▎ 摘　　要

NOVELTY - A photothermal conversion material comprises aerogel matrix comprising graphene and hygroscopic polymer containing polyhydrophilic polymer. USE - Photothermal conversion material. ADVANTAGE - The photothermal conversion material has high humidity range, self-desorption and adsorption of large amount of water vapor. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of photothermal conversion material, which involves mixing graphite oxide and the hygroscopic polymer, lyophilizing to form an aerogel matrix precursor, and subjecting the aerogel precursor to a reduction treatment to form aerogel matrix.