Open AccessGreen synthesis of Bryophyllum pinnatum aqueous leaf extract mediated bio-molecule capped dilute ferromagnetic α-MnO2 nanoparticles
Author(s) -
A. K. M. Atique Ullah,
Md. Mohafizul Haque,
Mahmuda Akter,
Aslam Hossain,
Afrin N. Tamanna,
Mottaleb Hosen,
A.K.M. Fazle Kibria,
M. N. I. Khan,
Mashooq Khan
Publication year - 2020
Publication title -
materials research express
Language(s) - English
Resource type - Journals
ISSN - 2053-1591
DOI - 10.1088/2053-1591/ab6c20
Subject(s) - nanoparticle , thermogravimetric analysis , aqueous solution , materials science , fourier transform infrared spectroscopy , transmission electron microscopy , ferromagnetism , molecule , nuclear chemistry , differential scanning calorimetry , tetragonal crystal system , scanning electron microscope , magnetic nanoparticles , analytical chemistry (journal) , chemical engineering , crystallography , nanotechnology , chemistry , organic chemistry , crystal structure , physics , quantum mechanics , engineering , composite material , thermodynamics
Bio-molecule capped α -MnO 2 nanoparticles have been successfully synthesized from the reduction of KMnO 4 via a facile green synthesis route using an aqueous leaf extract of Bryophyllum pinnatum as a reducing and capping agent. The synthesized α -MnO 2 nanoparticles were characterized by x-ray diffraction (XRD), Fourier transform—infrared (FT-IR), energy dispersive x-ray (EDX), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), thermogravimetric (TG) and differential scanning calorimetry (DSC) techniques. Experimental results clearly demonstrate the successful synthesis of bio-molecule capped crystalline tetragonal α -MnO 2 nanoparticles with the size of 4–18 nm. The magnetic property of the product was evaluated using a vibrating sample magnetometer (VSM) and the result reveals that the presently synthesized bio-molecule capped α -MnO 2 nanoparticles exhibit ferromagnetic property at room temperature.