Materials Literature
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A novel CrAPO-5 material having a unique microporous–mesoporous hierarchical pore structure (CrAPO-5H) was synthesized using an organosilane surfactant to conventional CrAPO-5 reaction mixture by a one-step hydrothermal process. The materials were characterized by X-ray diffraction (XRD), scanning electron microscopy…
Soret band lifetimes of the free-base tetraphenylporphine (H(2)TPP) and Cu(ii) tetraphenylporphine (Cu(II)TPP) at 408 nm have been directly measured with femtosecond (fs) resolution using the fluorescence-upconversion technique for the first time, giving tau = 68 +/- 15 and 63 +/- 15 fs, respectively, in benzene solve…
Porous ceramics based on refractory double oxides are promising for light-weight structural components and high-temperature filter materials. In this study, porous MgTi2O5 ceramics with pseudobrookite-type structure have been prepared by in situ processing (viz. reactive sintering). High-temperature XRD revealed the i…
X-ray diffraction data have been collected in situ for a series of magnesium silicate liquids between and including the two mineral compositions enstatite and forsterite (MgSiO 3 and Mg 2 SiO 4 ). The pair distribution functions obtained from these data show that the local oxygen environment around the magnesium ions…
Two-dimensional SnSBA-15(CVD) catalyst was synthesized by the chemical vapor deposition (CVD) method using calcined SBA-15 with anhydrous tin(IV) chloride. For comparison studies, two mesoporous tin silicate catalysts, Sn/SBA-15(SC) and Sn/SBA-15(SA) were synthesized under the incipient wetness impregnation (IWI) meth…
Three new isostructural tellurides Tl4MTe4 with M = Zr and Hf were prepared from the constituent elements. Single crystal X-ray diffraction data analyses showed that these compounds belong to a new structure type, adopting the space group R with the unit cell dimensions of a = 14.6000(5) Å and c = 14.189(1) Å when M =…
This paper deals with error estimates for space-time discretizations in the context of evolutionary variational inequalities of rate-independent type. After introducing a general abstract evolution problem, we address a fully discrete approximation and provide a priori error estimates. The application of the abstract…
The surface of high-performance poly(ethylene terephthalate) (PET) fibers is difficult to wet and impossible to chemically bond to different matrices. Sizing applied on the fiber surface usually improves fiber wetting, but prevents good adhesion between a matrix and the fiber surface. The present study demonstrates th…
Cu/Ce1−xZrxO2 (x = 0-1) was prepared by a coprecipitation-decomposition method using NH3 · H2O as precipitant (to avoid residues of alkali metals), followed by a boiling process to eliminate NH3 and decompose [Cu(NH3)4]2 + complex. Then Cs was introduced to Cu/Ce1−xZrxO2 by the impregnation method. The prepared CsCu/C…
Epitaxial thin films of multiferroic BiFeO3 (BFO) are successfully grown on (100) SrTiO3 substrates using a hydrothermal synthesis method at 120–200 °C in a relatively short time of 2–8 h. It is found that the morphology evolution of the (001)PC-oriented BFO films over time and temperature involve unique dissolution–r…
The behaviour of hydrogen in both defect free and acceptor doped bulk rutile TiO2 is investigated through defect calculations performed within the density functional theory formalism. Both interstitial and substitutional hydrogen defects are shown to behave as shallow donors in the material, thereby existing as effect…
Surface plasmon resonance (SPR) was observed when a planar close-packed assembly of gold nanoparticles (Au NPs) is adsorbed at the water|1,2-dichloroethane interface. Aqueous gold nanoparticles, 13 or 16 nm in diameter, are deposited at the interface by adding methanol to form a close-packed film with a visible gold m…
The electrochemically tailored degradation of polyelectrolyte assemblies holds great promises for the design of inexpensive, easily prepared and precise controlled release systems. However, the conception of such electrochemically responsive platforms for drug or gene delivery requires a detailed understanding of the…
Porosity over a broad range (typically 0.001–300 μm in diameter) of tissue scaffolds provides appropriate conditions for diffusion and adsorption of small molecules and macromolecules, migration of cells through the scaffold, and adequate cell proliferative capacity. Characterisation of pores over this large range pos…
A set of CaO samples was prepared from thermal decomposition of several precursors, leading to very different surface properties. During storage, CaO samples rehydrated quickly but reversibly. Before characterization, the samples were pre-treated at 1023 K under nitrogen flow to obtain CaO as the active phase. Althoug…
This article describes a new simple approach to produce poly(divinylbenzene) and carbon micrometre-sized magnetic composite particles of narrow size distribution. For this purpose, uniform porous poly(divinylbenzene) microspheres were prepared by a single-step swelling of uniform polystyrene microspheres with divinylb…
A series of new Ag–Ln coordination polymers [LnAg5(bdc)4]n (Ln = Eu (1); Yb (2); Er (3); Ho (4); H2bdc = 1,2-benzenedicarbolylic acid) has been synthesized by a hydrothermal method and characterized by single-crystal X-ray diffraction, elemental analysis, thermogravimetric analysis, IR spectra, UV-Vis-NIR absorption s…
This review aims at reporting on very recent developments in the, properties and applications of Green Composites. One very important aspect of green composites is that they can be designed and tailored to meet different requirements. Recent advances in natural fiber development offer significant oppurtunities for imp…
Colloidal CeO2 nanoparticles (HNPs) stabilized with a decanoic fatty acid self-assembled monolayer (SAM) (decHNPs) showed very good dispersibility, i.e., perfect dispersion in cyclohexane up to 20 wt%. However, the HNPs stabilized with a dodecanoic acid SAM (dodHNPs) did not show good dispersion, i.e., at most 0.2 wt%…
The α+β type Ti-5.5Al-2Fe and β type Ti-2.5Fe-2Mn-2Zr alloys have been theoretically designed, for the modification of Ti-6Al-4V and the achievement of the high tensile strength more than 1000 MPa at the solution treatment state, respectively, using ubiquitous alloying elements in order to establish the strategic meth…