▎ 摘　　要

NOVELTY - Nanocomposite aerogel comprises a matrix in which iron oxide nanoparticles, copper oxide nanoparticles, and graphene powder are dispersed, the matrix comprising agar and nanocellulose. USE - The nanocomposite aerogel is useful in a vapor sensor and adsorbent materials, and chromatography media, for adsorption, catalysis, electromagnetic absorption, enzyme immobilization, delivery systems, energy storage, electronics, and environmental and analytical applications. ADVANTAGE - The nanocomposite aerogel: exhibits little to no electrical conductance in its dry form but becomes conductive in its wet or moist form making it suitable for use in vapor sensor fabrication; exhibits good adsorption capabilities, especially as dye adsorbents; and is lightest known materials and possess unique properties of high porosity, large surface area, insulation, and thermal stability while in some cases also possessing demerits of high brittleness and cost. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: ensor comprising the nanocomposite aerogel; adsorbent material comprising the nanocomposite aerogel; chromatography medium comprising the nanocomposite aerogel; and producing a nanocomposite aerogel comprising (a) dissolving a quantity of agar and a quantity of nanocellulose in water to create an agar/nanocellulose solution, (b) preparing a metal oxide/graphene suspension by suspending respective quantities of iron oxide nanoparticles, copper oxide nanoparticles, and graphene nanopowder in water, (c) mixing the agar/nanocellulose solution and the metal oxide/graphene suspension together to form a nanocomposite suspension, (d) solidifying the nanocomposite suspension to form a solid nanocomposite, and (e) removing water from the solid nanocomposite to form the nanocomposite aerogel.