通过表面引发的缩聚作用制造坚固的共轭聚合物气凝胶,用于阳光驱动的海水淡化和铀提取。

IF 12.2 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Materials Horizons Pub Date : 2024-10-15 DOI:10.1039/D4MH01055H
Yuan Chen, Guang-en Fu, Yu-xiang Zhao, Ke Wang, Meng-wei Chen, Qiang Ma, Shan Li, Jun-Yi Han, Li-sha Liang, Wen-kai Zhao, Peng Xiao, Sheng Wang, Tao Chen and Tao Zhang
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引用次数: 0

摘要

具有低热导率和交联三维网络的气凝胶可以很容易地与功能材料集成,从而最大限度地发挥其功能,实现光热海水淡化和光催化铀提取等多种应用。Sp2C 共轭多孔聚合物(sp2C-CPPs)具有坚固的共轭 CC 连接,具有优异的半导体特性和化学稳定性,是这些应用的理想光敏剂。然而,合成的 sp2C-CPP 粉末的加工性和可收集性有限,阻碍了它们的广泛应用。在此,我们报告了通过表面引发的醛醇缩聚(SI-AP)制备基于 sp2C-CPP(DHA-TMT 和 DBD-TMT)的稳健气凝胶的情况。完全共轭的 CC 骨架和电子捐赠基团(-OH)赋予了 sp2C-CPP 气凝胶卓越的光热转换效率(95.6%)和对铀的强吸附亲和力。尤其是具有亲水多孔通道的 DHA-TMT 气凝胶,在 AM 1.5 G 条件下的蒸发性能高达 1.55 kg m-2 h-1,而光热转换带来的快速传质使其在模拟海水中的铀萃取能力高达 1200 mg m-2。此外,sp2C-CPP 气凝胶在强酸、强碱和盐水溶液中都表现出很高的稳定性。这项工作展示了一种制备均匀且高稳定性的基于 sp2C-CPP 的气凝胶的策略,可同时提高其光热和光催化性能。
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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Engineering of robust conjugated polymer-based aerogels via surface-initiated polycondensation towards sunlight-driven seawater desalination and uranium extraction†

The aerogels with low thermal conductivity and cross-linked 3D networks can be easily integrated with functional materials to maximize their functionalities, realizing diverse applications such as photothermal seawater desalination and photocatalytic uranium extraction. Sp2C-conjugated porous polymers (sp2C-CPPs) with robust and conjugated CC linkages are ideal photosensitizers for these applications, owing to their exceptional semiconducting properties as well as chemical stability. However, the limited processability and collectability of as-synthesized sp2C-CPP powders impede their extended applications. Herein, we report the preparation of robust sp2C-CPP (DHA-TMT and DBD-TMT) based aerogels via surface-initiated aldol polycondensation (SI-AP). The fully conjugated CC skeletons and electron-donating groups (–OH) endow the sp2C-CPP aerogels with excellent photothermal conversion efficiency (95.6%) and strong affinity for uranium adsorption. In particular, the DHA-TMT aerogel with hydrophilic porous channel exhibits a superb evaporation performance achieving ∼1.55 kg m−2 h−1 under AM 1.5 G while the fast mass transfer caused by photothermal conversion increases the uranium extraction capacity up to 1200 mg m−2 in simulated seawater. Moreover, the sp2C-CPP aerogels demonstrate high stability under strong acid, base and brine solutions. This work shows a strategy for the preparation of uniform and high stability sp2C-CPP-based aerogels to simultaneously enhance their photothermal and photocatalytic performance.

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来源期刊
Materials Horizons
Materials Horizons CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
18.90
自引率
2.30%
发文量
306
审稿时长
1.3 months
期刊介绍: Materials Horizons is a leading journal in materials science that focuses on publishing exceptionally high-quality and innovative research. The journal prioritizes original research that introduces new concepts or ways of thinking, rather than solely reporting technological advancements. However, groundbreaking articles featuring record-breaking material performance may also be published. To be considered for publication, the work must be of significant interest to our community-spanning readership. Starting from 2021, all articles published in Materials Horizons will be indexed in MEDLINE©. The journal publishes various types of articles, including Communications, Reviews, Opinion pieces, Focus articles, and Comments. It serves as a core journal for researchers from academia, government, and industry across all areas of materials research. Materials Horizons is a Transformative Journal and compliant with Plan S. It has an impact factor of 13.3 and is indexed in MEDLINE.
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