TY - JOUR
T1 - Structural characterization of green synthesized α-Fe2O3 nanoparticles using the leaf extract of Spondias dulcis
AU - Vinayagam, Ramesh
AU - Pai, Shraddha
AU - Varadavenkatesan, Thivaharan
AU - Narasimhan, Manoj Kumar
AU - Narayanasamy, Selvaraju
AU - Selvaraj, Raja
PY - 2020/9
Y1 - 2020/9
N2 - Microporous α-Fe2O3 nanoparticles were synthesized by employing the extract of Spondias dulcis leaves by green-synthesis technique for the first time. The nanoparticles were characterized by many techniques. A continual absorption band without any peak in UV-vis spectrum and a strong signal for iron and oxygen atoms in EDS confirmed the formation of iron-oxide nanoparticles. Rod-like structures with few aggregations due to magnetic interactions were witnessed in FE-SEM image. Specific peaks belonging to α-Fe2O3 nanoparticles were observed in XRD spectrum, and they were very pure and crystalline with a mean particle diameter of 11.38 nm. XPS analysis confirmed oxidation state of Fe and O and portrayed the presence of α-Fe2O3. A relatively higher surface area (190.84 m2/g) than reported green-synthesized α-Fe2O3 nanoparticles has been obtained by BET analysis, and the pores were microscopic (0.465 nm) in nature. Signature bands for Fe-O (1136 cm−1) and organic moieties stretching vibrations were confirmed by FTIR spectrum. The point of zero charge was determined as 7.97 which is concordant with the published value for α-Fe2O3. The thermal stability was ascertained by TGA which showed 28% weight loss. The synthesized α-Fe2O3 were superparamagnetic with a very high saturation magnetization value of 34.46 emu/g. Besides, a probable mechanism for the synthesis of microporous α-Fe2O3 has been proposed. Therefore, the highly pure, crystalline, and microporous α-Fe2O3 with high surface area, synthesized by this green synthesis method could play a significant role in various fields.
AB - Microporous α-Fe2O3 nanoparticles were synthesized by employing the extract of Spondias dulcis leaves by green-synthesis technique for the first time. The nanoparticles were characterized by many techniques. A continual absorption band without any peak in UV-vis spectrum and a strong signal for iron and oxygen atoms in EDS confirmed the formation of iron-oxide nanoparticles. Rod-like structures with few aggregations due to magnetic interactions were witnessed in FE-SEM image. Specific peaks belonging to α-Fe2O3 nanoparticles were observed in XRD spectrum, and they were very pure and crystalline with a mean particle diameter of 11.38 nm. XPS analysis confirmed oxidation state of Fe and O and portrayed the presence of α-Fe2O3. A relatively higher surface area (190.84 m2/g) than reported green-synthesized α-Fe2O3 nanoparticles has been obtained by BET analysis, and the pores were microscopic (0.465 nm) in nature. Signature bands for Fe-O (1136 cm−1) and organic moieties stretching vibrations were confirmed by FTIR spectrum. The point of zero charge was determined as 7.97 which is concordant with the published value for α-Fe2O3. The thermal stability was ascertained by TGA which showed 28% weight loss. The synthesized α-Fe2O3 were superparamagnetic with a very high saturation magnetization value of 34.46 emu/g. Besides, a probable mechanism for the synthesis of microporous α-Fe2O3 has been proposed. Therefore, the highly pure, crystalline, and microporous α-Fe2O3 with high surface area, synthesized by this green synthesis method could play a significant role in various fields.
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U2 - 10.1016/j.surfin.2020.100618
DO - 10.1016/j.surfin.2020.100618
M3 - Article
AN - SCOPUS:85089139919
SN - 2468-0230
VL - 20
JO - Surfaces and Interfaces
JF - Surfaces and Interfaces
M1 - 100618
ER -