scholarly journals CoPi/Co(OH)2 Modified Ta3N5 as New Photocatalyst for Photoelectrochemical Cathodic Protection of 304 Stainless Steel

Materials ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 134 ◽  
Author(s):  
Xuan Xie ◽  
Li Liu ◽  
Emeka E. Oguzie ◽  
Ying Li ◽  
Fuhui Wang
Keyword(s):  
Stainless Steel ◽  
Cathodic Protection ◽  
Photoelectron Spectroscopy ◽  
Light Response ◽  
Open Circuit ◽  
304 Stainless Steel ◽  
Nanorod Arrays ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Photocatalytic Material

In this work, CoPi and Co(OH)2 nanoparticles were deposited on the surface of Ta3N5 nanorod-arrays to yield a novel broad-spectrum response photocatalytic material for 304 stainless steel photocatalytic cathodic protection. The Ta3N5 nanorod-arrays were prepared by vapor-phase hydrothermal (VPH) and nitriding processes and characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV-Vis spectroscopy, respectively, to obtain morphologies, crystal structures, surface compositions, and light response range. In order to analyze the performance improvement mechanism of CoPi/Co(OH)2 on Ta3N5 nanorod-arrays, the electrochemical behavior of modified and unmodified Ta3N5 was obtained by measuring the open circuit potential and photocurrent in 3.5 wt% NaCl solution. The results revealed that the modified Ta3N5 material better protects 304 stainless steel at protection potentials reaching −0.45 V.

One-Pot Hydrothermal Synthesis of Sulfur-Doped SnO2 Nanoparticles and their Enhanced Photocatalytic Properties

NANO ◽  
2016 ◽  
Vol 11 (03) ◽  
pp. 1650035 ◽  
Author(s):  
Lin Ma ◽  
Limei Xu ◽  
Xuyao Xu ◽  
Xiaoping Zhou ◽  
Lingling Zhang
Keyword(s):  
Visible Light ◽  
Photoelectron Spectroscopy ◽  
Electrochemical Impedance ◽  
Sno2 Nanoparticles ◽  
Light Response ◽  
One Pot ◽  
X Ray ◽  
Transmission Electron ◽  
Light Region ◽  
Vis Spectroscopy

Sulfur-doped SnO2 nanoparticles with ultrafine sizes have been successfully prepared by a one-pot hydrothermal method. The obtained samples are characterized by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), high resolution transmission electron microscopy (HRTEM), thermogravimetric (TG), analyzer UV-Vis spectroscopy, photoluminescence (PL) and electrochemical impedance spectroscopy (EIS). The experimental results indicate that the doping level of sulfur element as well as the bandgaps of SnO2 can be controlled to a certain extent by varying the amount of L-cysteine (L-cys). When evaluated as photocatalysts in the degradation of rhodamine B (RhB) and reduction of Cr(VI) under visible light region, the resultant sulfur-doped SnO2 nanoparticles demonstrate obviously enhanced photocatalytic activities due to the markedly improved visible light response and effective separation of the photo-generated electron–hole pairs.

X-ray photoelectron spectroscopy studies of hard coatings formed by titanium implantation on 304 stainless steel

1986 ◽  
Vol 141 (1) ◽  
pp. 59-69 ◽  
Author(s):  
M.R Nair ◽  
D.C Kothari ◽  
A.A Rangwala ◽  
K.B Lal ◽  
P.D Prabhawalkar ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Photoelectron Spectroscopy ◽  
Hard Coatings ◽  
304 Stainless Steel ◽  
X Ray ◽  
Spectroscopy Studies

scholarly journals Properties of Thermally Evaporated Titanium Dioxide as an Electron-Selective Contact for Silicon Solar Cells

Energies ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 678 ◽  
Author(s):  
Changhyun Lee ◽  
Soohyun Bae ◽  
HyunJung Park ◽  
Dongjin Choi ◽  
Hoyoung Song ◽  
...  
Keyword(s):  
Solar Cells ◽  
Titanium Oxide ◽  
Photoelectron Spectroscopy ◽  
Oxide Films ◽  
Open Circuit ◽  
Band Alignment ◽  
Silicon Solar Cells ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Titanium Oxide Films

Recently, titanium oxide has been widely investigated as a carrier-selective contact material for silicon solar cells. Herein, titanium oxide films were fabricated via simple deposition methods involving thermal evaporation and oxidation. This study focuses on characterizing an electron-selective passivated contact layer with this oxidized method. Subsequently, the SiO2/TiO2 stack was examined using high-resolution transmission electron microscopy. The phase and chemical composition of the titanium oxide films were analyzed using X-ray diffraction and X-ray photoelectron spectroscopy, respectively. The passivation quality of each layer was confirmed by measuring the carrier lifetime using quasi-steady-state photoconductance, providing an implied open circuit voltage of 644 mV. UV–vis spectroscopy and UV photoelectron spectroscopy analyses demonstrated the band alignment and carrier selectivity of the TiO2 layers. Band offsets of ~0.33 and ~2.6 eV relative to the conduction and valence bands, respectively, were confirmed for titanium oxide and the silicon interface.

scholarly journals Effect of immersion time at the stainless steel 304L/NaCl (0.01 M) interface

2019 ◽  
Vol 9 (2) ◽  
pp. 99-111
Author(s):  
Wejdene Mastouri ◽  
Luc Pichon ◽  
Serguei Martemianov ◽  
Thierry Paillat ◽  
Anthony Thomas
Keyword(s):  
Stainless Steel ◽  
Photoelectron Spectroscopy ◽  
Immersion Time ◽  
Surface Composition ◽  
Electrochemical Impedance ◽  
Open Circuit ◽  
Nacl Solution ◽  
Aisi 304L ◽  
X Ray ◽  
Steel Aisi

