SELF-HEATING GAS SENSOR, GAS-SENSITIVE MATERIAL, PREPARATION METHOD FOR SAME, AND APPLICATIONS THEREOF

摘要

A gas-sensitive material, a preparation method for same, applications thereof, and a gas sensor using the gas-sensitive material. The gas-sensitive material is a carbon material-metal oxide composite nanomaterial formed by compounding a carbon material and metal oxides, the content of the carbon material in the carbon material-metal oxide composite nanomaterial is 0.5-20 weight%, the content of the metal oxides is 80-99.5 weight%, the metal oxides contain tungsten oxide and one or more selected from tin oxide, iron oxide, titanium oxide, copper oxide, molybdenum oxidy, and zinc oxide, the metal oxides are formed on the carbon material in the form of nanowires, and the nanowires are tungsten oxide-doped nanowires. The gas-sensitive material has reduced resistance, is capable of responding to various gases at a reduced working temperature, also obviates the need for external heating, implements self-heating simply by joule heating of a measuring circuit, and has reduced power consumption and increased sensitivity.