▎ 摘　　要

NOVELTY - Treating solar photo-thermal conversion water involves cutting the metal foam, and pretreating the metal foam under an ultrasonic condition, mixing the organic solution with metal foam for hydrothermal reaction, ultrasonically cleaning the obtained material, and drying in vacuum to obtain a metal foam porous absorber. The graphene oxide (GO) dispersion liquid, MXene dispersion liquid, carbon nitride (C3N4) dispersion liquid and polyvinyl alcohol (PVA) solution are added respectively in ratio of (1-10): (1-10): (1-10): (1-10) in 200-1000 ml deionized water, ultrasonically treating to obtain casting liquid. The casting liquid is deposited on microporous membrane by auxiliary mode of pressure filtration or vacuum filtration, and membrane is dried and then put into mixed solution of deionized water, concentrated hydrochloric acid and glutaraldehyde aqueous solution, and reacted. USE - Method for treating solar photo-thermal conversion water for resisting salt deposition. ADVANTAGE - The method uses GO and 2D metal carbonitrides to build a high-performance GO-MXene photothermal conversion thin film material with a 3D cross-linked network and tunable physicochemical structure, and also uses their synergistic effect to enhance the photothermal conversion performance, makes wastewater organic matter to degrade, and further realizes removal of VOCs from water vapor, which used for solar interfacial evaporation of seawater and high-salt organic wastewater. DETAILED DESCRIPTION - Treating solar photo-thermal conversion water involves cutting the metal foam, and pretreating the metal foam under an ultrasonic condition, mixing the organic solution with metal foam for hydrothermal reaction, ultrasonically cleaning the obtained material, and drying in vacuum to obtain a metal foam porous absorber. The graphene oxide (GO) dispersion liquid, MXene dispersion liquid, carbon nitride (C3N4) dispersion liquid and polyvinyl alcohol (PVA) solution are added respectively in ratio of (1-10): (1-10): (1-10): (1-10) in 200-1000 ml deionized water, ultrasonically treating to obtain casting liquid. The casting liquid is deposited on the microporous membrane by the auxiliary mode of pressure filtration or vacuum filtration, and the membrane is dried, and then put into the mixed solution of deionized water, concentrated hydrochloric acid and glutaraldehyde aqueous solution, and reacted. The membrane is hydrophobically modified by plasma using carbon tetrafluoride (CF4) to prepare a GO-MXene membrane absorber. The casting membrane liquid is deposited on a microporous filter membrane in an auxiliary mode of pressure filtration or vacuum filtration, drying the membrane, and then put the membrane liquid into a mixed solution of deionized water, concentrated hydrochloric acid and a glutaraldehyde aqueous solution and reacted. The membrane is hydrophobically modified by plasma using CF4 to prepare a GO-MXene membrane absorber. The GO-MXene film absorber is attached to a hydrophobic layer of a solar photo-thermal conversion water treatment device, and further attached a metal foam porous absorber to the bottom of a transparent heat insulation plate of the solar photo-thermal conversion water treatment device. The solar photothermal conversion water treatment device floats on the water surface, water is conveyed to the GO-MXene film absorber by the water conveying layer under the illumination intensity, saturated steam is produced and is secondarily heated by the metal slits in the metal foam porous absorber to produce superheated steam, and the superheated steam is output to the outside of the device. An INDEPENDENT CLAIM is included for a solar photo-thermal conversion water treatment device resistant to salt deposition, which comprises a container coated with a heat insulating material, the container having an upper opening and a lower opening. The floating heat insulation layer (8) is arranged in the container (10), and the whole device floats on the water surface by the buoyancy provided by the floating heat insulation layer (9). The water conveying layer (7) is coated on the floating heat insulation layer and is used for conveying water at the bottom of the floating heat insulation layer to the top. The GO-MXene film absorber is arranged in the container and above the water conveying layer, and is tightly attached to the water conveying layer by surface tension, and the water conveying layer conveys water to the GO-MXene film absorber. The transparent heat insulation plate is arranged at the top of the container and above the water conveying layer. The porous absorber (5) is arranged in the container, is positioned at the bottom of the transparent heat insulation plate and is not in direct contact with the GO-MXene film absorber (6). The steam outlet pipeline is inserted in the transparent heat insulation plate and communicated with the metal slit (2) in the porous absorber, and steam generated by the GO-MXene film absorber is discharged from the metal pipeline inserted in the transparent heat insulation plate after being secondarily heated by the metal slit. DESCRIPTION OF DRAWING(S) - The drawing shows a partial cross-sectional view of a solar water-treated superheated steam generator. 1Steam outlet pipeline 2Metal slit 3Transparent insulating plate 4Insulating gasket 5Porous absorber 6GO-MXene film absorber 7Water conveying layer 8Floating heat insulating layer 9Heat insulation layer 10Container