Chromium-doped titanium oxide nanotubes grown via one-step anodization for efficient photocathodic protection of stainless steel

Momeni, Mohamad Mohsen; Motalebian, Majid

doi:10.1016/j.surfcoat.2021.127304

Cited by 26 publications

(5 citation statements)

References 51 publications

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“…The one-step electrochemical anodizing process was used for the synthesis of TiO 2 -NTs plates . Titanium plates (99.9% purity, in the dimension of 2 × 2 cm) were first mechanically polished by sandpaper in grades 400 and 1000.…”

Section: Methodsmentioning

confidence: 99%

“…The one-step electrochemical anodizing process was used for the synthesis of TiO 2 -NTs plates. 40 Titanium plates (99.9% purity, in the dimension of 2 × 2 cm) were first mechanically polished by sandpaper in grades 400 and 1000. To remove any oxide layers, they were then rinsed in a solution of distilled water, HNO 3 , and HF with a volume ratio of 5:4:1, respectively, for 30 s. Plates were finally washed with distilled water and dried.…”

Section: ■ Introductionmentioning

confidence: 99%

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Substrate-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry of Some Small Biomolecules Using TiO₂-Nanotubes: The Effect of Nanotube Diameter and Salt Addition

Dodangeh

Farrokhpour

Ghaziaskar

et al. 2023

J. Am. Soc. Mass Spectrom.

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Substrate-assisted laser desorption/ionization (SALDI) is a kind of soft ionization method that is most suitable for the analysis of low molecular weight analytes when it is coupled with a time-of-flight mass spectrometer. Unlike the conventional matrix-assisted laser desorption/ionization, there is no interference in the SALDI with matrices for the low mass analyte peaks (m/z < 700). The focus of this work is to develop substrates based on nanomaterials to obtain higher sensitivity, better reproducibility, and easier preparation. The mass spectra of some small molecules (capecitabine, hemin, methadone, noscapine, oxycodone, thebaine, malathion, chlorpyrifos, ethion, permethrin, and phosalone) deposited on the TiO 2 -nanotube (TiO 2 -NTs) plate by the SALDI-TOF-MS technique are reported. The nanotubes are synthesized in different diameter sizes of nanotubes via the anodizing method. The intensity of the analyte peaks and the softness of ionization are optimized by varying the diameter of nanotubes and adding relevant alkali salts to the analytes. In addition, the reproducibility of the signal intensity of analytes is optimized by changing the surface hydrophilicity of the TiO 2 -NT plate.

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Section: Methodsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Substrate-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry of Some Small Biomolecules Using TiO₂-Nanotubes: The Effect of Nanotube Diameter and Salt Addition

Dodangeh

Farrokhpour

Ghaziaskar

et al. 2023

J. Am. Soc. Mass Spectrom.

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“…Upon the switch off of UV illumination, the coating would fail to protect the substrate metal due to the recombination of the photogenerated electrons and the existing holes, which eventually limits their industrial applications (Li et al, 2005). Researchers have tried to overcome these problems, using semiconductor coupling (Liu et al, 2014), metal doping (Momeni and Motalebian, 2021), and non-metal doping (Li et al, 2010), but most focused on improving photoelectric efficiency rather than on charge storage and discharge capabilities of TiO 2 . In addition, these technologies require complex experimental setups, rendering them impractical for onsite industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Novel photocatalytic coating for corrosion mitigation in 304LSS of dry storage canisters

