Search results

Introduction Nanosized zeolite is widely applied in catalysis, adsorption, and building blocks to fabricate hierarchical porous structures due to its higher external surface area, more surface active center, shorter pore pathway and intracrystalline diffusion rate [1-2].
These patterns indicate that the synthesized samples have the structure of zeolite Y without any other phases.
Hierarchical porous structures by using zeolite nanocrystals as building blocks.
Sol-gel chemistry and molecular sieve synthesis.

Such non-stoichiometric oxides with the pervoskite structure containing manganese ions with different oxidation states are the objects of scrutiny in connection with the phenomenon of colossal magnetoresistance, and the prospects of their use in electrochemical and catalytic applications.
The corresponding effect can be used in the examination of the structure and energy states of atoms during mechanical activation.
This effect can be used for the examination of the structure and energy states of atoms in nano-sized mechanically activated powders. 2.
Vykhodets: Advances in Quantum Chemistry Vol. 44 (2003), p. 497

Production of Activated Carbon from Moldy Damaged Tamarind-Pod Piyarut Moonsri 1,a*, Wilaiporn Pongpian 1,b, Kristiya Moonsri2,c 1 Department of Chemistry, Faculty of Science and Technology, Phetchabun Rajabhat University, Phetchabun 67000, Thailand. 2 Department of Management, Faculty of Social Science, Phetchabun Rajabhat University, Phetchabun 67000, Thailand.
From the photographs, the AC derived from the tamarind pod (activation by H3PO4) showed open micro-porous structure and many holes on the carbon surface with broken edges (Fig.2 (a)-(b)).
(a) (b) (c) Fig. 2 SEM images of (a) microstructure of the AC derived from the tamarind pod (b) open micro-porous structure and many holes on the carbon surface and (c) the surface of commercial activated carbon (derived from coconut shell).
EI-Hendawy, Influence of HNO3 oxidation on the structured and adsorptive properties of corncob activated carbon, Carbon. 41 (2003) 713-722

The measured concentrations correlate with the theoretical chemical structure.
This effect could be explained by inorganic structural chemistry.
The matrix consisted of an oxide, which was easily attackable than tightly packed structures like spinels or garnets.
The doped element Eu was located on the lattice sites of Y and was more strongly bound in the structure than Y due to its higher ionic radius (98 pm Eu(III), 112 pm Eu(II), 93 pm Y(III)) [14].

In this structure, the band gap of the ore is littler than the band gap of the shell, just as the band gap value of the center falls inside the band gap value of the shell (like CdSe/CdS, CdSe/ZnS, and InP/ ZnS [13].
Optical properties are achieved using spectrophotometers, structure analysis is done using X-ray diffraction, EDX spectra, TEM, and a solar module analyzer is used to investigate the I-V characteristics for the solar cells under test.
Table (1): The parameters obtained from x-ray diffraction pattern are: the FWHM, the spacing between atoms, the grain size, and the diffraction planes for CdSe/CdS nanoparticles Which indicates that the crystal is cubic phase structure. 2Ɵ(degree) FWHM (degree) dhkl C.S(nm) hkl 25.75 6.51 3.456976 1.251793 111 43.05 3.41 2.099441 2.504364 220 50.25 2.25 1.814202 3.899778 311 EDX spectra of CdSe/CdS Qds Fig. (5) presents energy dispersive spectra of CdSe/CdS nanoparticles which declares the chemical purity and the samples stoichiometry.
Physical Chemistry Chemical Physics, 11(47), 11081. (2009)

Falter3 , B.Holzapfel3,c, J.Engell4 , M.Bäcker 5 , I.Van Driessche 1 1Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281, 9000 Gent, Belgium 2Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ, United Kingdom 3Department of Superconducting Materials, Institute for Metallic Materials, Leibniz-Institute for Solid State Research, Helmholtzstrasse 20,01069 Dresden, Germany 4PF&U, Kullinggade 31, 5700 Svendborg, Denmark 5Trithor Ltd, Heisenbergstrasse 16, 53359 Rheinbach, Germany aveerle.cloet@ugent.be, bbag10@cam.ac.uk, cb.holzapfel@ifw-dresden.de Keywords: Ink-Jet Printing technique, Sol-gel, coated conductors, buffer layers Abstract In this present work, two buffer layers (La2Zr2O7 and CeO2) were deposited by a non-contact computer-controlled ink-jet coating technique with sol-gel precursors on highly textured Ni-5%W Rolling Assisted Biaxially Textured substrates
In order to make transmission cables of YBCO, thin layers of the superconductor must be deposited onto a buffered metallic substrate- this layered structure is called a coated conductor (CC).
Moreover, with ink-jet printing it is possible to make multi-filamentary structures, which reduces AC losses in electric applications.
Pole figures of the buffer layers suggest good texture, but Reflection High-Energy Electron Diffraction (RHEED) analysis of the NiW-LZO-CeO2 structure shows that texture is absent on the surface of the layer.

Attempts to improve the ductility of the alloys by chemistry modifications or microstructural control have shown limited success so far [3-5].
It has been shown that generally very brittle ceramics exhibit a fair degree of ductility at room temperature if they have a nanocrystalline structure [6].
The addition of alloying elements X (X=Ti, Fe and so on) may postpone the formation of extremely fine structure, so that the milling time prior to the explosive reaction is prolonged.
However, the addition of elements such as Fe can weaken the strengthening effect from nanocrystalline structure.

It is, however, noticed that the order parameter(s) in the L10 free energy merely describes the atomic configuration in a crystal and has no clue to the structure of liquid or glass phases.
At the same time, CDCVM opens up a possibility to deal with a topologically disordered structure and the metallic glass is regarded as a potential candidate for the application of the CDCVM.
Also the increase of the size of a basic cluster provides a clue to clarify local topological structure typically contained in the metallic glass.
Sanditov: Glass Physics and Chemistry 29 (2003) 2

Box 4400, FI-02150 TKK, Finland. 2 Helsinki University of Technology, Biotechnology and Chemistry, P.O.
The test fuel cell consisted of a two-cylinder structure.
The anode catalyst structure was wetted on both sides of its surfaces.
The anode electrode consisted of a single-layer structure without diffusion material.

Introduction Recently, the reduction in the strength or the durability of concrete structures has become one social problem as the accidents by deterioration of a tunnel or a bridge occurred.
Overmuch adding water means the action that adds water more than the standard mix proportion to concrete, and it can be cited as a cause of the strength reduction of concrete structures.
After the 1970s, a placing method using a concrete pump is used well for the construction of concrete structures, and concrete with fluidity which prevents the blockade accident of the pump has come to be required.
Taylor: The Chemistry of Cements, Vol. 1, (Academic Press, New York, 1964)