▎ 摘　　要

NOVELTY - The preparation method of dibasic tungsten diselenide-nitrogen-doped graphene photocatalytic adsorbent involves (i) dissolving sodium tungstate dihydrate and selenium powder in deionized water, adding hydrogen source and reducing agent, stirring, placing in a high pressure reactor, reacting, cooling, washing, and drying to obtain a grey powdery substance, treating with sodium hydroxide solution, washing, and drying to obtain tungsten disulfide, (ii) dissolving oxidized graphite in deionized water, ultrasonically dispersing, and centrifuging to obtain oxidized graphite dilute liquid. USE - Preparation of dibasic tungsten diselenide-nitrogen-doped graphene photocatalytic adsorbent used in adsorption of degradable organic compounds (all claimed). ADVANTAGE - The method enables the preparation of dibasic tungsten diselenide-nitrogen-doped graphene photocatalytic adsorbent with high light absorption coefficient, forbidden bandwidth of 1.35 eV, high electron mobility, and photogenerated carrier mobility, large specific surface area, and excellent photocatalytic adsorption performance, and improves the degradation performance of organic pollutants under visible light. DETAILED DESCRIPTION - The preparation method of dibasic tungsten diselenide-nitrogen-doped graphene photocatalytic adsorbent involves (i) dissolving sodium tungstate dihydrate and selenium powder in deionized water in a certain ratio, adding hydrogen source and reducing agent, uniformly and magnetically stirring, placing in a high pressure reactor, reacting for a certain time, cooling to room temperature, washing, and drying to obtain a grey powdery substance, treating with sodium hydroxide solution, washing, and drying to obtain tungsten disulfide (Wse2), (ii) weighing certain amount of oxidized graphite, dissolving in certain amount of deionized water, ultrasonically dispersing for 2-4 hours, and centrifuging for 20-40 minutes to obtain brown solution which is oxidized graphite dilute liquid, (iii) dissolving urea and tungsten selenide in oxidized graphite dilute liquid, stirring the mixture, placing in a high pressure reactor, reacting for a certain time, cooling to obtain black solid, washing with distilled water for several times, placing in a vacuum oven, and freeze-drying.