Synthesis of porous carbon with low oxygen content from fulvic acid for high voltage organic supercapacitors

Chang, Panpan; Li, Xuguang; Li, Linze; Wang, Jirui; Dong, Jinshi; Yang, Ting; Duan, Jingying

doi:10.1016/j.cej.2023.146732

Cited by 13 publications

(1 citation statement)

References 37 publications

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“…The N 1s spectrum of NSPC-800-4 is deconvoluted into three peaks, namely, pyridine N (398.6 eV), pyrrole N (400.6 eV), and graphite N (402.8 eV). The abundance of N species produced in the material after doping with S atoms is mainly due to the fact that the S-containing groups undergo the following reactions in an NH 3 atmosphere C n − normalS + normalN normalH 3 → H 2 normalS + C n − normalN C n − SO x + normalN normalH 3 → H 2 normalS + C n + normalN normalO x …”

Section: Resultsmentioning

confidence: 99%

N/S Dually Doped Nanoporous Carbon for CO₂ Adsorption

Chen,

Bao,

Siqin

2024

ACS Appl. Nano Mater.

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In this study, we prepared N/S-codoped porous carbon materials via a one-step doping method using lignin as the carbon source, thiourea as the N and S source, and KOH as the activator. The synthesized material exhibited a rich N content and a certain S content. The important reason the CO 2 adsorption characteristic of the carbon materials were investigated by modulating the thiourea proportion and doping temperature.Results indicate that at a thiourea ratio of 1:4 and a doping temperature of 700 °C, the material exhibited an outstanding CO 2 adsorption capacity of 3.49 mmol/g. Various characterizations revealed that such a high adsorption capacity is attributed to the combination of a microporous structure and excellent surface chemical properties. The doping of S atoms resulted in the formation of effective active sites, increased the defect density of the material, and promoted the generation of N functional groups, thereby enhancing the efficiency of CO 2 adsorption. In addition, the material exhibits high CO 2 /N 2 selectivity and cycling stability. The overall results indicate that lignin-derived N/S-codoped porous carbon can serve as a potential adsorbent for CO 2 capture.

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