Tan Yifan, Wang Xiaoqiang, Song Shen, Sun Meijiao, Xue Yuhua, Yang Guangzhi
School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.
ACS Omega. 2021 Sep 15;6(38):24814-24825. doi: 10.1021/acsomega.1c03664. eCollection 2021 Sep 28.
Nitrogen-doped cellulose-based porous carbon materials were obtained by hydrothermal method and KOH chemical activation together with melamine as a nitrogen-doping precursor. The effects of hydrothermal temperature on the microstructure and surface morphology of the products were mainly studied. Also, the carbon dioxide adsorption capacity of the prepared porous carbon was investigated. It was found that when the hydrothermal carbonization temperature was 270 °C and the mass ratio of cellulose and melamine was 1:1, the largest micropore specific surface area of 1703 m·g and micropore volume of 0.65 cm·g were obtained, with a nitrogen-doping composition of 1.68 atom %. At the temperature of 25 °C and under the pressure of 0.1, 0.2, 0.3, and 0.4 MPa, the adsorption amount of CO was 1.56, 3.79, 5.42, and 7.34 mmol·g, respectively. Also, the adsorption process of CO was in good accordance with the Freundlich isotherm model.
以三聚氰胺为氮掺杂前驱体，通过水热法和KOH化学活化制备了氮掺杂纤维素基多孔碳材料。主要研究了水热温度对产物微观结构和表面形貌的影响。此外，还研究了制备的多孔碳对二氧化碳的吸附性能。结果表明，当水热碳化温度为270℃，纤维素与三聚氰胺的质量比为1:1时，获得了最大的微孔比表面积1703 m²·g和微孔体积0.65 cm³·g，氮掺杂组成为1.68原子%。在25℃温度和0.1、0.2、0.3和0.4 MPa压力下，CO₂的吸附量分别为1.56、3.79、5.42和7.34 mmol·g。此外，CO₂的吸附过程与Freundlich等温线模型吻合良好。
