Low-temperature CO gas sensors based on Au/SnO_2 thick film

摘要

A study on the low-temperature CO gas sensors based on Au/SnO_2 thick film was reported. Au/SnO_2 powders were prepared by a deposition-precipitation method. Thick films were fabricated from Au/SnO_2 powders. X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS) analyses were carried out for investigation of morphology and crystalline structure. Au/SnO_2 thick film sensors exhibited high sensitivity to CO gas at relatively low operating temperature (83-210 ℃). We also reported the effect of the calcination temperature of Au/SnO_2 on the CO gas sensing behavior. The optimal calcination temperature of Au/SnO_2 was 300 ℃.