Recyclable magnetic superhydrophobic straw soot sponge for highly efficient oil/water separation
TL;DR: Results indicated that this matter can promote interfacial interactions between the sponge surface and oil and has the 30 times recyclability and the advantage of magnetic separation.
About: This article is published in Journal of Colloid and Interface Science.The article was published on 2017-07-01 and is currently open access. It has received 163 citations till now. The article focuses on the topics: Contact angle & Magnetic nanoparticles.
Citations
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TL;DR: In this article, the authors study the efficiency of thermal annealing of nanostructures for phase transformations of the FeCo-Fe2CoO4/Co3O4-spinel type, as well as the subsequent application of the obtained nanotubes as a basis for anode materials of lithium-ion batteries.
Abstract: This article is devoted to the study of the efficiency of thermal annealing of nanostructures for phase transformations of the FeCo – Fe2CoO4/Co3O4-spinel type, as well as the subsequent application of the obtained nanotubes as a basis for anode materials of lithium-ion batteries. The choice of these types of nanotubes for use as a basis for anode materials is due to their structure, as well as the great potential of using spinel structures in this area, interest in which is manifested due to the possibility of accelerating lithiation processes and long-term preservation of the specific capacity of batteries. During the study, it was found that for spinel structures, the formation of oxide growths on the surface of nanotubes, the presence of which is associated with oxidative processes during annealing, is observed. Testing the applicability of these structures as anode materials showed that the formation of oxide spinel structures of type Fe2CoO4/Co3O4 leads to an increase in the number of cycles by 1.5–1.7 times compared to the original nanotubes. The efficiency of increasing the lifetime of anode materials is due to an increase in resistance to degradation of Fe2CoO4/Co3O4 structures, due to the formation of oxide phases, leading to an acceleration of lithation processes.
173 citations
TL;DR: In this article, a facile organic solvent-free method is described to prepare a porous polyvinylidene fluoride (PVDF)-MWCNT foam using table salt as a sacrificial template.
Abstract: Many advanced materials are designed for separation of immiscible oils/organic solvents and aqueous solutions, including poly(vinylidene fluoride) (PVDF)-based materials with superwettability. However, due to the limited solubility of PVDF, techniques (e.g., phase inversion and electrospinning) often involve the use of toxic organic solvents. Here a facile organic solvent-free method is described to prepare a porous PVDF–MWCNT (multiwalled carbon nanotube) foam using table salt as a sacrificial template. The porous PVDF–MWCNT foam is characterized as superhydrophobic–superoleophilic with good elasticity due to its 3D porosity and low surface energy. The foam exhibits high adsorption capacity to a variety of oils/organic solvents and can be easily reused by squeezing, heating, or releasing in other solvents. Moreover, the foam is highly resistant toward UV exposure, corrosive aqueous solutions such as acidic, alkaline, salty solutions, and turbulent environments, and shows effective oils/organic solvents removal in these complex environments. The continuous separation of immiscible oils/organic solvents and corrosive aqueous solutions with vacuum assistance is also presented. The organic solvent-free and reusable PVDF–MWCNT foam is a promising candidate for large-scale industrial separation of oils/organic solvents and water in corrosive and turbulent conditions.
153 citations
TL;DR: In this article, a magnetic superhydrophobic polyurethane sponge by connecting graphene oxide was coated with functionalized oleic acid Fe3O4 nanoparticles on the three-dimensional microstructure of commercial PU sponge via simple and low-cost dip coating method.
97 citations
TL;DR: Wang et al. as mentioned in this paper used a functionalized melamine sponge to selectively absorb various oils from oil/water mixtures, which absorption capacity ranges from 60 to 112 times its own mass.
82 citations
TL;DR: A number of suggestions on how to achieve the systematization of data on the most relevant physico-chemical parameters, which govern and control the interaction between carrier and drug, are offered to give the reader an overview of the most significant advances in this field.
82 citations
References
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TL;DR: An easily fabricated, transparent, and oil-rebounding superamphiphobic coating is designed, based on low-energy surfaces and roughness on the nano- and micrometer scales.
Abstract: Coating is an essential step in adjusting the surface properties of materials. Superhydrophobic coatings with contact angles greater than 150° and roll-off angles below 10° for water have been developed, based on low-energy surfaces and roughness on the nano- and micrometer scales. However, these surfaces are still wetted by organic liquids such as surfactant-based solutions, alcohols, or alkanes. Coatings that are simultaneously superhydrophobic and superoleophobic are rare. We designed an easily fabricated, transparent, and oil-rebounding superamphiphobic coating. A porous deposit of candle soot was coated with a 25-nanometer-thick silica shell. The black coating became transparent after calcination at 600°C. After silanization, the coating was superamphiphobic and remained so even after its top layer was damaged by sand impingement.
1,710 citations
"Recyclable magnetic superhydrophobi..." refers background in this paper
...The particle size of soot grains is often small in the nanometer range, classifying them as nanoparticles and make roughness at the nanoscale level on the substrates [22,23]....
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1,586 citations
"Recyclable magnetic superhydrophobi..." refers background in this paper
...The particle size of soot grains is often small in the nanometer range, classifying them as nanoparticles and make roughness at the nanoscale level on the substrates [22,23]....
[...]
1,333 citations
TL;DR: The method presented here is proved to be versatile to induce macroscopic assembly of reduced graphene sheets with other functional metal oxides and thus to access a variety of graphene-based multifunctional nanocomposites in the form of macroscopy hydrogels or aerogels.
Abstract: We report a one-step fabrication of macroscopic multifunctional graphene-based hydrogels with robust interconnected networks under the synergistic effects of the reduction of graphene oxide sheets by ferrous ions and in situ simultaneous deposition of nanoparticles on graphene sheets. The functional components, such as α-FeOOH nanorods and magnetic Fe3O4 nanoparticles, can be easily incorporated with graphene sheets to assemble macroscopic graphene monoliths just by control of pH value under mild conditions. Such functional graphene-based hydrogels exhibit excellent capability for removal of pollutants and, thus, could be used as promising adsorbents for water purification. The method presented here is proved to be versatile to induce macroscopic assembly of reduced graphene sheets with other functional metal oxides and thus to access a variety of graphene-based multifunctional nanocomposites in the form of macroscopic hydrogels or aerogels.
1,029 citations
"Recyclable magnetic superhydrophobi..." refers background in this paper
...Recently, sea water pollution resulting from oil leakage and industrial waste organic pollutants has emerged as a critical problem imposing threat to the human and animal health [1,2]....
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TL;DR: Coconut husk-based activated carbon was shown to be a promising adsorbent for removal of methylene blue from aqueous solutions and was found to follow closely the pseudo-second-order kinetic model.
995 citations