作　　者： ; ; ;

机构地区： 安徽工业大学化学与化工学院

出　　处： 《安徽工业大学学报（自然科学版）》 2010年第1期43-46,共4页

摘　　要： 以PEG-400为分散剂制得WO3纳米粉体,用粉末X-射线衍射仪(XRD)和透射电镜(TEM)对产物的物相和形貌进行了表征。结果显示:产物为球形颗粒,600℃下热处理2h颗粒平均粒径为80nm。将粉体制成旁热式气敏元件,气敏性能测试结果表明:该WO3纳米粉体对三甲胺具有较高的灵敏度和选择性。600℃下热处理2h材料气敏性最好,在240℃(最佳工作温度)下对体积分数为1×10-8的三甲胺灵敏度可达到3.2。 WO3 nano-particles were prepared by way of a polyethylene glycol （PEG）-assisted route. The structure and crystal phase of the powder were determined by using of powder X-ray diffraction （XRD）. The shape and size were analyzed with transmission electron microscopy （TEM）. The results show that the particles are global and the mean size which were heated at 600℃ for 2 h is 80 nm. Furthermore, the gas sensing properties of the gas sensor based on WO3 nanoparticles were tested at static state. It can be seen that WO3 nanoparticles show remarkable sensitivity and good selectivity to trimethylamine. Its sensitivity to 1×10^-8 trimethylamine is up to 3.2 on the optimal working temperature of 240℃.

关 键 词： 纳米颗粒 气敏传感器

领　　域： [冶金工程] [冶金工程]