公开(公告)号：US20250163590A1

公开(公告)日：2025-05-22

申请号：US18841303

申请日：2023-02-24

Applicant: THE JOHNS HOPKINS UNIVERSITY

Inventor： Chao Wang ,  Fei Xu ,  Guangye Zhou

IPC: C25B1/46 ,  C25B9/19 ,  C25B11/097 ,  C25B13/05 ,  C25B15/08

Abstract: Disclosed herein are compositions, devices, and methods for producing lithium hydroxide by electrochemical extraction of lithium from lithium-containing solutions, including unconventional sources that have low lithium content, such as brine and seawater.

公开(公告)号：US11607679B2

公开(公告)日：2023-03-21

申请号：US16499545

申请日：2018-04-02

Applicant: THE JOHNS HOPKINS UNIVERSITY

Inventor： Chao Wang

IPC: H01M4/92 ,  B01J35/00 ,  B01J23/89 ,  B01J37/34 ,  C25B11/04 ,  B82Y30/00 ,  B82Y40/00 ,  H01M4/86 ,  H01M8/10

Abstract: Core-shell nanoparticles having a solid core comprising a first metal and a shell comprising a second metal disposed at least a portion of the exterior surface of the core. The core-shell nanoparticles comprise a non-precious transition metal and the second metal comprises a precious metal or semi-precious metal. The core-shell nanoparticles can be used to catalyze oxygen reduction reactions. Also provided are compositions comprising the core-shell nanoparticles, methods of making same, and devices of same.

公开(公告)号：US20190293651A1

公开(公告)日：2019-09-26

申请号：US16431441

申请日：2019-06-04

Applicant: The Johns Hopkins University

Inventor： Chao Wang ,  Kellogg Schwab ,  Charles Young

IPC: G01N33/569 ,  G01N33/543 ,  G01N21/64 ,  G01N21/552

Abstract: The presently disclosed fluidic sensor system and method comprise multifunctional nanoprobe-enabled capture for early detection of chemical and/or biological pathogens in a liquid sample. This sensor system and method can be used for food and environmental monitoring.

公开(公告)号：US11518722B2

公开(公告)日：2022-12-06

申请号：US16971562

申请日：2019-02-19

Applicant: THE JOHNS HOPKINS UNIVERSITY

Inventor： Chao Wang ,  Pengfei Xie ,  Tiancheng Pu

IPC: B01J23/10 ,  B01J23/38 ,  B01J23/42 ,  B01J35/10 ,  C07C2/84 ,  B01J35/00 ,  B01J37/04 ,  B01J37/08 ,  B01J37/10 ,  C10G45/70 ,  C10G50/00

Abstract: Described are methods for converting methane to olefins, aromatics, or a combination thereof using a single atom catalyst comprising CeO2 nanoparticles impregnated with individual atoms of noble metals including Pt, Pd, Rh, Ru, Ag, Au, Ir, or a combination thereof. These single atom catalysts of the present invention are heated with methane to form olefins and aromatics.

公开(公告)号：US20250091893A1

公开(公告)日：2025-03-20

申请号：US18963009

申请日：2024-11-27

Applicant: THE JOHNS HOPKINS UNIVERSITY

Inventor： Chao Wang ,  Michael J. Manto ,  Pengfei Xie

IPC: C01F17/235 ,  B01J23/10 ,  B01J23/92 ,  B01J35/23 ,  B01J38/68 ,  C07C201/12

Abstract: Described are methods of dephosphorylation. Methods of dephosphorylation include contacting a phosphate containing substrate with one or more CeO2 nanocrystal. Also described is modifying the pH of the dephosphorylation reaction to affect the amount and rate of dephosphorylation. Further described are methods of making CeO2 nanocrystals of the present disclosure.

公开(公告)号：US12151231B1

公开(公告)日：2024-11-26

申请号：US17466781

申请日：2021-09-03

Applicant: UNIVERSITY OF MARYLAND, COLLEGE PARK ,  THE JOHNS HOPKINS UNIVERSITY

Inventor： Liangbing Hu ,  Chao Wang ,  Pengfei Xie ,  Yonggang Yao

IPC: B01J23/755 ,  B01J21/18 ,  B01J23/28 ,  B01J23/72 ,  B01J23/745 ,  B01J23/75 ,  B01J35/00 ,  B01J35/40 ,  B01J37/02 ,  B01J37/08

Abstract: A catalytic structure has a plurality of high-entropy alloy (HEA) nanoparticles. Each HEA nanoparticle is composed of a homogeneous mixture of elements of cobalt (Co), molybdenum (Mo), and at least two transition metal elements. For example, in some embodiments, each HEA nanoparticle is a quinary mixture of Co, Mo, iron (Fe), nickel (Ni), and copper (Cu). The homogeneous mixture in each HEA nanoparticle forms a single solid-solution phase. The catalytic structure is used to catalyze a chemical reaction, for example, ammonia decomposition or ammonia synthesis. Methods for forming the catalytic structure are also disclosed.

