3-D magnetic graphene balls as sorbents for cleaning oil spills. (11th October 2019)

• Record Type: Journal Article
• Authors: Tao, Tao; Li, Guangyao; He, Yanli; Yang, Xiufang
• Is Part Of: Nanomaterials and nanotechnology. Volume: 9(2019)
• Publication Date: 2019-10-11
• Subjects: Magnetic graphene balls -- graphene nanoplatelets -- hydrothermal carbonization -- cellulose -- catalytic graphitization -- oil removal; Nanostructured materials -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials; Nanotechnology; Periodicals; 620.5
• DOI: 10.1177/1847980419857373
• Languages: English
• ISSNs: 1847-9804

Abstract

A 3-D magnetic graphene ball (MGB) material was prepared using cellulose as the carbon source. Carbon-encapsulated iron nanoparticles (CEINs) were first prepared by hydrothermal carbonization of cellulose powder at 180°C. Then, the prepared CEINs were catalytically graphitized to graphene-encapsulated iron nanoparticles (GEINs) at 900°C. Finally, GEINs were treated in carbon dioxide at 700°C, during which the iron core was oxidized to magnetite (Fe3 O4 ) nanoparticles, and graphene shells were peeled off from the iron cores to form graphene nanoplatelets. The graphene nanoplatelets consist of 1–10 layers graphene with the in-plane size of 20–30 nm. The prepared 3-D MGB was investigated for the removal of oil from water, which demonstrated outstanding adsorption performance and excellent recyclability.