Premium
Tuning Surface Wettability and Adhesivity of a Nitrogen‐Doped Graphene Foam after Water Vapor Treatment for Efficient Oil Removal
Author(s) -
Zhai Peng,
Jia Huimin,
Zheng Zeyang,
Lee ChihChi,
Su Haijun,
Wei TzuChien,
Feng ShienPing
Publication year - 2015
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201500243
Subject(s) - materials science , wetting , graphene , enhanced oil recovery , chemical engineering , nitrogen , water vapor , doping , graphene foam , composite material , nanotechnology , graphene oxide paper , organic chemistry , optoelectronics , chemistry , engineering
An environment‐friendly water vapor treatment for realizing a highly hydrophobic (contact angle ≈147.5°) and oleophilic N‐doped graphene foam (NGF) for efficiently removing oil from oil/water emulsions is presented. 3D porous networks of NGF with high N content are prepared by subjecting a mixture of graphene oxide and 5 vol% pyrrole to a hydrothermal process; the mixture is then freeze‐dried and annealed under a N 2 atmosphere. The surface wettability and adhesivity are tuned through water vapor treatment by forming a low‐surface‐energy hydrocarbon layer, with no chemical modification. The effectiveness of the hydrophobic/oleophilic NGF in removing oil from an oil/water emulsion is demonstrated.