Gas Sensing Properties of Molecular Sieve Modified 3DIO ZnO to Ethanol.

In order to detect the safe driving area in a non-invasive and accurate way in practical application, the architecture of three-dimensional inverse opal (3DIO) ZnO and molecular sieve modified 3DIO ZnO gas sensor are prepared by simple controllable sacrifice template method. Its morphology is characterized by scanning electron microscopy (SEM) and its structure is characterized by X-ray diffraction (XRD). The sensing properties of the gas sensor are studied systematically. The results show that the response of the sensor possessed remarkable sensitivity to ethanol gas, even in high relative humidity (RH) conditions (~94%RH). The response of the molecular sieve modified 3DIO gas sensor is ~5.103 to 200 ppm for ethanol, which can effectively detect ethanol as low as 10 ppm. In conclusion, the molecular sieve modified 3DIO ZnO owns satisfactory gas sensing properties in detecting ethanol under high humidity.