The effect of Mn doping on structural, magnetic and optical properties of TiO2 nanoparticles

razeghizadeh, alireza; elahi, elham; rafee, vahdat

doi:10.22034/jna.2018.553380.1053

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	The effect of Mn doping on structural, magnetic and optical properties of TiO2 nanoparticles
Articles in Press, Accepted Manuscript , Available Online from 08 February 2018
Document Type: Original Research Paper
DOI: 10.22034/jna.2018.553380.1053
Authors
alireza razeghizadeh¹; elham elahi²; vahdat rafee ³
¹department of physics, faculty of science payamenoor university, Tehran, Iran.
²Department Physics, Faculty of science, Payamenoor University, IRAN
³department of physics, faculty of science, payamenoor university, tehran, iran
Abstract
The aim of this paper is to study the effect of Mn concentration on the structural, magnetic and optical properties of TiO2 nanoparticles. TiO2 nano powders with Mn concentration of 0%, 0.2%, 1% and 5% were synthesized by the sol-gel method. The structural, surface morphology and average crystal grain size, optical, magnetic properties and chemical compounds of the samples are studied using XRD, FE-SEM, Uv-Vis, VSM and EDX analysis respectively. The results indicate that the samples are crystallized at anatase phase. Also, the average size of the nanoparticles is decreased by increasing Mn doping percent. The study of the optical properties shows that the absorption maximum dislocates toward higher wavelengths by adding Mn to the sample. This shift may be ascribed to the enhanced trapped electron absorption caused by the Mn-doped ions. The optical energy band gap of the doping samples shows significant reduction rather the pure state. The samples show significant paramagnetic behavior when the Mn concentration is 5%.
Keywords
Mn-doped; TiO2 Nano-powders; Sol-gel method; Magnetic properties


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