Synthesis of Nanostructured Tin Oxide (SnO2) Powders and Thin Films by Sol-Gel Method

Authors	Ashok D. Bhagwat¹^,², Sachin S. Sawant¹^,³, Balaprasad G. Ankamwar⁴, Chandrashekhar M. Mahajan³
Affiliations	¹ Singhania University, Pacheri Bari, Jhunjhunu – 333515, Rajasthan, India ² Dnyanshree Institute of Engineering and Technology, Satara – 415013, Maharashtra, India ³ Department of Engineering Sciences and Humanities, Vishwakarma Institute of Technology, Pune – 411037, Maharashtra, India ⁴ Department of Chemistry, Savitribai Phule Pune University, Ganeshkhind, Pune, 411007, India
Е-mail	c_mahajan9@yahoo.com
Issue	Volume 7, Year 2015, Number 4
Dates	Received 09 July 2015; revised manuscript received 08 December 2015; published online 10 December 2015
Citation	Ashok D. Bhagwat, Sachin S. Sawant, Balaprasad G. Ankamwar, Chandrashekhar M. Mahajan, J. Nano- Electron. Phys. 7 No 4, 04037 (2015)
DOI
PACS Number(s)	16.05.C, 61.82.Rx, 68.37.Hk, 81.20.Fw
Keywords	Bandgap (5) , Metal oxide (4) , Tin oxide (8) , nanocrystallites, Sol-gel (17) .
Annotation	Nanocrystalline SnO2 powder was successfully prepared by using simple sol-gel technique. The sol-gel obtained was washed and calcinated at 400 C to obtain the SnO2 nano-powder. The structural property of (SnO2) nanocrystalline powder was investigated by using X-ray diffraction (XRD) technique. The optical properties were studied using Uv-Vis Spectroscopy, by recording the absorbance and transmittance spectra. The XRD pattern of the as-prepared sample demonstrated the formation of a rutile structure of SnO2 nanocrystallites. The Scanning Electron Microscopic (SEM) analysis showed a homogeneous distribution of quite small grains over scanned area. The Uv-Vis absorbance spectra also showed a characteristic peak of absorbance at   312 nm corresponding to SnO2. The energy band gap measurement for nanocrystalline SnO2 thin film was done from the graph of variation of (hν)2 versus hν. The measured value of optical bandgap energies for SnO2 thin film is 3.78 eV. The results show that the transmittance of the synthesized SnO2 film is 78 % in the spectral range 350 nm to 800 nm.
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