Influence of source concentration on structural and optical properties of SnO2 nanoparticles prepared by chemical precipitation method

Saravanakumar, M and Agilan, S and Muthukumarasamy, N and Marusamy, A and Prabaharan, K and Ranjitha, A and Maheshwari, Uma P (2014) Influence of source concentration on structural and optical properties of SnO2 nanoparticles prepared by chemical precipitation method. In: INDIAN JOURNAL OF PHYSICS, 88 (8). pp. 831-835.

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Abstract

In present work, a systematic study has been carried out to understand the influence of source concentration on structural and optical properties of the SnO2 nanoparticles. SnO2 nanoparticles have been prepared by using chemical precipitation method at room temperature with aqueous ammonia as a stabilizing agent. X-ray diffraction analysis reveals that SnO2 nanoparticles exhibit tetragonal structure and the particle size is in range of 4.9-7.6 nm. High resolution transmission electron microscopic image shows that all the particles are nearly spherical in nature and particle size lies in range of 4.6-7 nm. Compositional analysis indicates the presence of Sn and O in samples. Blue shift has been observed in optical absorption spectra due to quantum confinement and the bandgap is in range of 4-4.16 eV. The origin of photoluminescence in SnO2 is found to be due to recombination of electrons in singly occupied oxygen vacancies with photo-excited holes in valance band.

Item Type:	Journal Article
Publication:	INDIAN JOURNAL OF PHYSICS
Publisher:	INDIAN ASSOC CULTIVATION SCIENCE
Additional Information:	Copyright for this article belongs to the INDIAN ASSOC CULTIVATION SCIENCE, INDIAN J PHYSICS, JADAVPUR, KOLKATA 700 032, INDIA
Keywords:	Semiconductor nanoparticles; SnO2 nanoparticles; HRTEM; Optical properties
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	20 Dec 2014 05:54
Last Modified:	20 Dec 2014 05:54
URI:	http://eprints.iisc.ac.in/id/eprint/50491

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