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Synthesis of nanocrystalline SnO2 powder from SnCl4 by mechanochemical processing

✍ Scribed by P. Billik; M. Čaplovičová

Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
777 KB
Volume
191
Category
Article
ISSN
0032-5910

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✦ Synopsis

The rapid synthesis of nanocrystalline SnO 2 powder using a mechanochemical reaction of SnCl 4 (instead of the widely used tin (II) compounds) with (NH 4 ) 2 CO 3 and the subsequent annealing of the product in air and under an H 2 O/NH 3 atmosphere has been investigated using X-ray powder diffraction, TG and TEM. The reaction was complete within 5 min. Additional milling of the product at a higher milling intensity for 120 min led to the crystallisation of tetragonal SnO 2 . The NH 4 Cl salt matrix was removed by annealing at 300 °C. The average crystallite size of tetragonal SnO 2 was in the range of 2-48 nm and it can be controlled by variation heating temperatures and annealing atmospheres in the range of 300-700 °C.

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