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Biological Chitin–MOF Composites with Hierarchical Pore Systems for Air‐Filtration Applications
Author(s) -
Wisser Dorothea,
Wisser Florian M.,
Raschke Silvia,
Klein Nicole,
Leistner Matthias,
Grothe Julia,
Brunner Eike,
Kaskel Stefan
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201504572
Subject(s) - crystallite , materials science , nucleation , metal organic framework , adsorption , composite number , filtration (mathematics) , chemical engineering , composite material , chitin , nanotechnology , chemistry , chitosan , organic chemistry , statistics , mathematics , engineering , metallurgy
Metal–organic frameworks (MOFs) are promising materials for gas‐separation and air‐filtration applications. However, for these applications, MOF crystallites need to be incorporated in robust and manageable support materials. We used chitin‐based networks from a marine sponge as a non‐toxic, biodegradable, and low‐weight support material for MOF deposition. The structural properties of the material favor predominant nucleation of the MOF crystallites at the inside of the hollow fibers. This composite has a hierarchical pore system with surface areas up to 800 m 2 g −1 and pore volumes of 3.6 cm 3 g −1 , allowing good transport kinetics and a very high loading of the active material. Ammonia break‐through experiments highlight the accessibility of the MOF crystallites and the adsorption potential of the composite indicating their high potential for filtration applications for toxic industrial gases.