Gel transformation as a general strategy for fabrication of highly porous multiscale MOF architectures.

Autor:	Liu Z; Division of Environment and Sustainability, The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong SAR China kekyeung@ust.hk keweihan@ust.hk.; HKUST Shenzhen Research Institute Hi-tech Park Shenzhen 518057 China.; HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute, Futian Shenzhen China., Navas JL; Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong SAR China., Han W; Division of Environment and Sustainability, The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong SAR China kekyeung@ust.hk keweihan@ust.hk.; HKUST Shenzhen Research Institute Hi-tech Park Shenzhen 518057 China.; HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute, Futian Shenzhen China.; Guangzhou HKUST Fok Ying Tung Research Institute Nansha IT Park Guangzhou 511458 China., Ibarra MR; Instituto de Nanociencia y Materiales de Aragón (INMA), Laboratory of Advanced Microscopies (LMA), Universidad de Zaragoza 50018 Zaragoza Spain.; Departamento de Física de la Materia Condensada, Facultad de Ciencias, Universidad de Zaragoza 50009 Zaragoza Spain., Cho Kwan JK; Division of Environment and Sustainability, The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong SAR China kekyeung@ust.hk keweihan@ust.hk.; HKUST Shenzhen Research Institute Hi-tech Park Shenzhen 518057 China.; HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute, Futian Shenzhen China., Yeung KL; Division of Environment and Sustainability, The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong SAR China kekyeung@ust.hk keweihan@ust.hk.; Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong SAR China.; HKUST Shenzhen Research Institute Hi-tech Park Shenzhen 518057 China.; HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute, Futian Shenzhen China.; Guangzhou HKUST Fok Ying Tung Research Institute Nansha IT Park Guangzhou 511458 China.
Jazyk:	angličtina
Zdroj:	Chemical science [Chem Sci] 2023 Jun 14; Vol. 14 (26), pp. 7114-7125. Date of Electronic Publication: 2023 Jun 14 (Print Publication: 2023).
DOI:	10.1039/d3sc00905j
Abstrakt:	The structure and chemistry of metal-organic frameworks or MOFs dictate their properties and functionalities. However, their architecture and form are essential for facilitating the transport of molecules, the flow of electrons, the conduction of heat, the transmission of light, and the propagation of force, which are vital in many applications. This work explores the transformation of inorganic gels into MOFs as a general strategy to construct complex porous MOF architectures at nano, micro, and millimeter length scales. MOFs can be induced to form along three different pathways governed by gel dissolution, MOF nucleation, and crystallization kinetics. Slow gel dissolution, rapid nucleation, and moderate crystal growth result in a pseudomorphic transformation (pathway 1) that preserves the original network structure and pores, while a comparably faster crystallization displays significant localized structural changes but still preserves network interconnectivity (pathway 2). MOF exfoliates from the gel surface during rapid dissolution, thus inducing nucleation in the pore liquid leading to a dense assembly of percolated MOF particles (pathway 3). Thus, the prepared MOF 3D objects and architectures can be fabricated with superb mechanical strength (>98.7 MPa), excellent permeability (>3.4 × 10 -10 m 2 ), and large surface area (1100 m 2 g -1 ) and mesopore volumes (1.1 cm 3 g -1 ). Competing Interests: Z. L., W. H., and K. L. Y. have a provisional patent application related to this work filed with the U.S. Patent and Trademark Office on 30 July 2021 (63227351). (This journal is © The Royal Society of Chemistry.)
Databáze:	MEDLINE
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