ZnO/NiO异质结构纳米纤维的制备与气敏性能

Preparation and Gas Sensing Properties of ZnO/NiO Heterostructured Nanofibers

采用静电纺丝结合煅烧处理制备了ZnO/NiO异质结构纳米纤维,通过扫描电镜、高分辨透射电镜、红外光谱、X射线光电子能谱和X射线衍射等方法详细研究了ZnO/NiO异质结构纳米纤维的形貌、结构、化学组成和结晶性。结果表明,制备的ZnO/NiO纳米纤维具有异质结构,其平均直径约为200 nm,所生成的ZnO、NiO均匀地分布在纳米纤维的两侧。并以ZnO/NiO异质结构纳米纤维为气敏传感器,研究了其对乙醇气体的气敏传感性能,气敏测试结果表明,其对浓度为103 mg/L的乙醇气体响应恢复速度快,有利于对低浓度乙醇气体的探测。

ZnO/NiO heterostructured nanofibers (NFs) were fabricated by the electrospinning method combined with calcination. The structure, morphology, chemical composition and crystallinity of ZnO/NiO nanofibers were characterized by SEM, high-resolution transmission electron microscopy (HRTEM), FT-IR, X-ray photoelectron spectroscopy (XPS) and XRD techniques. The results show that the prepared ZnO/NiO nanofibers have heterostructures and the average diameter is about 200 nm. The generated ZnO and NiO are evenly distributed on both sides of the nanofibers. The gas sensing performance of the heterostructured ZnO/NiO nanofibers was investigated. The gas sensing test reveals that the sensing performances of the ZnO/NiO sensor to 103 mg/L ethanol gas is relatively prominent and the response and recovery time become shorter considerably which is propitious to the detection of low concentration ethanol gas.