介孔材料
催化作用
材料科学
胶束
化学工程
吸附
纳米颗粒
壳体(结构)
纳米技术
多孔性
化学
有机化学
水溶液
复合材料
工程类
作者
Furui Zhang,Xiaobing Hu,Eric W. Roth,Yonghwi Kim,SonBinh T. Nguyen
标识
DOI:10.1021/acs.chemmater.0c01065
摘要
A hierarchically mesoporous (HM) UiO-66-F4 shell with ∼8 nm mesopores can be iteratively grown on top of UiO-66 nanoparticle (NP) seeds over several cycles templated by Pluronic F-127 micelles. Presumably, the Pluronic micelles that were formed in water can surround UiO-66 NPs to facilitate the overgrowth of an HM-UiO-66-F4 shell in the presence of ZrIV precursors and BDC-F4 linkers. The UiO-66 NP seeds play an important role in directing the continuous growth of the HM-UiO-66-F4 shell, as only a nonporous phase was obtained in their absence. This template-assisted, seed-mediated method can be extended to produce other UiO-66-X (X = (OH)2, (COOH)2, etc.) shells, demonstrating its generality for the UiO-66 family of metal–organic frameworks. Notably, the incorporation of mesopores into the thrice-overgrown UiO-66@HM|3rd-UiO-66-F4 materials leads to impressive enhancements in the per-mass uptake capacity of Direct Blue 86, a large anionic dye: 320% better than the parent UiO-66 seeds and 150% better than that for a [UiO-66 + UiO-66-F4] physical mixture at the same mass proportion. Similar enhancements were also observed in the catalyzed oxidation of thioanisole.
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