期刊
CHEMICAL ENGINEERING JOURNAL
卷 386, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2019.123994
关键词
Reduced graphene oxide; Wood sponge; Hydrophobic; Electrothermal capability; Crude oil; Clean-up
资金
- Science and Technology Planning Project of Guangdong Province, China [2018A030313884, 2017B090915002]
- Science and Technology Planning Project of Guangzhou City, China [201804010381]
With the increasing occurrences of industrial oily wastewater emissions and crude oil spills, the deteriorated global environment and ecosystems have attracted a great deal of attention worldwide. Herein we report a highly hydrophobic balsa wood sponge wrapped with fluoroalkyl silane modified reduced graphene oxide (FrGO@WS) for efficient clean-up of all kinds of oils including viscous crude oil from water. The F-rGO@WS possessed excellent water repellency with a water contact angle of 145 degrees. Owing to high hydrophobicity and longitudinal channels, the F-rGO@WS was successfully applied for separating oil-water mixtures, and the separation efficiency reached 99.0%. Furthermore, the F-rGO@WS also possessed quick electrothermal capability and could be utilized as a filter to efficiently separate viscous crude oil from water by means of the generated Joule heat under a low voltage, and the separation rate was about 10 times higher than that without voltage. Our findings stand out a new tool to fabricate functional natural materials and exhibit great potential in practical applications such as water pollution control and clean-up of viscous crude oil.
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