Adsorption properties of Rosmarinus officinalis oil as green corrosion inhibitors on C38 steel in 0.5M H2SO4
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Drug Release Behavior from Nanoporous Anodic Aluminum Oxide
In this study, we developed a new drug delivery system using anodic oxidation. The growth of a porous oxide layer on aluminum under anodic bias in various electrolytes has been studied for more than 40 years. Anodic Aluminum Oxide (AAO) has many uniform nanopores on its surface. This nanoporous surface can be used for…
Dissolved State of Cellulose in Ionic Liquids - the Impact of Water
The aggregate size of cellulose dissolved in 1-ethyl-3-methylimidazolium acetate (EMIMAc) and 1-butyl-3-methylimidazoluim chloride (BMIMCl) was measured by static and dynamic light scattering. Examined were cellulose solutions containing various amounts of water. The impact of water on the size of cellulose particles…
Effect of Mechanical Milling on Carbothermic Reduction of Magnesia
A mixture of MgO and graphite with a molar ratio (1 : 1) was subjected to planetary ball milling for 1, 2, 4, and 8 h with the intention of enhancing carbothermic reduction reaction of MgO during subsequent thermal treatment. Unmilled and milled mixtures were characterized using a combination of X-ray diffraction (XRD…
Electrochemical oxidation of sugars at moderate potentials catalyzed by Rh porphyrins
In this communication, we demonstrate that certain kinds of Rh porphyrins on carbon black can electrochemically oxidize aldose at low potentials. The onset potential was much lower than those with the other complex-based catalysts. A product analysis suggested that this reaction involves 2-electron oxidation of the al…
Pattern Formation in Anodic Aluminum Oxide Growth by Flow Instability and Dynamic Restabilization
The viscous flow of oxide driven by the electrostriction force during the growth of anodic aluminum oxide is treated by linear stability and scale analysis. A uniform oxide film is unstable to a periodic deformation. The restabilization of pore growth is examined by scale analysis of the steady pore diameter. The patt…
Liquid crystal electropolymerisation under magnetic field and resultant linear polarised electrochromism
The electrochemical preparation of poly(3,4-ethylenedioxythiophene) (PEDOT) is conducted in liquid crystal (LC) electrolyte solution with nematic (N), cholesteric (Ch*), and smectic A (SmA) phases under a magnetic field. The polymer imprints the molecular arrangement of the LC electrolyte during the polymerisation pro…
The Effect of a CGO Barrier Layer on the Performance of LSM/YSZ SOFC Cathodes
Strontium-substituted lanthanum manganite/yttria-stabilized zirconia (LSM/YSZ) solid oxide fuel cell (SOFC) composite electrodes were fabricated with slurry spraying on both sides on either pure YSZ electrolyte foils or YSZ electrolyte foils with a cerium–gadolinium oxide (CGO) barrier layer made by spin coating. Elec…
Large pore phenylene-bridged mesoporous organosilica with bicontinuous cubic Ia3d (KIT-6) mesostructure
Assembly of mesostructured silica using Pluronic P123 triblock copolymer (EO20-PO70-EO20) and n-butanol is a facile synthesis route to the MCM-48-like ordered large mesoporous silicas with the cubic Iad mesostructure, which are designated KIT-6. This synthesis route has been successfully extended to phenylene-bridged…
Calcium bentonite as reinforcing nanofiller for thermoplastic starch
Glycerol-plasticized corn starch materials (TPS), reinforced with calcium bentonite, were prepared by melt extrusion. Scanning electron microscopy was used to visualize extrudates morphology. The effects of clay content and of glycerol content on physical properties of extrudates were evaluated. As determined by X-ray…
Corrosion resistance improvement of titanium base alloys
The corrosion resistance of the new Ti-6Al-4V-1Zr alloy in comparison with ternary Ti-6Al-4V alloy in Ringer-Brown solution and artificial Carter-Brugirard saliva of different pH values was studied. In Ringer-Brown solution, the new alloy presented an improvement of all electrochemical parameters due to the alloying w…
Simulation of a Tubular Solid Oxide Fuel Cell Stack Operating on Biomass Syngas Using Aspen Plus
A tubular solid oxide fuel cell stack was modeled, and its operation on biomass syngas was investigated. The objective of this work was to develop a computer simulation model of a biomass gasification–solid oxide fuel cell system capable of predicting performance under various operating conditions and using diverse fu…
Molecular recognition of N-protected dipeptides by pseudopeptidic macrocycles: a comparative study of the supramolecular complexes by ESI-MS and NMR
The molecular recognition properties of pseudopeptidic macrocycles have been studied by ESI-MS and NMR spectroscopy, as highly complementary experimental techniques in solution and in the gas phase. We used ESI-MS competition experiments for the high throughput screening of the supramolecular interaction between four…
Unravelling the atomic structure of cross-linked (1 × 2) TiO2(110)
The cross-linked (1 × 2) reconstruction of TiO(2)(110) is a frequently observed phase reflecting the surface structure of titania in a significantly reduced state. Here we resolve the atomic scale structure of the cross-linked (1 × 2) phase with dynamic scanning force microscopy operated in the non-contact mode (NC-AF…
Elaborate control over the morphology and structure of mercapto-functionalized mesoporous silicas as multipurpose carriers
In this article, mercapto-functionalized helical mesoporous silica nanorods have been synthesized by a one-step co-condensation of tetraethoxysilane (TEOS) and 3-mercaptopropyltrimethoxysilane (MPTS) using cetyltrimethylammonium bromide (CTAB) as a template. Process parameters, including MPTS concentration, stirring t…
Alternative metal grid structures formed by [M(terpy)2]2+ and [M(terpyOH)2]2+ complexes with small and large tetrahedral dianions, and by [Ru(terpy)2]0
Terpy embraces (TE) are intermolecular motifs involving metal complexes of the type [M(terpy)2]2+ (terpy = 2,2′:6′,2″-terpyridine), based on concerted offset-face-to-face (OFF) and edge-to-face (EF) interactions between pyridyl rings. These embraces are well known to occur as extended two-dimensional grid motifs in cr…
Interphase exchange and diffusion of oxygen in lanthanum-strontium cobaltites doped with iron
Oxides La0.4Sr0.6Co1 − x Fe x O3 − δ (x = 0.2 and 0.4) were synthesized by the ceramic technology. The kinetics of exchange and diffusion of oxygen in these oxides were studied by the isotopic exchange method over the temperature range 600–900°C at an oxygen pressure of 10 torr. The temperature dependences of interpha…
Nanomanufacturing of continuous composite nanofibers with confinement-induced morphologies
Continuous core-shell nanofibers with poly(isoprene-block-dimethylaminoethyl methacrylate) (PI-b-PDMAEMA) block copolymer/polymer derived ceramic (PDC) precursor nanocomposites as cores enveloped in rigid polyacrylonitrile (PAN) shells were nanomanufactured using coaxial electrospinning. The cylindrical confinement im…
Europium(iii)-doped liquid-crystalline physical gels
A red-emitting molecular europium(III) complex has been doped into liquid-crystalline (LC) physical gels consisting of 4-pentyl-4′-cyanobiphenyl (5CB) with amino acid-based gelators. Light scattering cells on the basis of these LC physical gels could be switched between a non-transparent off-state and a transparent on…
Novel preparation of polyphosphazene-coated carbon nanotubes as a Pt catalyst support
This study reports a noncovalent functionalization of MWCNTs with a fluorinated cross-linked polymer coating of poly[cyclotriphosphazene-co-(4,4'-(hexafluoroisopropylidene)diphenol)] and their application as the support of Pt for electrocatalytic oxidation of methanol.