Spectroscopic and Superparamagnetic Behaviour of Hausmannite Manganese Oxide Nanoparticles

Abstract

Hausmannite manganese oxide (Mn3O4) nanoparticles are synthesized by microwave assisted solvothermal method. The calcination temperature of manganese oxide was determined from TG-DTA analysis.The structural characteristics of as prepared Mn3O4 nanoparticles are analyzed by powder X-ray diffraction. The Fourier transform infrared analysis is used to identify molecular structural changes of the manganese oxide sample. The SEM images revealed the surface morphology of the Mn3O4 nanoparticles and determined the size of the particle to be in the range of 30-40 nm. UV-visible spectrum showed that pure Mn3O4 nanoparticle exhibits maximum absorption at 396 nm. The cyclic voltammetry studies are used to evaluate specific capacitance and electrochemical behaviour of Mn3O4 nanoparticles. The magnetic properties of Mn3O4 nanoparticles are examined by vibrating sample magnetometer.

Phase tunable nickel doped Mn3O4 nanoparticle synthesis by chemical precipitation: kinetic study on dye degradation

“…But in the case of 10% doping concentration, the crystallite size suddenly increases which means that it experiences lower internal stress due to the formation of mixed phases. 48,49 Fourier-transform infrared spectroscopy (FT-IR) analysis. The FT-IR spectra depicted in Fig.…”

Enhancement of Structural, Optical and Electrical Properties of Manganese Doped Stannic Oxide Nanoparticles

“…The resultant nanoparticle was collected by drying the solution up to the formation of precipitate in microwave oven. The unwanted organic impurities are removed from the precipitate by washing with double distilled water and acetone (Karpagavalli, S, et al, 2019). The resultant nanoparticles were annealed at 400 o C to get stannic oxide nanoparticle.…”