Journal of the Ceramic Society of Japan
Online ISSN : 1348-6535
Print ISSN : 1882-0743
ISSN-L : 1348-6535
Technical reports
Solvothermal synthesis of ZnO spherical particles and VOC sensor application
Noriko SAITOKenji MATSUMOTOKen WATANABETangi AUBERTFabien GRASSETIsao SAKAGUCHIHajime HANEDA
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2014 Volume 122 Issue 1426 Pages 488-491

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Abstract

We synthesized micrometer-sized ZnO spherical particles solvothermally from the solutions of zinc acetate anhydride, hexamethylenetetramine (HMT), ethylene glycol (EG) and water, and examined the gas sensing properties. The spherical powders were composed of nano particles, which were radially aligned along the c-axis. We obtained particles with smaller crystallites under conditions of higher EG concentrations and shorter reaction period. Spherical powder made of crystallites of 3–5 nm was precipitated in the 95 vol %-EG solvent by heating at 120°C for 4 h. The ZnO powder annealed at 450°C worked as a gas sensor device for volatile organic compounds (VOC) gases. The sensitivity was the best in the case of ethanol gas at 350°C.

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© 2014 The Ceramic Society of Japan
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