Green synthesis of MnO2 nanorods using Phyllanthus amarus plant extract and their fluorescence studies

Abstract

The present work describes a facile, convenient, and green pathway for MnO2 nanoparticles (MnNPs) synthesis using manganese acetate salt as a precursor and methanolic extract of Phyllanthus amarus as a reducing agent. Curcumin extracted from turmeric was used as a stabilizing agent. The characterization of MnNPs was performed using ultraviolet-visible (absorption and emission), Fourier transformed-infrared (FT-IR), thermogravimetric analysis, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), and selected area electron diffraction pattern

Exploiting of Green Synthesized Metal Oxide Nanoparticles for Spectrophotometric Determination of Levofloxacin, Cephalexin, and Cefotaxime Sodium in Commercial Products

“…The absorption band located at 579.82 cm −1 was ascribed to the typical collision O–Mn–O vibrations of the prepared MnO 2 [ 61 ]. The recorded spectra revealed a broad band at 3403.64 cm −1 for O–H symmetric stretching frequency vibration and two bands at 2928.64 and 2862.31 cm −1 for C-H vibration stretching vibration bands [ 62 ]. Additionally, the bands at 1597.40 and 1396.30 cm −1 were corresponding to the existence of aromatic unsaturated C=C.…”

“…Additionally, the bands at 1597.40 and 1396.30 cm −1 were corresponding to the existence of aromatic unsaturated C=C. Furthermore, the spectrum showed an absorption band at 1070.07 cm −1 due to the presence of C–O stretching vibration [ 62 ].…”

Green synthesis, characterisation, and photocatalytic activity of manganese dioxide nanoparticles

“…Metal nanoparticles (NPs), due to their excellent surface area to volume ratio, surface energy, spatial confinement and reduced imperfections, have characteristics of physicochemical, electrical, mechanical, magnetic, thermal, dielectric, optical and biological confidants as compared with other materials [5–7]. Manganese oxide NPs have engrossed consideration due to their extensive applications in several fields such as catalysis, ion‐sieves, rechargeable batteries, chemical sensing devices, microelectronics [8] and optoelectronics [9]. Furthermore, due to the existence of numerous attachments for a diversity of usage, they are based against earth extra elements, as Mn is the twelfth most plenty element on the planet and the third most common transition element after Fe and Ti [10].…”