一种用于高效吸附水溶液中三硝基甲苯的耐高温苯并咪唑基多孔聚合物

IF 2.7 3区 化学 Q2 POLYMER SCIENCE Journal of Applied Polymer Science Pub Date : 2024-09-19 DOI:10.1002/app.56259
Chunyan Yang, Shijie Mo, Xirui Chen, Qianqian Yuan, Jiali Zhu, Ting Wang, Min Zheng, Mingru Zhou, Guanjun Chang, Yewei Xu
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引用次数: 0

摘要

以自合成的 1,3,5-三(1H-苯并[d]咪唑-2-基)苯(TBI)和 4,4′-二氟二苯甲酮为主要原料,通过 CN 偶联反应合成了一种新型苯并咪唑基多孔聚合物(简称 PTBI),随后进行了冷冻干燥处理。PTBI 的热稳定性值得称道,在 475°C 的温度下,重量损失仅为 5%,而在 800°C 的温度下,炭产量高达 65%。在三种 π-π 相互作用和一种偶极-π 相互作用的共同作用下,PTBI 在水溶液中有效地吸附了三硝基甲苯(TNT)。此外,热力学分析表明,PTBI 对 TNT 的吸附是一个自发的放热过程,随后熵值下降。值得注意的是,使用丙酮作为洗脱剂,经过五个吸附和解吸循环后,吸附效率稳定在一个相对较高的水平。这些令人鼓舞的结果凸显了 PTBI 在 TNT 废水处理领域的巨大潜力,使其成为该领域极端条件下进一步研究和应用的理想候选材料。
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A high-temperature resistant benzimidazole-based porous polymer for efficient adsorption of trinitrotoluene in aqueous solution
A novel benzimidazole-based porous polymer, denoted as PTBI, was synthesized utilizing self-synthesized 1,3,5-tris(1H-benzo[d]imidazol-2-yl)benzene (TBI) and 4,4′-difluorobenzophenone as primary materials via a CN coupling reaction, followed by a freeze-drying process. PTBI displayed commendable thermal stability, as evidenced by a temperature of 475°C at which a 5% weight loss occurred and a char yield of up to 65% at 800°C. Trinitrotoluene (TNT) was effectively adsorbed by PTBI in aqueous solutions, thanks to the combined effects of three π–π interactions and one dipole–π interaction. At 25°C, PTBI achieved a maximum adsorption capacity as high as 280.8 mg/g, with approximately 60% of this capacity attained within just 1 h. Furthermore, a thermodynamic analysis showed that the adsorption of TNT by PTBI was a spontaneous, exothermic process that was followed by a decrease in entropy. It is noteworthy that following five adsorption and desorption cycles, the adsorption efficiency held steady at a relatively high level using acetone as the eluent. These promising results underscore PTBI's significant potential in the realm of TNT wastewater treatment, positioning it as a compelling candidate for further research and application under extreme condition in this field.
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来源期刊
Journal of Applied Polymer Science
Journal of Applied Polymer Science 化学-高分子科学
CiteScore
5.70
自引率
10.00%
发文量
1280
审稿时长
2.7 months
期刊介绍: The Journal of Applied Polymer Science is the largest peer-reviewed publication in polymers, #3 by total citations, and features results with real-world impact on membranes, polysaccharides, and much more.
期刊最新文献
Editorial Board, Aims & Scope, Table of Contents Editorial Board, Aims & Scope, Table of Contents Editorial Board, Aims & Scope, Table of Contents Editorial Board, Aims & Scope, Table of Contents Cover Image, Volume 141, Issue 43
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