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Direct surface modification of nanodiamonds with ionic copolymers for fast adsorptive removal of copper ions with high efficiency
Colloid and Interface Science Communications ( IF 4.5 ) Pub Date : 2020-07-04 , DOI: 10.1016/j.colcom.2020.100278
Ziyang He , Qiang Huang , Liucheng Mao , Hongye Huang , Meiying Liu , Junyu Chen , Fengjie Deng , Naigen Zhou , Xiaoyong Zhang , Yen Wei

In this study, we developed a rapid microwave-assisted Diels-Alder reaction to prepare hydroxylated ND; then the ionic copolymers functionalized ND composites were obtained through direct surface-initiated Ce(IV)/HNO3 redox polymerization by utilization of the hydroxyl groups and the resultant ND based composites were utilized for adsorptive removal of copper ions. The results demonstrated the Pseudo-second-order model can well describe the adsorption kinetic of ND-poly(AA-co-MPC) and it has been confirmed that the adsorption behavior is initiative and endothermic and related thermodynamic parameters (△G, △H, △S). The Langmuir isotherm model is better to describe the adsorption isotherms and the temperature experiment results show the best pH environment is pH 7–9. The results above demonstrated the ND-poly(AA-co-MPC) prepared by Ce(IV)/HNO3 redox polymerization shows great potential in environmental treatment and remediation and the easy, mild, hydrous polymerization strategy can be exampled in the field of material surface modification.



中文翻译:

用离子共聚物对纳米金刚石进行直接表面改性,可快速高效吸附去除铜离子

在这项研究中,我们开发了一种快速的微波辅助Diels-Alder反应来制备羟基化ND。然后通过羟基的直接表面引发的Ce(IV)/ HNO 3氧化还原聚合反应获得离子共聚物官能化的ND复合材料,并将所得的ND基复合材料用于吸附去除铜离子。结果表明,伪二级模型可以很好地描述ND-poly(AA -co-MPC),并且已经证实吸附行为是主动的,吸热的和相关的热力学参数(△G,△H,△S)。Langmuir等温线模型可以更好地描述吸附等温线,温度实验结果表明最佳的pH环境为pH 7–9。以上结果表明,Ce(IV)/ HNO 3氧化还原聚合制备的ND-聚(AA -co- MPC)在环境处理和修复方面显示出巨大的潜力,并且可以在该领域举例说明简单,温和的含水聚合策略材料表面改性。

更新日期:2020-07-04
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