Centimetric-Sized Chromium (III) Oxide Object Synthesized by Means of the Carbon Template Replication

Gibot, Pierre

doi:10.3390/ceramics3010010

Cited by 16 publications

(6 citation statements)

References 47 publications

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“…TiNi-5 and TiNi-20 films (Figure C) show the presence of TiO 2 , NiSi, TiC, and SiC. − A peak corresponding to 002 graphite is also observed on TiNi-5 and TiNi-20. CrNi-5 shows (Figure D) the presence of Cr 2 O 3 in addition to CrN on the surface. , CrNi-20 films exhibit the presence of Cr 2 O 3 and other phases, similar to what is observed in CrNi-5. However, it is worth noting that the peaks in the CrNi-20 case exhibit a slightly broader profile compared to those in the CrNi-5 case.…”

Section: Resultssupporting

confidence: 66%

“…CrNi-5 shows (Figure 4D) the presence of Cr 2 O 3 in addition to CrN on the surface. 53,54 CrNi-20 films exhibit the presence of Cr 2 O 3 and other phases, similar to what is observed in CrNi-5. However, it is worth noting that the peaks in the CrNi-20 case exhibit a slightly broader profile compared to those in the CrNi-5 case.…”

Section: Gixrd Gixrd Analysis Of Pristinesupporting

confidence: 75%

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Ni Drastically Modifies the Microstructure and Electrochemistry of Thin Ti and Cr Layers

Kousar,

Quliyeva,

Pande

et al. 2024

J. Phys. Chem. C

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There is a significant lack of literature addressing changes in the microstructure of different interfacial metal layer combinations employed in fabricating electrochemical sensors based on carbon nanomaterials. This research gap extends to analyzing their influence on the electrochemical performance, which, in turn, impacts the understanding of the properties of materials incorporating these layers. In this study, microstructural variations and electrochemical activity of chromium and titanium adhesion layers, in combination with nickel catalyst layers (designated as TiNi and CrNi), on silicon wafers were analyzed post annealing. Interestingly, during a brief annealing period of 5 min, TiNi developed a surface layer comprising graphitic carbon, alongside the formation of TiO 2 , TiC, and NiSi, and exhibited electrochemical activity toward both dopamine (DA) and ascorbic acid (AA). Conversely, CrNi annealed for 5 min did not show the presence of such a carbon layer and displayed no discernible electrochemical activity toward the target molecules. Only after an extended annealing time of 20 min, signs of a carbon layer appear on CrNi, displaying a moderate electrochemical activity toward DA and AA. The formation of a carbon layer on CrNi is delayed due to the presence of Ni near the surface, which disrupts the local equilibrium. Consequently, the formation of the Cr 2 O 3 barrier layer is delayed, which in turn permits carbon diffusion into the underlying Cr layer. Conversely, Ni stabilizes the β-Ti form and markedly decreases the solubility of carbon and oxygen within the TiNi system. By providing a comprehensive analysis of microstructural changes and their impact on the surface chemistry and electrochemical responses of commonly used interfacial metal layers, this paper offers invaluable insights in selecting suitable adhesion and catalyst layer combinations for carbon nanomaterial fabrication.

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Section: Resultssupporting

confidence: 66%

Section: Gixrd Gixrd Analysis Of Pristinesupporting

confidence: 75%

Ni Drastically Modifies the Microstructure and Electrochemistry of Thin Ti and Cr Layers

Kousar,

Quliyeva,

Pande

et al. 2024

J. Phys. Chem. C

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“…According to GIXRD patterns, Cr/Si before annealing possesses chromium in the metallic form, which oxidizes on annealing. 38,39 Formation of CrN is also taking place on the annealed Cr layer as apparent from the XRD spectra. 40 The small peaks at around 50-551 are due to reflections of 311 planes of the Si(100) substrate.…”

Section: Resultsmentioning

confidence: 94%

Enhancing electrocatalytic activity in metallic thin films through surface segregation of carbon

Kousar,

Quliyeva,

Pande

et al. 2024

Phys. Chem. Chem. Phys.

