Novel Synthesis of Pure and Zinc-doped Tin Dioxide by using Urea-based Solvent
Subject Areas : journal of New MaterialsMaryam Tohidi 1 , Fatemeh Zahmatkeshani 2
1 - Department of Nanochemical Engineering/ Faculty of Advanced Technologies/ Shiraz University/ Shiraz/ Iran
2 - Department of Nanochemical Engineering, Faculty of Advanced Technologies, Shiraz University, Shiraz, Iran
Keywords: Urea, Tin Dioxide, Zinc-doped Tin Dioxide, Calcination,
Abstract :
Tin dioxide (SnO2) and Zn doped SnO2 structures were synthesized by hydrothermal method. In this method, synthesis of metal oxides was done without using any additives only by selection of new precursors in Urea-based solvent. The applied solvent in this work can be used as size and shape directing agent to prevent further particle growth besides solvent role. Also by decomposition of Urea component of the solvent at 200 °C, the medium became alkali and can help to the production of metal oxide. The calcination process was done for the production of SnO2 and Zn-doped SnO2 after synthesis. The obtained products were characterized by using field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), Fourier transform near IR (FTIR), energy dispersive X-ray (EDS) and UV-Vis spectroscopy. By this method, the products with average sizes of 16 and 18 nm were obtained, respectively for SnO2 and Zn-doped SnO2. No peaks of crystalline impurity phase were observed in the XRD pattern. The calculation showed 3.6 e.V. for band gap energy that related to ultraviolet part of the electromagnetic spectrum.
Keywords: Tin Dioxide, Zinc-doped Tin Dioxide, Urea, Calcination.
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