Preparation of magnetic sorbent based on exfoliated graphite with different content of cobalt ferrite. (2018)

• Record Type: Journal Article
• Authors: Ivanov, Andrei V.; Pavlova, Julia A.; Kalachev, Igor L.; Maksimova, Natalia V.; Dzhevakov, Pavel B.; Malakho, Artem P.
• Is Part Of: Materials today. Volume 5:Number 12(2018)Part 3
• Page Start: 26010
• Page End: 26017
• Publication Date: 2018
• Subjects: Carbon materials -- Expandable graphite -- Exfoliated graphite -- Cobalt ferrite -- Oil sorbent; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2018.08.021
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: Exfoliated graphite (EG) containing CoFe2 O4 was obtained by impregnation of expandable graphite in mixed solution of FeCl3 and Co(NO3 )2 and subsequent thermal treatment of expandable graphite at 1000 o C in air atmosphere. Expandable graphite based on graphite bisulfate of I and II stages, graphite nitrate of II stage and electrochemical graphite nitrate with different degrees of the graphite matrix oxidation was used. The different preparation conditions lead to different CoFe2 O4 content in EG, which is varied from 7 to 45 wt.%. Obtained EG is characterized by high sorption capacity toward oil (25 g/g) and low water absorption (2 g/g).