Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 380, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2019.120865
Keywords
HNTs; Special wettability; Emulsion separation; Dye adsorption
Categories
Funding
- National Natural Science Foundation of China [51774245]
- Applied Basic Research Program of Science and Technology Department of Sichuan Province [2018JY0517]
- Youth science and technology creative group fund of Southwest Petroleum University [2015CXTD03]
- Sichuan Province sci-tech Supported project [2015RZ0023]
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Water-purification membranes with high water flux, excellent recycling ability, good anti-fouling property, wide range for different oil/water emulsions separation, and strong water-soluble dyes removal ability are highly desirable for water purification but still a challenge to be realized. In this work, we show a simple method to address this challenge, in which halloysite nanotubes (HNTs) have been decorated on the poly (vinylidene fluoride) (PVDF) membrane surface through one-pot method via the aid of KH550 and dopamine. The HNTs@PVDF composite membrane exhibits superhydrophilic and under-water superoleophobic performance. In addition, our membrane can separate wide oil/water emulsions (including surfactant-stabilized and surfactant-free emulsions) from wastewater with high efficiency ( > 99.65%), outstanding recycle ability with good flux recovery rate (FRR > 95%) and good anti-fouling performance (the underwater oil contact angle (OCA) is 155.8 +/- 1.8 degrees with low oil adhesion) and high water flux (7994 +/- 150 L m(-2)h(-1)). Interestingly, our membrane also removes different water-soluble dyes (e.g., Congo red, methylene blue, and rhodamine B) from waste water by simply filtering. Those outstanding properties make our membrane hold great potential applications in real-world water purification and environmental protection.
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