Olefin separation via charge transfer and dipole formation at the silver nanoparticle–tetracyanoquinoid interface

Chae, Il Seok; Kang, Sang Wook; Kang, Yong Soo

doi:10.1039/c4ra03136a

Cited by 14 publications

(16 citation statements)

References 25 publications

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“…TCNQ is well known as a widely employed electron acceptor that enables the transfer of electrons from metals to organic molecules leads to the formation of metal-TCNQ, including AgNPs-TCNQ, complexes. 50 The highest enhancement factors (EFs) for methylphenols isomeric cresols and xylenolswere observed in the case of modification of the SERS-active surface with DDQ (Fig. 5).…”

Section: Environmental Science: Nano Papermentioning

confidence: 96%

Ultrasensitive and multiplex SERS determination of anthropogenic phenols in oil fuel and environmental samples

Eremina

Kapitanova

Ferree

et al. 2022

Environ. Sci.: Nano

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Section: Environmental Science: Nano Papermentioning

confidence: 96%

Ultrasensitive and multiplex SERS determination of anthropogenic phenols in oil fuel and environmental samples

Eremina

Kapitanova

Ferree

et al. 2022

Environ. Sci.: Nano

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“…The membrane selectivity achieved working with 50:50 v/v propylene/propane mixtures was 11 ( Table 3). After this work, others studies have begun to explore new molecules to polarize the surface of the Ag NP, 24,[119][120][121][122] always aiming to improve the selectivity of separation. 123 Therefore, Ag NP with sizes below this value can further improve the transport of the olefinic gases.…”

Section: Silver Nanoparticles As Carriermentioning

confidence: 99%

A Perspective of Solutions for Membrane Instabilities in Olefin/Paraffin Separations: A Review

Campos

Reis

Ortiz

et al. 2018

Ind. Eng. Chem. Res.

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Light olefins are mainly produced by naphtha steam cracking, which is among the more energy intensive processes in the petrochemical industry. To save energy, some alternatives have been proposed to partially replace or combine with cryogenic distillation the conventional technology to separate olefins and paraffins. Within this aim, facilitated transport membranes, mainly with Ag + cations as selective carriers, have received great attention owing to the high selectivity and permeance provided. However, to be used industrially, the undesirable instability associated with the Ag + cation should be considered. Poisonous agents and polymer membrane materials are sources of Ag + deactivation. In recent years, great achievements on the separation performance have been reported, but the current challenge is to maintain the selectivity in long-term separation processes. This work presents a critical analysis of the potential causes of Ag + deactivation and points out some alternatives that have been proposed to overcome the hurdle. This review highlights and critically analyses some perspectives of the ongoing development and application of facilitated transport membranes.

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“…On the other hand, we recently reported the excellent separation performance of poly(vinylpyrrolidone) (PVP)/AgNPs nanocomposite membranes utilizing the interface of the dipole on the surface of AgNPs with 7,7,8,8-tetracyanoquinodimethane (TCNQ), which is a strong electron acceptor. The membranes exhibited unprecedented separation performance: a selectivity of 50 and a permeance of 3.5 GPU 31,32 . This demonstrated that positively charged AgNPs can perform well as an olefin carrier for the separation of olefin and paraffin.…”

Section: Introductionmentioning

confidence: 99%

PEBAX-1657/Ag nanoparticles/7,7,8,8-tetracyanoquinodimethane complex for highly permeable composite membranes with long-term stability

Kim

Kang

2019

Sci Rep

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Poly (ether-block-amide) resin-1657 (PEBAX-1657)/silver nanoparticle (AgNPs)/7,7,8,8-tetracyanoquinodimethane (TCNQ) composite membranes were prepared for olefin/paraffin separation. The long-term performance of composite membranes can be improved by preventing the reduction of silver ions by adding Al(NO3)3 and PEBAX-1657, which has 40% amide groups and 60% ether groups, to the polymer matrix for high permeance. In this study, silver ions were reduced to form nanoparticles to which 7,7,8,8-tetracyanoquinodimethane (TCNQ, electron acceptor) was added to produce long-term olefin carriers. The surface of the AgNPs were modified using electron TCNQ to induce positive charges. The polarized surface of the AgNPs in the PEBAX-1657 permeable polymer matrix interacted with olefins. The membrane was expected to show exceptional separation performance. The results showed that the PEBAX-1657/AgNPs/TCNQ composite membrane exhibited a selectivity of 12.7 and a mixed-gas permeance of 10.2 GPU for durations longer than 76 h. The surface-activated AgNPs were characterized using infrared spectroscopy and X-ray photoelectron spectroscopy.

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Olefin separation via charge transfer and dipole formation at the silver nanoparticle–tetracyanoquinoid interface

Cited by 14 publications

References 25 publications

Ultrasensitive and multiplex SERS determination of anthropogenic phenols in oil fuel and environmental samples

Ultrasensitive and multiplex SERS determination of anthropogenic phenols in oil fuel and environmental samples

A Perspective of Solutions for Membrane Instabilities in Olefin/Paraffin Separations: A Review

PEBAX-1657/Ag nanoparticles/7,7,8,8-tetracyanoquinodimethane complex for highly permeable composite membranes with long-term stability

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