Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 297, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.seppur.2022.121420
Keywords
Fe and Na co-doped g-C3N4; Adsorption; Selective adsorption; Adsorption capacity; Rapid adsorption
Categories
Funding
- Na-tional Nature Science Foundations of China [22173078, 21673204]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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In this study, Fe and Na co-doped g-C(3)N(4) was synthesized using one-step calcination. The effect of Na doping on the adsorption of MB and the mixture of MB and RhB was investigated. The results showed that 10-CN exhibited excellent adsorption properties for cationic MB and selective adsorption for MB from the mixture containing MB and MO.
Fe and Na co-doped g-C(3)N(4 )were facilely synthesized by one-step calcination. The effect of Na doping on the adsorption of MB and the mixture of MB and RhB was studied, in which 10-CN showed excellent adsorption properties for cationic MB. Langmuir's model was more suitable for describing the adsorption process. The maximum adsorption capacity reached 1955 mg/g for only 3 min, which was significantly higher than that reported. 10-CN showed selective adsorption for MB from the mixture containing MB and MO. The experimental results indicated that the electrostatic interaction between MB and 10-CN played a key role in the adsorption, and the pi-pi conjugation and the hydrogen bonding between MB and 10-CN were found. Methanol was used as a desorbing agent for MB desorption from 10-CN. 10-CN showed excellent stability for MB adsorption, and the removal efficiency of MB remained above 95% after five cycles.
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