In this work, it is proposed a novel strategy to increase the photostability of ZnO photoelectrocatalyst under prolonged light irradiation, without addition or deposition metals and/or semiconductor oxides during their synthesis. This based on use mixed metal oxide (MMO-Ru0.3Ti0.7O2) coating as substrate for electrodeposition ZnO. To assess it, films Ti and Ti/MMO substrates photoelectrocatalyt...

-Iron nI for Ti TM substitution in the structure of pedogenic and synthetic anatase of up to Fe/ (Ti+Fe) 0.1 mol/mol was indicated by an increase in unit cell size as measured by XRD line shifts. MiSssbauerand electron paramagnetic resonance spectra at both, 298 K and 4.2 K supported this by the presence of signals typical for octahedrally coordinated Fe I11 in a diamagnetic matrix. Charge comp...

The crystal structure and d.c. electrical conductivity of a series of homogeneous mixed rare-earth oxides in LnPrO3+y (Ln=Y and lanthanide ion) system are reported. It is found that the ionic size of Ln determines the crystal structure of the oxides in this series. LaPrO3+y and CePrO3+y crystallise in the fluorite structure(fcc), whereas the remaining oxides adopt the C-type rare-earth oxide st...

The interaction of TiOx with SiO2/Mo(112) has been studied using high-resolution electron energy loss spectroscopy, Auger electron spectroscopy, low-energy electron diffraction, and molecular adsorption. Ti at varying coverages was deposited onto a SiO2/Mo(112) surface followed by oxidation at 600K and annealing at various temperatures. TiOx disperses and covers the SiO2 surface after oxidation...

For the deposition of hard layers on hard metals from the gas phase in the systems Ti-C-B, Ti-N-B, Ti-V-C-0, Ti-Zr-C, Ti-C-N, Ti-C, B-C and Si-C at selected deposition conditions the existence of oscillations was established, which result in a lamellar structure of the layers. As shown by Auger-Spectroscopic analyses the composition of the lamellas changes alternately. Reasons for the lamellar ...

In this work we investigate the effect of iron oxide embedded in silica matrices as a function of Fe/Si molar ratio and sol pH. To achieve homogeneous dispersion of iron oxide particles, iron nitrate nonahydrate was dissolved in hydrogen peroxide and was mixed with tetraethyl orthosilicate and ethanol in a sol-gel synthesis method. Increasing the calcination temperature led to a reduction in su...

The aim of this study was to evaluate the bone tissue response to strontium- and silicon-substituted apatite (Sr-HA and Si-HA) modified titanium (Ti) implants. Sr-HA, Si-HA and HA were grown on thermally oxidized Ti implants by a biomimetic process. Oxidized implants were used as controls. Surface properties, i.e. chemical composition, surface thickness, morphology/pore characteristics, crystal...

The effects of F? concentration, leaching temperature, and time on the Ti from Ti-bearing electric furnace slag (TEFS) by [NH4+]-[F?] solution process was investigated to reveal mechanism kinetics titanium. results indicated that rate obviously increased with increase temperature concentration. kinetic equation obtained, activation energy 52.30 kJ/mol. fitting equations calculated values both T...

xi=x̄i when ‖∇xif(x̄)‖2 ≤ λBi, it follows that x̄i = x̄i if and only if ‖∇xif(x̄)‖2 ≤ λBi. Hence, hi(x̄ ∗ i ) = 0. Case 2: Suppose that i ∈ Ic := N \ I, i.e., ‖∇xif(x̄)‖2 > λBi. In this case, x̄i 6= x̄i. From the first-order optimality condition, we have ∇xif(x̄) + Li(x̄i − x̄i) + λBi x̄ ∗ i −x̄i ‖x̄i −x̄i‖2 = 0. Let si := x̄∗i −x̄i ‖x̄i −x̄i‖2 and ti := ‖x̄i − x̄i‖2, then si = −∇xif(x̄) Liti+λBi . Since ‖si‖2 = 1, i...