Journal
CHEMOSPHERE
Volume 288, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2021.132490
Keywords
Membrane separation; Oil; water emulsion; Carbon nanotubes; Electroless nickel plating; Catalytic reduction
Categories
Funding
- National Natural ScienceFoundation of China [51908509, 51978628]
- Natural Science Foundation of Zhejiang Province [LD21E080001, LY21E080012]
- Zhejiang Provincial Ten Thousand Talent Program [ZJWR0302055]
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In this study, a dual-functional Ni nanoparticles@Ag/C-carbon nanotubes composite membrane was successfully fabricated, which can simultaneously separate oil/water emulsion and degrade organic pollutants, showing high flux, oil rejection, and antifouling properties. The composite membrane has great potential for treatment of oily wastewater.
It is of great significance to develop novel membranes with dual-function of simultaneously separating oil/water emulsion and degrading the contained water-miscible toxic organic components. To meet this requirement, a dual-functional Ni nanoparticles (NPs)@Ag/C-carbon nanotubes (CNTs) composite membrane was fabricated via electroless nickel plating strategy in this study. The as-prepared composite membrane possessed superhydrophilicity with water contact angle of 0 degrees and splendid underwater oleophobic property with oil contact angle of 142 degrees. When the membrane was applied for separation of surfactant stabilized oil-in-water emulsion, high permeate flux (about 97 L m- 2.h- 1 under gravity), oil rejection (about 98.8%) and antifouling property were achieved. Benefitting from the NiNPs@Ag/C-CNTs layer on membrane surface, the composite membrane exhibited high catalytic degradation activity for water-miscible toxic organic pollutant (4-nitrophenol) with addition of NaBH4 in a flow-through mode. Meanwhile, the NiNPs@Ag/C-CNTs composite membrane possessed excellent durability, which was verified by the good structural integrity even under ultrasonic treatment. The cost-efficiency, high separation and degradation performance of the prepared membrane suggested its great potential for treatment of oily wastewater.
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