公开(公告)号：US20240391793A1

公开(公告)日：2024-11-28

申请号：US18794567

申请日：2024-08-05

Applicant: Central Labs ,  King Khalid University

Inventor： Mohd. Shkir ,  Jagadeesha Angadi V ,  S.M. Al-Moayid ,  Hamed Majdooa Algarni ,  Haitham Elhosiny Ali ,  Yasmin Khairy ,  Chatham Kumar B ,  Mohd Ubaidullah ,  Kamlesh V. Chandekar

IPC: C01G49/00 ,  C09C3/12 ,  G01N27/04

Abstract: The present invention relates to a process for preparing lutetium-doped zinc-ferrite ceramics for humidity sensor application and its composition thereof. This invention discloses a composition for lutetium-doped zinc ferrite ceramics, optimized for humidity sensor applications. The composition comprises specified weight percentages of zinc nitrate, iron nitrate, lutetium nitrate, glucose, urea, and optional distilled water. A corresponding synthesis process involves stoichiometric mixing, addition of glucose and urea, stirring with distilled water, and subsequent combustion in a preheated furnace. The ratio of lutetium varies from 0.00 to 0.07. The resulting ZnFe(2-x)LuxO4 nanoparticles exhibit stability and uniformity, confirmed through XRD, FTIR, and SEM analyses. The humidity sensor performance is evaluated, with an optimized Lu=0.05 composition demonstrating a remarkable 93% sensing response. This composition and process offer potential for efficient and stable humidity sensors in various applications.

公开(公告)号：US20230221273A1

公开(公告)日：2023-07-13

申请号：US18184355

申请日：2023-03-15

Applicant: Mohd. Shkir ,  King Khalid University

Inventor： S.M. Al-Moayid ,  Mohd. Shkir ,  Haitham Elhosiny Ali ,  Hamed Majdooa Algarni ,  Jagadeesha Angadi V ,  Mohd Ubaidullah ,  Abdullah M. Al-Enizi

IPC: G01N27/12 ,  B01J19/18 ,  B01J19/00 ,  B01J6/00

CPC classification number: G01N27/121 ,  G01N27/125 ,  B01J19/1862 ,  B01J19/0066 ,  B01J6/008

Abstract: The present invention generally relates to a system for preparing reduced graphene-cobalt chromate composite for humidity sensor applications comprises a first glass beaker for pouring 3-7 grams of sucrose; a preheated muffle furnace for heating the first glass beaker containing sucrose for 5-15 minutes at 450-500° C. in an oxygen environment and obtaining the black foam of rGO after hydrating the sugar; a second glass beaker for mixing 3-7 grams rGO, 3-7 grams carbamide, 3-7 grams cobaltous, and 3-7 grams chromium nitrate and dissolving with double-distilled water; and a magnetic stirrer for stirring the mixed solution for 450 minutes to generate a homogenous solution and burning the uniform mixture at 425° C. in the preheated muffle furnace for 20 minutes to obtain graphene-cobalt chromate composite.

公开(公告)号：US20230212403A1

公开(公告)日：2023-07-06

申请号：US18175920

申请日：2023-02-28

Applicant: Mohd. Shkir ,  King Khalid University

Inventor： Shoyebmohamad F. Shaikh ,  Sharifah Mohammed Ali Al-Moayid ,  Balaji G. Ghule ,  Mohd. Shkir ,  Haitham Elhosiny Ali ,  Hamed Majdooa Algarni ,  Mohd Ubaidullah ,  Rajaram S. Mane

IPC: C09D1/00 ,  C01G23/053 ,  C09D7/63 ,  H10K30/50 ,  H01G9/20 ,  H01G9/00 ,  H01G11/46 ,  H01G11/86 ,  C23C18/12 ,  C23C14/18 ,  C23C14/24 ,  G01N27/48

CPC classification number: C09D1/00 ,  C01G23/0536 ,  C09D7/63 ,  H10K30/50 ,  H01G9/2031 ,  H01G9/0029 ,  H01G11/46 ,  H01G11/86 ,  C23C18/1216 ,  C23C14/18 ,  C23C14/24 ,  G01N27/48

Abstract: The process comprises treating 90-190 g titanium (IV) chloride in 10-100 ml de-ionized water for preparing Titanium cation (Ti4+); treating 130-275 ml potassium persulfate in 10-100 ml double-distilled water and keeping at constant temperature to obtain sulphate/oxide; dipping substrates into titanium (IV) chloride solution and re-dipping in de-ionized water to remove loosely bonded ions, if could be any; dipping substrates into potassium persulfate solution and re-dipping in de-ionized water to remove loosely bonded ions, if could be any, and keeping at 50-90° C. for complete one cycle; treating obtained Titanium cation (Ti4+) with sulphate/oxide and obtaining whitish layer on the substrate surface by necked eyes after about 10-15 cycles, suggesting initiation of film formation, wherein the deposition thickness of TiO2 layer is increased from 0.3-2.0-micron on determined 5-50 deposition cycles; and rinsing deposited films with de-ionized water and air annealed at 400-600° C. temperature to obtain anatase TiO2.

