Investigation of CdO hexagonal nanoflakes synthesized by a hydrothermal method for liquefied petroleum gas detection

Cadmium oxide (CdO) hexagonal nanoflakes, demonstrated clearly in an SEM image, were synthesized via a one-step hydrothermal method. The formation of CdO was confirmed by XRD spectra and EDS spectra obtained from CdO nanoflakes. To demonstrate the potential applications, a gas sensor was fabricated and a gas sensing test showed that the sensor exhibited significantly high response to liquefied petroleum gas (LPG) with a short response/recovery time. The enhancement of sensing performance was attributed to the unique structure and greater number of surface active sites on the surface of the as-prepared gas-sensing material, which provided increased contact surface area between CdO and gas analytes.