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氧化铟纳米棒的气敏特性
作者:董向兵 程知萱 潘庆谊 郭冬梅 周蕴倩  
单位:上海大学理学院化学系 上海大学理学院化学系 上海大学理学院化学系 上海大学理学院化学系 上海大学理学院化学系 上海200444 上海200444 上海200444 上海200444 上海200444 
关键词:氧化铟  纳米棒  气敏性能  三甲胺  氢气  介孔 
分类号:O614.372
出版年,卷(期):页码:2006,34(10):1191-1194
DOI:
摘要:
以非离子表面活性剂烷基苯酚聚氧乙烯醚OP-10为形貌控制剂合成In2O3纳米棒。用热重-差示扫描量热法、X射线衍射和透射电镜对In2O3纳米棒的热分解过程、晶体结构和微观形貌进行表征。对纳米棒制得的气敏元件进行气敏性能测试,同时用扫描电子显微镜及比表面积和孔隙度分析仪对元件的表面形貌和材料的介孔结构进行了分析。结果表明:制得的In2O3为立方晶型的纳米棒,直径约20nm,长度约120nm。与In2O3纳米颗粒气敏性能相比,In2O3纳米棒对三甲胺具有更高的灵敏度和选择性。用In2O3纳米棒制的气敏元件对三甲胺在一定的浓度范围内的灵敏度与浓度呈现良好的双对数线性关系。棒状材料中形成的大量介孔对气敏性能的提高有着重要的作用。
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Indium oxide nanorods were synthesized by using non-ionic surfactant polyethoxylated alkylphenols OP-10 as a structure-directing agent.The decomposition,crystal form and micro-morphology of the nanorods were characterized by thermogravimetry-differential scanning calorimetry,X-ray diffraction and transmission electron microscopy.Gas sensitivity tests of the sensors prepared by nanorods were carried out.Scanning electron microscopy and surface and pore structure analysis were also used to analyze the surface morphology and mesostructure of the sensors.The results show that the products synthesized are In2O3 nanorods and have a cubic crystal structure with a diameter and length around 20 nm and 120 nm respectively.The sensor prepared by In2O3 nanorods has higher sensitivity and selectivity to trimethylamine(TMA)than that of indium oxide nanoparticles.The measurement results also show that gas sensors based on In2O3 nanorods provide a good log-log linear relation to TMA in a certain concentration between sensitivity and concentration.Mesopores formed in the nanorods played an important role in the gas sensing properties of nanorods materials.
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基金项目:
上海市科委纳米专项基金(0352nm068)资助项目
作者简介:
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参考文献:
[1]CHU Xiangfeng,WANG Caihong,JIANG Dongli,et al.Ethonal sensor based on indium oxide nanowires prepared by carbothermal reduction reaction[J].Chem Phys Lett,2004,399(4-6):461-464. [2]YANG H,SHI Q,TIAN B,et al.One-step nanocasting synthesis of highly ordered single crystalline indium oxide nanowire arrays from mesostructured frameworks[J].J Am Chem Soc,2003,125(16):4724-4725. [3]程知萱,潘庆谊,王廷富,等.溶胶-凝胶法制备的纳米In2O3气敏性能研究[J].郑州轻工业学院学报(自然科学版),2002,17(4):3-6.CHENG Zhixuan,PAN Qingyi,WANG Tingfu,et al.J Zhengzhou Light-Ind Inst(Nat Sci ed,in Chinese),2002,17(4):3-6. [4]程知萱,潘庆谊,董晓雯,等.In2O3气敏元件的研制及影响因素的研究[J].稀有金属,2005,29(2):173-176.CHENG Zhixuan,PAN Qingyi,DONG Xiaowen,et al.Rare Met(in Chinese),2005,29(2):173-176. [5]徐伯洪.作业场所空气和生物材料检测推荐方法[M].北京:人民卫生出版社,1996.348页.XU Baihong.Recommended Method for Measurement of Air and Biomaterial in Operating Area(in Chinese).Beijing:Peoples′Health Press,1996.p348. [6]彭军.传感器与检测技术[M].西安:西安电子科技大学出版社,2003.268页.PENG Jun.Sensor and Measurement Technology(in Chinese).Xi′an:University of Electron Science and Technology Xi’An Press,2003.p268
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