空心氧化铟小球的合成及其三甲胺气敏特性的测定

Synthesis and characterization of indium oxide hollow microspheres for trimethylamine gas sensing properties

本文在以蔗糖为碳源,通过水热方法合成均匀分散的碳小球的基础上,以碳小球为硬模板,采用硬模板法,以硝酸铟为金属源,通过在空气中灼烧的方法获得氧化铟材料。经过透射电子显微镜(TEM),并结合广角X射线衍射(Wide-angleXRD)等手段,证实所得材料为高结晶度的空心氧化铟材料。通过在旁热式气敏元件表面简单涂抹的办法,氧化铟空心小球被制备成气敏器件,并对其三甲胺(TMA)气敏性能进行了测定。研究结果表明,该种材料在较低的工作温度下对TMA具有较高的敏感性和选择性,这表明该种材料是一种非常有前途的TMA气敏材料,有望在食品检测等领域获得广泛应用。

A simple method has been developed for the synthesis of homogeneous hollow core-shell microspheres of indium oxide by using carbonaceous saccharide microspheres as template.The characterization of transmission electron microscope （TEM）,and Wide-angle X-ray diffraction proved that the prepared hollow indium oxide materials is partially crystalline.The gas sensor is prepared by simply painting the synthesized indium oxide microspheres on an indirectly heated gas sensitive element,and its trimethylamine （TMA） gas-sensing properties were determined.The results show that this kind of material has a high sensitivity and selectivity to TMA at a relativity low temperature,which indicates that it＇s a very promising TMA sensitive material,and is expected to be widely used in areas such as food testing.