Hierarchically Structured Graphene Coupled Microporous Organic Polymers for Superior CO2 Capture

Fa-Qian Liu; Li-Li Wang; Guo-Hua Li; Wei Li; Chao-Qin Li

doi:10.1021/acsami.7b11492

Hierarchically Structured Graphene Coupled Microporous Organic Polymers for Superior CO₂ Capture

ACS Appl Mater Interfaces. 2017 Oct 4;9(39):33997-34004. doi: 10.1021/acsami.7b11492. Epub 2017 Sep 22.

Authors

Fa-Qian Liu¹, Li-Li Wang¹, Guo-Hua Li¹, Wei Li¹, Chao-Qin Li¹

Affiliation

¹ Engineering Research Center of High Performance Polymer and Molding Technology, Ministry of Education, and ‡College of Automation and Electronic Engineering, Qingdao University of Science and Technology , Qingdao 266042, China.

PMID: 28905620
DOI: 10.1021/acsami.7b11492

Abstract

Hierarchically porous materials containing interconnected macro-/meso-/micropores are promising candidates for energy storage, catalysis, and gas separation. Here, we present an effective approach for synthesizing three-dimensional (3D) sulfonated graphene coupled microporous organic polymers (SG-MOPs). The resulting SG-MOPs possess uniform macropores with an average size of ca. 350 nm, abundant mesopores, and micropores with an average size of ca. 0.6 nm. The SG-supported adsorbents exhibit a high nitrogen content (more than 38.1 wt %), high adsorption capacity (up to 3.37 mmol CO₂ g^-1), high CO₂/N₂ selectivity from 42 to 51, moderate heat of adsorption, as well as good stability because of the hierarchical porous structure and excellent thermal conductivity of the SG scaffold. Thus, these nitrogen-enriched adsorbents allow the overall CO₂ capture process to be promising and sustainable.

Keywords: 3D graphene; CO2 capture; MOPs; Schiff-base chemistry; hierarchical structure.