Influence of Iron Doping on Structural and Optical Properties of Nickel Oxide Nanoparticles

¹Department of Physics, Govt. General Degree College, Muragachha, Nadia, W.B. 741154, India

²Sensor and Actuator Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata, W.B. 700032, India

Adv. Mater. Lett., 2019, 10 (10), pp 746-751

DOI: 10.5185/amlett.2019.0004

Publication Date (Web): Mar 11, 2019

Copyright © IAAM-VBRI Press

E-mail: nashiruddin73@gmail.com

Abstract

In this article, auto combustion prepared Ni_1-xFe_xO (0≤x≤0.10) nanoparticles (NPs) have been investigated for their structural, morphological and optical properties. X-ray diffraction (XRD) studies reveal that all Fe doped NiO samples crystallize in single phase without any impurity. The crystallite size monotonically decreases from 20 nm to 10 nm with increasing Fe substitution. Transmission Electron Microscope images represent that the synthesized NiO NPs with size around 28 nm. A red shift in UV-Vis spectra indicates that band gap can be tuned by Fe doping from 3.76 eV to 2.51 eV because of the upward shifting of t_2g level.  The broad transmittance peak in Fourier transform infra-red spectra at 500 cm^-1 is assigned to Ni–O stretching vibration mode. Differential scanning calorimetry curve revealed that the transition at 250 ^oC was exothermic because of structural relaxation.  © VBRI Press.

Keywords

Nickel oxide nanoparticle, XRD, TEM, band gap.