Two-step solid-state synthesis of tin oxide and its gas-sensing property

Tin oxide (SnO 2) nanocrystals have been synthesized by two-step solid-state reactions. In the first step, the SnO fine particles are synthesized from the reaction of SnCl 2·2H 2O precursor with KOH in the size range of ca. 500 nm. Then the fine particles are oxidized into nano-sized SnO 2 crystals...

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Veröffentlicht in:	Materials chemistry and physics 2002-01, Vol.73 (2), p.335-338
Hauptverfasser:	Li, Feng, Chen, Liying, Chen, Zhiqiang, Xu, Jiaqiang, Zhu, Jianmin, Xin, Xinquan
Format:	Artikel
Sprache:	eng
Schlagworte:	Cross-disciplinary physics: materials science rheology Exact sciences and technology Gas sensing properties Materials science Nanocrystals Nanoscale materials and structures: fabrication and characterization Physics Solid-state reactions Synthesis Tin oxide
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Beschreibung
Zusammenfassung:	Tin oxide (SnO 2) nanocrystals have been synthesized by two-step solid-state reactions. In the first step, the SnO fine particles are synthesized from the reaction of SnCl 2·2H 2O precursor with KOH in the size range of ca. 500 nm. Then the fine particles are oxidized into nano-sized SnO 2 crystals with O 2. It is an environment friendly, convenient, inexpensive and efficient preparation of SnO 2 nanocrystals with grain size of ca. 20 nm. The prepared SnO 2-based gas sensors have an excellent ability of discriminating EtOH from gasoline.
ISSN:	0254-0584 1879-3312
DOI:	10.1016/S0254-0584(01)00357-1