Bioinspired inhibition of aggregation in metal-organic frameworks (MOFs)

被引：8

作者：

Yu, Licheng ^{[1
]}

Nie, Zhihao ^{[1
]}

Xie, Sicong ^{[1
]}

Jiang, Lili ^{[1
]}

Xia, Baokai ^{[1
]}

Li, Ming ^{[1
]}

Cheng, Chi ^{[1
]}

Duan, Jingjing ^{[1
]}

Antonietti, Markus ^{[2
]}

Chen, Sheng ^{[1
,3
]}

机构：

[1] Nanjing Univ Sci & Technol, Sch Chem & Chem Engn, Sch Energy & Power Engn, Key Lab Soft Chem & Funct Mat,Minist Educ, Nanjing 210094, Peoples R China

[2] Univ Melbourne, Dept Chem Engn, Parkville, Vic, Australia

[3] Max Planck Inst Colloids & Interfaces, D-14476 Potsdam, Germany

来源：

ISCIENCE | 2023年 / 26卷 / 03期

基金：

澳大利亚研究理事会;

关键词：

SEPARATION; PERFORMANCE;

D O I：

10.1016/j.isci.2023.106239

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Different from traditional procedures of using solid stabilizers like polymers and surfactants, here we demonstrate that water, as a very "soft"matter, could func-tion as a "spacer"to prevent the aggregation of metal-organic frameworks (MOFs) in aqueous dispersions. Our theoretical calculations reveal in case of an excess of positively charged metal nodes of MOFs, where water molecules are ligated to metal nodes that greatly enhance MOFs' solution dispersibility through electrostatic stabilization. This discovery has motivated us to develop a facile experimental approach for producing a category of "clean"MOF dispersions without foreign additives. Potential application has been demonstrated for the size fractionation of MOFs, which results in small-size MOFs (50-80 nm) character-istic of superior electrocatalytic oxygen evolution activities (256 mV at 10 mA cm(-2) , Tafel slope of 49 mV dec(-1) and durability >30 h). This work would provide new clues for aqueous processing of MOFs for many emerging applications.

引用

页数：14

共 42 条

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