TY - JOUR
T1 - Structural characterization and adsorptive ability of green synthesized Fe3O4 nanoparticles to remove Acid blue 113 dye
AU - Pai, Shraddha
AU - Kini, Srinivas M.
AU - Narasimhan, Manoj Kumar
AU - Pugazhendhi, Arivalagan
AU - Selvaraj, Raja
N1 - Funding Information:
The authors thankfully acknowledge the Department of Chemical Engineering, Manipal Institute of Technology (MIT), Manipal Academy of Higher Education (MAHE), Manipal, Karnataka for providing research facilities to carry out this research work. Also, they acknowledge Nanotechnology Research Centre (NRC), SRMIST, for providing the research facilities.
Publisher Copyright:
© 2021 Elsevier B.V.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/4
Y1 - 2021/4
N2 - In the current study, Thunbergia grandiflora (Bengal clock vine) leaf extract has been used as green-resource to prepare Fe3O4 nanoparticles. SEM image showed agglomerated spherical (25 nm) particles, and EDS ascertained the existence of elemental iron (between 6 – 7 k eV) and oxygen (at 0.5 keV). XRD and XPS designated signature peaks for Fe3O4. BET studies revealed a high specific surface area of 114.42 m2/g with mesoporous structure. FTIR showed the distinct band for iron-oxide at 542 cm−1. A very low coercivity (1.5812 Oe) and retentivity (2.216 memu/g) indicated the paramagnetic properties of Fe3O4 nanoparticles. Batch adsorption of Acid blue 113 considering several factors conceded 95% removal within 3.5 h of contact time at pH 2 with the adsorbent dosage of 1 g/L, the concentration of 25 mg/L, 150 rpm, and the temperature of 303 K. The pseudo-second-order equation was best suited for the adsorption data indicating chemisorption. Freundlich isotherm model indicated a good fit for the equilibrium data. Thermodynamic parameters indicated exothermicity and spontaneity of the adsorption process. The maximum sorption capacity gained under an optimized environment was 138.89 mg/g. Hence, this study convincingly recognized the feasibility of the green synthesized Fe3O4 adsorbent for efficient Acid blue 113 dye removal with a suggestively greater sorption capacity.
AB - In the current study, Thunbergia grandiflora (Bengal clock vine) leaf extract has been used as green-resource to prepare Fe3O4 nanoparticles. SEM image showed agglomerated spherical (25 nm) particles, and EDS ascertained the existence of elemental iron (between 6 – 7 k eV) and oxygen (at 0.5 keV). XRD and XPS designated signature peaks for Fe3O4. BET studies revealed a high specific surface area of 114.42 m2/g with mesoporous structure. FTIR showed the distinct band for iron-oxide at 542 cm−1. A very low coercivity (1.5812 Oe) and retentivity (2.216 memu/g) indicated the paramagnetic properties of Fe3O4 nanoparticles. Batch adsorption of Acid blue 113 considering several factors conceded 95% removal within 3.5 h of contact time at pH 2 with the adsorbent dosage of 1 g/L, the concentration of 25 mg/L, 150 rpm, and the temperature of 303 K. The pseudo-second-order equation was best suited for the adsorption data indicating chemisorption. Freundlich isotherm model indicated a good fit for the equilibrium data. Thermodynamic parameters indicated exothermicity and spontaneity of the adsorption process. The maximum sorption capacity gained under an optimized environment was 138.89 mg/g. Hence, this study convincingly recognized the feasibility of the green synthesized Fe3O4 adsorbent for efficient Acid blue 113 dye removal with a suggestively greater sorption capacity.
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U2 - 10.1016/j.surfin.2021.100947
DO - 10.1016/j.surfin.2021.100947
M3 - Article
AN - SCOPUS:85099823072
SN - 2468-0230
VL - 23
JO - Surfaces and Interfaces
JF - Surfaces and Interfaces
M1 - 100947
ER -