▎ 摘　　要

NOVELTY - Reducing graphite alkenyl oxide light-heat conversion film comprises e.g. (i) adding graphene oxide and crosslinking agent into deionized water, magnetic stirring, transferring into ultrasonic cleaning machine, ultrasonically dispersing obtaining uniform dispersion, vacuum extracting and filtering dispersion onto mixed cellulose membrane, and drying resulting product to obtain graphite alkenyl oxide light-heat conversion film, and (ii) heating and reacting obtained film in step (i), soaking in aqueous solution of reducing agent, and removing film to obtain final product. USE - The conversion film is useful in photo-thermal conversion (claimed). ADVANTAGE - The method has simple preparation technique and low cost, reduces graphite alkenyl oxide double-layer photo-thermal conversion film under illumination of 1 kW/m2, and converts solar energy into steam energy; and the film has stable performance, photo-thermal conversion efficiency, excellent mechanical stability and reusability. DETAILED DESCRIPTION - Reducing graphite alkenyl oxide light-heat conversion film comprises (i) adding graphene oxide and crosslinking agent into deionized water, magnetic stirring, transferring into ultrasonic cleaning machine at room temperature, ultrasonically dispersing obtaining uniform dispersion, vacuum extracting and filtering dispersion onto mixed cellulose membrane having pore size of 0.22 mu m, and drying resulting product at 35 degrees C for 4-12 hours to obtain graphite alkenyl oxide light-heat conversion film, and (ii) heating obtained film in step (i), soaking in aqueous solution of reducing agent, reacting under microwave condition, removing film, washing, and drying to obtain reducing graphite alkenyl oxide light-heat conversion film. INDEPENDENT CLAIMS are also included for: (1) reducing graphite alkenyl oxide light-heat conversion film is prepared by above mentioned method; and (2) use of reducing graphite alkenyl oxide light-heat conversion film in photo-thermal conversion.