Materials Literature
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Template synthesis of porous carbon materials usually requires selective removal of template silica from the carbon/silica composites. It not only involves waste of valuable chemicals, but also poses significant environmental concerns including high waste treatment cost. Recycling of silicates released from such nanoc…
Ein eingesperrter Katalysator: Aus Edelmetall- und Oxidnanopartikeln können hochtemperaturstabile mesoporöse Nanokolloidkugeln (MMNCSs, siehe Bild) erhalten werden. Die katalytische Aktivität, Selektivität und Thermostabilität der MMNCSs wurde in der Oxidation von Kohlenmonoxid und der Umsetzung von Cyclohexen mit Was…
Due to the inherent viscosity of polymer, piezoelectric response in the thickness direction (d33) of cellular ferroelectret films usually depends on the time of measurement. In this letter, the micromechanical theory of viscoelastic composite was extended to predict the time dependence of the overall piezoelectric d33…
Optical properties of ZnCdO/ZnO single quantum well (SQW) grown on c-sapphire substrate by pulsed laser deposition were investigated. Temperature dependent photoluminescence (PL) measurement was performed from 10 to 300 K to study the carrier localization effect and peak evolution. The LO-phonon replicas up to third o…
In this work, thin film copper vanadium oxide electrodes including Cu3V2O8 and Cu5V2O10 were prepared by an aqueous process for thermal batteries. The electrochemical performances of thin film electrodes were tested and evaluated in thermal cells. Comparing with pressed pellet electrodes, the thin film electrodes were…
In this letter, it is shown that when replacing Ge by Fe in Tb5Si2Ge2 the structural transition still occurs and enhances the magnetocaloric effect (MCE) (up to 66%) with maximum of MCE at a critical Fe amount where the magnetic and structural transitions become fully coupled. It is observed that Fe concentration is a…
Many recent reports on magnetism in otherwise nonmagnetic oxides have demonstrated that nanoparticle size, surfactant coating, or doping with magnetic ions produces room-temperature ferromagnetism. Specifically, ZnO has been argued to be a room-temperature ferromagnet through all three of these methods in various expe…
Sintered [Nd0.45(LarDy1)1/(r+1)*0.55]2.6Fe14B magnets (r = 1 to 3) were studied. Magnetic properties and microstructures of the magnets were investigated by magnetic measurements and electron microprobe analysis. The microstructure of magnets consists of a mixed rare-earth (MRE)2Fe14B (2: 14: 1) phase matrix having a…
In this work, we report a new reversible hydrogen storage composite based on 6LiBH 4 +CaF 2 . It has a theoretical hydrogen capacity of 9.6 wt % (0.09 g·ml −1 ) and a slightly reduced thermodynamic stability compared with pure LiBH 4 . The dehydrogenation of 6LiBH 4 + CaF 2 yielded CaB 6 and a solid solution of LiH an…
An extensive series of experiments have been conducted using a nonthermal plasma generated by dielectric barrier discharge (DBD) process combined with vanadium pentoxide catalyst to reduce the nitrogen oxides (NO x ) from diesel engine exhaust over a broad reaction temperature (100−500 °C). In this system, the effects…
Oriented single crystals of stibioellisite (Tl 3 SbS 3 ), parapierrotite (TlSb 5 S 8 ), weissbergite (TlSbS 2 ), and lorandite (TlAsS 2 ) were investigated by polarized Raman spectroscopy. Whereas stibioellsite shows isolated SbS 3 groups, the rest of the minerals show interconnected pyramidal (As,Sb)S 3 groups. Raman…
We have studied the magnetic field effect on low frequency dielectric properties of Pr0.6Ca0.4MnO3/polyvinylidene fluoride nanocomposite with 22.5% volume fraction of Pr0.6Ca0.4MnO3 nanoparticles. A strong magnetodielectric response was observed below 120 K where Pr0.6Ca0.4MnO3 nanoparticles show the magnetic phase tr…
Two methods for estimation of the surface area and volume of a Williams pear quarter provides the focus of this study. The heat energy needed for the drying process depends, in part, on the surface area. The first method involved multiplying the number of pears by the average surface area or volume. The second method…
The molar quantity of adsorbed CO and H 2 present on the surface of a mixed CuO x -CeO 2 catalyst during CO preferential oxidation in H 2 at 353 K was quantified using both the reactive titration method and the steady-state isotopic-transient kinetic analysis (SSITKA). For the reactive titration method, either CO or H…
Diatoms are unicellular microscopic algae found in practically any moist environment. Identification of diatom has application in many disciplines, including ecology, archaeology and forensic science. In recent years, the work has been undertaken for automatic identification of diatom. However, the diatom with circula…
Electronic transport properties of DyScO3/SrTiO3 polar heterointerface grown at different oxygen pressures are studied. This DyScO3/SrTiO3 polar heterointerface exhibits much higher charge mobility, up to 104 cm2 V−1 s−1, compared to the LaAlO3/SrTiO3 system due to relatively lower lattice mismatch between the film an…
ZnFe 2 O 4 films have been prepared using a sol–gel route. The influences of annealing temperature as well as annealing atmosphere on the structural, morphological, magnetic, and optical properties were investigated. The TEM and SEM images show that ZnFe 2 O 4 films are polycrystalline in nature and homogeneous with d…
Both bacteriopyropheophorbide-a and ring-B reduced pyropheophorbide-a on reacting with NBS (N-bromosuccinamide) undergo electrophilic bromination to provide 10-bromo analogs. The electronic nature of the substituents present at position-3 did not make any difference in the regioselective outcome of the brominated prod…
Abstract Long chain cellulose esters (LCCE) are bio‐based materials, which are biodegradable, can be prepared from renewable materials, and have relatively good mechanical and barrier properties. In this study, we tested the feasibility of various LCCEs as a coating material for paperboard. Cellulose hexanoates (C6) a…
BaAlBO3F2 (BABF), a newly developed nonlinear optical (NLO) crystal, was fully investigated for high-power harmonic generation of UV light. This was performed after successfully growing high-quality single crystals in the LiF–B2O3–NaF flux system. Thermal expansion, specific heat, transmittance spectrum, nonlinear opt…