst could rapidly degrade the organic dyes with 96.1, 78.0 and 82.6 % efficiency in 120 minutes under respective UV, Visible, and NIR ranges of the electromagnetic spectrum. The formation of the magnetite-graphite nanoplatelet (GNP) nanocomposite was verified with X-ray diffraction (XRD), Fourier transform infrared absorption spectroscopy (FTIR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and atomic force microscopy (AFM) analysis. The scaffold of highly electrically conductive GNP helps magnetite nanoparticles for the efficient distribution of photoinduced electrons generated by the photocatalytic activity to participate in the photodegradation of organic dyes, through rapid superoxide radical formation. The current work presents a hypothesized mechanism for the photocatalyst composite synthesis, while a thorough discussion was made on the improvements in photocatalytic degradation kinetics under multiple irradiation conditions through the synergy of the magnetite and GNP. High efficiency, low-cost facile synthesis, easy up scalability, and the easy removal of the catalyst as needed via an external magnetic field can be identified as major benefits of as-synthesised green catalyst, which can be readily used in dye pollutant removal and wastewater treatment applications.
KW - dye pollutants
KW - electrochemical synthesis
KW - Magnetite graphite nanoplatelets
KW - photocatalysis
KW - wastewater treatment
UR - https://www.scopus.com/pages/publications/85163424066
U2 - 10.1109/ACCESS.2023.3290029
DO - 10.1109/ACCESS.2023.3290029
M3 - Article
AN - SCOPUS:85163424066
SN - 2169-3536
VL - 11
SP - 68912
EP - 68924
JO - IEEE Access
JF - IEEE Access
ER -
