Materials Literature
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K2NiF4-type Pr2NiO4 doped with Cu, Cu–Ga, or Co (Pr2Ni0.9Cu0.1O4, Pr2Ni0.75Cu0.25O4, Pr1.91Ni0.71Cu0.24Ga0.05O4, or Pr2Ni0.9Co0.1O4) were synthesized by a solid-state reaction for use as cathodes in an intermediate-temperature (500–700°C) solid oxide fuel cell (IT-SOFC). Pr2NiO4, Pr2Ni0.9Cu0.1O4, Pr2Ni0.75Cu0.25O4, Pr…
The effect of P, ranging from 0.0 to 0.10 mass%, on the core losses of electrical steels containing 2.0 mass% silicon has been investigated. The core losses were separated into hysteresis losses, classical eddy current losses and anomalous losses. The hysteresis losses were found to decrease with increasing P content…
In our study, graphene oxide is synthesized by Hummers method. And then, carboxylic acid functionalized graphene (graphene-COOH), thiol-functionalized graphene (graphene-SH), and highly dispersive graphene are prepared by chemical modification of respective groups on the graphene surface. Furthermore, we explore a sol…
CeO2 nanobelts, nanorods and nanowires have been synthesized by a formaldehyde-assisted hydrothermal system. It is found that the morphologies of these one-dimensional (1D) CeO2 nanomaterials are dependent on the components of the corresponding precursors, which is achieved to control the reaction degree of Cannizzaro…
We report on the electronic structure of Ge(9)[Si(SiMe(3))(3)](3)(-). Systematic density functional theory analysis of the electronic shell structure of the cluster and its derivatives reveals that the Ge(9)[Si(SiMe(3))(3)](3)(-) and its neutral counterpart have electronic shells that can be explained using the supera…
Single-crystal nanosheets of magnesium hydroxide were electrodeposited from aqueous magnesium nitrate solution. SAED and in-situ dehydration study confirmed that the single-crystal Mg(OH) 2 nanosheets were grown with their {011} planes for the first time. The average transmittance of the porous Mg(OH) 2 films deposite…
X-ray diffraction studies showed that the structure of (Sr1−xPrx)TiO3 solid solutions at 300 K changes from the cubic Pm3m to the tetragonal I4/mcm with increasing x. The analysis of XANES and EXAFS spectra of the solid solutions revealed that Pr ions are predominantly in the 3+ oxidation state, they substitute for Sr…
In this paper a series of polyurethane (PU) membranes modified by zinc oxide nanoparticles was prepared. The samples were synthesized from 1,6-hexamethylene diisocyanate (HDI), a mixture of polyesters consisting of poly(1,4-butylene adipate) diol (PBA, M 2000) and polycaprolactone diol (PCL, M 2000), dimethylolpropion…
The inhibition efficiency (IE) of Polyacrylamide (PAA) in controlling corrosion of carbon steel in ground water in the absence and presence of Zn 2+ has been evaluated by weight loss method. The formulation consisting of 250 ppm PAA and 50 ppm Zn 2+ has 98% IE. It is found that the inhibition efficiency (IE) of PAA in…
Translocation of a lead cation from the N-core of a porphyrin to a hanging carboxylate group is coupled to a transmetalation process with a second lead cation, leading to a dinuclear species. A novel hanging-atop coordination mode is responsible for the dynamic and stereocontrolled binding of lead to the porphyrin cor…
Amphiphilic polymer surfactants are composed of hydrophilic and hydrophobic polymers and are widely used in targeted drug delivery. The purpose of this study was the evaluation of the effect of molecular weight and molar ratio of dextran on physicochemical properties of dextran stearate polymeric micelles. Dextran ste…
O potássio é um dos principais macronutrientes presentes no solo. Entretanto, no Brasil este se torna escasso devido à elevada acidez dos solos tropicais. Dessa forma, a demanda por fontes alternativas de potássio cresce consideravelmente. Nesse contexto, foi realizada a caracterização química e mineralógica do verdet…
The formation of boronic esters lowers the LUMO energy of hexamethoxytriphenylene by ∼1 V, converting the discotic core archetype from electron-rich to electron-deficient. Cyclic voltammetry gives E1/2 reduction values (ca. −1.2 V vs. Fc/Fc+) that are comparable to that of C60, the standard electron acceptor in organi…
Porous TiO 2 nanofibers were prepared via a facile electrospinning method. The carbon nanospheres were mixed with the ethanol solution containing both poly(vinylpyrrolidone) and titanium tetraisopropoxide for electrospinning; and subsequent calcination of as‐spun nanofibers led to thermal decomposition of carbon nanos…
The structural and elastic properties of anhydrous calcium oxalate [COA, Ca(C2O4)] and calcium oxalate monohydrate [COM, Ca(C2O4)·H2O] have been studied by first-principles and interatomic potential calculations. Density functional theory calculations of the structures of COA and COM using a semi-empirical addition of…
The effect of equal-channel angular pressing (ECAP) on the pitting corrosion of pure Al was investigated using electrochemical techniques in solutions containing 0.1 m mol·dm −3 of Na 2 SO 4 and 8.46 mol·dm −3 of NaCl (300 ppm Cl − ) and followed by surface analysis. The potential for pitting corrosion of pure Al was…
Nanomaterials are at the leading edge of the rapidly developing field of nanotechnology. The authors investigated biosynthesis of gold nanoparticles using the fungus Phoma macrostoma. Intracellular biosynthesis of gold nanoparticles was obtained by incubating HAuCl4 solution with the fungal biomass for 48 h. The gold…
Self-assembling biological materials increasingly serve as templates for the binding of inorganic materials and fabrication of composite nanowires, tubes, etc. with important applications in nanobiotechnology. We have previously reported the use of a self-assembling octapeptide building block as scaffold for the syste…
Periodically stacked graphene and its insulating isomorph provide a fascinating structural element in implementing highly functional superlattices at the atomic scale, which offers possibilities in designing nanoelectronic and photonic devices. Using density functional theory (DFT) calculations, we demonstrate that va…
Co 3 O 4 spinel type nanoparticles (5–10 nm) were synthesized by oxidizing precipitation in various basic solutions. The materials prepared in lithium-containing hydroxide solutions exhibit high electronic conductivity (higher than 10 −2 S.cm −1 at room temperature), which can be increased (up to 3 S.cm −1 ) by electr…