公开(公告)号：US20230211326A1

公开(公告)日：2023-07-06

申请号：US17998836

申请日：2021-05-20

Applicant: The Johns Hopkins University

Inventor： Chao Wang ,  Pengfei Xie

IPC: B01J29/44 ,  C10G1/10 ,  C10G1/08 ,  C10G1/06

CPC classification number: B01J29/44 ,  C10G1/10 ,  C10G1/086 ,  C10G1/06 ,  C10G2300/1092 ,  C10G2300/4006 ,  C10G2300/4012 ,  C10G2300/70 ,  C10G2300/202 ,  C10G2400/30

Abstract: A highly active and selective solid catalyst comprising stable single-atom iridium (Ir) anchored in a zeolite, e.g., ZSM-5, for upcycling of plastics, such as high-density polyethylene, to yield valuable lower molecular weight hydrocarbon products is disclosed.

公开(公告)号：US20230191324A1

公开(公告)日：2023-06-22

申请号：US17926935

申请日：2021-05-19

Applicant: THE JOHNS HOPKINS UNIVERSITY

Inventor： Chao Wang ,  Peikun Wang ,  Zeyuan Sun ,  Pengfei Xie ,  Han Zong

IPC: B01D53/86 ,  B01J23/34 ,  B01D53/02 ,  B01D53/14 ,  F01N3/08

CPC classification number: B01D53/8628 ,  B01J23/34 ,  B01D53/02 ,  B01D53/14 ,  F01N3/0842 ,  B01D2255/2073 ,  B01D2257/404 ,  B01D2258/01 ,  F01N2370/02

Abstract: A Nitrogen Oxide (NOx) sorbent material of the present invention includes a multi-metallic oxide that includes one or more alkali or alkaline earth metal, one or more 3d transition metal, and one or more rare earth element. The NOx sorbent material is configured to adsorb and absorb NOx below a low temperature and to release the adsorbed or absorbed NOx at temperature at or above the low temperature. In some embodiments, a manganese catalyst is deposited on a high surface area carrier. The manganese catalyst takes the form of an alkali/metal promotor and an Mn-based compound. In general, the NOx sorbent material contains about one percent to about fifty percent by weight of alkali/alkaline earth metal manganese catalyst based on the total weight of the catalyst.

公开(公告)号：US20190217275A1

公开(公告)日：2019-07-18

申请号：US16249730

申请日：2019-01-16

Applicant: THE JOHNS HOPKINS UNIVERSITY

Inventor： Chao Wang ,  Michael J. Manto ,  Pengfei Xie

IPC: B01J23/10 ,  C01F17/00 ,  B01J23/92 ,  B01J35/00 ,  B01J38/68 ,  C07C201/12

CPC classification number: B01J23/10 ,  B01J23/92 ,  B01J35/0013 ,  B01J38/68 ,  C01F17/0043 ,  C01P2002/60 ,  C01P2002/72 ,  C01P2002/84 ,  C01P2002/85 ,  C01P2004/04 ,  C07C201/12

Abstract: Described are methods of dephosphorylation. Methods of dephosphorylation include contacting a phosphate containing substrate with one or more CeO2 nanocrystal. Also described is modifying the pH of the dephosphorylation reaction to affect the amount and rate of dephosphorylation. Further described are methods of making CeO2 nanocrystals of the present disclosure.

公开(公告)号：US20250073686A1

公开(公告)日：2025-03-06

申请号：US18953811

申请日：2024-11-20

Applicant: THE JOHNS HOPKINS UNIVERSITY

Inventor： Chao Wang ,  Pengfei Xie

IPC: B01J23/83 ,  B01D53/86 ,  B01J6/00 ,  B01J35/40 ,  B01J35/50 ,  B01J37/03 ,  B01J37/04

Abstract: CeO2 nanoparticles having a copper domain disposed on at least a portion of the nanoparticle. The material can catalyze a nitrogen oxide decomposition, such as a deNxOy reaction. Methods of making and using the material are also provided.