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公开(公告)号：US20230295817A1
公开(公告)日：2023-09-21
申请号：US18134325
申请日：2023-04-13
Inventor： Muhammad Ali EHSAN , Md. Abdul AZIZ , Abbas Saeed HAKEEM
IPC: C25B11/091 , C25B1/04 , B01J23/75 , B01J37/02 , B01J35/00 , C25B11/051 , C25B11/057
CPC classification number: C25B11/091 , B01J23/75 , B01J35/0033 , B01J37/0244 , C25B1/04 , C25B11/051 , C25B11/057 , C23C16/405
Abstract: A synthetic methodology for robust, nanostructured films of cobalt oxide over metal evaporated gold or similar material layer of, e.g., 50 nm, directly onto glass or other substrates via aerosol assisted chemical vapor deposition (AACVD). This approach allows film growth rates in the range of, e.g., 0.8 nm/s, using a commercially available precursor, which is ~10-fold the rate of electrochemical synthetic routes. Thus, 250 nm thick cobalt oxide films may be generated in only 5 minutes of deposition time. The water oxidation reaction for such films may start at ~0.6 V vs Ag/AgCl with current density of 10 mA/cm2 and is achieved at ~0.75 V corresponding to an overpotential of 484 mV. This current density is further increased to 60 mA/cm2 at ~1.5 V (vs Ag/AgCl). Electrochemically active surface area (ECSA) calculations indicate that the synergy between a Au-film, acting as electron sink, and the cobalt oxide film(s), acting as catalytic layer(s), are more pronounced than the surface area effects.
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公开(公告)号：US20220152700A1
公开(公告)日：2022-05-19
申请号：US16653566
申请日：2019-10-15
Inventor： Abbas Saeed HAKEEM , Akeem Yusuf ADESINA , Muhammad Umar AZAM , Bilal Anjum AHMED , Ahmad A. SOROUR
Abstract: Bearing steel comprising cubic boron nitride (c-BN) and/or nickel coated cBN spark plasma sintered at a temperature in the range of 850-1050° C. is disclosed. The tribological and corrosion resistance of the bearing steel improved with increasing the amount of c-BN. Further improvement in the properties was achieved with the incorporation of nickel coated c-BN, which caused a phase transition of the bearing steel from magnetic to non-magnetic phase accompanied by interdiffusion enhancement between the matrix and c-BN reinforcement.
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公开(公告)号：US20210147736A1
公开(公告)日：2021-05-20
申请号：US16684738
申请日：2019-11-15
Inventor： Md. Hasan ZAHIR , Mohammed Mozahar HOSSAIN , Md. SHAFIULLAH , Abbas Saeed HAKEEM
Abstract: A composite phase-change material containing a hierarchically porous Ca1-xMgxCO3 and having pores loaded with a phase change material is described. The heat storage material has a latent heat of melting 123 to 221 J/g, a latent heat of freezing of 107 to 201 J/g, and a thermal conductivity of 0.22 to 0.45 W·m−1·K−1. The phase change material may be polyethylene glycol, and the polyethylene glycol does not leak from the pores of the hierarchically porous Ca1-xMgCO3 when heating or cooling over phase transitions.
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公开(公告)号：US20210032521A1
公开(公告)日：2021-02-04
申请号：US16527807
申请日：2019-07-31
Inventor： Abbas Saeed HAKEEM , Akolade Idris BAKARE , Muhammad Ali EHSAN
IPC: C09K5/14 , C04B35/117 , C04B35/64
Abstract: A method for making ceramic composites via sintering a mixture of alumina and oil fly ash. The alumina is in the form of nanoparticles and/or microparticles. The oil fly ash may be treated with an acid prior to the sintering. The composite may comprise graphite carbon derived from oil fly ash dispersed in an alumina matrix. The density, mechanical performance (e.g. Vickers hardness, fracture toughness), and thermal properties (e.g. thermal expansion, thermal conductivity) of the ceramic composites prepared by the method are also specified.
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公开(公告)号：US20210032105A1
公开(公告)日：2021-02-04
申请号：US16530369
申请日：2019-08-02
Inventor： Abbas Saeed HAKEEM , Anwar UL-HAMID , Oki MURAZA , Muhammad Ali EHSAN
IPC: C01B21/082
Abstract: A method of making a β-SiAlON is described in involves mixing nanoparticles of AlN, Al2O3, and SiO2 with particles of Si3N4 and spark plasma sintering the mixture. The sintering may be at a temperature of 1450-1600° C. or about 1500° C. The particles of Si3N4 may be nanoparticles comprising amorphous Si3N4, or 25-55 μm diameter microparticles comprising β-Si3N4.
