▎ 摘　　要

NOVELTY - Preparing erbium-doped zinc oxide nano-sheet based on uranium photo-catalytic reduction comprises (i) dispersing the zinc nitrate hexahydrate and hexamethylene tetramine in water, stirring and adding the monolayer graphene oxide solution and erbium chloride hexahydrate to obtain a mixed solution; (ii) adding the mixed solution into the reaction kettle, reacting at 140-160℃, washing the obtained sample with ethanol, centrifuging and drying; and (iii) annealing the dried sample at 700-900℃. USE - The method is useful for preparing erbium-doped zinc oxide nano-sheet based on uranium photo-catalytic reduction is useful for irradiating the photocatalyst with 50-500 kGy 60Co γ-rays for photocatalytic testing and in electrode materials and radioactive wastewater treatment (all claimed) and for photocatalytic treatment of uranium-containing wastewater. ADVANTAGE - The method prepares erbium-doped zinc oxide nano-sheet based on uranium photo-catalytic reduction can remove uranium in a short time and has good repeatability and anti-interference. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: Application of erbium-doped zinc oxide nano-sheet based on uranium photo-catalytic reduction in electrode materials, comprising mixing 3 mg erbium-doped zinc oxide nanosheets, 9 mg carbon black, 30 µl (0.5 wt.%) (Sulfonated tetrafluoroethylene based fluoropolymer-copolymer) solution, and 4 ml ethanol, treating ultrasonically for 1 hour to obtain the carbon-based catalyst ink, brushing the carbon-based catalyst ink evenly on a 1×2 cm carbon paper, drying to obtain a working electrode, using platinum sheet as the counter electrode and silver/silver chloride as the reference electrode and carrying out the electrochemical performance test on the electrochemical workstation; andNafion Application of erbium-doped zinc oxide nano-sheet based on uranium photo-catalytic reduction in radioactive wastewater treatment, comprising taking erbium-doped zinc oxide nanosheets, adding them into uranium-containing radioactive wastewater, stirring uranium-containing radioactive wastewater for 30 minutes in dark conditions and carrying out photocatalytic reaction under xenon lamp simulated sunlight conditions to realize photocatalytic reduction of hexavalent uranium in uranium-containing radioactive wastewater.