Synthesis of Tin Oxide Through Thermal Decomposition of Sn2 (NH4)2 (C2 O4)3 and Its Gas Sensing Property

Abstract

Abstract: Nanocrystalline tin oxide samples were prepared by using Sn₂ (NH₄)₂ (C₂O₄)₃ as the precursor.The thermal decompositions were respectively conducted at 250,450 and 650 ℃.TG-DTA, XRD, TEM, FTIR were used to characterize the samples.The indirect heating sensors by using these materials as sensitive bodies were fabricated on an alumina tube with Au electrodes and platinum wires.Sensing properties of these sensors were investigated.It was found that the tin oxide sample obtained by thermal decomposition at 450 ℃ has a higher sensitivity to C₂ H₅ OH and a higher selectivity to hexane and ammonia than those obtained via the conventional precipitate method and the working temperatures needed were greatly decreased.

Key words: Tin dioxide, Thermal decomposition, Gas sensing property, Selectivity

SHI Juan, WU Shi-hua, WANG Shu-rong. Synthesis of Tin Oxide Through Thermal Decomposition of Sn₂ (NH₄)₂ (C₂ O₄)₃ and Its Gas Sensing Property[J]. Chemical Research in Chinese Universities, 2005, 21(6): 641-645.

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Synthesis of Tin Oxide Through Thermal Decomposition of Sn₂ (NH₄)₂ (C₂ O₄)₃ and Its Gas Sensing Property

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