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公开(公告)号：US20240151683A1
公开(公告)日：2024-05-09
申请号：US18382796
申请日：2023-10-23
Inventor： Xiao SU , Nayeong KIM , Johannes ELBERT
IPC: G01N27/333 , C08F130/04
CPC classification number: G01N27/333 , C08F130/04
Abstract: The design of electrochemically responsive halogen donors in redox-active polymer for switchable electrosorption and release of anions. A redox-active group such as ferrocene acts as an electron-withdrawing group, facilitating the delocalization of the electrons on the halogen atom. Upon the oxidation of the ferrocene moiety, the halogen atom forms a partial-positive charge (σ-hole) on the elongation of the C—I bond, resulting in strong binding with anions in cooperation with the hydrogen bonds on the cyclopentadienyl ring on the oxidized ferrocene. During reduction of ferrocene, halogen bonding is deactivated, releasing the bound anions reversibly.
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公开(公告)号：US20250011200A1
公开(公告)日：2025-01-09
申请号：US18760457
申请日：2024-07-01
Inventor： Xiao SU , Kihyun CHO
IPC: C02F1/469 , C02F101/10 , C02F101/20 , C02F101/22 , C02F101/34
Abstract: A redox-functionalized photoelectrode includes (a) a photoactive structure comprising a semiconductor and (b) a redox polymer coated on the photoactive structure, where a valence band potential of the semiconductor is more positive than a redox potential of the redox polymer. A photoelectrochemical method for separating targeted ionic species from a liquid includes exposing a redox-functionalized photoelectrode, which includes a photoactive structure comprising a semiconductor and a redox polymer comprising a redox-active group coated on the photoactive structure, to a liquid to be treated. During the exposure, the redox-functionalized photoelectrode is illuminated with light having a wavelength greater than a bandgap of the semiconductor. Oxidation of the redox-active group occurs, and targeted ionic species are removed from the liquid by adsorption onto the redox polymer.
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公开(公告)号：US20240426013A1
公开(公告)日：2024-12-26
申请号：US18698241
申请日：2022-10-04
Inventor： Xiao SU , Kwiyong KIM
Abstract: A system for selective electrodeposition for metal recycling includes an electrochemical cell comprising: a fluid including first and second transition metals and a salt at a molar concentration of greater than 1 M; a working electrode in contact with the fluid. where the working electrode has a surface coated with a positively charged polyelectrolyte: and a counter electrode in contact with the fluid and spaced apart from the working electrode. The system also includes a power supply electrically connected to the working and counter electrodes.
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公开(公告)号：US20240294685A1
公开(公告)日：2024-09-05
申请号：US18568609
申请日：2022-06-09
Inventor： Xiao SU , Haley VAPNIK , Johannes ELBERT
IPC: C08F230/04 , B01D15/20 , B01D15/36 , C02F1/42 , C02F101/20 , C09D143/00
CPC classification number: C08F230/04 , B01D15/203 , B01D15/362 , C02F1/42 , C09D143/00 , C02F2001/425 , C02F2101/20 , C02F2303/16
Abstract: Rare earth elements (REEs) play an essential role in our modern society, being critical resources for the growing electronic devices and renewable energy technologies. For the reversible capture and release of REEs, we designed and synthesized a redox-copolymer poly(ferrocenylpropyl methacrylamide-co-methacrylic acid) (P(FPMAm-co-MAA)) that combines an ion-exchange carboxylic acid group for REE adsorption, and an redox-active ferrocene moiety for electrochemical regeneration. By molecularly tuning the copolymer composition, efficient adsorption uptake could be achieved alongside electrochemically regenerated adsorbent reuse. The copolymer sorbent showed stoichiometric binding for yttrium (Y), cerium (Ce), neodymium (Nd), europium (Eu), gadolinium (Gd), and dysprosium (Dy) based on carboxylic acid active site.
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Patent Agency Ranking
公开(公告)号：US20240352610A1
公开(公告)日：2024-10-24
申请号：US18685739
申请日：2022-04-20
Inventor： Xiao SU , Stephen COTTY
CPC classification number: C25C1/20 , B01J38/485
Abstract: Herein disclosed is a new electrochemical approach to catalyst capture and recycling that overcomes conventional industrial recovery methods using functionalized redox-polymer electrodes. This technology provides a redox electro-separation system comprising polyvinylferrocene that was able to capture platinum group metal based catalysts directly from products and transfer to fresh reactants achieving 99.5% recovery without disturbing catalyst activity. Several reactions were tested along with various solvent-electrolyte matrices, showing >99% recovery efficiencies for platinum species as low as 1.6 ppm.
