TY - JOUR
T1 - SERS assisted monitoring of catalytic reduction reaction using silver-magnetic nanocomposites
AU - Mazhani, Micode
AU - Alula, Melisew Tadele
AU - Murape, Davison
N1 - Funding Information:
This study was financially supported by BIUST initiation grant ( DVC/RDI/2/1/16I(48) awarded to MTA . We are grateful to Dr Nicolette Hendricks-Leukes for the facilities of SEM images, and Mr Mothusi Madiba for XRD analyses.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/6/1
Y1 - 2021/6/1
N2 - In this study, a facile and environmental friendly method was used to synthesise silver nanoparticles coated magnetic nanoparticles (AgNPs@Fe3O4). Silver nanoparticles were deposited on the surface of unmodified magnetic nanoparticles using silver mirror reaction. It avoids surface modification of either the magnetic nanoparticles or silver nanoparticles. The nanocomposites were characterized using scanning electron microscopy (SEM), Energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), Thermogravimetric analysis (TGA), and surface-enhanced Raman spectroscopy (SERS). Following performance optimization based on the reduction of 4-nitrophenol (4-NP) as the model reaction, the as prepared catalyst proved effective in degrading other pollutant dyes such as methylene blue (MB) and Rhodamine 6G (R6G). Moreover, this nanocomposite exhibited SERS effect for real-time monitoring of reduction of 4-nitrothiophenol (4-NTP) using SERS. A recyclability study which could easily be carried out given the magnetic properties of the nanocatalysts revealed the catalytic activity of the particles was maintained without a significant decrease up to eight cycles.
AB - In this study, a facile and environmental friendly method was used to synthesise silver nanoparticles coated magnetic nanoparticles (AgNPs@Fe3O4). Silver nanoparticles were deposited on the surface of unmodified magnetic nanoparticles using silver mirror reaction. It avoids surface modification of either the magnetic nanoparticles or silver nanoparticles. The nanocomposites were characterized using scanning electron microscopy (SEM), Energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), Thermogravimetric analysis (TGA), and surface-enhanced Raman spectroscopy (SERS). Following performance optimization based on the reduction of 4-nitrophenol (4-NP) as the model reaction, the as prepared catalyst proved effective in degrading other pollutant dyes such as methylene blue (MB) and Rhodamine 6G (R6G). Moreover, this nanocomposite exhibited SERS effect for real-time monitoring of reduction of 4-nitrothiophenol (4-NTP) using SERS. A recyclability study which could easily be carried out given the magnetic properties of the nanocatalysts revealed the catalytic activity of the particles was maintained without a significant decrease up to eight cycles.
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U2 - 10.1016/j.matchemphys.2021.124487
DO - 10.1016/j.matchemphys.2021.124487
M3 - Article
AN - SCOPUS:85102977377
SN - 0254-0584
VL - 265
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
M1 - 124487
ER -