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Optical and Structural Properties of Sn doped Cr2O3 Metal Oxide Nanoparticles by Co-Precipitation Method

Nitu Singh, Dharmendra Singh, Surendra Pratap Singh and Aarti Malhosia


In this paper, the enhancement of optical and structural properties due to addition of tin into Cr2O3 nanoparticles has been reported. Tin doped Chromium oxide nanoparticles (NPs) were successfully prepared by a co-precipitation method. The impact of the added dopant (Sn) on the Cr2O3 nanoparticles was investigated by their phase composition, and crystal structure properties and grain size imaging were characterized by X-ray diffraction (XRD), Atomic Force Microscopy (AFM). Optical and chemical composition in pure and dopant materials were identified from the UV-visible and, Photoluminescence (PL) Fourier transform infrared spectroscopy (FTIR). The crystallite sizes determined by using the Scherrer’s formula were found to in decrease order pure and Sn (2, 4, 6 & 8%wt) doped Cr2O3 powders respectively. UV-Vis spectroscopy shows the energy band gap < 4.0 eV, and Photoluminescence shows peaks around 400 – 550 nm. The emission is in the visible region.

Keywords: Co-Precipitation, Nanoparticles (NPS), Chemical Composition, Pure and Dopant, And Peaks etc.

Posted in Volume 5, Issue No. 2 (April - June 2023)

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