一维Ga2O3/SnO2纳米纤维的制备及其气敏性能

Preparation and Gas-Sensing Properties of One-Dimensional Ga2O3/SnO2 Nanofibers

通过静电纺丝法制备了一维Ga2O3/SnO2纳米纤维,采用X射线衍射(XRD)、扫描电镜(SEM)、紫外可见漫反射光谱(UV-Vis DRS)等方法对材料进行了表征,测试了不同Ga2O3质量分数(0、40%、50%、60%、70%、100%)的Ga2O3/SnO2纳米纤维(650℃,5 h)对应元件对三甲胺、丙酮、乙醛、乙酸、氨气、乙醇、甲醛7种气体的气敏性能。结果表明:在室温(25℃)时,60%(w/w)Ga2O3-40%(w/w)SnO2纳米纤维对三甲胺气体具有较高的灵敏度和较短的响应/恢复时间。对1000μL·L^-1三甲胺的灵敏度达到51;检出限达到0.8μL·L^-1,其灵敏度为1.3。

Ga2O3/SnO2 one-dimensional nanofibers were prepared by electrospinning method.The materials were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),UV-Visible diffuse reflection spectrum(UV-Vis DRS),etc.Gas-sensing properties of Ga2O3/SnO2(650℃,5 h)nanofibers with different Ga2O3 mass fractions(0,40%,50%,60%,70wt%,100%)were prepared.The responses of gas sensors made from Ga2O3/SnO2(650℃,5 h)nanofibers to seven kinds of gases including trimethylamine,acetone,acetaldehyde,acetic acid,ammonia,ethanol and formaldehyde were investigated.The results showed that the 60%(w/w)Ga2O3-40%(w/w)SnO2 nanofibers had a higher response to trimethylamine,shorter response/recovery time;at room temperature(25℃),the response of this composite material to 1000μL·L^-1 trimethylamine reached 51,the minimum detection limit for trimethylamine could reach 0.8μL·L^-1 and the response was 1.3.