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S‐Doped Magnetic Mesoporous Carbon for Efficient Adsorption of Methyl Orange from Aqueous Solution
Author(s) -
Xu Jiangyan,
Zhai Shiman,
Zhu Bo,
Liu Jingxin,
Lu Aimin,
Jiang Hongmei
Publication year - 2021
Publication title -
clean – soil, air, water
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 66
eISSN - 1863-0669
pISSN - 1863-0650
DOI - 10.1002/clen.202000285
Subject(s) - adsorption , endothermic process , mesoporous material , methyl orange , aqueous solution , freundlich equation , materials science , chemical engineering , langmuir adsorption model , langmuir , carbon fibers , inorganic chemistry , chemistry , organic chemistry , composite number , catalysis , composite material , photocatalysis , engineering
A simple and rapid soft‐templating coupled with one‐pot solvent thermal method is developed to synthesize S‐doped magnetic mesoporous carbon (S‐doped MMC). In this method, phenolic resin is used as a carbon precursor and Pluronic copolymer P123 is used as a template and 2,5‐dimercapto‐1,3,4‐thiadiazole is used as sulfur source. Prepared S‐doped MMC processes a high specific surface area, the Fe 3 O 4 particles are well embedded in the mesoporous carbon walls that exhibit a strong magnetic response, and the hydrated iron nitrate loading amount of 0.808 g is the best. Batch adsorption experiments are carried out at different pH, initial concentration, temperature, and contact time on the adsorption of methyl orange (MO) by S‐doped MMC. The kinetic data of the adsorption process are better fitted with pseudo‐second‐order model than the pseudo‐first‐order model. Langmuir model is more suitable for the equilibrium data than Freundlich model. The thermodynamic parameters including Δ G 0 , Δ H 0 , and Δ S 0 indicate that the adsorption is a feasible, spontaneous, and endothermic process. Finally, it is found that the coexistence of PO 4 3− , NO 3 − , SO 4 2− , Cl − , and CO 3 2− does not influence the adsorption process. These results illustrate S‐doped MMC can be an efficient adsorbent for the removal of MO from wastewater.