Abstract
Nitrogen-doped porous carbon nanosheets were synthesizedviaan activation- or post-treatment-free approach, which delivered high CO2and dye adsorption capacities.
Highlights
The nitrogen-doped porous carbon nanosheets (NPCNSs) is able to deliver a high CO2 adsorption capacity with outstanding reversibility, and an unprecedented capacity in methylene blue uptake by 962.1 mg gÀ1, which is among the few highest ever reported for wastewater, with excellent reusability
We report on a facile one-pot approach to synthesize NPCNSs using poly(ionic liquid)s (PILs) as the precursor and carbon nitride (C3N4) nanosheets as sacri cial templates
The carbon prepared from PIL in the absence of C3N4 templates under the same fabrication process was denoted as C-PIL
Summary
Nitrogen-doped porous carbon has received global interest and is still an increasingly expanding topic.[1,2,3,4,5,6,7,8] This is ascribed to its unique, tunable physical and chemical properties at both atomic and macroscopic scales and a wide application scope in the elds of catalysis,[9,10,11,12,13] environmental remediation,[14,15,16,17,18] energy generation and storage,[19,20,21,22,23,24] etc. The third strategy is post-treatment, such as thermal annealing in ammonia vapor[40] or acetonitrile vapor,[41] to dope porous nitrogen-poor carbons with appropriate reactivity This approach suffers from the need for additional vacuum facilities but especially they are very time- and energy-consuming procedures, which limit their application to the elaboration of principles. It is well known that the coexistence of porous structures at various length scales combined with a large speci c surface area will advantageously amplify the unusual bene t of nitrogen doping in carbon by accelerating the mass/energy transport to boost material performance.[53,54,55]. Exploiting new efficient adsorbents with high adsorption capacities is thereby one of the key tasks in water puri cation In this contribution, we report on a facile one-pot approach to synthesize NPCNSs using PILs as the precursor and carbon nitride (C3N4) nanosheets as sacri cial templates. It will be shown that the NPCNSs exhibit a high CO2 adsorption capacity with outstanding reversibility and that they are well-performing adsorbents for organic dyes
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