Preparation of Porous Graphite Phase Carbon Nitride and Its Adsorption Property for U(Ⅵ)

被引：0
|
作者：
Ge Y. [1 ]
Wu J. [1 ]
Wang G. [1 ,2 ]
Zhou S. [1 ,2 ]
Liu J. [1 ,2 ]
机构：
[1] School of Civil Engineering, University of South China, Hengyang
[2] Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China, Hengyang
来源：
Yuanzineng Kexue Jishu/Atomic Energy Science and Technology | 2021年 / 55卷 / 04期
关键词：
Adsorption mechanism; Graphite phase carbon nitride; Porous graphite phase carbon nitride; U(Ⅵ);
D O I：
10.7538/yzk.2020.youxian.0310
中图分类号：
学科分类号：
摘要：
Porous graphite phase carbon nitride (PCN) was prepared by modifing graphite phase carbon nitride (g-C3N4) via thermal polymerization with melamine as raw material, and calcium carbonate as auxiliary template. The adsorption characteristics and effects of U(Ⅵ) by modified g-C3N4 before and after modification were studied. Characterization methods such as SEM, BET, FT-IR and XPS were used to analyze the adsorption mechanism of the PCN for U(Ⅵ). The results show that the specific surface area (58.5 m2/g) of PCN increases significantly, which is about 4 times of that of g-C3N4. The maximum adsorption capacity of PCN for U(Ⅵ) is 92 mg/g at the proper conditions of pH=5, the adsorption time of 2 h, the initial U(Ⅵ) concentration of 10 mg/L, the dosage of adsorbent of 0.2 g/L and the temperature of 303 K. The adsorption is well fitted to the second order kinetic equation and the Langmuir isothermal adsorption model, FT-IR and XPS confirm that the nitrogenous group on PCN is involved in the adsorption of U(Ⅵ). © 2021, Editorial Board of Atomic Energy Science and Technology. All right reserved.
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页码：603 / 611
页数：8
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