et al. 2023

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Type 304L stainless steel (304LSS) is one of the candidate canister materials for storing radioactive spent fuels, usually near seashore environments along with nuclear power plants. During the prolonged exposure of dry storage canisters to saline environments, they are highly susceptible to chloride induced stress corrosion cracking. Failure of a dry storage canister not only would release radioactive isotopes into the environment, but would also lead to a costly replacement of the cracked canister. The objective of this study is to develop a multilayered titanium dioxide (TiO2) composite coating on a 304LSS substrate. With ultraviolet (UV) illumination, this coating would act as a barrier and simultaneously offer cathodic protection against corrosion in the substrate alloy. The composite coating consists of a plain amorphous TiO2 coating over another cerium-doped (Ce-doped) TiO2 coating. Electronic currents generated by photo-catalytic reaction of the amorphous TiO2 coating under UV illumination were measured. Photo-electrochemical analyses and surface morphology observations were conducted to evaluate the performance of the Ce-doped coatings on corrosion mitigation. Optimal amounts of cerium doping that offered better photo-cathodic protection were also explored. Results indicated that the Ce-doped TiO2 coating exhibited a better performance on photo-cathodic protection for 304L stainless steel in aerated 3.5% NaCl solutions than the one without cerium doping. The underlying Ce-doped TiO2 coating was effectively charged during UV illumination, and it was able to continuously release electrons even after the UV was switched off, thus providing uninterrupted photo-cathodic protection for the coated 304L stainless steel substrate.

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“…Most of all, titania exhibits wide band gap of 3.2 eV and 3.0 eV for anatase and rutile phases, respectively [ 17 ], meaning that it is not matching to the visible light region, and UV light is mainly absorbed by such material [ 18 ]. Another limitation is the fast recombination of electron–hole pairs formed by the titania [ 19 ]. According to the literature survey, the modification of titania with non-metals, metals, and metal oxides causes not only the reduction of the energy band gap contributing to the visible light absorption, but also improves the separation of charge carriers leading to the inhibition of electron–hole recombination [ 15 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Scanning with Laser Beam over the TiO2 Nanotubes Covered with Thin Chromium Layers towards the Activation of the Material under the Visible Light

et al. 2023

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This work presents pulsed UV laser treatment (355 nm, 2 Hz) of TiO2 nanotubes decorated with chromium oxides. The modification was performed in a system equipped with a beam homogenizer, and during the irradiation, the samples were mounted onto the moving motorized table. In such a system, both precisely selected areas and any large area of the sample can be modified. Photoelectrochemical tests revealed photoresponse of laser-treated samples up to 1.37- and 18-fold under the illumination with ultraviolet-visible and visible light, respectively, in comparison to bare titania. Optimal beam energy fluence regarding sample photoresponse has been established. Scanning electron microscopy images, X-ray diffraction patterns, along with Raman and X-ray photoelectron spectra, suggest that the enhanced photoresponse results from changes solely induced in the layer of chromium oxides. It is believed that the results of the present work will contribute to a wider interest in laser modification of semiconductors exhibiting improved photoelectrochemical activity.

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Chromium-doped titanium oxide nanotubes grown via one-step anodization for efficient photocathodic protection of stainless steel

Cited by 26 publications

References 51 publications

Substrate-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry of Some Small Biomolecules Using TiO₂-Nanotubes: The Effect of Nanotube Diameter and Salt Addition

Substrate-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry of Some Small Biomolecules Using TiO₂-Nanotubes: The Effect of Nanotube Diameter and Salt Addition

Novel photocatalytic coating for corrosion mitigation in 304LSS of dry storage canisters

Scanning with Laser Beam over the TiO2 Nanotubes Covered with Thin Chromium Layers towards the Activation of the Material under the Visible Light

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Chromium-doped titanium oxide nanotubes grown via one-step anodization for efficient photocathodic protection of stainless steel

Cited by 26 publications

References 51 publications

Substrate-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry of Some Small Biomolecules Using TiO2-Nanotubes: The Effect of Nanotube Diameter and Salt Addition

Substrate-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry of Some Small Biomolecules Using TiO2-Nanotubes: The Effect of Nanotube Diameter and Salt Addition

Novel photocatalytic coating for corrosion mitigation in 304LSS of dry storage canisters

Scanning with Laser Beam over the TiO2 Nanotubes Covered with Thin Chromium Layers towards the Activation of the Material under the Visible Light

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Product

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Substrate-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry of Some Small Biomolecules Using TiO₂-Nanotubes: The Effect of Nanotube Diameter and Salt Addition

Substrate-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry of Some Small Biomolecules Using TiO₂-Nanotubes: The Effect of Nanotube Diameter and Salt Addition