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Development of high sensitivity LPG and NO2 gas sensor based ZnGa2O4/graphene nanoplates hybrid structure - A novel approach
Diamond and Related Materials ( IF 4.1 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.diamond.2020.108167
V. Munusami , K. Arutselvan , S. Vadivel

Abstract The report is on high performance LPG gas sensor based ZnGa2O4/Graphene (ZGO/GR) structure by using facile hydrothermal approach. The heterostructure was characterized by X-ray diffraction (XRD), Field emission scanning electron microscope (FESEM), Transmission electron microscope (TEM), Raman and Brunauer-Emmett-Teller (BET) analysis. XRD results exposed that ZGO/GR is cubic phase with spinel structure. The fibers and platelets morphologies obtained were ZnGa2O4 and ZGO/GR sample, confirmed through FESEM and TEM analysis. Mesoporous with high porous nature and huge surface area (108 m2/g) of ZGO/GR hybrid samples was confirmed by N2 adsorption-desorption analysis. The resistive sensor was fabricated and the prepared sensors were evaluated towards LPG and NO2 gases with various concentrations at room temperature. The results deliver that the hybrid sensors have excellent sensing performance such as high sensitivity (52%), fast response (32 s) and recovery time (41 s) as well as high stability towards LPG gas. The obtained hybrid sensor is not only high sensitivity, it also high selectivity to LPG gas then other gas spices (NH3, ethanol, ammonia, CO and acetone). The improved mechanism is also proposed in detail.

中文翻译:

基于ZnGa2O4/石墨烯纳米片混合结构的高灵敏度LPG和NO2气体传感器的开发——一种新方法

摘要 该报告是通过使用简便的水热方法基于 ZnGa2O4/石墨烯 (ZGO/GR) 结构的高性能 LPG 气体传感器。通过X射线衍射(XRD)、场发射扫描电子显微镜(FESEM)、透射电子显微镜(TEM)、拉曼和Brunauer-Emmett-Teller(BET)分析表征异质结构。XRD 结果表明 ZGO/GR 是具有尖晶石结构的立方相。获得的纤维和薄片形态是 ZnGa2O4 和 ZGO/GR 样品,通过 FESEM 和 TEM 分析证实。N2 吸附-解吸分析证实了 ZGO/GR 杂化样品具有高多孔性和巨大表面积 (108 m2/g) 的介孔。制造了电阻传感器,并在室温下对不同浓度的 LPG 和 NO2 气体评估了制备的传感器。结果表明,混合传感器具有出色的传感性能,例如高灵敏度 (52%)、快速响应 (32 s) 和恢复时间 (41 s) 以及对 LPG 气体的高稳定性。所获得的混合传感器不仅灵敏度高,而且对液化石油气气体的选择性也比其他气体香料(NH3、乙醇、氨、CO 和丙酮)高。还详细提出了改进机制。
更新日期:2021-01-01
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