The Resource Utilization of Poplar Leaves for CO₂ Adsorption.

After further N-doping, with a 1:1 mass ratio of urea to H 3 PO 4 -activated poplar leaves, the CO 2 adsorption capacity increased significantly compared with that of the H 3 PO 4 –activated poplar leaves before N-doping; the CO 2 adsorption capacity ranged between 2.44 and 4.07 mmol/g, and exhibited a decreasing trend as the volume ratio of H 3 PO 4 to poplar leaves increased.

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