Mechanochemical synthesis of nanocrystalline SnO2-ZnO photocatalysts

Dodd, Aaron, McKinley, Allan, Saunders, Martin and Tsuzuki, Takuya 2006, Mechanochemical synthesis of nanocrystalline SnO2-ZnO photocatalysts, Nanotechnology, vol. 17, no. 5, pp. 692-698, doi: 10.1088/0957-4484/17/3/013.

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Title Mechanochemical synthesis of nanocrystalline SnO2-ZnO photocatalysts
Formatted title Mechanochemical synthesis of nanocrystalline SnO2-ZnO photocatalysts
Author(s) Dodd, Aaron
McKinley, Allan
Saunders, Martin
Tsuzuki, Takuya
Journal name Nanotechnology
Volume number 17
Issue number 5
Start page 692
End page 698
Publisher Institute of Physics Publishing
Place of publication Bristol, England
Publication date 2006-02-14
ISSN 0957-4484
Summary Mechanochemical processing of anhydrous chloride precursors with Na2CO3 has been investigated as a means of manufacturing nanocrystalline SnO2 doped ZnO photocatalysts. High-energy milling and heat-treatment of a 0.1SnCl2+0.9ZnCl2+Na2CO3+4NaCl reactant mixture was found to result in the formation of a composite powder consisting of oxide grains embedded within a matrix of NaCl. Subsequent washing with deionized water resulted in removal of the NaCl matrix phase and partial hydration of the oxide reaction product with the consequent formation of ZnSn(OH)6. The extent of this hydration reaction was found to decrease in a linear fashion with the temperature of the post-milling heat-treatment over the range of 400–700 °C. For a heat-treatment temperature of 700 °C, the SnO2 doped ZnO powder was found to exhibit significantly higher photocatalytic activity than either single-phase SnO2 or ZnO powders that were synthesized using similar processing conditions. The heightened photocatalytic activity of the SnO2 doped ZnO was attributed to its higher specific surface area and the enhanced charge separation arising from the coupling of ZnO with SnO2.
Language eng
DOI 10.1088/0957-4484/17/3/013
Field of Research 100708 Nanomaterials
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2006, IOP Publishing Ltd
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