The perovskite CdSnO ₃ micro-particles modified by multi-walled carbon nanotubes enhance the ethanol gas sensing property

Cubic CdSnO ₃ and it modified by multi-walled carbon nanotubes (CdSnO ₃/MWCNTs) have been synthesized by following a mild hydrothermal method. CdSnO ₃/MWCNTs were characterized by using field emission scanning electron microscope (FE-SEM) and X-ray diffractometer (XRD) techniques. The results show that adding MWCNT5 in the processing of synthesis had advantage to the growth of the CdSnO ₃ crystalline. Meanwhile, a comparative study of gas sensing property of CdSnO ₃ and CdSnO ₃/MWCNTs to ethanol vapor has been reported. CdSnO ₃ and CdSnO ₃/MWCNTs samples were deposited as thick films to act as gas sensors and their comparative response to ethanol vapor was investigated at different temperatures and concentrations. The results reveal that gas response of CdSnO ₃/MWCNTs is exceptionally higher than that of CdSnO ₃. The improvement of the gas sensing property of CdSnO ₃/MWCNTs might due to the bigger surface area and the better crystalline of CdSnO ₃/MWCNTs.