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使用新型二氮烯/甲氧基配位聚合物从低浓度水溶液中有效去除铬(III)

Effective Removal of Chromium(III) from Low Concentration Aqueous Solution Using a Novel Diazene/Methoxy-Laced Coordination Polymer.

作者信息

Liu Lei-Lei, Xing Yun, Yu Hui-Ying, Zhang Cai-Wen, Ye Meng-Qi, Miao Ming-Zhen, Yu Cai-Xia

机构信息

Henan Key Laboratory of New Optoelectronic Functional Materials, College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, China.

出版信息

Polymers (Basel). 2017 Jul 9;9(7):273. doi: 10.3390/polym9070273.

DOI:10.3390/polym9070273
PMID:30970951
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6431845/
Abstract

In this study, a novel coordination polymer [CdL₂(H₂O)] (), [HL = 4-(2-(4-((pyridin-3-yl)methoxy)phenyl)diazenyl)benzoic acid] was fabricated via an in situ ligand transformation reaction under solvothermal conditions. The as-prepared polymer exhibited a selectivity and efficiency for Cr(III) removal with a high uptake capacity of 106.13 mg·g. Interestingly, even in the low concentration (0.02⁻0.20 ppm), it still performs a relatively high efficiency (≥ 92.5%) towards the removal of Cr(III) in aqueous solution. Remarkably, it also presents good selectivity and high efficiency (93.3%) for Cr(III) removal in the presences of interfering metal ions. The good removal performance for Cr(III) was demonstrated to be a structure-dependent chemical process between polymer and Cr(III) involving the diazene and methoxy groups in polymer , which happened not only on the surfaces of the adsorbent but also in the pores of polymer, giving rise to a strong affinity toward Cr(III) adsorption. The possible adsorption mechanism of Cr(III) was proposed and systematically verified by FT-IR, scanning electron microscope (SEM), atomic force microscope (AFM) and energy dispersive spectrometer (EDS) measurements.

摘要

在本研究中，通过溶剂热条件下的原位配体转化反应制备了一种新型配位聚合物[CdL₂(H₂O)]（[HL = 4-(2-(4-((吡啶-3-基)甲氧基)phenyl)重氮基)苯甲酸]）。所制备的聚合物对Cr(III)的去除表现出选择性和高效性，具有106.13 mg·g的高吸附容量。有趣的是，即使在低浓度（0.02⁻0.20 ppm）下，它对水溶液中Cr(III)的去除仍具有相对较高的效率（≥ 92.5%）。值得注意的是，在存在干扰金属离子的情况下，它对Cr(III)的去除也表现出良好的选择性和高效率（93.3%）。Cr(III)的良好去除性能被证明是聚合物与Cr(III)之间基于结构的化学过程，涉及聚合物中的重氮基和甲氧基，这不仅发生在吸附剂表面，也发生在聚合物的孔隙中，从而对Cr(III)吸附产生强烈的亲和力。通过傅里叶变换红外光谱（FT-IR）、扫描电子显微镜（SEM）、原子力显微镜（AFM）和能量色散谱仪（EDS）测量，提出并系统验证了Cr(III)可能的吸附机制。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e1d5/6431845/2a4240f6c7e7/polymers-09-00273-g010a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e1d5/6431845/5abe59fd31d3/polymers-09-00273-sch001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e1d5/6431845/478d5ef5a099/polymers-09-00273-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e1d5/6431845/593d5022ae11/polymers-09-00273-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e1d5/6431845/0503e551044e/polymers-09-00273-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e1d5/6431845/a34dae8af552/polymers-09-00273-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e1d5/6431845/dba9287ff3af/polymers-09-00273-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e1d5/6431845/b2d85e1092cd/polymers-09-00273-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e1d5/6431845/879593e25450/polymers-09-00273-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e1d5/6431845/b0d993d2beef/polymers-09-00273-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e1d5/6431845/2a4240f6c7e7/polymers-09-00273-g010a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e1d5/6431845/5abe59fd31d3/polymers-09-00273-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e1d5/6431845/3748fd50cf81/polymers-09-00273-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e1d5/6431845/478d5ef5a099/polymers-09-00273-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e1d5/6431845/593d5022ae11/polymers-09-00273-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e1d5/6431845/0503e551044e/polymers-09-00273-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e1d5/6431845/a34dae8af552/polymers-09-00273-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e1d5/6431845/dba9287ff3af/polymers-09-00273-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e1d5/6431845/b2d85e1092cd/polymers-09-00273-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e1d5/6431845/879593e25450/polymers-09-00273-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e1d5/6431845/b0d993d2beef/polymers-09-00273-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e1d5/6431845/2a4240f6c7e7/polymers-09-00273-g010a.jpg

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