Alkali Lignin Green-Reduced Graphene Oxide/Glass Fibercomposite Membrane for Highly Efficient Oil-in-Water Emulsions Separation in Harsh Environment
The high toxicity and complex fabrication process of reduced graphene oxide (RGO) membranes limit their wide application in water treatment. Herein, we reported a new route to fabricate a green RGO composite membrane. Graphene oxide (GO) nanosheets were reduced by alkali lignin (AL), cross-linked with polydopamine (PDA) to stabilize RGO nanosheets, and finally assembled onto a glass fiber (GF) membrane by a vacuum filtration process , resulting in a high flux and robust AL/RGO@PDA membrane for oil/water emulsion separation. It was found that lignin also played a critical role in intercalating nanoparticles and increased the water flux of the resulting composite membranes to 2520 L/m 2 h, which was 3.1 times higher than the GO/GF composite membrane. Even after 10 cycles , the resulting composite membrane remained high separation efficiency (above 99.10 %). In addition, such membranes maintained the original performance at high temperatures (98 °C) and in highly corrosive environments. Overall, this study provides a facile and eco-friendly technique to fabricate green and robust RGO membrane, showing promising application for water purification and separation
Year of publication: |
[2022]
|
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Authors: | Xie, Wei ; Chen, Mao ; Wei, Shuxia ; Zhang, Jiubing ; Li, Zhili |
Publisher: |
[S.l.] : SSRN |
Saved in:
freely available
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