TY - JOUR
T1 - Photo-switchable smart metal-organic framework membranes with tunable and enhanced molecular sieving performance
AU - Liu, Chuanyao
AU - Jiang, Yunzhe
AU - Zhou, Chen
AU - Caro, Jürgen
AU - Huang, Aisheng
N1 - Publisher Copyright:
© The Royal Society of Chemistry.
PY - 2018
Y1 - 2018
N2 - Developing a novel MOF membrane material with switchable separation performance is an exciting and challenging research project. In the present work, we report preparation of a new kind of light induced smart MOF membrane, i.e., Cu(AzDC)(4,4′-BPE) 0.5 membrane, which shows (i) enhanced molecular sieving performance, and (ii) is able to respond quickly to external light stimuli. Two photo-switchable moieties are addressed in the Cu(AzDC)(4,4′-BPE) 0.5 membrane: azobenzene and bis(4-pyridyl)ethylene. When the Cu(AzDC)(4,4′-BPE) 0.5 membrane is in situ irradiated with Vis and UV light, the separation factor of a H 2 /CO 2 mixture can be switched reversibly between 21.3 and 43.7. This switching effect is mainly caused by reduced CO 2 adsorption in the UV-cis state as proven by independent adsorption studies. For a steric reason, adsorption of CO 2 is limited for the UV-cis state. In full agreement with this model, the adsorption of other gases H 2 , CH 4 and N 2 as well as their permeation behaviour is not observably influenced by the trans-cis switching.
AB - Developing a novel MOF membrane material with switchable separation performance is an exciting and challenging research project. In the present work, we report preparation of a new kind of light induced smart MOF membrane, i.e., Cu(AzDC)(4,4′-BPE) 0.5 membrane, which shows (i) enhanced molecular sieving performance, and (ii) is able to respond quickly to external light stimuli. Two photo-switchable moieties are addressed in the Cu(AzDC)(4,4′-BPE) 0.5 membrane: azobenzene and bis(4-pyridyl)ethylene. When the Cu(AzDC)(4,4′-BPE) 0.5 membrane is in situ irradiated with Vis and UV light, the separation factor of a H 2 /CO 2 mixture can be switched reversibly between 21.3 and 43.7. This switching effect is mainly caused by reduced CO 2 adsorption in the UV-cis state as proven by independent adsorption studies. For a steric reason, adsorption of CO 2 is limited for the UV-cis state. In full agreement with this model, the adsorption of other gases H 2 , CH 4 and N 2 as well as their permeation behaviour is not observably influenced by the trans-cis switching.
UR - https://www.scopus.com/pages/publications/85058370886
U2 - 10.1039/C8TA10541C
DO - 10.1039/C8TA10541C
M3 - 文章
AN - SCOPUS:85058370886
SN - 2050-7488
VL - 6
SP - 24949
EP - 24955
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 48
ER -
