A Double cross-linked strategy to construct graphene aerogels with highly efficient methylene blue adsorption performance.

Autor: Jiang L; Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing, 210037, PR China; College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, PR China., Wen Y; College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, PR China., Zhu Z; College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, PR China., Liu X; State Key Laboratory of Natural Medicines, Department of Biotechnology of TCM, China Pharmaceutical University, Nanjing, 210009, PR China. Electronic address: xf.liu@cpu.edu.cn., Shao W; Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing, 210037, PR China; College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, PR China. Electronic address: w.shao@njfu.edu.cn.
Jazyk: angličtina
Zdroj: Chemosphere [Chemosphere] 2021 Feb; Vol. 265, pp. 129169. Date of Electronic Publication: 2020 Dec 02.
DOI: 10.1016/j.chemosphere.2020.129169
Abstrakt: A novel lysine and EDA double cross-linked graphene aerogel (LEGA) was constructed. The prepared LEGA was utilized as a methylene blue (MB) adsorbent in the wastewater treatment. It exhibits a three-dimensional interconnected porous structure benefiting dye adsorption. Its compression property is highly enhanced with the addition of lysine. Adsorption isotherm and kinetics of MB onto LEGA were discussed. Their results show that MB adsorption onto LEGA was fitted to follow Langmuir adsorption isotherm model and the pseudo-second-order kinetic model. LEGA has an excellent adsorption capacity towards MB as high as 332.23 mg/g and its MB adsorption process is proved to be an exothermic process. The mechanism for MB adsorption onto LEGA was proposed as the ion exchange, electrostatic interaction, π-π stacking interaction and hydrogen bonding. Thus, LEGA is confirmed to be a sustainable and green MB adsorbent with highly removal efficiency in the treatment of wastewater.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2020 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: