Structural Characterization of NiO/Cr2O3Composites and Hydrothermal Synthesis, Properties Gas Sensing

Mohammed, Ghuson H.; B.Hassan, Tunis; Abdulhamied, Zainab T

doi:10.22401/jnus.21.1.10

Cited by 2 publications

(2 citation statements)

References 5 publications

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“…21,22 There are several methods for the synthesis of Ni and Cr oxide nanocomposite, including sol-gel, 23 co-extrusion, 24 chemical oxidation, 25 and hydrothermal. 26 The appropriate corrosion and wear resistance of 304 stainless steel (SS304), along with other excellent functional properties and its reasonable price, are the primary reasons for its widespread use in industries. 9,[27][28][29][30] However, their vulnerability in intense oxidizing environments and lack of tailored performance in the hospital environment due to the growth of all kinds of bacteria are considered serious problems.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical, morphological, and corrosion features of Ni–Cr oxide nanocomposite coating deposited on SS304 by EPD

Mohammadzadeh,

Jafari,

Azargoon

2024

Int J Applied Ceramic Tech

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Ceramic composites are suitable materials to improve the surface characteristics of steel. Therefore, in this research, Ni–Cr oxide nanocomposite was coated on 304 stainless steel (SS304) by the electrophoretic approach. The effect of chemical composition and coating parameters (time and voltage) was investigated on morphology, corrosion, microhardness, and wear behavior. The nanocomposites were successfully synthesized in three different compositions (Ni–Cr oxides of 70–30, 60–40, and 50–50). The products were coated on the SS304 in 1, 2, and 3 min and 90, 110, and 130 V. Fourier‐transform infrared spectroscopy, X‐ray diffraction, transmission electron microscope, and field emission scanning electron microscopy analyses were employed to investigate the characteristics of the synthesized powder and resulting coatings. The hardness, wear properties, and corrosion resistance of the coating were studied by microhardness, ball‐on‐disk, electrochemical impedance spectroscopy, and polarization methods. The coatings deposited at 1 min and 110 V were sound and free of microcracks. The wear resistance increased by increasing Cr%, so the 50–50 coating showed the best wear resistance with a friction coefficient of .763 and wear mass of 1.6 mg. However, the coating 70–30 presented the highest microhardness of 180.28 Hv. The coating 60–40 had the best corrosion resistance with a corrosion current density of 5.92 µA/cm2. The corrosion resistance improved for thicker coatings.

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Section: Introductionmentioning

confidence: 99%

“…This outstanding feature makes Ni and Cr oxide nanoparticles suitable for use in bacterial environments such as hospitals or biological laboratories 21,22 . There are several methods for the synthesis of Ni and Cr oxide nanocomposite, including sol–gel, 23 co‐extrusion, 24 chemical oxidation, 25 and hydrothermal 26 …”

Section: Introductionmentioning

confidence: 99%

Mechanical, morphological, and corrosion features of Ni–Cr oxide nanocomposite coating deposited on SS304 by EPD

Mohammadzadeh,

Jafari,

Azargoon

2024

Int J Applied Ceramic Tech

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Comprehensive study on morphological, structural and optical properties of Cr2O3 nanoparticle and its antibacterial activities

Kamari

Al‐Hada

Baqer

et al. 2019

J Mater Sci: Mater Electron

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Chromium (III) oxide (Cr2O3) nanoparticles are generated by thermal treatment (calcination) of precursor materials such as chromium nitrate along with a poly (vinyl pyrrolidone) capping agent. The samples produced were characterised by various techniques, including Xray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FT-IR). Examination results obtained from XRD showed that Cr2O3 nanoparticles exhibit hexagonal crystalline structures, with the presence of Cr and O in these novel materials being confirmed by results of analyses of both EDX and FT-IR. Results of TEM have pointed out that the average nanoparticle size was noticeably increased from 28 to 46 nm in relation to increase of calcination temperature of a range between 500 and 800 °C. The surface composition and valence state of the produced nanoparticles were examined by X-ray photoelectron spectroscopy (XPS), the optical energy gap has been evaluated using UV-visible reflectance spectra with the help of Kubelka-Munk equation. The energy band gap had a reversely proportional relationship with calcination temperature with a reduction in energy band gap from 3.12 to 3.01 eV. Photoluminescence (PL) spectra indicated an increase in photoluminescence with increasing particle size. The antibacterial activity of the Cr2O3 nanoparticles was evaluated in-vitro using gram-negative Escherichia coli ATCC 25922 and gram-positive Bacillus subtilis UPMC 1175.

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Structural Characterization of NiO/Cr2O3Composites and Hydrothermal Synthesis, Properties Gas Sensing

Cited by 2 publications

References 5 publications

Mechanical, morphological, and corrosion features of Ni–Cr oxide nanocomposite coating deposited on SS304 by EPD

Mechanical, morphological, and corrosion features of Ni–Cr oxide nanocomposite coating deposited on SS304 by EPD

Comprehensive study on morphological, structural and optical properties of Cr2O3 nanoparticle and its antibacterial activities

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