Carbon monoxide(CO)is a common flammable gas in life and production,which is very harmful to the human body.Therefore,it is of great significance to realize the high sensitivity and high stability detection of CO.A new type of composite sensitive material NiO@MGC is prepared by combining the sacrificial template method with the equal volume impregnation.The morphology and crystal structure of the samples with different loadings are characterized by XRD,BET,SEM and TEM.It is proved that the prepared composite material inherites the microporous structure of the molecular sieve template,and NiO is uniformly confined in the microporous channels.Sensor probe is made for gas sensitivity test.The results show that the sensor can realize the rapid detection of CO in the range of10×10-6～50 ×10-6,and has good stability.At the same time,it is verified that the sensor can realize selective detection of CO under the interference of NO2,NH3 and ethanol.
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