Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 2, Pages 2816-2825Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b18012
Keywords
zeolitic imidazolate framework (ZIF-8); polyamidoamine dendrimers; coffee-ring; photonic crystal; organic dye separation
Funding
- National Natural Science Foundation of China [21736006, 21908103]
- Natural Science Foundation of Jiangsu Province [BK20190672]
- China Postdoctoral Science Foundation [2018M642235]
- Fund of State Key Laboratory of Materials-Oriented Chemical Engineering [ZK201704]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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Metal-organic framework (MOF)-directed photonic structure materials have inspired great attention for extended and enhanced functions. However, the direct construction of photonic crystals (PCs) with MOF particles as building blocks still remains a challenge. Herein, we designed and synthesized monodisperse polyamidoamine (PAMAM) dendrimer-modified zeolitic imidazolate framework (ZIF-8) particles (PAMAM@ZIF-8) via a postsynthetic method, rendering ZIF-8 with hydrophilicity. It was found that the PAMAM@ZIF-8 particles could directly assemble into a uniform photonic structure and effectively suppressed the coffee-ring effect, forming homogeneous PC films with different structural colors. A PC pattern with angle-dependent colors was also achieved, which might have potential applications in the field of anticounterfeiting printing. More importantly, by taking advantages of a membrane separation-assisted assembly process, a colorful and robust PC film was accomplished on the surface of reduced graphene oxide (rGO). The hierarchal PAMAM@ZIF-8/rGO film demonstrates a superior separation ability toward organic dye solutions, which enriches the function of PC materials. This work gives a new insight into the fabrication of MOF-based functional PC materials, which will extend the application of PCs in the high selective and effective separation field.
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