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WO3/TiO2 superhydrophilic and underwater superoleophobic membrane for effective separation of oil-in-water emulsions.
- Source :
-
Thin Solid Films . Nov2018, Vol. 665, p9-16. 8p. - Publication Year :
- 2018
-
Abstract
- Abstract Tungsten trioxide (WO 3) and titanium dioxide (TiO 2) decorated commercial stainless steel meshes (SSM 304) were fabricated by chemical deposition and dip coating. WO 3 and TiO 2 particles were firmly and uniformly coated on the membrane surfaces, forming rough micro-nano double structures with underwater superoleophobicity, large contact angles and low oil-adhesion characteristic. Furthermore, the as-prepared membranes achieved effective oil-in-water (O/W) emulsions separation with high efficiency up to 98.5% or more. The separation of O/W emulsions was easily implemented under gravity with water fluxes of >200 L m−2 h−1 or low pressure with water fluxes up to 1300 L m−2 h−1 or more. In addition, the superhydrophilic membranes with WO 3 /TiO 2 coatings were demonstrated for high oil rejection, stable underwater superoleophobic properties after abrasion treatment and steady water permeation flux after several cycles. Highlights • A Method to prepare WO 3 /TiO 2 decorated steel meshes is proposed. • Membranes have a solid structure, good stability and underwater superoleophobicity. • Effectively membrane separation of stabilized oil-in-water emulsions. • Composite membranes have outstanding recyclability and potential for oil/water separation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00406090
- Volume :
- 665
- Database :
- Academic Search Index
- Journal :
- Thin Solid Films
- Publication Type :
- Academic Journal
- Accession number :
- 132425630
- Full Text :
- https://doi.org/10.1016/j.tsf.2018.08.039