Poly(Ionic Liquid)‐Derived Carbon with Site‐Specific N‐Doping and Biphasic Heterojunction for Enhanced CO₂ Capture and Sensing

Abstract

CO 2 capture is apressing global environmental issue that drives scientists to develop creative strategies for tackling this challenge.T he concept in this contribution is to produce site-specific nitrogen doping in microporous carbon fibers. Following this approach ac arbon/carbon heterojunction is created by using ap oly(ionic liquid) (PIL) as a" soft" activation agent that deposits nitrogen species exclusively on the surface of commercial microporous carbon fibers.T his type of carbon-based biphasic heterojunction amplifies the interaction between carbon fiber and CO 2 molecule for unusually high CO 2 uptake and resistive sensing.

Agar‐Derived Nitrogen‐Doped Porous Carbon for CO2 Adsorption

“…The Q st value is an important measure of the interaction strength between the CO 2 molecule and the carbon surface. The initial Q st at low CO 2 coverage is in the range of 24.0‐30.4 kJ mol −1 , comparable to the reported results of nitrogen doped carbons ,. Agar‐0.75‐600‐1 has the highest value of 30.4 kJ mol −1 , which might be an interplay between the nitrogen content and pore size: although more pores larger than 1 nm are formed, but more nitrogen is doped into the carbon with more urea addition.…”

Constructing Hierarchically Porous N-Doped Carbons Derived from Poly(ionic liquids) with the Multifunctional Fe-Based Template for CO2 Adsorption

“…Elemental analyses were performed to access the element compositions of the carbon materials in this work, especially N content, which was beneficial to CO 2 capture. 47 − 49 As shown in Table 1 , a common tendency of the decreasing N content from 16.84 to 1.87 wt % with the increasing pyrolysis temperature for carbon samples NDPC-1- y was observed. Among them, the N content of NDPC-1-800 was much lower than that of NDC-800, mainly due to the utilization of hydrochloric acid when removing templates.…”

Controlling pore size and pore functionality in sp2-conjugated microporous materials by precursor chemistry and salt templating

“…S14 †) increases, which also has been shown in previous studies. 27,50 NOC-Xs, which have larger pores in comparison to NOC-X-Y, however, have overall a lower water uptake than NOC-X-Y, indicating a higher affinity to water for materials with smaller pores due to similar reasons as discussed above for carbon dioxide. NOC-X samples with larger pores have a notable but less pronounced relationship between water adsorption capacity and heteroatom content.…”