ZIF-8 self-etching method for Au/polydopamine hybrid cubic microcapsules with modulated nanostructures
| Autor: | Ailing Hui, Qinshan Xiong, Qunling Fang, Shouhu Xuan, Linfeng Bai, Jinyu Duan, Hua-Jian Xu, Ken Cham-Fai Leung, Kezhu Xu, Yuhang Sun |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Nanostructure Nanocomposite 02 engineering and technology General Chemistry engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Template Adsorption Polymerization chemistry Nanocrystal Coating Chemical engineering Imidazolate engineering General Materials Science 0210 nano-technology |
| Zdroj: | CrystEngComm. 21:6935-6944 |
| ISSN: | 1466-8033 |
| DOI: | 10.1039/c9ce01426h |
| Popis: | Metal–organic framework (MOF)-derived nanostructures exhibit wonderful characteristics and possess broad application potential by modulating the complex composition and inner nanostructure. Although various MOF-based nanocomposites have been successfully developed, a facile method that can easily modulate the structure-dependent chemical components of the MOF-derived hybrids remains a challenge. By coating zeolitic imidazolate framework-8 (ZIF-8) with Au/polydopamine (Au/PDA) via in situ redox-oxidation polymerization of HAuCl4 and dopamine, it was found that the ZIF-8 templates were simultaneously etched off to give Au/PDA hybrid microcapsules with a cubic shape. This one-step sacrificial templating process followed a competing chelation between gold ions and Zn2+ cations to 2-methylimidazole and PDA; thus, both the hollow and the yolk-like hybrid cubic microcapsules were controllably obtained by varying the synthetic dynamics. Owing to the hollow nature, penetrated PDA shell, well-distributed Au nanocrystals, and unique stable nanostructure, the non-spherical Au/PDA hybrid cubic microcapsules showed high performance in catalyzing the reduction of 4-nitrophenol as well as adsorption/release of ibuprofen as a model drug. Moreover, this simple strategy offers a controllable design in developing multifunctional nanocomposites with definite inner nanostructures and activities for nanocatalysis, drug delivery, energy storage etc. |
| Databáze: | OpenAIRE |
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