Facile synthesis of highly ethanol-sensitive SnO2 nanosheets using homogeneous precipitation method

Well-dispersed SnO2 nanosheets were obtained by the reaction of SnCl2·5H2O and CO(NH2)2 on Al2O3 tube using homogeneous precipitation method. The morphology, size and phase of the nanosheets were analyzed by scanning electron microscope (SEM) and X-ray diffraction (XRD). A novel micro gas sensor based on as-prepared SnO2 nanosheets was successfully fabricated. The gas-sensing results show that the sensor response of SnO2 nanosheets sensor reaches 48.377 to 100 ppm ethanol with a response time less than 8 s.