Interfacial co-assembly strategy towards gradient mesoporous hollow sheet for molecule filtration

文献类型： 外文期刊

第一作者： Dong, Yangbo

作者： Dong, Yangbo;Li, Wei;Zhang, Rui;Wang, Luoqi;Yang, Yan;Qiao, Zhen-An;Feng, Danyang;Dou, Shuzhen;Wang, Li;Yang, Yang;Wei, Feng

作者机构：

期刊名称：NPG ASIA MATERIALS （ 影响因子：9.7； 五年影响因子：10.5 ）

ISSN： 1884-4049

年卷期： 2023 年 15 卷 1 期

页码：

收录情况： SCI

摘要： Gradient porous structures enable the fast capillary-directed mass transport and enhance the chemical reaction rate with optimal efficiency and minimal energy consumption. Rational design and facile synthesis of functional mesoporous materials with sheet structure and gradient mesopores still face challenges of stacked structures and unadjustable pore sizes. Herein, an interfacial co-assembly strategy for gradient mesoporous hollow silica sheets is reported. The modulated oil-water interface allows the assembly of gradient mesoporous silica layers on the water-removable ammonium sulfate crystals. The obtained mesoporous silica layers possess narrow pore size distributions (similar to 2.2 nm and similar to 6.6 nm). Owing to the good mono-dispersity, sheet structure and proper pore size, the designed gradient mesoporous hollow silica sheets can serve as flexible building blocks for fabricating nanoscale molecule filtration device. Experiments reveal that the obtained nanofiltration device shows remarkable gradient rejection rates (range from 23.5 to 99.9%) for molecules with different sizes (range from 1.2 to 4.4 nm).

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