A Robust Metal-Organic Framework for Dynamic Light-Induced Swing Adsorption of Carbon Dioxide.
Adsorbents for CO2 capture need to demonstrate efficient release. Light-induced swing adsorption (LISA) is an attractive new method to release captured CO2 that utilizes solar energy rather than electricity. MOFs, which can be tailored for use in LISA owing to their chemical functionality, are often unstable in moist atmospheres, precluding their use. A MOF is used that can release large quantities of CO2 via LISA and is resistant to moisture across a large pH range. PCN-250 undergoes LISA, with UV flux regulating the CO2 desorption capacity. Furthermore, under UV light, the azo residues within PCN-250 have constrained, local, structural flexibility. This is dynamic, rapidly switching back to the native state. Reusability tests demonstrate a 7.3 % and 4.9 % loss in both adsorption and LISA capacity after exposure to water for five cycles. These minimal changes confirm the structural robustness of PCN-250 and its great potential for triggered release applications.
CSIRO, Clayton, VIC 3168, Australia. lihaiqing2014@gmail.com, haiqing.li@csiro.au.
Haiqing
H
Li
CSIRO, Clayton, VIC 3168, Australia.
Marta Rubio
MR
Martinez
Department of Chemistry, Texas A&M University, College Station, Texas, 77843-3255, USA.
Zachary
Z
Perry
Department of Chemistry, Texas A&M University, College Station, Texas, 77843-3255, USA.
Hong-Cai
HC
Zhou
Institute of Physical and Theoretical Chemistry, Graz University of Technology, Stremayrgrasse 9/Z2, 8010, Graz, Austria.
Paolo
P
Falcaro
CSIRO, Clayton, VIC 3168, Australia.
Christian
C
Doblin
CSIRO, Clayton, VIC 3168, Australia.
Seng
S
Lim
CSIRO, Clayton, VIC 3168, Australia.
Anita J
AJ
Hill
CSIRO, Clayton, VIC 3168, Australia.
Barry
B
Halstead
CSIRO, Clayton, VIC 3168, Australia. matthew.hill@csiro.au.|Department of Chemical Engineering, Monash University, Clayton, VIC 3800, Australia. matthew.hill@csiro.au.
Matthew R
MR
Hill
carbon dioxide; gas release; gas storage; metal-organic frameworks; photoswitching