Nitrogen-doped Microporous Carbon Derived from Pyridine-ligand Based Metal-Organic Complexes as High Performance SO2 Adsorption Sorbents

• Published in: ACS applied materials & interfaces 2018-10
• Main Authors: Wang, Ani, Fan, Ruiqing, Pi, Xinxin, Zhou, Yuze, Chen, Guangyu, Chen, Wei, Yang, Yulin
• Format: Article
• Language: English
• ISSN: 1944-8252

Heteroatom-doped porous carbons are emerging as platforms for gas adsorption. Herein, N-doped microporous carbon (NPCs) materials have been synthesized by carbonization of two pyridine-ligand based Metal-Organic Complexes (MOCs) at high temperatures (800, 900, 1000 and 1100 °C). For the NPCs (termed NPC-1-T and NPC-2-T, T represents the carbonization temperature), micropore is dominant, pyridinic-N and other N atom of MOC precursors mostly retained, the N content reaches as high as 16.61 %. They all show high BET surface area and pore volume, in particular, NPC-1-900 exhibits the highest surface areas and pore volumes, up to 1656.2 m2 g-1 and 1.29 cm3 g-1, high content of pyridinic-N (7.3 %), bring out considerable amount of SO2 capture (118.1 mg g-1). Theoretical calculation (int=ultrafine m062x) indicates that pyridinic-N act as the leading active sites contributing to high SO2 adsorption and higher content of pyridinic-N doping into graphite carbon layer structure could change the electrostatic surface potential, as well as the local electronic density, which enhanced SO2 absorption on carbon edge positions. The results show great potential for preparation of microporous carbon materials from pyridine-ligand based Metal-Organic Complexes for effective SO2 adsorption.