A cellulose-based CO2 capture foam-like porous material for biological carbon fixation

CO 2 capture and release are critical for enhancing photosynthetic efficiency of plants and biomass accumulation. However, achieving efficient capture and directional transport of CO 2 to plants near the source of carbon emissions to boost photosynthetic efficiency are mains an important technical challenge. In this study, we introduce an innovative strategy for fabricating a cellulose-based CO 2 -capture foam-like porous material-DGP, which can significantly enhance the photosynthetic efficiency of tobacco plants. By chemically crosslinking superbranched amino polymers on a lignocellulose substrate, DGP not only exhibits excellent CO 2 capture capacity of 8.01 mmol g −1 at room temperature, but also achieves an effective slow release of CO 2 with a release rate of up to 51 % and a duration of up to 10 h without additional energy input. This characteristic allows DGP to simulate the CO 2 concentration mechanism of plants in nature, thereby increasing the net photosynthetic efficiency of tobacco by 70 % and the intercellular CO 2 concentration by 52 %, which significantly promotes the accumulation of biomass. The utilization of this material has broad application prospects for enhancing the carbon sink capacity of the ecosystem, mitigating the greenhouse effect and improving crop yield.