seen from Figure . Comparing the amount of CO2 adsorbed and desorbed per cycle, Figure . shows a 1-to-1 transfer for each of the 10 cycles. Additionally, over 93 cycles, the ratio of CO2 adsorbed and desorbed remained constant, but the CO2 capacity decreased by 0.096 mmol CO2/g PEI, equivalent to 4% (Figure ). Leaching or thermal degradation of the PEI is known to occur, especially in dry and dilute CO2 flow conditions. Compared to the few reports of cycling experiments in similar conditions, no degradation over 10 cycles and 7% degradation over 25 cycles, our value seems promising, especially because the photo-swing approach allows for the optimization of illumination duration or power to prolong the material durability. However, these cycling experiments were performed under simulated conditions in the absence of oxygen. Thanks to the recent overview on the competing kinetic pathways of oxidative degradation of PEI, it is expected that the mild degradation we observe could be accentuated when cycling under reallife operation if oxygen is not purged from the sorbent prior to illumination. Despite mild degradation over 93 cycles, PEI exhibits compatibility with the photo-induced local heating. LEDs with a 385 nm and 625 nm were tested and compared with a broadband light, also referred to as white light. For each LED, the set current was varied according to the LED's range (0 -1000 mA for white and red light, 0 -700 mA for UV light) and the associated irradiance (10 -420 mW/cm 2 ), also referred to as power density, was measured and is summarized in Table . The amount of CO2 was measured under these conditions for dry and humid CO2 gas flow, as shown in Figure A. and B.,