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Potential photo-switching sorbents for CO2 capture – A review

Qiao, Yuanting; Bailey, Josh J.; Huang, Qi; Ke, Xuebin; Wu, Chunfei


Yuanting Qiao

Josh J. Bailey

Qi Huang

Chunfei Wu


Porous materials with photochromic units are currently under investigation as light allows for environmentally friendly and highly energy-efficient control for gas separation and storage, chemical sensing, and drug delivery. In the application of photo-switching materials to CO2 capture, researchers have tried to endow a diversity of porous materials such as metal-organic frameworks and porous organic polymers with photo-responsive units. This review highlights photochromic units and methods used for different types of photo-responsive adsorbents of CO2 and some examples of adsorbents with photo-switching properties. These sorbents are also promising for application to direct air capture of CO2. In particular, the cost of adsorbent regeneration could be reduced by using sorbents with light-induced regeneration. The key purpose of this review is to motivate more research into photo-switching sorbents for CO2 capture with the control of capture or release by simply switching the light on and off.


Qiao, Y., Bailey, J. J., Huang, Q., Ke, X., & Wu, C. (2022). Potential photo-switching sorbents for CO2 capture – A review. Renewable & sustainable energy reviews, 158, Article 112079.

Journal Article Type Review
Acceptance Date Jan 3, 2022
Online Publication Date Jan 18, 2022
Publication Date 2022-04
Deposit Date Mar 17, 2022
Publicly Available Date Jan 19, 2023
Journal Renewable and Sustainable Energy Reviews
Print ISSN 1364-0321
Electronic ISSN 1879-0690
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 158
Article Number 112079
Keywords CO2 capture; Sorbent regeneration; Photoresponsivity; Photo-switch; Direct air capture; Photochromic compounds
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