Among the different techniques of reactive sputtering, the bipolar and high power impulse magnetron sputtering are growing in interest for the thin films research community. However, the combination of both processes in presence of a reactive atmosphere is extremely complex and the role of the s...

The CrN films were grown by rf-magnetron sputtering using a dynamic glancing angle deposition technique. In this technique, the substrate oscillates in front of the sputtering target with an angular amplitude and frequency commanded by a Programmable Logic Controller.The purpose of this paper is...

Photocatalytic degradation of environmental pollutants by using semiconductor-based photocatalysts offers great potential for remediation of toxic chemicals. For an economical and eco-friendly method to eliminate hexavalent chromium (Cr(VI)), favourable catalysts own high efficiency, stability a...

As robust polymeric catalysts, graphitic carbon nitride (g-C3N4) has been known to have great application potential in environmental remediation. However, the mechanisms in the photo-assisted catalytic processes during the reduction or oxidation of pollutants are still difficult to discern and t...

In this study, the synergistic redox conversion of As(III) and Cr(VI) in acidic media was efficiently achieved with a graphitic carbon nitride (g-C3N4) based photocatalyst material (with pyromellitic diimide doping) under visible light irradiation. The non-adsorptive nature of As(V) on the g-C3N...

Single crystals as large as 2 mm of binary transition metal and uranium arsenides and antimonides can be grown from the reactions of titanium, chromium, zirconium, hafnium, tantalum, rhenium, or uranium with alkali metal arsenides and antimonides from 500°C to 950°C. Single crystals of the ter...

First investigations of photoacoustic (PA) spectroscopy (PAS) of methane using an antimonide semiconductor laser are reported. The laser fabrication is made in two steps. The structure is firstly grown by molecular beam epitaxy, then a metallic distributed-feedback (DFB) grating is processed. Th...

To develop highly efficient non-noble-metal electrocatalysts for oxygen evolution reaction is still a great challenge. Herein, cobalt and iron oxide with hollow structure has been fabricated using ZIF-67 as template, via reflux process followed by calcination. The simultaneous structural and ele...

Oxygen evolution reaction (OER) plays a vital role in green technologies including water splitting and carbon dioxide reduction. As promising alternatives of noble metals–based OER electrocatalysts such as IrO2 and RuO2, the OER performance of nanostructured Co-based materials is far from satis...

Simple-controlled synthesis of multiple porous and monodisperse cobalt-iron oxides were realized by varying the prepared conditions via a template-assisted glycol solvothermal process. The obtained materials were characterized by X-ray diffraction, transmission electron microscopy, scanning elec...

Novel bioactive calcium titanate–tricalcium phosphate–tetracalcium phosphate composite coatings were developed. Powder mixtures of hydroxyapatite and 25, 50 and 75 vol% of calcium titanate were uniaxially pressed and sintered at 1100–1200 °C for 4 h. After heat treatment, the composites, whi...

Biocompatibility is one of the biggest challenges for biomaterials development. This issue arises in the case of coatings. Calcium phosphate (CP) coatings are currently used to cover femoral stem implants, while calcium titanate (CT) has also been proposed as a coating for biomedical application...

A metallurgical material integration concept, using porous calcium titanate (CaTiO3) as raw material, was put forward for preparation of metallic titanium powder and porous titanium by calciothermic reduction. Porous metallic titanium was prepared by calcium vapor reduction at 1273 K for 6 h wit...

The surface-inspirable biomaterials have captured extensive attention in simulating microenvironments by mimicking nanoscale architectures and signal molecules in the extracellular matrix (ECM). To activate osteogenic differentiation through biomimetic nanostructures, osteoid-like calcium titana...

A reduction of bismuth oxide in hydrogen atmosphere was investigated. The reaction was performed with a material in various structural forms: powder: with micrometric grains, powder with nanometric grains and powder pressed into pellets. The process was performed in both isothermal and non-isoth...

Molybdenum-based catalysts for the gas-phase oxidation of propylene with air were investigated. Various types of silica-supported molybdenum oxide and molybdenum-bismuth mixed oxide catalysts were prepared from inorganic and organometallic molybdenum precursors using wet impregnation and physica...

The time of flight secondary ion mass spectroscopy (ToF-SIMS) technique was employed to investigate the interaction of liquid lead-bismuth eutectic (LBE) atoms with the surface and subsurface of a T91 steel taking into account the contribution of plastic deformation. It is shown that both Pb and...

Molybdenum (Mo)-doped bismuth vanadium oxide (BiVO4) powders were prepared by a sol–gel method. X-ray diffraction (XRD) patterns and micro-Raman vibrational bands confirm the monoclinic scheelite phase. Molybdenum doping of BiVO4 matrix was confirmed from XRD by higher angle 2θ shift of the ch...

High-quality, large single crystals of ternary bismuth molybdenum oxides have been prepared by the electrolysis of molten K2CO3–Bi2O3–MoO3 systems, in which K2CO3 is present as a fluxing medium. The unit-cell parameters and the compositions were determined by using X-ray diffraction and fluore...

This study investigates the photocatalytic nitrogen fixation on a cation-doped surface (BixMy)2MoO6 where (M = Fe, La, Yb) in both the orthorhombic and monoclinic configurations using a density functional theory (DFT) approach with experimentally validated model inputs. The proceeding discussion...