▎ 摘　　要

NOVELTY - Preparing biomass-based aerogel photo-thermal material comprises (i) adding oxidized graphene into alkaline solution, mixing uniformly, adding cellulose and humic acid, uniformly mixing to obtain mixed solution, then adding cross-linking agent and mixing uniformly, allowing to stand to form chemical cross-linked humic acid/cellulose/graphene oxide composite hydrogel; and (ii) subjecting the composite hydrogel to solvent exchange, pre-freezing and then freezing to dry aerogel. USE - The photothermal material is useful in seawater desalination (claimed). ADVANTAGE - The aerogel photo-thermal material: has a highly porous structure; provides a channel for the transport of water and steam; and has evaporation rate as high as 2.5 kg.m-2.h-1 when the light intensity is 1 kW.m-2. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for biomass-based aerogel photo-thermal material prepared by above mentioned method.