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公开(公告)号：US20240270611A1
公开(公告)日：2024-08-15
申请号：US18568009
申请日：2022-06-30
Applicant: The Board of Trustees of the University of Illinois , Kongju National University Industry-University Cooperation Foundation
Inventor： Xiao SU , Nayeong KIM , Johannes ELBERT , Choonsoo KIM
IPC: C02F1/469 , C02F1/461 , C02F101/30
CPC classification number: C02F1/4693 , C02F2001/46133 , C02F2101/30 , C02F2201/46135 , C02F2201/4618
Abstract: A system for redox-mediated electrodialysis includes: a first electrode; a second electrode positioned in opposition to the first electrode; an anion exchange membrane and a cation exchange membrane positioned between the first and second electrodes; a feed channel for flow of a treating fluid, the feed channel extending between the anion and cation exchange membranes; an additional membrane or pair of membranes between the first and second electrodes, the additional membrane or pair of membranes defining a collection channel on one or both sides of the feed channel for collecting anions and cations removed from the treating fluid, the additional membrane or pair of membranes including an anion exchange membrane and/or a cation exchange membrane; and a redox channel for flow of a redox fluid, the redox channel containing the first and second electrodes and being separated from the feed and/or collection channels by the anion and/or cation exchange membranes.
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公开(公告)号：US20240254017A1
公开(公告)日：2024-08-01
申请号：US18423742
申请日：2024-01-26
Inventor： Xiao SU , Kwiyong KIM
IPC: C02F1/461 , C02F1/467 , C02F101/16 , C25B1/27 , C25B11/052
CPC classification number: C02F1/46109 , C02F1/4676 , C25B1/27 , C25B11/052 , C02F2001/46142 , C02F2101/163 , C02F2303/16
Abstract: A redox-active composite comprises a conductive substrate including electrosorbent regions and electrocatalytic regions thereon, where the electrosorbent regions comprise a redox-active polymer and the electrocatalytic regions comprise a metal oxide. An electrochemical cell for electrochemical reactive separation of nitrate to ammonia includes a vessel configured for flow of a fluid therethrough, a bifunctional electrode comprising the redox-active composite positioned in the vessel, and a counter electrode spaced apart from the bifunctional electrode in the vessel.
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公开(公告)号：US20240132776A1
公开(公告)日：2024-04-25
申请号：US18376348
申请日：2023-10-03
Inventor： Xiao SU , Jemin JEON , Johannes ELBERT
IPC: C09K11/06
CPC classification number: C09K11/06 , C09K2211/1425 , C09K2211/187
Abstract: Chiral redox-polymers that have been enabled for electrochemically-controlled enantioselective interactions. Supramolecular chirality was leveraged for enhancing recognition toward target enantiomers. Chiral redox-metallopolymers were synthesized based on Ugi's amine-inspired chiral monomers, and their enantioselective recognition toward ionic enantiomers, such as tryptophan and naproxen, is demonstrated, with higher enhancement provided by a chiral redox-polymer over a single-site, chiral building block. 2D nuclear magnetic resonance spectroscopy and solid-state circular dichroism support supramolecular chirality resulting from the intramolecular interaction between the ferrocene and the alkyl group in the backbone. The chiral redox-metallopolymers can be used as a platform for electrochemically-modulated enantioselective interactions toward a range of amino acids and pharmaceutical carboxylates.
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公开(公告)号：US20240025777A1
公开(公告)日：2024-01-25
申请号：US18223653
申请日：2023-07-19
Inventor： Xiao SU , Nayeong Kim , Johannes Elbert
CPC classification number: C02F1/4693 , B01D61/46 , B01D61/027 , B01D71/10 , B01D69/02 , C02F1/442 , B01D2325/02831 , B01D2325/02832 , C02F2305/00 , C02F2103/08
Abstract: A system for redox polymer electrodialysis includes: a first electrode; a second electrode positioned in opposition to the first electrode; a pair of size-exclusion membranes positioned between the first and second electrodes; an ion exchange membrane positioned between the pair of size-exclusion membranes, the ion exchange membrane defining a feed channel and an accumulating channel between the size-exclusion membranes; and a redox channel containing the first and second electrodes and being separated from the feed and/or accumulating channels by the pair of size-exclusion membranes.
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