功能组修改的UiO-66对氨基酸脱的作用
Senliang Xi1, Dawei Xu1, Renzeng Chen1
1Key Laboratory of Cluster Science Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Advanced Research Institute of Multidisciplinary Science, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China.
在UiO-66中纳米封闭的氨基 (AB) 显示出改善的释放. 功能组的修改,特别是与-OH,显著提高固态储存材料的脱特性.
科学领域:
- 材料科学 材料科学 材料科学
- 化学 化学 化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 氨基 (AB) 是固态存的一个有前途的材料,因为它的高容量.
- 像UiO-66这样的金属有机框架 (MOF) 中的纳米封闭可以降低释放温度.
- 在MOF中链接器的功能化提供了一条调整脱特性的途径.
研究的目的:
- 为了研究功能组修改对UiO-66链接器对氨储存的影响.
- 在脱过程中探索功能组和氨酸之间的相互作用机制.
- 为设计基于MOF的先进存材料提供理论基础.
主要方法:
- 使用铁酸衍生物合成功能化的UiO-66.
- 氨/UiO-66复合物的制备.
- 对释放的含量和脱特性进行分析.
- 使用计算方法研究非共价相互作用.
主要成果:
- 与未经修改的0.5AB/UiO-66 (1.98 wt.%) 相比,与-OH组 (UiO-66-2OH) 功能化的UiO-66显著增加了释放的含量,达到3.85 wt.
- -NH2和-OH组与-BH3具有首选的吸附性,与AB有直接的H-H相互作用,促进脱.
- -NO2, -Br和 -F组通过改变原子电荷密度间接影响了AB脱.
结论:
- 功能组修改MOF链接器是一种有效的策略,可以增强用于储存的氨酸脱.
- 功能组的性质决定了相互作用机制 (直接或间接) 以及它对释放的影响.
- 这项研究为高性能纳米封闭氨合金复合材料的合理设计提供了宝贵的见解.
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