Stimulus-responsive adsorbent materials for CO2 capture and separation

CO₂ capture and separation by using adsorbent materials have exhibited great potential for application in strategies that alleviate environmental degradation. Stimulus-responsive adsorbent materials, a kind of advanced functional materials, have recently attracted tremendous interest. These materials can recognize external stimuli and exhibit tunable physical or chemical properties, thus controlling CO₂ adsorption and separation behaviors. This review highlights the recent developments of stimulus-responsive adsorbent materials that can modulate CO₂ capture and separation properties in response to some specific stimuli, including pressure, temperature, light, electric field, magnetic field, guest molecules, and other newly emerging stimuli. To understand stimulus-responsive behaviors in depth, the response mechanisms are summarized and elucidated. This review also proposes future directions in the development of stimulus-responsive materials for CO₂ capture and separation.