Enhancement of gas response of annealed ZnO film for hydrogen gas detection

Thamir A.A. Hassan

doi:10.30723/ijp.v12i23.341

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Publication Date

Mon Feb 18 2019

Journal Name

Iraqi Journal Of Physics

Volume

12

Issue Number

23

DOI

10.30723/ijp.v12i23.341

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Enhancement of gas response of annealed ZnO film for hydrogen gas detection

RF-sputtering

Zinc oxide

Gas sensor

Oxygen-vacancy model.

Thamir A.A. Hassan

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The mechanism of hydrogen (H₂) gas sensor in the range of 50-200 ppm of RF-sputtered annealed zinc oxide (ZnO) and without annealing was studied. The X-ray Diffraction( XRD) results showed that the Zn metal was completely converted to ZnO with a polycrystalline structure. The I–V characteristics of the device (PT/ZnO/Pt) measured at room temperature before and after annealing at 450 ^oC for4h, from which a linear relationship has been observed. The sensors had a maximum response to H₂ at 350 ^oC for annealing ZnO and showed stable behavior for detecting H₂ gases in the range of 50 to 200 ppm. The annealed film exhibited higher response than the film without annealing.. The sensing mechanism was modeled according to the oxygen–vacancy model.

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Publication Date

Wed Jan 01 2003

Journal Name

Turkish Journal Of Chemistry

Gas Chr Gas Chromatographic Separ aphic Separation of Phenol Deriv ation of Phenol Derivatives by Schiff- y SchiffBase Liquid Crystalline Stationary Phases

gas chromatograph

liquid crystalline

Mohammed Ali

Abdul-Muhsin Abdul-Hameed

Maha Tahir Sultan

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The chromatographic behaviour of liquid crystalline compounds benzylidene-p-aminobenzoic acid and 4-(p-methyl benzylidene)-p-aminobenzoic acid as stationary phases for the separation of dimethylphenol isomers was investigated. These isomers were analysed on benzylidene-p-aminobenzoic acid within a nematic range of 169-194 ◦C with a temperature interval of 5 ◦C. Better peak resolution was at a column temperature of 190 ◦C. The analysis was repeated on a 4-(p-methyl benzylidene)-p-aminobenzoic acid column at a nematic temperature of 256 ◦C, which represented the end of the nematic range, and gave the optimum peak resolution. It was found that isomer better separation was obtained at 20% loading for both liquid crystal materials. Other

Publication Date

Sat Jan 01 2022

Journal Name

Journal Of Petroleum Science And Engineering

Performance evaluation of analytical methods in linear flow data for hydraulically-fractured gas wells

Hydraulic fracturing

Shale gas reservoirs

Tight gas reservoirs

Unconventional reservoirs

Fracture half-length

Petroleum engineering

Atheer

Huda

Dheiaa

Omar

Mofazzal

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(7)

Publication Date

Sat Jun 30 2001

Journal Name

Iraqi Journal Of Chemical And Petroleum Engineering

Gas Holdup in a Bubble Column

A'amer Hameed

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Publication Date

Fri Dec 01 2023

Journal Name

Chemical Methodologies

Investigations on TiO<inf>2</inf>-NiO@In<inf>2</inf>O<inf>3</inf> Nanocomposite Thin Films (NCTFs) for Gas Sensing: Synthesis, Physical Characterization, and Detection of NO<inf>2</inf> and H<inf>2</inf>S Gas Sensors

M.A.

Fuad Tariq

S.

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(14)

Publication Date

Mon Oct 01 2018

Journal Name

Iraqi Journal Of Physics

Synthesis of gold nanoparticles by laser ablation on porous silicon for sensing CO2 gas

Porous silicon

gold nanoparticle

electrical properties

gas sensing. Article

Uday Muhsin

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In this research, porous silicon (PS) prepared by anodization etching on surface of single crystalline p-type Si wafer, then Gold nanoparticle (AuNPs) prepared by pulsed laser ablation in liquid. NPs deposited on PS layer by drop casting. The morphology of PS, AuNPs and AuNPs/PS samples were examined by AFM. The crystallization of this sample was characterized by X-ray diffraction (XRD). The electrical properties and sensitivity to CO2 gas were investigated to Al/AuNPs/PS/c-Si/Al, we found that AuNPs plays crucial role to enhance this properties.

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(3)

Publication Date

Tue Jan 01 2019

Journal Name

Proceedings Of The 17th Laccei International Multi-conference For Engineering, Education, And Technology: “industry, Innovation, And Infrastructure For Sustainable Cities And Communities”

Type Curve Techniques for Hydraulically Fractured Wells in Tight Gas Reservoir

Omar

Danilo

Kenny

Luis

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Publication Date

Mon Aug 10 2020

Journal Name

Journal Of Petroleum Exploration And Production Technology

Geomechanical modelling and two-way coupling simulation for carbonate gas reservoir

Barzan I.

M S

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Abstract<p>Geomechanical modelling and simulation are introduced to accurately determine the combined effects of hydrocarbon production and changes in rock properties due to geomechanical effects. The reservoir geomechanical model is concerned with stress-related issues and rock failure in compression, shear, and tension induced by reservoir pore pressure changes due to reservoir depletion. In this paper, a rock mechanical model is constructed in geomechanical mode, and reservoir geomechanics simulations are run for a carbonate gas reservoir. The study begins with assessment of the data, construction of 1D rock mechanical models along the well trajectory, the generation of a 3D mechanical earth model, and runni</p> ... Show More

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(11)

(8)

Publication Date

Tue Sep 11 2018

Journal Name

Iraqi Journal Of Physics

Gas sensing performance of Sol-gel grown NiO-doped Cr2O3 nanoparticles

Sol-gel

gas sensor

NiO doped Cr2O3 nanoparticles.

Tunis B.

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The sensors based on Nickel oxide doped chromic oxide (NiO: Cr2O3) nanoparticals were fabricated using thick-film screen printing of sol-gel grown powders. The structural, morphological investigations were carried out using XRD, AFM, and FESEM. Furthermore, the gas responsivity were evaluated towards the NH3 and NO2 gas. The NiO0.10: Cr2O3 nanoparticles exhibited excellent response of 95 % at 100oC and better selectivity towards NH3 with low response and recovery time as compared to pure Cr2O3 and can stand as reliable sensor element for NH3 sensor related applications.

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(2)

Publication Date

Thu Dec 01 2022

Journal Name

Structural Concrete

Enhancement of RC T‐beams toughness using laced stirrups reinforcement for blast response predictions

Abbas Abdulmajeed

Arshad

Mohanned

Ayman

Teghreed H.

Ali

Ibrahim

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Publication Date

Wed Dec 28 2022

Journal Name

Structural Concrete

Enhancement of RC T‐beams toughness using laced stirrups reinforcement for blast response predictions

Prof. Dr. Abbas

Arshad Nadhom

Mohanned

Ayman

Teghreed H.

Ali Hussein Ali

Ibrahim T.

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Abstract<p>The dynamic behavior of laced reinforced concrete (LRC) T‐beams could give high‐energy absorption capabilities without significantly affecting the cost, which was offered through a combination of high strength and ductile response. In this paper, LRC T‐beams, composed of inclined continuous reinforcement on each side of the beam, were investigated to maintain high deformations as predicted in blast resistance. The beams were tested under four‐point loading to create pure bending zones and obtain the ultimate flexural capacities. Transverse reinforcement using lacing reinforcement and conventional vertical stirrups were compared in terms of deformation, strain, and toughness changes of the tes</p> ... Show More

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