期刊论文

Study on the Properties and Mechanism of U(Ⅵ) Adsorption of PPy/g-C_3N_4

中文

材料导报

1005-023X

2020

34

23

23020-23026

10.11896/cldb.19110056

国家自然科学基金(11475080) 南华大学博士科研启动基金(2016XQD06) 湖南省研究生科研创新项目(CX20190742)。

本校为第一机构

以石墨相氮化碳(g-C_3N_4)、聚吡咯(PPy)为原料,采用原位聚合法制备聚吡咯/石墨相氮化碳(PPy/g-C_3N_4)复合材料,探究PPy/g-C_3N_4对水中U(Ⅵ)的吸附性能。研究pH值、温度、PPy/g-C_3N_4投加量、反应时间、U(Ⅵ)初始浓度等影响因素对PPy/g-C_3N_4吸附U(Ⅵ)的影响。结果表明:在pH= 5、U(Ⅵ)初始浓度为5 mg/L、PPy/g-C_3N_4的投加量为200 mg/L、吸附时间为20 min的条件下,PPy/g-C_3N_4对U(Ⅵ)的最大吸附率为93.22%。PPy/g-C_3N_4对U(Ⅵ)的吸附等温线符合Freundlich模型,吸附动力学符合准二级动力学。SEM-EDS、XRD分析表明,本工作成功制得了PPy/g-C_3N_4复合材料。XPS和FTIR结果说明,PPy/g-C_3N_4中...

Polypyrrole/graphite phase carbon nitride (PPy/g-C_3N_4) composites were prepared by in-situ polymerization using graphite phase carbon nitride(g-C_3N_4) and polypyrrole (PPy) as raw materials to explore the adsorption performance of PPy/g-C_3N_4 to U(Ⅵ) in wastewater.The effects of pH,temperature,PPy/g-C_3N_4 dosage,reaction time and initial concentration of U(Ⅵ) on the adsorption of U(Ⅵ) on PPy/g-C_3N_4 were studied.The results showed that at pH=5,the initial concentration of U(Ⅵ) was 5 mg/L,the dosage of PPy/g-C_3N_4 was 200 mg/L,and the...