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“…The XRD patterns of Ni@Cr-G exhibit identical diffraction peaks of Ni@G that are related to the deposition of fcc NiO and graphene with an additional 8 diffraction peaks. The additional 8 diffraction peaks are located at 2Ɵ values equal to 24.1°, 33.5°, 35.8°, 41.4°, 48.5°, 54.4°, 63.1°, and 68.6° are associated with Eskolaite chromium (III) oxide phase (Cr 2 O 3 ) (JCPDS # 038‐1479) 57 . The XRD patterns of Ni@Cr-G@MA show comparable diffraction peaks to Ni@Cr-G, demonstrating that the grafting of myristic acid on the Ni@Cr-G coat has no impact on the crystal orientation.…”

Section: Resultsmentioning

confidence: 99%

“…The broad graphene peak demonstrates the material's small particle size. The XRD patterns of Ni@Cr-G exhibit identical diffraction peaks 57 . The XRD patterns of Ni@Cr-G@MA show comparable diffraction peaks to Ni@Cr-G, demonstrating that the grafting of myristic acid on the Ni@Cr-G coat has no impact on the crystal orientation.…”

mentioning

confidence: 89%

Construction of superhydrophobic graphene-based coating on steel substrate and its ultraviolet durability and corrosion resistance properties

Mohamed

Mekhaiel

Mahgoub

2023

Sci Rep

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For the first time, a facile and environmentally friendly approach for producing high-quality graphene from the biomass of banana leaves is described in this paper. Two rough coats of Ni-graphene, Ni@G, and Ni-graphene doped with chromium, Ni@Cr-G, were created on steel substrates by electrostatic deposition. These coatings were then submerged in an ethanolic solution of myristic acid, MA, to produce a superhydrophobic, SHP, surface. The Raman spectra demonstrated that the generated graphene was of high quality. Fourier transform infrared spectroscopy findings confirm the modification of the Ni@G coating by MA, Ni@G@MA, and the modification of the Ni@Cr-G composite with MA, Ni@Cr-G@MA. The results of the scanning electron microscope revealed that the created SHP coatings have nanoscale features. The wettability results showed that the water contact angle values for Ni@G@MA and Ni@Cr-G@MA coatings are 158° and 168°, while the water sliding angle values for both coatings are 4.0 o and 1.0°, respectively. The atomic force microscopy results show that both Ni@G and Ni@Cr-G coatings increase the roughness of the steel. The chemical and mechanical stability of the Ni@Cr-G@MA coating was higher than those of the Ni@G@MA coating. The coated steel by Ni@Cr-G@MA exhibits UV stability up to 110 h, while the SHP-coated steel by Ni@G@MA exhibits UV stability for 60 h. The potentiodynamic polarization results show that the value of the corrosion current density for bare steel is 13 times that of steel coated with Ni@G@MA, and 21 times that of coated steel with Ni@Cr-G@MA. The electrochemical impedance spectroscopy, EIS, results show that the charge transfer resistance for steel coated with Ni@G@MA is 38 times that of bare steel, while steel coated with Ni@Cr-G@MA is 57 times that of bare steel. Potentiodynamic polarization and EIS results show that the SHP Ni@Cr-G@MA film exhibits higher corrosion resistance than Ni@G@MA film.

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Centimetric-Sized Chromium (III) Oxide Object Synthesized by Means of the Carbon Template Replication

Cited by 16 publications

References 47 publications

Ni Drastically Modifies the Microstructure and Electrochemistry of Thin Ti and Cr Layers

Ni Drastically Modifies the Microstructure and Electrochemistry of Thin Ti and Cr Layers

Enhancing electrocatalytic activity in metallic thin films through surface segregation of carbon

Construction of superhydrophobic graphene-based coating on steel substrate and its ultraviolet durability and corrosion resistance properties

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