Stainless steels are broadly used thanks to their specific physical properties such as their high corrosion resistance in poorly aggressive solutions. However, only few studies have been reported in the literature concerning their electrochemical behavior in low concentration electrolytes medium. Accordingly, the present work aims to study the immersion time influence on the solid-liquid interface properties of the austenitic stainless steel AISI 304L, immersed in a low-concentrated (0.01 M) sodium chloride (NaCl) solution. The electroche­mical behavior of the interface was evaluated by electrochemical impedance spectroscopy (EIS) and open circuit potential (OCP) monitoring. The morphological features and the modification of the surface composition were evaluated by Optic Microscopy, Scanning Electron Microscopy, Energy Dispersive X-ray Spectrometry, Atomic Force Microscopy, White Light Interferometry and X-ray Photoelectron Spectroscopy. It was determined by OCP measurement that the characteristic time of the interface stabilization is very long (several months). After an immersion of 2 months in NaCl solution, a second time constant on impedance phase diagram appears. Surface characterizations reveal a significant modifi­cation of the morphology and chemistry of the AISI 304L surface that can be linked to OCP/EIS observations. It can be noticed that the repeatability deviation of the EIS method was about 1 % while its reproducibility deviation was estimated to 35 %.

Synthesis and Characterization of Eu-Doped SrTiO3 Photocatalytic Materials Using in the Cathodic Protection of 304 Stainless Steel

2019 ◽  
Vol 793 ◽  
pp. 87-91 ◽  
Author(s):  
Zhi Feng Zhang ◽  
Feng Juan Wang ◽  
Wei Sun ◽  
Jin Yang Jiang
Keyword(s):  
Stainless Steel ◽  
Cathodic Protection ◽  
304 Stainless Steel ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
Paper Sample ◽  
X Ray ◽  
Scanning Electron ◽  
The Eu

In this paper, sample of Eu-doped SrTiO3was synthesized using hydrothermal method, in which the Eu (NO3)3and Sr (OH)2were as the Eu and Sr source. X-ray diffraction (XRD), scanning electron microscope (SEM) were used to characterize the structure and ingredient of the as-prepared samples. The results show that high-purity of SrTiO3was prepared and structure of SrTiO3without change with Eu doping. Also, performance of cathodic protection of stainless steel was tested in the photoelectricity cell. Furthermore, the mechanism of the improvement by the rare earth was also detected.

Study on Pitting Corrosion Resistance of Nanocrystallized Bulk 304 Stainless Steel in 0.5mol/L Hydrochloric Acid Solution

2014 ◽  
Vol 487 ◽  
pp. 41-44
Author(s):  
Yan Zhang ◽  
Cun Bo Gong ◽  
Gui Mei Shi ◽  
Sheng Gang Wang
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Austenitic Stainless Steel ◽  
Photoelectron Spectroscopy ◽  
304 Stainless Steel ◽  
X Ray ◽  
Pitting Corrosion Resistance ◽  
304 Austenitic Stainless Steel ◽  
Potentiostatic Polarization ◽  
Hcl Solution

Potentiodynamic and potentiostatic polarization experiments showed that the nanocrystallized bulk 304 stainless steel (nano304SS) exhibited a superior pitting resistance in 0.5 mol/L HCl solution, in comparison to the bulk 304 austenitic stainless steel (304SS). X-ray photoelectron spectroscopy characterization indicated that a passive film was formed on the nano304SS which was richer in Cr and denser than that on the 304SS

An Electrochemical and XPS Investigation of Sputter Deposited Ni44 Fe32Cr11P8B5 on 304 Stainless Steel

1986 ◽  
Vol 80 ◽  
Author(s):  
P. V. Nagarkar ◽  
R. M. Latanision
Keyword(s):  
Stainless Steel ◽  
Photoelectron Spectroscopy ◽  
Corrosion Behaviour ◽  
304 Stainless Steel ◽  
Surface Layers ◽  
X Ray ◽  
Electrochemical Testing ◽  
Sputter Deposited ◽  
Constituent Elements ◽  
Steel Substrates

AbstractAn Ni44 Fe32Cr11P8B5 (at.%) alloy was sputter deposited on to water cooled 304 stainless steel substrates. Electrochemical testing was performed in 0.1N H2So4 with and without the addition of O.06N NaCI. The surface layers of specimens polarized into the active and passive regions of the anodic polarization curves were analyzed using x-ray photoelectron spectroscopy (XPS) to check for preferential dissolution and possible segregation of the constituent elements. A significant improvement in the overall corrosion behaviour of 304 stainless steel was observed due to the sputter deposited layer.

Interaction of Bovine Serum Albumin and Lysozyme with Stainless Steel Studied by Time-of-Flight Secondary Ion Mass Spectrometry and X-ray Photoelectron Spectroscopy

Langmuir ◽  
2012 ◽  
Vol 28 (47) ◽  
pp. 16306-16317 ◽  
Author(s):  
Yolanda S. Hedberg ◽  
Manuela S. Killian ◽  
Eva Blomberg ◽  
Sannakaisa Virtanen ◽  
Patrik Schmuki ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Stainless Steel ◽  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Photoelectron Spectroscopy ◽  
Bovine Serum ◽  
Secondary Ion Mass Spectrometry ◽  
Time Of Flight ◽  
X Ray ◽  
Secondary Ion
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