Hollow metal organic frameworks composite prepared via an 'escape from the cage' strategy

Autor:	Jun Li, Xiang Zhang, Yanmei Zhang, Tianli Dai
Rok vydání:	2019
Předmět:	Superstructure Materials science Mechanical Engineering Composite number technology industry and agriculture Condensed Matter Physics Catalysis Magnetic core Chemical engineering Mechanics of Materials Mass transfer General Materials Science Metal-organic framework Knoevenagel condensation Cage
Zdroj:	Materials Letters. 240:44-46
ISSN:	0167-577X
Popis:	A step-by-step self-assembly and concurrent self-etching strategy that differs from previous methods used to prepare SiO2@UiO-66-NH2 hollow composite has been reported. The magnetic core was selectively etched to generate a hollow metal-organic framework superstructure. The physical and chemical properties were characterized by TEM and SEM techniques, composition by SEM-EDX. Benefit from the efficient mass transfer and enhanced active sites accessibility, the hollow SiO2@UiO-66-NH2 composite showed higher or comparable catalytic activity than the nano-sized UiO-66-NH2 in the Knoevenagel condensation as a solid basic catalyst. Furthermore, it could be recovered and stable in terms of activity and structure when recycled for at least four times.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a91aa880c438c295c0201d379edd657b https://doi.org/10.1016/j.matlet.2018.12.097 Zobrazit plný text záznamu Full Text from ScienceDirect