公开(公告)号：US12025577B2

公开(公告)日：2024-07-02

申请号：US18184355

申请日：2023-03-15

Applicant: Mohd. Shkir ,  King Khalid University

Inventor： S. M. Al-Moayid ,  Mohd. Shkir ,  Haitham Elhosiny Ali ,  Hamed Majdooa Algarni ,  Jagadeesha Angadi V ,  Mohd Ubaidullah ,  Abdullah M. Al-Enizi

IPC: H01B1/04 ,  B01J6/00 ,  B01J19/00 ,  B01J19/18 ,  C01B32/182 ,  G01N27/12

CPC classification number: G01N27/121 ,  B01J6/008 ,  B01J19/0066 ,  B01J19/1862 ,  C01B32/182 ,  G01N27/125 ,  H01B1/04

Abstract: The present invention generally relates to a system for preparing reduced graphene-cobalt chromate composite for humidity sensor applications comprises a first glass beaker for pouring 3-7 grams of sucrose; a preheated muffle furnace for heating the first glass beaker containing sucrose for 5-15 minutes at 450-500° C. in an oxygen environment and obtaining the black foam of rGO after hydrating the sugar; a second glass beaker for mixing 3-7 grams rGO, 3-7 grams carbamide, 3-7 grams cobaltous, and 3-7 grams chromium nitrate and dissolving with double-distilled water; and a magnetic stirrer for stirring the mixed solution for 450 minutes to generate a homogenous solution and burning the uniform mixture at 425° C. in the preheated muffle furnace for 20 minutes to obtain graphene-cobalt chromate composite.

公开(公告)号：US20240425406A1

公开(公告)日：2024-12-26

申请号：US18825753

申请日：2024-09-05

Applicant: Haitham Elhosiny Ali ,  King Khalid University

Inventor： El Sayed Yousef ,  Hamed Algarni ,  Haitham Elhosiny Ali ,  Yasmin Khairy ,  Awad A. Ibraheem ,  Mohd Shkir ,  Mohammed S. Alqahtani ,  A.M. Alshehri ,  Bozena Burtan-Gwizdala ,  Manuela Reben ,  Christian Russel

IPC: C03C4/12 ,  B24B7/24 ,  C03B3/02 ,  C03B5/173 ,  C03B5/187 ,  C03B5/24 ,  C03B19/02 ,  C03B25/02 ,  C03B27/02 ,  C03B40/02 ,  C03C3/247 ,  C03C17/245 ,  C03C21/00 ,  C03C23/00 ,  C09K11/77

Abstract: The present invention generally relates to a process for fabricating Chloro Alkali Phosphate Doped/Codoped by rare earth ions for optical laser amplifiers. The process includes mixing 38-42 wt. % of Phosphorus pentoxide (P2O5), 28-32 wt. % of Zinc oxide (ZnO), 9-11 wt. % of Barium fluoride (BaF2), 17-19 wt. % of Lithium chloride (LiCl), and 1-3 wt. % of Lead(II) fluoride (PbF2); filling a silica, platinum, and alumina crucible to the mixture; heating the mixture upon increasing a furnace temperature to 1000-1050° C. at a rate of 10° C. per minute and maintaining it for two hours to melt the glass; and pouring the glass melt into a preheated stainless steel mold at 350° C. and transferring the mold to a holding furnace heated to 350-370° C. and annealing for two hours thereby cooling to room temperature to obtain Chloro Alkali Phosphate matrix glass that is undoped, doped, or codoped with high thermal stability.

公开(公告)号：US20240124324A1

公开(公告)日：2024-04-18

申请号：US18517104

申请日：2023-11-22

Applicant: Mohd. Shkir ,  King Khalid University

Inventor： Mohd Ubaidullah ,  Anuj Kumar ,  Mohd. Shkir ,  Ala Manohar ,  S.M. Al-Moayid ,  Bidhan Pandit ,  Haitham Elhosiny Ali ,  Hamed Majdooa Algarni ,  Manish Gupta

IPC: C02F1/00

CPC classification number: C02F1/003 ,  C02F2301/08

Abstract: The present invention generally relates to a water purification device designed to operate primarily on gravitational force. The device comprises an inlet chamber (102) for storing surface water; and a filtration chamber (104) placed beneath the inlet chamber housing: a first filter made up of a 1:3 mixture of zeolite and acid-fractionalized activated charcoal, supported on a cotton bed; a second filter (104B) consisting of powdered eggshell membrane mixed with zeolite and Fe3O4 nanoparticles in a 5:3:1 ratio; and a third filter (104C) composed of a mixture of eggshell membrane powder, zeolite, Fe3O4, and AgNO3 nanoparticles, all supported on a cotton bed in a 5:3:1:1 ratio; and an outlet (106) adjusted at a bottom section for collecting purified water. The surface water enters from a top of the filtration chamber and is subjected to gravitational force, leading it through the series of filters towards the outlet.