Potential photo-switching sorbents for CO2 capture – A review. (April 2022)

• Record Type: Journal Article
• Authors: Qiao, Yuanting; Bailey, Josh J.; Huang, Qi; Ke, Xuebin; Wu, Chunfei
• Is Part Of: Renewable & sustainable energy reviews. Volume 158(2022)
• Publication Date: 2022-04
• Subjects: CO2 capture -- Sorbent regeneration -- Photoresponsivity -- Photo-switch -- Direct air capture -- Photochromic compounds; Renewable energy sources -- Periodicals; Power resources -- Periodicals; Énergies renouvelables -- Périodiques; Ressources énergétiques -- Périodiques; 333.794
• DOI: 10.1016/j.rser.2022.112079
• Languages: English
• ISSNs: 1364-0321

Abstract

Abstract: 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. Highlights: Using light to regenerate the adsorbents is promising for carbon capture. Photochromic units can be embedded into photo-switching sorbents. Photo-switching metal-organic frameworks and porous organic polymers are reported. Photo-switching sorbents may be applied to direct air capture of CO2 .