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Synergistic Activation for Synthesis of Sulfur and Oxygen Co–Doped Porous Carbons and Their Application for Dye Adsorption and Supercapacitor
Author(s) -
Li Xiaocong,
Cui Junyan,
Yuan Huiyu,
Zhang Shaowei,
Jia Quanli
Publication year - 2021
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202101311
Subject(s) - heteroatom , supercapacitor , adsorption , capacitance , electrochemistry , carbon fibers , rhodamine b , chemical engineering , sulfur , materials science , porosity , oxygen , specific surface area , electrode , inorganic chemistry , chemistry , organic chemistry , catalysis , composite material , composite number , ring (chemistry) , photocatalysis , engineering , metallurgy
Environmentally friendly activation strategies for synthesis of heteroatom‐doped porous carbons are extremely welcome. Here, K 2 SO 4 and NaCl‐KCl were introduced simultaneously to prepare sulfur/oxygen co‐doped porous carbons (SPC). By adopting phenolic resin (PF) as the carbon source, the optimal SPC sample with a large surface area of 1838 m 2 g −1 and pore volume of 1.18 cm 3 g −1 was successfully prepared. Structure characterizations demonstrated that K 2 SO 4 mainly accounted for the pore formation while NaCl‐KCl had a confinement effect on the carbon loss. Finally, as a multifunctional adsorbent, the maximum capacity for SPC‐1‐2‐5 towards Rhodamine B (RhB) reached 2532.3 mg g −1 , showing a great potential in cleaning water. As an active electrode material for supercapacitor, the specific capacitance for SPC‐1‐2‐5 reached 296.7 F g −1 at the current density of 0.5 A g −1 . And the specific capacitance retained 92.8 % after 10000 cycles at 5 A g −1 , also demonstrating its excellent cycle stability in electrochemistry. This methodology of simultaneous activation and confinement could be extended to obtain new carbon materials for various applications.