Structural Effect of Ionic Liquid on Long-Term Stability in Poly(ethylene oxide)/Ag Ions/Ag Nanoparticles Composite for Olefin Separation

2019 ◽  
Vol 28 (5) ◽  
pp. 445-449 ◽  
Author(s):  
Hyunsik Jeon ◽  
Younghyun Cho ◽  
Sang Wook Kang
Keyword(s):  
Ionic Liquid ◽  
Ethylene Oxide ◽  
Ag Nanoparticles ◽  
Structural Effect ◽  
Term Stability ◽  
Long Term Stability ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

scholarly journals Poly(ethylene oxide)/Ag ions and nanoparticles/1-hexyl-3-methylimidazolium tetrafluoroborate composite membranes with long-term stability for olefin/paraffin separation

RSC Advances ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 4771-4775 ◽  
Author(s):  
Hyunsik Jeon ◽  
Sang Wook Kang
Keyword(s):  
Ethylene Oxide ◽  
Composite Membrane ◽  
Composite Membranes ◽  
Term Stability ◽  
Long Term Stability ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

A poly(ethylene oxide)(PEO)/AgBF4/1-hexyl-3-methylimidazolium tetrafluoroborate (HMIM+BF4−) composite membrane with long-term stability was prepared for olefin/paraffin separation.

scholarly journals Long-Term Stability Improvement of Non-Toxic Dye-Sensitized Solar Cells via Poly(ethylene oxide) Gel Electrolytes for Future Textile-Based Solar Cells

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3035
Author(s):  
Jan Lukas Storck ◽  
Marius Dotter ◽  
Sonia Adabra ◽  
Michelle Surjawidjaja ◽  
Bennet Brockhagen ◽  
...  
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Term Stability ◽  
Long Term Stability ◽  
Dye Sensitized ◽  
Gel Electrolytes ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Sensitized Solar Cells

To overcome the long-term stability problems of dye-sensitized solar cells (DSSC) due to solvent evaporation and leakage, gelling the electrolyte with polymers is an appropriate option. Especially for future applications of textile-based DSSCs, which require cost-effective and environmentally friendly materials, such an improvement of the electrolyte is necessary. Therefore, the temporal progressions of efficiencies and fill factors of non-toxic glass-based DSSCs resulting from different gel electrolytes with poly(ethylene oxide) (PEO) are investigated over 52 days comparatively. Dimethyl sulfoxide (DMSO) proved to be a suitable non-toxic solvent for the proposed gel electrolyte without ionic liquids. A PEO concentration of 17.4 wt% resulted in an optimal compromise with a relatively high efficiency over the entire period. Lower concentrations resulted in higher efficiencies during the first days but in a poorer long-term stability, whereas a higher PEO concentration resulted in an overall lower efficiency. Solvent remaining in the gel electrolyte during application was found advantageous compared to previous solvent evaporation. In contrast to a commercial liquid electrolyte, the long-term stability regarding the efficiency was improved successfully with a similar fill factor and thus equal quality.

Cluster–Micelle Transition of a Thermo- and Photoresponsive ABC Triblock Copolymer in an Ionic Liquid

2019 ◽  
Vol 72 (2) ◽  
pp. 155
Author(s):  
Aya Saruwatari ◽  
Kei Hashimoto ◽  
Ryota Tamate ◽  
Ryoji Usui ◽  
Hisashi Kokubo ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Transition Temperature ◽  
Ethylene Oxide ◽  
Uv Irradiation ◽  
Low Temperatures ◽  
Triblock Copolymer ◽  
Abc Triblock Copolymer ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Azobenzene Groups

We report the photocontrollable micelle–cluster transition of an ABC-type triblock copolymer in an ionic liquid (IL). Polystyrene-b-poly(ethylene oxide)-b-poly(4-phenylazobenzyl acrylamide-r-N-isopropylacrylamide) (PSt-b-PEO-b-P(AzoBnAm-r-NIPAm)) was synthesised, where PSt is IL-phobic, PEO is IL-philic, and P(AzoBnAm-r-NIPAm) is photo- and thermoresponsive in the IL. At high temperatures, the triblock copolymer forms micelles with PSt cores; furthermore, at low temperatures, micelles self-assemble into clusters induced by the aggregation of P(AzoBnAm-r-NIPAm). Under UV irradiation, the micelles form clusters at lower temperatures than that in the dark because of the change in the solubility of P(AzoBnAm-r-NIPAm) induced by photoisomerisation of the azobenzene groups, indicating that this triblock copolymer has a photocontrollable micelle–cluster transition temperature.

Photochemical conversion of AgCl nanocubes to hybrid AgCl–Ag nanoparticles with high activity and long-term stability towards photocatalytic degradation of organic dyes

2012 ◽  
Vol 90 (10) ◽  
pp. 858-864 ◽  
Author(s):  
Jizhuang Wang ◽  
Changhua An ◽  
Meiyu Zhang ◽  
Chuan Qin ◽  
Xijuan Ming ◽  
...  
Keyword(s):  
Ag Nanoparticles ◽  
Environmental Remediation ◽  
Organic Dyes ◽  
Clean Energy ◽  
Active Species ◽  
Significant Loss ◽  
Term Stability ◽  
Long Term Stability ◽  
Photochemical Conversion

The performance of a photocatalytic reaction is mainly determined by the quality of the photocatalyst. For real applications, significantly enhancing the stability and activity of the photocatalysts still remains a challenge for materials scientists and chemists. In this paper, we have achieved a highly efficient plasmonic AgCl–Ag nanophotocatalyst via photochemical conversion of AgCl nanocubes. Compared with reported photocatalysts, the as-achieved nanophotocatalyst exhibits superior activity, long-term stability, and wide applicability in the decomposition of organic dye pollutants. For example, only 30 s is needed to bleach methyl orange molecules assisted by AgCl–Ag nanoparticles. Furthermore, the catalyst can be reused up to 50 times without significant loss of activity. A possible mechanism was discussed and the specified photocatalytic reactions verified that both O2•– and OH• radicals were the main active species in decomposing pollutants. The excellent performance of the present photocatalyst suggests promising applications in environmental remediation, clean energy creation, and solar cells.

Effect of halides on the solvation of poly(ethylene oxide) in the ionic liquid propylammonium nitrate

2019 ◽  
Vol 534 ◽  
pp. 649-654 ◽  
Author(s):  
Ryan Stefanovic ◽  
Zhengfei Chen ◽  
Paul A. FitzGerald ◽  
Gregory G. Warr ◽  
Rob Atkin ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ethylene Oxide ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene
Sign in / Sign up

Export Citation Format

Share Document