Synthesis of carbon nitride in potassium hydroxide molten salt for efficient uranium extraction from radioactive wastewater
作者机构：Institute of Nuclear and New Energy TechnologyTsinghua UniversityBeijing 100084China Nuclear Research Institute for Future Technology and PolicySeoul National UniversitySeoul 08826Republic of Korea Department of Earth SciencesUniversity of CambridgeCambridge CB23EQUK The MOE Key Laboratory of Resources and Environmental System OptimizationCollege of Environmental Science and EngineeringNorth China Electric Power UniversityBeijing 102206China
出 版 物：《Frontiers of Environmental Science & Engineering》 (环境科学与工程前沿（英文）)
年 卷 期：2024年第18卷第8期
页 面：89-99页
核心收录：
学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学]
基 金：financially supported by the National Natural Science Foundation of China(Nos.22376059 and 21976104) the Young Elite Scientists Sponsorship Program of China Association for Science and Technology(No.2021QNRC001) the Brain Pool program funded by the Ministry of Science and ICT through the National Research Foundation of Korea(No.NRF-2022H1D3A2A02051548)
主 题：Uranium Carbon nitride Molten salt Photocatalysis Radioactive wastewater
摘 要：Photocatalysis-assisted removal of uranium has been proven as an effective method for the elimination of radioactive pollution from *** this work,carbon nitride materials were synthesized in potassium hydroxide(KOH)molten salt and applied to photocatalytic uranyl *** materials were confirmed to possess the triazine-s-heptazine structure by NMR,XPS and UV-Vis characterization,and exhibited a wider visible light absorption than graphitic carbon nitride(g-C_(3)N_(4)).The photocatalytic activity of the carbon nitride materials was tailored by varying the precursor mass *** carbon nitride obtained at 80%melamine as precursor(K-CN-80)exhibited the highest photocatalytic extraction ability and its photocatalytic reaction rate is 6.6 times faster than that of g-C_(3)N_(4).The influence of sacrificial agents was studied and the results showed that triethanolamine inhibited U(Ⅵ)photoreduction,but methanol can accelerate U(Ⅵ)photoreduction by consuming photogenerated *** unary KOH molten salt synthesis method has exceptional potential applications in the preparation of carbon nitrides,and the obtained products showed potential in extracting U(Ⅵ)from aqueous solutions for use in nuclear fuel industry and for U(Ⅵ)environmental pollution cleanup.
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