水热法制备硫掺杂氧化锌及其气敏性能

Preparation of Sulfur Doped Zinc Oxide by Hydrothermal Method and Its Gas Sensing Performance

针对纯氧化锌(ZnO)禁带宽度高、气体灵敏度较低的问题,采用水热法以硫代乙酰胺为硫(S)源对氧化锌进行掺杂,制得氧化锌纳米片状结构。采用X射线衍射(XRD)、扫描电子显微镜(SEM)对硫掺杂氧化锌纳米材料进行表征,并进一步探究该材料的气敏性能。结果表明:相对于纯的氧化锌样品,不同的硫掺杂质量分数对氧化锌气敏性能的影响有所不同,其中硫掺杂质量分数1.57%,氧化锌结构的气敏性能最佳,对乙醇气体的灵敏度达到9.25,具有最短响应时间(14 s)和恢复时间(4 s)。

According to the issues of high bandgap width and low gas sensitivity of pure zinc oxide(ZnO),doping of zinc oxide with sulfur(S)using thioacetamide as the sulfur source via a hydrothermal method was employed to prepare zinc oxide nano-sheet structures.sulfur doped zinc oxide nanomaterials were characterized by X-ray diffraction(XRD)and scanning electron microscopy(SEM),and the gas sensing properties were further investigated.The results show that compared with pure zinc oxide samples,different sulfur doping mass fractions have different effects on the gas sensing performance of zinc oxide.Among them,with a sulfur doping mass fraction of 1.57%,the gas sensing performance of zinc oxide structure is the best,with a sensitivity to ethanol gas of 9.25 and the shortest response time(14 s)and recovery time(4 s).