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Patent Agency Ranking
公开(公告)号：US20200381186A1
公开(公告)日：2020-12-03
申请号：US16425621
申请日：2019-05-29
Inventor： Muhammad Ali EHSAN , Abdul REHMAN , Abbas Saeed HAKEEM
IPC: H01G9/20 , H01G9/00 , C23C16/06 , C23C16/448 , C03C17/09
Abstract: Platinum films can be obtained by AACVD using a class of Pt-dialkyldithiocarbamates complexes, of the formula Pt(S2CNR2), wherein R is independently alkyl, such as isobutyl, aryl, or alkaryl, such as benzyl, particularly as single source precursors. The catalytic performance of the resulting Pt-films allows their use as counter electrodes in dye sensitized solar cells, for example. The efficiency of the AACVD-produced electrodes can be better than a conventionally used Pt-counter electrodes made by the doctor blade's method. The Pt(S2CNR2)-derived films have well connected and defect free surface topography and better catalytic performance, likely due to their high conductivity and reflectivity. A simple and low cost method employing such dithiocarbamate precursors can generate Pt-films and electrodes of broad applicability.
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公开(公告)号：US20240425991A1
公开(公告)日：2024-12-26
申请号：US18340094
申请日：2023-06-23
Inventor： Muhammad Ali EHSAN , Abbas Saeed HAKEEM
IPC: C25B1/04 , C25B11/031 , C25B11/054 , C25B11/061 , C25B11/079
Abstract: A method of generating oxygen including applying a potential of greater than 0 to 2.0 V to an electrochemical cell that is at least partially submerged in an aqueous solution such that on applying the potential the aqueous solution is oxidized thereby forming oxygen. The electrochemical cell includes an electrocatalyst and a counter electrode. The electrocatalyst includes a nickel foam substrate and a layer of particles of manganese oxide having a formula of MnxOy on a surface of the nickel foam substrate, where x is an integer from 1 to 7, and where y is an integer from 1 to 13. The particles of MnO have a spherical shape with an average diameter of 5-15 nanometers (nm) and are aggregated with an average aggregate size of 500-1,000 nm in the shape of a cauliflower.
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18.发明公开公开(公告)号：US20240309522A1
公开(公告)日：2024-09-19
申请号：US18183760
申请日：2023-03-14
Inventor： Muhammad Ali EHSAN , Abuzar KHAN , Abbas Saeed HAKEEM
IPC: C25B11/052 , C23C16/40 , C23C16/448 , C25B1/04 , C25B9/17 , C25B11/031 , C25B11/061 , C25B11/077
CPC classification number: C25B11/052 , C23C16/405 , C23C16/4486 , C25B1/04 , C25B9/17 , C25B11/031 , C25B11/061 , C25B11/077
Abstract: A vanadium oxide-based electrode for electrochemical water splitting that includes a metallic substrate and a layer of particles of a vanadium oxide composite at least partially covering a surface of the metallic substrate. The particles of the vanadium oxide composite are in the form of nanobeads having an average particle size of 50 to 400 nm. A method of making the electrode.
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公开(公告)号：US20220376221A1
公开(公告)日：2022-11-24
申请号：US17874353
申请日：2022-07-27
Inventor： Muhammad Ali EHSAN , Manzar SOHAIL , Abbas Saeed HAKEEM
Abstract: A method of making a nanostructured palladium thin film electrode is described. The method involves contacting a substrate with an aerosol comprising a solvent and a Pd(II) compound. The substrate is heated, and no hydrogen gas or an additional reducing agent is required to reduce the Pd(II) to form the deposited thin film. The nanostructured palladium thin film electrode is capable of detecting compounds such as hydrazine in an aqueous sample with a 10 nM limit of detection.
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公开(公告)号：US20210276870A1
公开(公告)日：2021-09-09
申请号：US16812798
申请日：2020-03-09
Inventor： Md. Abdul AZIZ , Shaik BASHA , Abbas Saeed HAKEEM , Mohammed MASLEHUDDIN , Shamsad AHMAD
Abstract: A method of producing submicron carbon particles from oil ash. The method comprises pyrolyzing the oil ash to produce a pyrolyzed oil ash and milling the pyrolyzed oil ash to produce carbon particles having a mean particle size in the submicron regime. The method produces submicron carbon particles which have a very high carbon content (90 to 99 atom %) and a very low content of oxygen, the particles having a ratio of carbon to oxygen ratio of 10:1 to 99:1. The size of the particles may be controlled by the duration of the milling. The submicron carbon particles are devoid of functionalities containing carbon-oxygen double bonds as measured by Raman spectroscopy and X-ray photoelectron spectroscopy (XPS).
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