Two-step synthesis and ethanol sensing properties of Zn2SnO4SnO2 nanocomposites
Two-step synthesis and ethanol sensing properties of Zn2SnO4SnO2 nanocomposites
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DOI：
10.1016/j.matchemphys.2004.11.029
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发表时间：
2005-07
影响因子：
4.6
通讯作者：
Zhou-guang Lu;You-gen Tang
中科院分区：
文献类型：
--
作者：
Zhou-guang Lu;You-gen Tang
以PVP为表面活性剂，水热法制备了边长约为30 nm的ZnSn（OH）6纳米立方体前驱体。纳米立方体前体在惰性气体保护下在800°C的温度下的热分解导致形成Zn 2SnO 4-SnO 2的超细纳米颗粒。所产生的纳米颗粒大致为球形且结构多孔。电导率测量表明，基于该材料的薄膜型传感器对乙醇具有高灵敏度和耐久性，在300°C的工作温度下具有最佳的传感性能。传感器元件的响应在高于500 ppm的乙醇浓度时趋于饱和。
Nearly monodispersed ZnSn(OH)6nanocubes of about 30nm in edge length as precursors are hydrothermally prepared in the presence of PVP surfactant. Thermal decomposition of the nanocube precursors at a temperature of 800°C under inert gas protection leads to the formation of ultrafine nanoparticles of Zn2SnO4–SnO2. The as-produced nanoparticles are roughly spherical and structurally porous. The electrical conductivity measurements demonstrate that thin-film type sensor based on this material has high sensitivity and durability to ethanol, with its optimized sensing properties at a working temperature of 300°C. Response of the sensor element tends to saturate above an ethanol concentration of 500ppm.