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Band alignment at interfaces of two-dimensional materials: internal photoemission analysis KU Leuven

Valeri Afanasiev, Gilles Delie, Michel Houssa, Ilya Shlyakhov, Andre Stesmans, Vadim Trepalin
The article overviews experimental results obtained by applying internal photoemission (IPE) spectroscopy methods to characterize electron states in single- or few-monolayer thick two-dimensional materials and at their interfaces. Several conducting (graphene) and semiconducting (transitional metal dichalcogenides MoS2, WS2, MoSe2, and WSe2) films on top of thermal SiO2have been analyzed by IPE, which reveals significant sensitivity of interface ...

Effect of microstructural defects on passive layer properties of interstitial free (IF) ferritic steels in alkaline environment Vrije Universiteit Brussel

A Yilmaz, K Traka, Sven Pletincx, Tom Hauffman, J. Sietsma, Yaiza Gonzalez-Garcia

The role of microstructural defects (dislocation density and grain boundary areas) on the passive film properties formed on cold- and hot-rolled interstitial free (IF) steels is investigated in 0.1 M NaOH solution. Electron backscattered diffraction (EBSD) shows higher microstructural defect density on cold-rolled samples. Potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) results exhibit the lower barrier ...

Unravelling the Fe Effect on the Corrosion of Chromium Coatings: Chemical Composition and Semiconducting Properties Vrije Universiteit Brussel

Mony J de Leon, Sven Pletincx, Herman Terryn, B. Ozkaya, E. Garcia-Lecina, J. M. Vega

A model trivalent chromium-based electroplating bath doped with different concentrations of Fe was used to obtain different metallic coatings. The impact of the Fe was investigated on both the Cr layer and its native passive film by a detailed characterisation using X-ray Photoelectron Spectroscopy (XPS), Angle Resolved XPS and Auger Electron Spectroscopy. Moreover, the semiconducting properties of their oxide layers were explored by ...

In-depth investigation and versatile kinetic modeling of adsorption and degradation processes in liquid and gas phase photocatalytic environmental remediation Ghent University

Alireza Ranjbari
Photocatalysis stands out as a promising method for treating pollutants in both water and air, gaining significant attention in recent years. This technology involves the activation of heterogeneous photocatalysts by photon energy, leading to the generation of reactive oxygen species capable of degrading pollutants. To enhance our understanding of the intricate mechanisms governing photocatalysis and enable predictions of system behavior under ...

Role of phosphate, calcium species and hydrogen peroxide on albumin protein adsorption on surface oxide of Ti6Al4V alloy Vrije Universiteit Brussel

Ehsan Rahimi, Ruben Offoiach, Kitty Baert, Herman Terryn, Maria Lekka, Lorenzo Fedrizzi

Protein adsorption and its conformational arrangements on the surface of metallic biomaterials directly influence the biocompatibility and the degradation process during the implant lifetime. However, the presence of various species such as phosphates, calcium and hydrogen peroxide (H2O2) in the human body not only control the electrochemical interactions on the biomaterial surface but could also modify the protein adsorption process and its ...

A comprehensive electrochemical evaluation of the corrosion inhibition by sodium silicate on carbon steel Ghent University

Elias De Ketelaere, David Moed, Tom Depover
Sodium silicate (SS) is investigated as a sustainable green corrosion inhibitor for carbon steel in saline environment under both static and dynamic flow conditions. Potentiodynamic scans and Electrochemical Impedance Spectroscopy revealed that silica is both highly efficient in static and flowing water conditions (up to 98 and 99% resp.). An increased inhibition efficiency (IE) is seen as a function of silica concentration as a result of ...

Probing the flat band potential and effective electronic carrier density in vertically aligned nitrogen doped diamond nanorods via electrochemical method Hasselt University

Gourav Bhattacharya, Sankaran KAMATCHI JOTHIRAMALINGAM, Shashi B. Srivastava, Joseph Palathinkal Thomas, Sujit Deshmukh, Paulius POBEDINSKAS, Samarendra P. Singh, Kam Tong Leung, Marlies VAN BAEL, Ken HAENEN, et al.
One-dimensional diamond nanorods (DNRs) were fabricated from nanocrystalline diamond films using a facile combination of microwave plasma enhanced chemical vapor deposition and reactive ion etching (RIE) techniques. Structural and electrochemical properties of undoped and nitrogen doped DNRs were thoroughly investigated. A cyclic voltammetry study revealed the increase in density of charge carriers when doped with nitrogen. Mott Schottky ...

Understanding the roles of variable Pd(II)/Pd(0) ratio supported on conjugated poly-azobenzene network : from characteristic alteration in properties to their cooperation towards visible-light-induced selective hydrogenation Ghent University

Ipsita Nath, Jeet Chakraborty, Gaoke Zhang, Cheng Chen, Somboon Chaemchuen, Francis Verpoort
Selective hydrogenation of organic functionalities at environmentally benign conditions using visible light is of great industrial and economic significance. Herein we report visible-light-induced rapid, almost quantitative and selective hydrogenation of olefins to respective mono-reduced products using cooperative performance of Pd(0) nanoparticles (NPs) and Pd(II) ions evenly distributed on a newly synthesized conjugated mesoporous ...