-
公开(公告)号：US11493493B2
公开(公告)日：2022-11-08
申请号：US16667258
申请日：2019-10-29
Inventor： Qasem Ahmed Drmosh , Zain Hassan Yamani , Mohammad Kamal Hossain
IPC: G01N33/00 , C23C8/16 , G01N27/407 , G01N27/12
Abstract: A hydrogen gas sensor with a substrate and a zinc oxide nanostructured thin film deposited on the substrate, wherein the zinc oxide nanostructured thin film has a lattice structure with a weight ratio of low binding energy O2− ions to medium binding energy oxygen vacancies in a range of 0.1 to 1.0, and a method of fabricating a gas sensor by thermally oxidizing a metal thin film under low oxygen partial pressure. Various combinations of embodiments of the hydrogen gas sensor and the method of fabricating the gas sensor are provided.
-
公开(公告)号：US11345605B2
公开(公告)日：2022-05-31
申请号：US16684360
申请日：2019-11-14
Inventor： Emad Naji Al-Shafei , Oki Muraza , Mohamed Ahmed , Ki-Hyouk Choi , Zain Hassan Yamani
Abstract: Methods and systems for production of consistently-sized BEA zeolite nano-crystals, the method including mixing an emulsion, the emulsion comprising a surfactant and an organic solvent; heating the emulsion; mixing a zeolite solution, the zeolite solution comprising a silicon-containing compound and an aluminum-containing compound; heating the zeolite solution; adding the emulsion to the zeolite solution drop-wise over time to create an zeolite emulsion solution mixture; heating the zeolite emulsion solution mixture; and precipitating the consistently-sized BEA zeolite nano-crystals.
-
公开(公告)号：US11118108B2
公开(公告)日：2021-09-14
申请号：US16222687
申请日：2018-12-17
Inventor： Md. Abdul Aziz , Mohammed Nasiruzzaman Shaikh , Zain Hassan Yamani
Abstract: Monodisperse carboxylate functionalized gold nanoparticles comprising a capping agent layer of pamoic acid and colloidal suspensions thereof are disclosed. These gold nanoparticles have an average particle size of greater than 15 nm or less than 8 nm and demonstrate significant fluorescent properties. In addition, a method for the size controlled preparation of these monodisperse carboxylate functionalized gold nanoparticles wherein pamoic acid acts as both a reducing and capping agent and wherein the size of the particles can be controlled by the pH of the process is disclosed. In addition, a method for the size controlled preparation of these monodisperse carboxylate functionalized gold nanoparticles utilizing seed mediated growth is disclosed.
-
公开(公告)号：US11090643B2
公开(公告)日：2021-08-17
申请号：US16675735
申请日：2019-11-06
Inventor： Emad Naji Al-Shafei , Oki Muraza , Ki-Hyouk Choi , Ali Al-Nasir , Zain Hassan Yamani , Idris Akolade Bakare , Mohammad Al-Abdullah
IPC: C01B39/02 , B01J37/02 , C10G47/16 , B01J37/00 , B01J29/40 , B01J29/90 , B01J37/04 , B01J37/08 , B01J38/12 , C01B39/38 , C10G11/05
Abstract: Systems and methods for production of externally-pore-blocked, internally-pore-opened modified zeolite crystals, the method including mixing zeolite crystals with an organic pore blocking agent; heating the zeolite crystals mixed with the organic pore blocking agent to block internal pores of the zeolite crystals and produce internally-pore-blocked zeolite crystals; mixing the internally-pore-blocked zeolite crystals with an external pore blocking agent; and calcining the internally-pore-blocked zeolite crystals mixed with the external pore blocking agent, to re-open internal pores via decomposition of the organic pore blocking agent and to block external pores via formation of a silica layer over external pores of the zeolite crystals, forming the externally-pore-blocked, internally-pore-opened modified zeolite crystals.
-
公开(公告)号：US20210147246A1
公开(公告)日：2021-05-20
申请号：US16684360
申请日：2019-11-14
Inventor： Emad Naji Al-Shafei , Oki Muraza , Mohamed Ahmed , Ki-Hyouk Choi , Zain Hassan Yamani
IPC: C01B39/46
Abstract: Methods and systems for production of consistently-sized BEA zeolite nano-crystals, the method including mixing an emulsion, the emulsion comprising a surfactant and an organic solvent; heating the emulsion; mixing a zeolite solution, the zeolite solution comprising a silicon-containing compound and an aluminum-containing compound; heating the zeolite solution; adding the emulsion to the zeolite solution drop-wise over time to create an zeolite emulsion solution mixture; heating the zeolite emulsion solution mixture; and precipitating the consistently-sized BEA zeolite nano-crystals.
