Charged cyclodextrin membranes for precise molecular sieving

Zhang, Qiang; Wang, Yan; Yang, Tao; Bao, Chunyang; Xu, Xiumei; Peng, Bin; Zhang, Jingyu; Luo, Xinzhao; Wang, Bingyu; Luo, Cheng; Wang, Yijun; Wang, Kesai

doi:10.1039/d2ta05880d

Cited by 19 publications

(3 citation statements)

References 39 publications

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“…Such interaction can help reduce the defects caused by uncoordinated Pb, and PFNBr can also passivate halide vacancies, thereby effectively reducing the defects in the perovskite film and at the 2PACz-perovskite interface. [27][28][29] The interaction between PFNBr and perovskite could also contribute in anchoring the perovskite during film formation, which would inhibit water invasion from ambient and affect the crystallization of perovskite. The X-ray diffraction (XRD) patterns of the perovskite films on 2PACz and 2PACz/PFNBr are given in Figure 2b.…”

Section: Resultsmentioning

confidence: 99%

Reducing Nonradiative Losses of Air‐Processed Perovskite Films via Interface Modification for Bright and Efficient Light Emitting Diodes

Li,

Tong

et al. 2023

Adv Funct Materials

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Developing ambient‐air fabrication strategy is desirable for lowering down the fabrication cost of perovskite light emitting diodes (LEDs) and further promoting their broad applications. However, ambient humidity usually leads to undesirable interface and perovskite film quality, causing severe nonradiative losses and unsatisfactory device performance. In this work, an effective strategy to solve this problem and remarkably enhance the performance of perovskite LEDs is reported. The study reveals that the humidity‐induced aggregation of self‐assembled monolayer (SAM) in humid air can be eliminated by introducing a poly[(9,9‐bis(3′‐((N,N‐dimethyl)‐N‐ethylammonium)‐ propyl)‐2,7‐fluorene)‐alt‐2,7‐(9,9‐dioctylfluorene)] dibromide (PFNBr) as an interface modifier, which reduces the interfacial defects and improves the perovskite crystallinity. The interaction between PFNBr and perovskite can further passivate the defects and suppress trap‐assisted nonradiative processes, which significantly enhances the photoluminescence efficiency of the ambient‐processed perovskite films. Furthermore, the energy level alignment is optimized and the hole injection is improved, thus resulting in more efficient and balanced charge injection. As a result, the green perovskite LEDs achieve a high external quantum efficiency of 12.06% and luminance of 22121 cd m−2, representing the record values for the perovskite LEDs processed under such ambient‐air condition, in accompany with an improved device stability.

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Section: Resultsmentioning

confidence: 99%

Reducing Nonradiative Losses of Air‐Processed Perovskite Films via Interface Modification for Bright and Efficient Light Emitting Diodes

Li,

Tong

et al. 2023

Adv Funct Materials

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“…21 In addition, amino β-CD has been extensively applied in polyamide (PA) thin-film composite (TFC) membranes. 22 Li and co-workers constructed a polyamide (MEDβCD/PA) membrane by a mono-(6-ethanediamine-6-deoxy)-β-CD monomer and TMC via the IP process, which could effectively separate CO 2 . 23 Unfortunately, it is inevitable for the PA-TFC membrane to be fouled and chlorine-intolerant, which would severely affect its separation degree and reusability in the practical application.…”

Section: Introductionmentioning

confidence: 99%

“…To promote the reactivity of β-CD molecules, amino functionalization of β-CD is a common modification method . In addition, amino β-CD has been extensively applied in polyamide (PA) thin-film composite (TFC) membranes . Li and co-workers constructed a polyamide (MEDβCD/PA) membrane by a mono-(6-ethanediamine-6-deoxy)-β-CD monomer and TMC via the IP process, which could effectively separate CO 2 .…”

Section: Introductionmentioning

confidence: 99%

Interfacial Polymerization of Highly Active Thiolated Cyclodextrin for the Fabrication of a Loose Nanofiltration Membrane with a Chlorine-Resistant Poly(thioester) Linkage

Fan,

Wang,

Wen

et al. 2023

ACS Appl. Mater. Interfaces

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Cyclodextrins have been frequently used to fabricate membranes via interfacial polymerization (IP). However, the relatively low reactivity of pristine cyclodextrins often induces a lower cross-linking density and unsatisfactory separation performance. In this work, to introduce a highly active thiolated β-cyclodextrin (CD-SH) monomer into IP progress, we constructed a dense and porous poly(thioester) linkage on a commercial membrane surface with loose nanofiltration by IP of CD-SH and trimesoyl trichloride (TMC) as the monomer in an aqueous phase and organic phase separately for the first time. Furthermore, the reactivity of CD-SH has been fully demonstrated by the two-phase IP aiming at unmodified β-CD, a CD-SH/TMC freestanding membrane with a thicker interfacial layer and a smoother surface, and a PAN/CD-SH membrane with a narrow porous distribution. The composite membrane possessed superior separation performance for a high rejection (83.1−99.6%) of different anionic dyes and a low rejection (<20%) of salts, as well as a high-efficiency sieving ability of dye/dye and dye/salt mixtures. The membrane with a poly(thioester) selective layer could steadily operate in a long-term filtration test and exhibit great stability, chloride-resistance performance, and recyclability.

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Electrochemically Mediated Lithium Extraction for Energy and Environmental Sustainability

Zeng,

Li,

Wan

et al. 2024

Adv Funct Materials

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The demand for lithium resources is growing rapidly due to the continuous development of the lithium‐ion battery, which plays an important part in the renewable energy industry. Global sources of lithium are ores and brine, of which 59% are distributed in saline brine. However, the significant lithium resources in saline brine have not been fully utilized. The electrochemical deintercalation method (EDM) for lithium extraction from saline brine is a promising technique because of its environmental friendliness, high selectivity, and cost‐effectiveness. Nevertheless, the application of EDM is greatly limited by the easy dissolution of electrode materials like LiMn2O4 and the cost of mass production. Also, there are a few existing review articles on the EDM for lithium extraction. To address this gap, this review provides a comprehensive overview of the current methods for lithium extraction from saline brine, systematically summarizes the technical status of the EDM, and pays special attention to the preparation method and modification of electrode materials. This review gives new insight into the mechanism of EDM and provides a new design strategy for the evaluation methods of EDM.

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Charged cyclodextrin membranes for precise molecular sieving

Abstract: Precise separation of complex mixtures is of great significance. Membrane technology is attractive for advanced molecular separation due to its energy efficiency and environmental friendliness. Herein, charged membranes with β-cyclodextrin...

Cited by 19 publications

References 39 publications

Reducing Nonradiative Losses of Air‐Processed Perovskite Films via Interface Modification for Bright and Efficient Light Emitting Diodes

Reducing Nonradiative Losses of Air‐Processed Perovskite Films via Interface Modification for Bright and Efficient Light Emitting Diodes

Interfacial Polymerization of Highly Active Thiolated Cyclodextrin for the Fabrication of a Loose Nanofiltration Membrane with a Chlorine-Resistant Poly(thioester) Linkage

Electrochemically Mediated Lithium Extraction for Energy and Environmental Sustainability

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