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SnO₂纳米棒一维纳米材料气敏特性研究

Study on the Gas Property of the Sensor Based on SnO₂ Nanorods

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【Author】 ZHAO He-yun 1*,LI Yue-huai2,LIU Qing-ju1,WU Xing-hui1,ZHAO Huai-zhi3 1.Department of Materials Science and Engineering,Yunnan University,Kunming 650091,China;2.Life Science and Chemistry School of DaLi College,DaLi Yunna 671200,China;3.The Precious Metals of Kuanming Institute,Kuanming 650221,China

【机构】云南大学化学与材料工程学院材料科学与工程系；大理学院生命科学与化学院；昆明贵金属研究所昆明650091；云南大理671200；昆明650091；昆明650022；

【摘要】在NaCl+KCl熔盐介质中,在610～760℃焙烧利用室温固相反应合成的SnO2纳米棒前驱物,成功制备了SnO2纳米棒.利用TEM、XRD和XPS对SnO2纳米棒形貌、成分进行了表征和分析,SnO2纳米棒直径为10～60nm,长度从几百个纳米到十几个微米.以SnO2纳米棒为原料,分别制备了厚膜气敏元件,考察了其气敏特性.在工作温度为300℃左右时,660℃焙烧制备的SnO2纳米棒元件对乙醇具有较高的灵敏度、好的选择性和响应恢复特性.更多还原

【Abstract】 SnO₂ nanorods with rutile structure were prepared by calcinedating precursor powders producted by solid state reaction at room temperature.The precursor grows into SnO₂ nanorods via self assembly annealed at 600～ 760℃ in molten salt medium.The structure and morpho1ogy of SnO₂ nanorods were investigated by X-ray difiraction（XRD）,transmission electron microscopy（TEM）and X-ray photoelectron spectrum（XPS）.The gas property of SnO₂ nanorods was studied.The investigation demonstrates that the sensor based on SnO₂ nanorods annealed at 660℃ has high sensitivity,high selectivity and a good response and reversion to C₂H₅OH at 300℃.更多还原