Pulsed spray evaporation chemical vapor deposition (PSE-CVD) was employed for the synthesis of cobalt-based spinel oxide thin films, Co3−xFexO4 with x = 0–1.56. XRD, Raman scattering and FTIR emission spectroscopy show that normal structure retained 0 ≤x≤ 0.65 by selective insertion Fe3+ in octahedral sites. The inversion noticed above this range, whereas Fe2+ first indicated x≥ 1. room-temperature electrical resistivity films controlled between 9 0.007 Ω cm adjustment iron doping...

Tetragonal hausmannite (Mn3O4) was synthesized by pulsed-spray evaporation chemical vapor deposition (PSE-CVD) at moderate temperatures. The thermal properties of the obtained Mn3O4 thin films were evaluated with a newly developed in situ emission FTIR method. performance grown on flexible stainless steel mesh substrates investigated toward oxidation CO and C3H6. X-ray diffraction (XRD) patterns, FTIR, Raman spectroscopy reveal that only single-phase tetragonal spinel structure within...

Hybrid organically bridged silica membranes are suitable for energy-efficient molecular separations under harsh industrial conditions. Such can be useful in organic solvent nanofiltration if they deposited on flexible, porous and large area supports. Here, we report the proof of concept applying an expanding thermal plasma to synthesis perm-selective hybrid films from monomer, 1,2-bis(triethoxysilyl)ethane. This membrane is first its class produced by enhanced chemical vapor deposition. By...

A series of cobalt ferrite thin films was prepared via pulsed spray evaporation chemical vapour deposition (PSE-CVD). The samples were comprehensively characterised in terms structure, surface, morphology, and optical redox properties. Both X-ray diffraction (XRD) Raman analysis show that all exhibited an inverse spinel structure. photoelectron spectroscopy (XPS) results indicate the mainly composed Co, Fe O species, increase Co : ratio with substitution by observed. Helium ion microscopy...

Successful synthesis of a ceramic-supported ultrathin carbon membrane with unprecedently high hydrogen permeance and outstanding H₂/CO₂, H₂/N₂ H₂/CH₄ selectivities at elevated temperatures.

The spinel (Co3O4) and the perovskite (LaCoO3) oxides are two distinct structures that have in common trivalent cobalt cations octahedral sublattice but contrasting interconnection geometries. Several properties directly related to these octahedra, which edge-connected vertex-connected structure. electrical charge transport was investigated both materials explain superior conductivity of despite confirmed high mobility barrier. surface probing indicates higher reducibility spinel, abundance...

The separation performance of a polymeric-supported hybrid silica membrane in the dehydration process butanol–water mixture at 95 °C has been enhanced by applying bias to substrate during plasma deposition.

The incorporation of binary Co–Mn or Co–Cr oxides within the silica matrix leads to formation structures with different networks, which allows tuning gas separation properties.

Abstract Thin films and coatings are a basis for many technological processes, including microelectronics, electrochemistry catalysis. The successful deposition of metal nanoparticles by chemical vapour (CVD) needs control over number physico-chemical processes such as precursor substrate selection, delivery, temperature, pressure flow conditions. Here, cobalt thin were deposited means pulsed-spray evaporation (PSE-CVD) from ethanol solutions Co(acac) 2 3 on bare glass silicon substrates....

The growth of pure-phase perovskites and spinels is reported using pulsed-spray evaporation chemical vapor deposition (CVD). Besides the near-bulk properties 250 nm thick perovskites, an unusual surface confinement charge transport was observed in ultrathin, , polycrystalline films, resulting electrical resistivity that appears to be lower than a single crystal. Using doping strategy as tool tune physicochemical spinel structure cobalt oxide demonstrated, enabling establishment direct...

The discontinuity of the lattice at surface leads to an inherent presence dangling bonds and atomic coordinations that differ from bulk. As a consequence this effect, we report on two-dimensional confinement charge transport polycrystalline perovskite oxide. Studying separately bulk effect was approached by investigation ultrathin stress-free LaCoO3 films are grown amorphous nonconducting substrates using pulsed-spray evaporation chemical vapor deposition. electrical characterization...

The growth of pure phase a number perovskites and spinels is reported using pulsed spray evaporation (PSE) CVD. Beside the near bulk properties 250 nm-thick an unusual confinement charge transport was observed in ultrathin, < 10 nm, polycrystalline LaCoO3 films resulting apparent electrical conductivity that higher than single crystal. In second part this report, doping strategy used as tool to tune spinel structure cobalt oxide, enabling establishment direct correlations between its...

Abstract not Available.

A study was made of the adsorption 5-sulfosalicylic acid and orthophosphate ions from aqueous solutions by two commercially activated carbons. Adsorption isotherms obtenained at 298°K were both Langmuir Freundlich types them capacities calculated. From these results, carbon with a pH=8 adsorbs adsorbates better than other one (pH=7) are adsorbed acid. These results comfirmed theoretical calculations accessible number active sites obtained for It has also been shown that percentage dispersion...