Synthesis of Nano-SnO2 Through Pyrolysis Method and Its Gas Sensitivity Property

Abstract

Abstract: Nanosized SnO₂ powders were synthesized by using the direct pyrolysis means from SnC₂O₄ .The specimens were characterized by TEM, XRD, TG-DTA, FTIR and BET. TEM and XRD showed that the SnO₂ crystallines were less than 8 nm in diameter together with a narrow particle size distribution. BET showed that the surface area of SnO₂ was 115.2 m₂/g. FTIR spectra revealed that the absorptions of Sn—O and —OH bonds in SnO₂ ultrafine powders were red-shifted and broadened. According to the curve of TG-DTA, SnC₂O₄ transformed into SnO₂ completely after being calcined at 250 ℃. Further gas sensing experiments testified that the response and recovery times to C₂H₅OH were shorter than those obtained by the conventional precipitation method.

Key words: Nano-SnO₂, Pyrolysis, FTIR, Sensor, Gas sensitivity property

CLC Number:

O648

TrendMD:

SHI Juan, WU Shi-Hua, ZHANG Shou-Min, HUANG Wei-Ping, WANG Shu-Rong. Synthesis of Nano-SnO₂ Through Pyrolysis Method and Its Gas Sensitivity Property[J]. Chem. J. Chinese Universities, 2004, 25(4): 607.

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Synthesis of Nano-SnO₂ Through Pyrolysis Method and Its Gas Sensitivity Property

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