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This content will become publicly available on April 17, 2019

Title: Room-Temperature Synthesis of Two-Dimensional Metal–Organic Frameworks with Controllable Size and Functionality for Enhanced CO 2 Sorption

Here, two-dimensional (2D) metal-organic frameworks (MOFs), as a newly emerged member of 2D materials, have gained extensive attention due to their great potential in gas separation, sensing, and catalysis. However, it is still challenging to synthesize 2D MOFs with controllable size and functionalities using direct and scalable approaches at mild conditions (e.g., room temperature). Herein, we demonstrated onestep, room-temperature synthesis of a series of 2D MOFs based on Cu(II) paddle-wheel units, where the intrinsically anisotropic building blocks led to the anisotropic growth of 2D MOF nanoparticles, and the pillared structure led to high surface areas. The size of 2D MOFs can be adjusted by using a DMF/H 2O mixed solvent. The thinnest particles were around 3 nm, and the highest aspect ratio was up to 200. The functionalization of 2D MOFs was also achieved by selecting ligands with desired functional groups. The gas sorption results revealed that amino and nitro-functionalized 2D MOFs showed higher CO 2 sorption selectivity over CH 4 and N 2, suggesting these materials can be further applied in natural gas sweetening (CO 2/CH 4 separation) and carbon capture from flue gas (CO 2/N 2 separation).
Authors:
ORCiD logo [1] ; ORCiD logo [1]
  1. The Pennsylvania State Univ., University Park, PA (United States)
Publication Date:
Grant/Contract Number:
FE0026825
Type:
Accepted Manuscript
Journal Name:
Crystal Growth and Design
Additional Journal Information:
Journal Name: Crystal Growth and Design; Journal ID: ISSN 1528-7483
Publisher:
American Chemical Society
Research Org:
Pennsylvania State Univ., University Park, PA (United States)
Sponsoring Org:
USDOE Office of Fossil Energy (FE)
Country of Publication:
United States
Language:
English
Subject:
03 NATURAL GAS
OSTI Identifier:
1434712