Template-free synthesis to micro-meso-macroporous hierarchy in nanostructured MIL-101(Cr) with enhanced catalytic activity

Science China Materials - Tập 64 - Trang 252-258 - 2020
Tian Zhao1,2, Songhe Li1, Yu-Xuan Xiao1, Christoph Janiak3, Ganggang Chang1, Ge Tian1, Xiao-Yu Yang1,4,5
1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, China
2Key Laboratory of Advanced Packaging Materials and Technology of Hunan Province, School of Packaging and Materials Engineering, Hunan University of Technology, Zhuzhou, China
3Institut für Anorganische Chemie und Strukturchemie, Universität Düsseldorf, Düsseldorf, Germany
4Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) & School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai, China
5School of Engineering and Applied Sciences, Harvard University, Cambridge, USA

Tóm tắt

MIL-101(Cr)是最重要的金属有机框架(MOFs)材料之一, 稳定的框架结构和超高的比表面积使其在众多科学领域得到了广泛研究和应用. 但是MIL-101(Cr)的合成条件比较苛刻, 且稳定性较强, 因此, 有关于其分级结构的研究报道仍比较少. 本文提出了一种简单制备分级纳米孔结构MIL-101(Cr)的方法, 即以乙酸作为调节剂, 采用水热合成的方法, 一步得到具有微孔-介孔-大孔分级结构的MIL-101(Cr)材料. 实验结果表明, 该分级结构的MIL-101(Cr)与无分级结构的MIL-101(Cr)相比, 其大分子染料吸附能力和催化能力均有显著提高. 而且分级结构MIL-101(Cr)负载了磷钨酸催化剂之后, 表现出了与均相催化剂(纯磷钨酸)相当的催化能力. 进一 步研究发现, 使用其他短碳链的一元羧酸作为调节剂, 如丙酸、 丁酸等, 也可获得类似分级纳米结构MIL-101(Cr).

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Science China Materials

Tập 64

252-258

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