Metal organic frameworks with surface-grafted azobenzene for energy storage

IF 7.4 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Science China Materials Pub Date : 2025-06-25 DOI:10.1007/s40843-025-3396-4

Kai Wang (, ), Mengmeng Qin (, ), Can Chen (, ), Shuo Wang (, ), Wei Feng (, )

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引用次数: 0

Abstract

This study grafted a bulky azobenzene derivative, 4′-aminoazobenzene-4-sulfonic acid (AABS), onto the surface of ZIF-90, thereby preparing a metal-organic framework material, ZIF-90-AABS (ZIF-AABS), with photothermal conversion effects. The template-like effect on the surface of ZIF-AABS enables the reversible cis-trans isomerization of AABS, allowing ZIF-AABS to achieve photochemical energy storage of 5.1 J g⁻¹. Additionally, since AABS is mainly grafted on the surface of ZIF-90, ZIF-AABS retains the crystal structure of ZIF-90 and thus still can encapsulate and adsorb phase change materials (PCMs). By infiltrating the porous structure with the octadecyl alcohol (OD), a composite PCMs, OD/ZIF-AABS, was successfully developed, which effectively realizes phase change energy storage. The latent heat storage energy of OD/ZIF-AABS with maximum OD loading was 121.3 J g⁻¹, and no significant performance degradation was observed after 50 melting/solidifying cycles. This work further expands the application scope of azobenzene and promotes the development of MOFs-based composites for solar energy storage.

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表面接枝偶氮苯的金属有机骨架储能

本研究将体积较大的偶氮苯衍生物4′-氨基偶氮苯-4-磺酸（AABS）接枝到ZIF-90表面，制备了具有光热转化效应的金属-有机骨架材料ZIF-90-AABS （ZIF-AABS）。ZIF-AABS表面的类模板效应使其实现了可逆的顺反异构化，使ZIF-AABS实现了5.1 J g−1的光化学蓄能。此外，由于AABS主要接枝在ZIF-90的表面，因此ZIF-AABS保留了ZIF-90的晶体结构，仍然可以包封和吸附相变材料（pcm）。通过将十八烷基醇（OD）渗透到多孔结构中，制备了一种有效实现相变储能的复合材料——OD/ZIF-AABS。最大OD负荷下，OD/ZIF-AABS的潜热蓄能为121.3 J g−1，在50次熔融/固化循环后，性能没有明显下降。这项工作进一步拓展了偶氮苯的应用范围，促进了mofs基太阳能储能复合材料的发展。

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来源期刊

Science China Materials Materials Science-General Materials Science

CiteScore

11.40

自引率

7.40%

发文量

949

期刊介绍： Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.