▎ 摘　　要

NOVELTY - Preparing carbon nanotube hydrogel with photo-thermal water evaporation comprises providing carbon nanotube aerogel with hierarchical structure, and a nano-carbon polymer solution containing first polymer, a second polymer, and/or small molecules, or nano-carbon materials, fully infiltrating the surface of the carbon nanotube aerogel with nanocarbon polymer solution, drying to obtain the first polymer, the second polymer or small molecules and the carbon nanotubes modified by the carbon nanotube material, and fully immersing carbon nanotube hydrogel in water to obtain the carbon nanotube hydrogel with photo-thermal water evaporation. USE - The hydrogel is useful in seawater desalination, sewage treatment or heavy metal salt treatment fields (claimed). ADVANTAGE - The hydrogel: is efficient; and has high light absorption capacity, multi-level pore structure, high self-evaporation rate, and practical application prospects. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for carbon nanotube hydrogel with photo-thermal water evaporation comprising polymer gel network, nano carbon materials, where the carbon nanotube network is cross-linked by non-covalent bonds to form a three-dimensional interpenetrating double network structure, the double network structure has a hierarchical pore structure, the nano carbon material is supported in the double network structure, the loading amount of the nano-carbon material in the double network structure is 20-60 wt.%, the absorbance of the carbon nanotube hydrogel is 90-99%, the light transmittance is 0.1-5%, the interface water content is 40-60%, the light-to-heat conversion temperature is 30-45 degrees C, the photo-thermal temperature of the dry gel formed after the carbon nanotube hydrogel is dried is 60-80 degrees C, and the carbon nanotube hydrogel has an evaporation rate of 1.8-4.3 kg/m-2/hour and an evaporation efficiency of 90-97% under the intensity of one sunlight.