Efficient nitrogen doped porous carbonaceous CO_(2) adsorbents based on lotus leaf

作     者：Qian Li Shenfang Liu Linlin Wang Fangyuan Chen Jiawei Shao Xin Hu Qian Li;Shenfang Liu;Linlin Wang;Fangyuan Chen;Jiawei Shao;Xin Hu

作者机构：Key Laboratory of the Ministry of Education for Advanced Catalysis MaterialsZhejiang Normal UniversityJinhua 321004China College of EngineeringZhejiang Normal UniversityJinhua 321004China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2021年第33卷第5期

页      面：268-278页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the Zhejiang Provincial Natural Science Foundation(No.LY21B070005) National Undergraduate Training Program for Innovation and Entrepreneurship of China(No.202010345025) 

主　　题：CO_(2)capture N-doped porous carbon Biomass materials Melamine KOH activation 

摘      要：In this work, the waste biomass lotus leaf was converted into N-doped porous carbonaceous CO_(2) adsorbents. The synthesis process includes carbonization of lotus leaf, melamine post-treatment and KOH activation. For the resultant sorbents, high nitrogen content can be contained due to the melamine modification and advanced porous structure were formed by KOH etching. These samples were carefully characterized by different techniques and their CO_(2) adsorption properties were investigated in detail. These sorbents hold good CO_(2) adsorption abilities, up to 3.87 and 5.89 mmol/g at 25 and 0 °C under 1 bar, respectively. By thorough investigation, the combined interplay of N content and narrow microporous volume was found to be responsible for the CO_(2) uptake for this series of sorbents. Together with the high CO_(2) adsorption abilities, these carbons also display excellent reversibility, high CO_(2)/N 2 selectivity, applicable heat of adsorption, fast CO_(2) adsorption kinetics and good dynamic CO_(2) adsorption capacity. This study reveals a universal method of obtaining N-doped porous carbonaceous sorbents from leaves. The low cost of raw materials accompanied by easy synthesis procedure disclose the enormous potential of leaves-based carbons in CO_(2) capture as well as many other applications.