title: An environmentally friendly method for the fabrication of reduced graphene oxide foam with a super oil absorption capacity.
abstract: Three kinds of graphene oxide (GO) foams were fabricated using different freezing methods (unidirectional freezing drying (UDF), non-directional freezing drying, and air freezing drying), and the corresponding reduced graphene oxide (RGO) foams were prepared by their thermal reduction of those GO foams. These RGO foams were characterized by Fourier transform infrared spectroscopy, thermal gravimetric analysis, X-ray diffraction, X-ray photoelectron spectroscopy, and scanning electron microscopy. The absorption process and the factors that influence the absorption capacity were investigated. The RGO foams are hydrophobic and showed extremely high absorbing abilities for organic liquids. The absorption capacity of the RGO foams made by UDF was higher than 100 g g(-1) for all the oils tested (gasoline, diesel oil, pump oil, lubricating oil and olive oil) and had the highest value of about 122 g g(-1) for olive oil. The oil absorption capacity of the GO foams was lower than that of the RGO foams, but for olive oil, the absorption capacity was still high than 70 g g(-1), which is higher than that of most oil absorbents.
authors.affiliation: Department of Applied Chemistry, Yuncheng University, Shanxi 044000, China. heyongqiang@126.com
authors.forename: Yongqiang
authors.initials: Y
authors.lastname: He
authors.forename: Yue
authors.initials: Y
authors.lastname: Liu
authors.forename: Tao
authors.initials: T
authors.lastname: Wu
authors.forename: Junkui
authors.initials: J
authors.lastname: Ma
authors.forename: Xingrui
authors.initials: X
authors.lastname: Wang
authors.forename: Qiaojuan
authors.initials: Q
authors.lastname: Gong
authors.forename: Weina
authors.initials: W
authors.lastname: Kong
authors.forename: Fubao
authors.initials: F
authors.lastname: Xing
authors.forename: Yu
authors.initials: Y
authors.lastname: Liu
authors.forename: Jianping
authors.initials: J
authors.lastname: Gao
mesh_terms: D000042:Absorption; D000059:Accidents; D003247:Conservation of Natural Resources; D052918:Environmental Restoration and Remediation / Q000379:methods*; D005612:Freeze Drying; D005742:Gasoline; D006108:Graphite / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D007219:Industrial Oils; D009821:Oils / Q000737:chemistry*; D000069463:Olive Oil; D010087:Oxides / Q000737:chemistry*; D059392:Petroleum Pollution / Q000032:analysis*; D056951:Photoelectron Spectroscopy; D010938:Plant Oils; D012997:Solvents / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D013818:Thermogravimetry; D014867:Water / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry; D014961:X-Ray Diffraction
chemical_list: D005742:Gasoline; D009821:Oils; D000069463:Olive Oil; D010087:Oxides; D010938:Plant Oils; D012997:Solvents; D014874:Water Pollutants, Chemical; D014867:Water; D006108:Graphite
keywords: Absorption; Foam; Organic liquid; Reduced graphene oxide