不同形貌纳米SnO_2的可控合成及催化发光传感器

Controllable Fabrication of SnO_2 Nanomaterials with Three Kinds of Morphologies and Their Application as Cataluminescence Sensor

以碳纳米管(Carbon nanotubes,CNT)为模板,采用液相沉积法,通过改变煅烧温度可控合成了SnO2-CNT复合纳米材料、SnO2纳米棒和SnO2纳米粒子3种形貌的SnO2纳米材料,研究了3种形貌的SnO2纳米材料对乙酸乙酯催化发光的影响.考察了3种不同形貌SnO2纳米材料的纳米尺度和结构,讨论了影响纳米材料催化发光特性的因素,研究了3种不同形貌SnO2纳米材料对乙酸乙酯催化发光图谱和强度的变化,建立了3种新型、高效的不同形貌纳米催化发光传感器.

A simple method for controllable synthesis of SnO2 nanomaterials with three kinds of morphologies like nanoparticles,nanorods and SnO2-CNT nanocomposites by carbon nanotube-templated liquid phase deposition method has been proposed.The TEM images of SnO2-CNT nanocomposites reveal that the carbon nanotube is coated by a thin layer of SnO2 nanoparticles.Uniform and monodispersed crystalline SnO2 nanorods have been obtained by burning of the CNT template.Cataluminescence（catalytic chemiluminescence,CTL） characteristic of ethyl acetate catalyzed on nanosized SnO2 with three kinds of morphologies have been studied.Nanostructure and BET surface area of the SnO2 nanomaterial are very important for the CTL.Relationship between SnO2 nanomaterial with three kinds of morphologies and CTL of ethyl acetate has been established.Three new kinds of gas sensors have been invented based on the spectrum mentioned above.