-
Patent Agency Ranking
公开(公告)号：US20220266236A1
公开(公告)日：2022-08-25
申请号：US17185286
申请日：2021-02-25
Inventor： Emad Al-Shafei , Oki Muraza , Mohammed Ahmed Sanhoob , Mohammed Z. Al-Bahar , Ki-Hyouk Choi , Zain Hassan Yamani , Ali S. Al-Nasir
Abstract: According to embodiments, methods for the production of boron-silicalite-1 are disclosed. In embodiments, the method may include combining a mineralizer agent, a templating agent, water, and boric acid in a first microwave unit; heating the first microwave unit to form a boron-zeolite; calcining the boron-zeolite to form an alkali-zeolite; combining the alkali-zeolite with ammonium nitrate to produce an ion-exchanged zeolite; heating the ion-exchanged zeolite to form a protonated zeolite; and calcining the protonated zeolite to form the boron-silicalite-1. In embodiments, the method may include combining a templating agent, water, and boric acid in a first hydrothermal unit; heating the first microwave unit to form a boron-zeolite; calcining the boron-zeolite to form an alkali-zeolite; combining the alkali-zeolite with ammonium nitrate to produce an ion-exchanged zeolite; heating the ion-exchanged zeolite to form a protonated zeolite; and calcining the protonated zeolite to form the boron-silicalite-1. The boron-silicalite-1 may be microscale or nanoscale.
-
公开(公告)号：US20210130178A1
公开(公告)日：2021-05-06
申请号：US16675724
申请日：2019-11-06
Inventor： Emad Naji Al-Shafei , Oki Muraza , Mohamed Ahmed , Ki-Hyouk Choi , Ali Al-Nasir , Zain Hassan Yamani
Abstract: Methods and systems for production of consistently-sized BEA zeolite nano-crystals incorporating at least one metal oxide, the method including removing an organic template from a BEA zeolite comprising an organic template via calcination; desilicating the BEA zeolite following the step of removing the organic template; incorporating at least one metal oxide into the structure of the BEA zeolite after the step of desilicating; protonating the BEA zeolite after the step of incorporating the at least one metal oxide; and calcining the BEA zeolite after the step of protonating to form a modified BEA zeolite product.
-
公开(公告)号：US20210129127A1
公开(公告)日：2021-05-06
申请号：US16675735
申请日：2019-11-06
Inventor： Emad Naji Al-Shafei , Oki Muraza , Ki-Hyouk Choi , Ali Al-Nasir , Zain Hassan Yamani , Idris Akolade Bakare , Mohammad Al-Abdullah
IPC: B01J37/00 , B01J29/40 , B01J37/04 , B01J37/08 , C01B39/38 , C01B39/02 , B01J29/90 , B01J38/12 , C10G11/05
Abstract: Systems and methods for production of externally-pore-blocked, internally-pore-opened modified zeolite crystals, the method including mixing zeolite crystals with an organic pore blocking agent; heating the zeolite crystals mixed with the organic pore blocking agent to block internal pores of the zeolite crystals and produce internally-pore-blocked zeolite crystals; mixing the internally-pore-blocked zeolite crystals with an external pore blocking agent; and calcining the internally-pore-blocked zeolite crystals mixed with the external pore blocking agent, to re-open internal pores via decomposition of the organic pore blocking agent and to block external pores via formation of a silica layer over external pores of the zeolite crystals, forming the externally-pore-blocked, internally-pore-opened modified zeolite crystals.
-
公开(公告)号：US20190127632A1
公开(公告)日：2019-05-02
申请号：US16222687
申请日：2018-12-17
Inventor： Md. Abdul Aziz , Mohammed Nasiruzzaman Shaikh , Zain Hassan Yamani
Abstract: Monodisperse carboxylate functionalized gold nanoparticles comprising a capping agent layer of pamoic acid and colloidal suspensions thereof are disclosed. These gold nanoparticles have an average particle size of greater than 15 nm or less than 8 nm and demonstrate significant fluorescent properties. In addition, a method for the size controlled preparation of these monodisperse carboxylate functionalized gold nanoparticles wherein pamoic acid acts as both a reducing and capping agent and wherein the size of the particles can be controlled by the pH of the process is disclosed. In addition, a method for the size controlled preparation of these monodisperse carboxylate functionalized gold nanoparticles utilizing seed mediated growth is disclosed.
-
公开(公告)号：US20190085474A1
公开(公告)日：2019-03-21
申请号：US16192046
申请日：2018-11-15
Inventor： Md. Abdul Aziz , Mohammed Nasiruzzaman Shaikh , Zain Hassan Yamani , Wael Mahfoz , Fatai Olawale Bakare
Abstract: A method for manufacturing a palladium coated doped metal oxide conducting electrode including immersing a metal oxide conducting electrode into an aqueous solution having a palladium precursor salt to form the metal oxide conducting electrode having at least one surface coated with palladium precursor. To form a layer of palladium nanoparticles on the metal oxide conducting electrode the palladium precursor on the metal oxide conducting is reduced with a borohydride compound. The palladium nanoparticles on the metal oxide conducting electrode have an average diameter of 8 nm to 22 nm and are present on the surface of the metal oxide conducting electrode at a density from 1.5×10−3 Pd·nm−2 to 3.5×10−3 Pd·nm−2.
-
-
-
-
-
-
-
-
-
Search Results
28
records
(took 0.026 seconds)
