Isorefractive high internal phase emulsion organogels for light induced reactions

Zhang, Tao; Guo, Qipeng

doi:10.1039/c6cc00391e

Cited by 21 publications

(19 citation statements)

References 29 publications

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“…8 High internal phase emulsions (HIPEs) is a template method to fabricate porous polymers, dened as PolyHIPEs, with controllable pore structures. [9][10][11] The emulsion consists of an external continuous monomer phase and an internal droplet phase exceeding 74% of the total volume. [12][13][14] Because of their high porosity, large surface area, and interconnected pores, PolyHIPEs have great potential in the eld of separation.…”

Section: Introductionmentioning

confidence: 99%

Emulsion-derived hierarchically porous polystyrene solid foam for oil removal from aqueous environment

et al. 2017

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Herein, a high internal phase emulsion (HIPE) technique to fabricate hierarchically porous monolithic Fe 3 O 4 /polystyrene composite material has been described. A novel co-stabilizer system of Span 20 and Fe 3 O 4 solid particles was adopted to prepare the styrene-based emulsion. By adjusting the surfactant level, the concentration of Fe 3 O 4 particles, and water content, a hierarchically interconnected porous material with a secondary pore structure of nano/micro size was constructed. In addition, the resulting composite polymer material exhibited excellent thermal stability, attributing to the good dispersion of Fe 3 O 4 particles in the polymer matrix and strong bonding between solid particles and polymer chains.Moreover, the oil adsorption capacity of the solid foam was 16 times its own mass even after 10 cycles of oil/water separation. Importantly, the polystyrene solid foam exhibited hydrophobicity and oleophilicity without any further modification. Moreover, the incorporation of Fe 3 O 4 particles allowed the composite material to be conveniently collected under an external magnetic field. All these features together make the polystyrene composite material an ideal adsorbent in the oil/water separation.

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Section: Introductionmentioning

confidence: 99%

Emulsion-derived hierarchically porous polystyrene solid foam for oil removal from aqueous environment

et al. 2017

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“…[104] Phase separation during polymerization and/or crosslinking was observed within HIPEs containing a significant amount of solvent in the external phase, achieving specific surface areas as high as 570 m 2 / g. [93,[105][106] The incorporation of other pore-generating processes within the PH walls includes the generation of highly porous PH walls using gel formation and drying and the generation of foamed PH walls using CO 2 -generating urea reactions. [107][108][109][110][111][112][113] The application of the previously described routes used to generate microporosity and mesoporosity could also be applied within the PH walls to generate monoliths with hierarchical porosities. The potential inherent within designable wall chemistries can be used to exploit emulsion templating even further.…”

Section: Polymer Wall Structure: Behold There Was a Hole In The Wallmentioning

confidence: 99%

The Chemistry of Porous Polymers: The Holey Grail

Silverstein

2020

Israel Journal of Chemistry

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Porous polymers have been evolving continuously since the introduction of foam rubber in 1929. Today, pore diameters ranging from sub‐nanometre to millimetre can be generated controllably. Cutting‐edge porous polymers are now being applied at the forefront of critical problems with societal and environmental impact including advanced systems for biomedicine, water purification, energy storage, and gas purification and storage. The commonly‐used pore generation approaches include macromolecular design, self‐assembly, phase separation, solid and liquid templating, sol‐gel formation, and foaming. In each, The Chemistry of Polymers, both the polymerization chemistry and the macromolecular structural chemistry, must be applied advantageously to generate the empty volume within the polymer and then fix it in place. This essay will traverse the various pore size scales, describing the chemistries involved and discussing their implications.

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“…PC-polyHIPEs were prepared according to the method described in our previous paper [22]. In a word, it was obtained by light inducing polymerization of dopamine in transparent polyHIPEs which was made via polymerization within high internal phase emulsions.…”

Section: Preparation Of Pc-polyhipesmentioning

confidence: 99%

“…Polydopamine coated polyHIPEs (PC-polyHIPEs) are a type of macroporous polymer, which has been confirmed to be an excellent catalyst support and has large 2 Journal of Chemistry attachment to inorganic catalyst particles. It is synthesized by light inducing polymerization of dopamine in transparent polyHIPEs obtained via polymerization within high internal phase emulsions (HIPEs) [19][20][21][22][23]. The transparent substrate and macropores facilitate the adsorption of light, the mass transfer of substances like gases or liquids, and the host-guest interactions [24].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photodecomposition of Methylene Blue in Water with Sr_1−xK_xTiO_3−δ@PC-polyHIPEs under UV and Visible Light

Gao

Zhang

Guo

et al. 2018

Journal of Chemistry

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Photocatalytic method was investigated to remove water pollutant methylene blue (MB) produced in textile, plastic, and dye industries. PC-polyHIPEs were prepared by light-induced polymerization of dopamine in transparent polyHIPEs which were synthesized by polymerization within high internal phase emulsions. Sr 1− K TiO 3− ( = 0-0.5) nanoparticles were incorporated and adhered to PC-polyHIPEs to form Sr 1− K TiO 3− @PC-polyHIPEs for the first time. The catalysts were characterized by XRD, FTIR, TGA, UV-Vis DRS, and SEM and their photocatalytic properties for MB decomposition were measured over UV-Vis spectrometer. The PC-polyHIPEs were of interconnected porous structure with around 100 m pores and 30 m windows. Sr 1−x K x TiO 3− @PC-polyHIPEs showed excellent MB decomposition activity under either UV or visible light although Sr 1−x K x TiO 3− alone worked only under UV light. When = 0.3, Sr 1−x K x TiO 3− @PC-polyHIPEs showed the highest photocatalytic performance due to the existence of more oxygen vacancies. When the water solution with 50 mg L −1 MB and 1.6 g cat. L −1Sr 0.7 K 0.3 TiO 3− @PC-polyHIPEs was exposed to visible light for 160 min at room temperature, 88.3% of MB was decomposed. After being used for eight cycles, 87.6% activity of fresh Sr 0.7 K 0.3 TiO 3− @PC-polyHIPEs still remained. The influences of salinity, temperature, and catalyst concentration on the catalytic activity were studied. For MB decomposition under visible light, the activation energy of Sr 0.7 K 0.3 TiO 3− @PC-polyHIPEs was calculated to be 12.3 kJ mol −1 and the kinetics analysis revealed that the photocatalysis followed the second-order reaction. These findings demonstrated that Sr 1−x K x TiO 3− @PC-polyHIPEs were an effective candidate for real application in decomposition of MB in water.

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Isorefractive high internal phase emulsion organogels for light induced reactions

Cited by 21 publications

References 29 publications

Emulsion-derived hierarchically porous polystyrene solid foam for oil removal from aqueous environment

Emulsion-derived hierarchically porous polystyrene solid foam for oil removal from aqueous environment

The Chemistry of Porous Polymers: The Holey Grail

Enhanced Photodecomposition of Methylene Blue in Water with Sr_1−xK_xTiO_3−δ@PC-polyHIPEs under UV and Visible Light

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Isorefractive high internal phase emulsion organogels for light induced reactions

Cited by 21 publications

References 29 publications

Emulsion-derived hierarchically porous polystyrene solid foam for oil removal from aqueous environment

Emulsion-derived hierarchically porous polystyrene solid foam for oil removal from aqueous environment

The Chemistry of Porous Polymers: The Holey Grail

Enhanced Photodecomposition of Methylene Blue in Water with Sr1−xKxTiO3−δ@PC-polyHIPEs under UV and Visible Light

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Enhanced Photodecomposition of Methylene Blue in Water with Sr_1−xK_xTiO_3−δ@PC-polyHIPEs under UV and Visible Light