基于 g-C₃N₄ 修饰的 MgFe₂O₄ 多孔微球复合材料的高灵敏度丙酮气敏传感器。

Highly Sensitive Acetone Gas Sensor Based on g-C₃N₄ Decorated MgFe₂O₄ Porous Microspheres Composites.

机构信息

The Collaboration Innovation Center of Coal Safety Production of Henan Province, Henan Polytechnic University, Jiaozuo 454000, China.

School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China.

出版信息

Sensors (Basel). 2018 Jul 10;18(7):2211. doi: 10.3390/s18072211.

The g-C₃N₄ decorated magnesium ferrite (MgFe₂O₄) porous microspheres composites were successfully obtained via a one-step solvothermal method. The structure and morphology of the as-prepared MgFe₂O₄/g-C₃N₄ composites were characterized by the techniques of X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), thermal gravity and differential scanning calorimeter (TG⁻DSC) and N₂-sorption. The gas sensing properties of the samples were measured and compared with a pure MgFe₂O₄-based sensor. The maximum response of the sensor based on MgFe₂O₄/g-C₃N₄ composites with 10 wt % g-C₃N₄ content to acetone is improved by about 145 times, while the optimum temperature was lowered by 60 °C. Moreover, the sensing mechanism and the reason for improving gas sensing performance were also discussed.

通过一步溶剂热法成功获得了 g-C₃N₄ 修饰的镁铁氧体（MgFe₂O₄）多孔微球复合材料。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）、热重和差示扫描量热仪（TG⁻DSC）和 N₂ 吸附等技术对所制备的 MgFe₂O₄/g-C₃N₄ 复合材料的结构和形态进行了表征。并对样品的气敏性能进行了测量，并与纯 MgFe₂O₄ 基传感器进行了比较。基于含有 10wt%g-C₃N₄ 的 MgFe₂O₄/g-C₃N₄ 复合材料的传感器对丙酮的最大响应提高了约 145 倍，而最佳温度降低了 60°C。此外，还讨论了传感机制和提高气体传感性能的原因。