| Title: | Effect of nitrogen functional groups on competitive adsorption between toluene and water vapor onto nitrogen-doped spherical resorcinol-formaldehyde resin-based activated carbon |
| Author(s): | Li J; Cheng T; Ma X; Hou X; Wu H; Yang L; |
| Address: | "Key Laboratory of Energy Thermal Conversion and Control, Ministry of Education, School of Energy and Environment, Southeast University, #2 Sipailou Road, Nanjing, Jiangsu, 210096, People's Republic of China. School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, Jiangsu, 210042, People's Republic of China. Key Laboratory of Energy Thermal Conversion and Control, Ministry of Education, School of Energy and Environment, Southeast University, #2 Sipailou Road, Nanjing, Jiangsu, 210096, People's Republic of China. 101010340@seu.edu.cn" |
| Journal Title: | Environ Sci Pollut Res Int |
| DOI: | 10.1007/s11356-022-21179-w |
| ISSN/ISBN: | 1614-7499 (Electronic) 0944-1344 (Linking) |
| Abstract: | "To elucidate the effect of nitrogen functional groups on the competitive adsorption of toluene and water vapor, a series of N-doped resorcinol-formaldehyde resin-based activated carbons using g-C(3)N(4) as the nitrogen source were prepared, which possessed different N contents (1.29-6.14%). The competitive adsorption characteristics and mechanisms were investigated by characterizations, dynamic adsorption experiments, adsorption isotherms, and density functional theory calculations. Results showed that the normalized toluene adsorption capacity under 50 RH% was consistent with the N content, revealing that nitrogen functional groups can enhance the competitive adsorption for toluene under a humid atmosphere. Adsorption isotherms analysis suggested that nitrogen functional groups can not only accelerate the adsorption of toluene but also improve the hydrophobicity of carbon surface. Competitive adsorption mechanisms were ascribed to pi-pi interactions and electrostatic interactions. Specifically, graphitic-N and pyridinic-N enhance competitive adsorption for toluene through reinforced pi-pi interactions with toluene and weakened electrostatic interactions with water molecule. However, pyrrolic-N improve the competitive adsorption, which is principally attributed to enhanced pi-pi interactions with toluene. Furthermore, it was found that the reusability of activated carbon could be improved by nitrogen functional groups. This study provides theoretical hints to develop volatile organic compound adsorbents in the presence of water vapor" |
| Keywords: | Activated carbon Adsorption Dft Nitrogen functional groups Toluene Water vapor; |
| Notes: | "PubMed-not-MEDLINELi, Jinjin Cheng, Tangying Ma, Xiuwei Hou, Xueyan Wu, Hao Yang, Linjun eng Germany 2022/07/07 Environ Sci Pollut Res Int. 2022 Dec; 29(56):85257-85270. doi: 10.1007/s11356-022-21179-w. Epub 2022 Jul 6" |
