基于锌配位的石墨烯/偶氮苯光热材料

高文超; 冯奕钰; 封伟

doi:10.14133/j.cnki.1008-9357.20210404001

基于锌配位的石墨烯/偶氮苯光热材料

doi: 10.14133/j.cnki.1008-9357.20210404001

天津大学材料科学与工程学院，天津 300072

基金项目: 国家自然科学基金重点项目（51633007）；国家自然科学基金面上项目（51973152）

详细信息

作者简介:
高文超（1996—），男，硕士生，主要研究方向为光热能复合材料的制备。E-mail：gaowc@tju.edu.cn

通讯作者:
封伟，E-mail：weifeng@tju.edu.cn

中图分类号: O625.64
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- 被引次数: 0
出版历程
- 收稿日期: 2021-04-04
- 网络出版日期: 2021-06-09
- 刊出日期: 2022-05-23

Graphene/Azobenzene Photothermal Material Based on Zinc Coordination

School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China

摘要

摘要: 为了提高偶氮苯基复合材料的能量密度，通过锌离子（Zn²⁺）与接枝到还原氧化石墨烯上的4-硝基-4′-氨基偶氮苯（AGO）配位的方法，成功制备出了具有阴阳离子相互作用的石墨烯/偶氮苯复合材料（AGO/Zn）。研究表明，石墨烯模板上偶氮苯的光异构化和离子可逆相互作用的协同效果使材料能量密度大幅提高。在紫外光（365 nm）照射4 h后，AGO/Zn的能量密度达到最大值（504.2 J/g），约为AGO能量密度的1.69倍。
- 石墨烯/偶氮苯 /
- 能量密度 /
- 锌离子
Abstract: Azobenzene has two configurations which are trans-configuration and cis-configuration. As a photo-isomerization molecule, azobenzene can transfer from trans-configuration in low energy state to cis-configuration in a high energy state under the irradiation of ultraviolet light (UV), which is the process of photo-isomerization. Herein, azobenzene and its derivatives are used in different industries and fields. However, due to their low energy density compared with other molecular solar thermal energy storage (MOST) like anthracene and norbornadiene, their applications in energy storage are influenced severely. The purpose of this paper is to find a method to solve the problem above. In this paper, 4-nitro-4'- aminoazobenzene (Azo) was grafted onto reduced graphene oxide (rGO) by the coupling reaction and then interacted with ZnCl₂ to get the azobenzene graphene composite with zinc ion interaction (AGO/Zn). There are two mechanisms of energy storage/release in this method, photoisomerization of azobenzene onto graphene template, and ion interaction formation/destruction, which is a unique attempt to improve energy density through multiple mechanisms of heat release. It has been proved that the nanoscale templates have a significant effect on improving the energy density of azobenzene derivatives. FT-IR spectroscopy show that AGO/Zn is successfully prepared by this method. Moreover, the maximum energy density of that is up to 504.2 J/g under the irradiation of UV (365 nm) for 4 h, which is about 1.69 times of the azobenzene graphene composite (AGO) without ion interaction. Results show that the introduction of zinc and graphene templates greatly improves the energy density of azobenzene, which provides a reference for the development and application of azobenzene composites with multiple mechanisms of energy storage in the future.
- graphene/azobenzene /
- energy density /
- zinc ion

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图 1 AGO 的合成

Figure 1. Synthesis of AGO

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图 2 AGO/Zn的制备示意图

Figure 2. Schematic diagram of preparation of AGO/Zn

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图 3 AGO/Zn的（a） FT-IR光谱和（b）XPS能谱

Figure 3. （a） FT-IR spectra and （b） XPS pattern of AGO/Zn

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图 4 样品的FESEM照片

Figure 4. FESEM images of samples

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图 5 （a） AGO 和AGO/Zn，（b）不同紫外（365 nm）照射时间的AGO/Zn的DSC曲线

Figure 5. DSC curves of （a） AGO and AGO/Zn, （b） AGO/Zn under different irradiation time of UV （365 nm）

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