To study the effect of dopant NiO concentration and duration of calcinations on structural and optical properties of MgO-NiO nanocomposites

Journal Article · Fri May 06 00:00:00 EDT 2016 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4946244· OSTI ID:22591341

Kumar, Rajesh ^[1]; Praveen,; Sharma, Ashwani; Parmar, R.; Dahiya, S. ^[1]; Kishor, N. ^[2]

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1. Deptt. of Physics, M.D. University, Rohtak-124001, Haryana (India)
2. Deptt. of Physics, Central University of Haryana (India)

In present work Magnesium oxide (MgO) samples were doped with different concentration of Transition metal Nickel Oxide(NiO) by using Chemical co-precipitation method. The doping levels were varied from NiO (5%, 10%, 15%) and all the samples were calcined at 600°C for 4hrs and 8hrs respectively. Structural analysis of these calcined materials is carried out by X-ray diffraction (XRD) techniques which reveals that average crystalline sizes are in nano region i.e. 21.77nm-31.13 nm and tabulated in table 1. The powder of calcined samples were also characterized by using various other techniques i.e. Scanning Electron Microscopy (SEM), Fourier Transformation Infrared Spectroscopy (FTIR), UV-Visible spectroscopy, Transmission Electron Microscopy (TEM) etc. The effects of dopant concentration, calcined temperature, calcinations duration on samples were studied and also investigate the effect of varying dopant concentration on morphology and optical properties of calcined nanomaterials. From results it was observed that the crystallite size of nanocomposites increases with increases dopant concentration or increases calcinations duration. The optical band gap decreases with increases sintering time and increase with increases dopant concentrations. TEM results coincide with XRD results and show that particles are polycrystalline in nature. FTIR spectra show that for all samples particles are pure in composition and transmission rate increases with calcinations duration.

• OSTI ID: 22591341
• Journal Information: AIP Conference Proceedings, Vol. 1728, Issue 1; Conference: ICC 2015: International conference on condensed matter and applied physics, Bikaner (India), 30-31 Oct 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION SPECTROSCOPY
CALCINATION
CONCENTRATION RATIO
COPRECIPITATION
DOPED MATERIALS
FOURIER TRANSFORMATION
INFRARED SPECTRA
MAGNESIUM OXIDES
MORPHOLOGY
NANOCOMPOSITES
NICKEL OXIDES
OPTICAL PROPERTIES
POLYCRYSTALS
POWDERS
SCANNING ELECTRON MICROSCOPY
SINTERING
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION