Construction of hyperbranched imprinted nanomaterials for selective adsorption of cadmium (II).

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-02-20 eCollection Date: 2024-01-01 DOI:10.55730/1300-0527.3664

Sheng Nan Hu, Xinyu Zhang, Ming Guo, Shengchun Wu, Wenjun Lu

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Abstract

A hyperbranched ion-imprinted polymer (IIP) material containing multiple selective adsorption sites was synthesized using halloysite nanotubes, methyl acrylate, and ethylenediamine in the presence of a template ion [i.e. Cd (II) heavy metal]. The successful preparation of the Cd-IIP composition was confirmed by FT-IR, XRD, TEM, TGA, and elemental analysis. The polymers exhibited good adsorption of Cd (II) with a maximum adsorption capacity of 64.37 mg·g^-1. The imprinting factor (α) for Cd (II) was 2.62 and the selection factor (β) was 1.78, indicating a specific adsorption of Cd (II) ion. The selection coefficients of Cd-IIP for Cd (II)/Pb (II), Cd (II)/Cu (II), Cd (II)/Ni (II), Cd (II)/Cr (III), and Cd (II)/Na (I) also indicated an excellent selectivity of the hyperbranched polymers for Cd (II) in the presence of competitive ions. The removal efficiency remained more than 75% after five cycles of desorption/adsorption. We envision that the HNTs based Cd-IIP has promising applications in the removal of Cd (II) from wastewater.

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构建超支化印迹纳米材料，用于选择性吸附镉 (II)。

在模板离子[即重金属镉 (II)]存在的情况下，利用哈洛石纳米管、丙烯酸甲酯和乙二胺合成了一种含有多个选择性吸附位点的超支化离子压印聚合物 (IIP) 材料。FT-IR、XRD、TEM、TGA 和元素分析证实了 Cd-IIP 成分的成功制备。聚合物对镉（II）具有良好的吸附性，最大吸附容量为 64.37 mg-g-1。镉（II）的印记因子（α）为 2.62，选择因子（β）为 1.78，表明对镉（II）离子具有特异性吸附。镉(II)/铅(II)、镉(II)/铜(II)、镉(II)/镍(II)、镉(II)/铬(III)和镉(II)/镍(I)的镉(IIP)选择系数也表明，在存在竞争离子的情况下，超支化聚合物对镉(II)具有极佳的选择性。经过五次解吸/吸附循环后，去除效率仍保持在 75% 以上。我们认为，基于 HNTs 的 Cd-IIP 在去除废水中的镉（II）方面具有广阔的应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.