Nitrogen-Doped Porous Carbon Materials Derived from Graphene Oxide/Melamine Resin Composites for CO2 Adsorption

Abstract

CO2 adsorption in porous carbon materials has attracted great interests for alleviating emission of post-combustion CO2. In this work, a novel nitrogen-doped porous carbon material was fabricated by carbonizing the precursor of melamine-resorcinol-formaldehyde resin/graphene oxide (MR/GO) composites with KOH as the activation agent. Detailed characterization results revealed that the fabricated MR(0.25)/GO-500 porous carbon (0.25 represented the amount of GO added in wt.% and 500 denoted activation temperature in °C) had well-defined pore size distribution, high specific surface area (1264 m2·g−1) and high nitrogen content (6.92 wt.%), which was mainly composed of the pyridinic-N and pyrrolic-N species. Batch adsorption experiments demonstrated that the fabricated MR(0.25)/GO-500 porous carbon delivered excellent CO2 adsorption ability of 5.21 mmol·g−1 at 298.15 K and 500 kPa, and such porous carbon also exhibited fast adsorption kinetics, high selectivity of CO2/N2 and good recyclability. With the inherent microstructure features of high surface area and abundant N adsorption sites species, the MR/GO-derived porous carbon materials offer a potentially promising adsorbent for practical CO2 capture.

Micromeso Hierarchical Porous Ultrathin Nitrogen-Doped Carbon Nanosheets with Rough Surfaces for Efficient Gas Adsorption and Separation

“…The XPS spectrum of N 1s could be fitted as pyridinic-N, pyrrole-N, and quaternary-N at 398.3, 399.8, and 401.3 eV, respectively (Figure 3f). 10,22,27 The signal peak intensity was highly correlated to the carbonization temperature and the stability of N types. With the increase in carbonization temperature, the contents of pyridine-N and pyrrolic-N decreased, while that of the quaternary-N increased (Table S2).…”

Review on Recent Applications of Nitrogen‐Doped Carbon Materials in CO2 Capture and Energy Conversion and Storage

“…Despite the binary co-doping technique, the results did not improve significantly compared to the studies mentioned previously. [3,36] This implies that the type of porous carbon used is one of the key factors to consider as some are more effective than others, as opposed to the level of doping and number of heteroatom dopants. It would be worthwhile to determine the effects of co-doping for activated carbons that previously delivered the best CO 2 adsorption abilities, including those obtained from graphene oxide and hydrochar precursors.…”

“…[39,40] Over the recent decades, researchers have investigated N-doped carbon-based materials for energy conversion and storage applications. [36] Copyright 2021, the Authors. Published by MDPI.…”

“…Figure 4. a) Amount of CO 2 adsorbed by MR/GO material at RT and 5 bar in 5 cycles. Reproduced under the terms of the Creative Commons CC BY license [36]. Copyright 2021, the Authors.…”

Decoding Carbon-Based Materials’ Properties for High CO2 Capture and Selectivity

“…In another study, Yuan and co-workers reported nitrogen-doped porous carbon employing melamine-resorcinol-formaldehyde resin and graphene oxide. This material had shown a CO 2 adsorption capacity of 5.21 mmol/g at 298 K at 5 bar pressure . In other attempts, graphene-like morphology/graphene-based nanomaterials were also synthesized and explored for CO 2 adsorption. − For example, graphene-like multiscale microporous carbon nanosheets were synthesized by Shi et al, which provided a CO 2 adsorption capacity of 6.32 mmol/g at 273 K/1 bar .…”