Highly Sensitive Acetone Gas Sensor Based on g-C(3)N(4) Decorated MgFe(2)O(4) Porous Microspheres Composites

The g-C(3)N(4) decorated magnesium ferrite (MgFe(2)O(4)) porous microspheres composites were successfully obtained via a one-step solvothermal method. The structure and morphology of the as-prepared MgFe(2)O(4)/g-C(3)N(4) 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 N(2)-sorption. The gas sensing properties of the samples were measured and compared with a pure MgFe(2)O(4)-based sensor. The maximum response of the sensor based on MgFe(2)O(4)/g-C(3)N(4) composites with 10 wt % g-C(3)N(4) 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.