Abstract
A scalable, one pot hydrothermal synthesis of ZnO nanowire converted commodity filter papers to efficient oil/water separators. The coated filter paper exhibited superhydrophilic and superoleophobic properties in ambient and underwater conditions.
Highlights
Uniform ZnO nanowires (NWs) were grown on cellulose filter paper via a modified one-step hydrothermal method
Recent studies on modulating wettability by chemical modi cation and/or nanoscale texturizing have achieved a remarkable enhancement in separation efficiency of oil/water suspensions.[3,4,5,6,7]
It remains as a challenge to develop cost-effective and scalable material processing pathways without environmentally harmful by-products so that they can be employed in large scale production and use in society
Summary
Uniform ZnO nanowires (NWs) were grown on cellulose filter paper via a modified one-step hydrothermal method. Selective oil/water filter paper via a scalable onepot hydrothermal growth of ZnO nanowires† The ZnO coated filter paper exhibited superhydrophilicity and underwater superoleophobicity due to the surface roughness of the coated ZnO NWs. The coated cellulose filters demonstrated exceptional results at oil/ water separation with high separation efficiency and experimentally proven recyclability for several oil/water mixtures.
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