热解法制备纳米SnO_2及其气敏性能研究  

Synthesis of Nano-SnO_2 Through Pyrolysis Method and Its Gas Sensitivity Property

作　　者：石娟[1] 吴世华[1] 张守民[1] 黄唯平[1] 王淑荣[1] 

机构地区：[1]南开大学化学系

出　　处：《高等学校化学学报》2004年第4期607-609,共3页Chemical Journal of Chinese Universities

摘　　要：Nanosized SnO 2 powders were synthesized by using the direct pyrolysis means from SnC 2O 4 .The specimens were characterized by TEM, XRD, TG-DTA, FTIR and BET. TEM and XRD showed that the SnO 2 crystallines were less than 8 nm in diameter together with a narrow particle size distribution. BET showed that the surface area of SnO 2 was 115.2 m 2/g. FTIR spectra revealed that the absorptions of Sn—O and —OH bonds in SnO 2 ultrafine powders were red-shifted and broadened. According to the curve of TG-DTA, SnC 2O 4 transformed into SnO 2 completely after being calcined at 250 ℃. Further gas sensing experiments testified that the response and recovery times to C 2H 5OH were shorter than those obtained by the conventional precipitation method.Nanosized SnO 2 powders were synthesized by using the direct pyrolysis means from SnC 2O 4 .The specimens were characterized by TEM, XRD, TG-DTA, FTIR and BET. TEM and XRD showed that the SnO 2 crystallines were less than 8 nm in diameter together with a narrow particle size distribution. BET showed that the surface area of SnO 2 was 115.2 m 2/g. FTIR spectra revealed that the absorptions of Sn—O and —OH bonds in SnO 2 ultrafine powders were red-shifted and broadened. According to the curve of TG-DTA, SnC 2O 4 transformed into SnO 2 completely after being calcined at 250 ℃. Further gas sensing experiments testified that the response and recovery times to C 2H 5OH were shorter than those obtained by the conventional precipitation method.

关 键 词：纳米氧化锡 制备 热解法 气敏性能 电阻式气敏传感器 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置] O614.432[自动化与计算机技术—控制科学与工程]