Preparation method of Ag-SnO2-graphene aerogel gas-sensitive material doped with silver through impregnation method

The invention relates to a preparation method of an Ag-SnO2-graphene aerogel gas-sensitive material doped with silver through an impregnation method. Graphene is used as a network skeleton structure and compounded with a metal oxide SnO2, and elemental Ag is doped through the impregnation method so that the sensitivity and the recovery rate of the material can be improved. Ag is used as a catalystso that the reaction activity can be enhanced, the activation energy is reduced, and the gas-sensitive effect is improved. The density of the prepared Ag-SnO2-graphene aerogel is 0.15-0.26 g/cm < 3 >, the specific surface area of the prepared Ag-SnO2-graphene aerogel is 162-200 m < 2 >/g, and the responsivity of the prepared Ag-SnO2-graphene aerogel is 36-43%. The aerogel sample is prepared by adopting the impregnation method and a hydrothermal reduction method, the process can remarkably improve the distribution uniformity of Ag simple substance particles on the surface of the material, andthe performance loss cause