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以二水合醋酸锌为原料,以十二烷基苯磺酸钠为表面修饰剂,利用微乳液法合成了结晶良好的ZnO纳米棒。利用X射线衍射仪、扫描电子显微镜和高分辨透射电子显微镜对所得产物的晶体结构和形貌进行了表征。结果表明:所得的ZnO纳米棒具有六方纤锌矿结构,且尺寸分布均匀,直径为20～30 nm,长度为1.0μm。利用所得ZnO纳米棒制备了气敏元件,并对其气敏特性进行了测试。结果表明:ZnO纳米棒气敏元件在430℃的工作温度下,对丙酮气体具有良好的灵敏度和选择性。当丙酮气体的浓度为1.0×10-5时,该气体传感器的检测灵敏度可达到11。
Using zinc acetate dihydrate as raw material and sodium dodecyl benzene sulfonate as surface modifier, ZnO nanorods with good crystallinity were synthesized by microemulsion method. The crystal structure and morphology of the obtained product were characterized by X-ray diffraction, scanning electron microscopy and high-resolution transmission electron microscopy. The results show that the obtained ZnO nanorods have a hexagonal wurtzite structure with a uniform size distribution and a diameter of 20-30 nm and a length of 1.0 μm. Gas sensing elements were prepared by using ZnO nanorods. The gas sensing properties were also tested. The results show that ZnO nanorod gas sensor has good sensitivity and selectivity to acetone gas at 430 ℃. When the acetone gas concentration of 1.0 × 10-5, the gas sensor detection sensitivity can reach 11.