点击化学诱导的共价有机框架/纤维素气凝胶改性用于去除染料和重金属离子

IF 5.4 3区 材料科学 Q2 CHEMISTRY, PHYSICAL
Yunfeng Guo, Weihua Gong, Linlin Zhao, Yanxiao Yang, Xiaoqian Zhou, Zefang Xiao, Yanjun Xie, Yonggui Wang
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引用次数: 0

摘要

在可持续发展的背景下,有害废水处理需求的不断增长凸显了开发用于去除和分离污染物的创新型纤维素吸附剂的重要性。本研究介绍了一种新型气凝胶,它由乙烯基官能团共价有机框架(COFs)和纤维素纳米纤维组成,COFs 是通过在胺化纤维素纳米纤维(ACNFs)上原位生长 COFs 合成的。气凝胶表面富含活性官能团(羟基、氨基、醛、苯等),可与污染物发生多种物理和化学作用。此外,还采用了一种涉及硫醇-烯点击反应的简单后改性策略来改性表面乙烯基,从而产生了两种新型气凝胶(ACNF/COF-COOH 和 ACNF/COF-SH),可增强与不同水体污染物的相互作用,特别是通过去除亚甲基蓝(MB)等阳离子染料和重金属。ACNF/COF-COOH 气凝胶对甲基溴的最大吸附容量为 563.0 毫克/克,而 ACNF/COF-SH 气凝胶对重金属离子的去除具有高选择性,其汞离子(Hg2+)分布系数(Kd)为 22,782.0 毫升/克。这种新型纤维素基气凝胶为去除水体中的污染物提供了巨大的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Click chemistry-induced modification of covalent organic framework/cellulose aerogels for removal of dye and heavy metal ions

Click chemistry-induced modification of covalent organic framework/cellulose aerogels for removal of dye and heavy metal ions

In the context of sustainable development, the escalating need for hazardous wastewater treatment underscores the importance of developing innovative cellulose adsorbents for pollutant removal and separation. This study introduces a novel aerogel composed of a vinyl-functional covalent organic framework (COFs) and cellulose nanofibrils synthesized via in situ growth of COFs on aminated cellulose nanofibers (ACNFs). The aerogel’s surface is enriched with active functional groups (hydroxyl, amino, aldehyde, benzene, etc.), enabling diverse physical and chemical interactions with pollutants. Furthermore, a simple post-modification strategy involving thiol-ene click reactions was employed to modify the surface vinyl groups, resulting in two new aerogels (ACNF/COF-COOH and ACNF/COF-SH) to enhance interactions with different aqueous pollutants, specifically by targeting the removal of cationic dyes such as methylene blue (MB) and heavy metals. ACNF/COF-COOH aerogel exhibited a maximum adsorption capacity of 563.0 mg/g for MB, while ACNF/COF-SH aerogel demonstrated high selectivity for heavy metal ion removal, with a mercury ion (Hg2+) distribution coefficient (Kd) of 22,782.0 mL/g. This novel cellulose-based aerogel offers significant potential for removing pollutants from water bodies.

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来源期刊
ACS Applied Energy Materials
ACS Applied Energy Materials Materials Science-Materials Chemistry
CiteScore
10.30
自引率
6.20%
发文量
1368
期刊介绍: ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.
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