نتایج جستجو برای: x ray diffraction analysis

تعداد نتایج: 3375249  

Journal: :international journal of nano dimension 0
g. chandra das department of chemistry, gauhati university, guwahati 781014, assam, india. d. bhuyan department of chemistry, gauhati university, guwahati 781014, assam, india. n. sen sarma physical sciences division, institute of advanced study in science and technology, guwahati-781035, assam, india. o. kumar medhi department of chemistry, gauhati university, guwahati 781014, assam, india.

a new approach for the synthesis of prussian blue nanoparticles using the cationic surfactant cetyl pyridinium chloride (cpc) as capping agent has been developed in the present work. powder x-ray diffraction, transmission electron microscopy, uv–vis absorption spectra, and ir spectroscopy were employed to characterize the product. the tem image showed that the prussian blue nanoparticles with d...

Journal: :journal of the iranian chemical research 0
parvain gharbani department of chemistry, islamic azad university, ahar branch, ahar, iran ali mehrizad, department of chemistry, islamic azad university, ahar branch, ahar, iran samad motameni tabatabii department of chemistry, islamic azad university, ahar branch, ahar, iran

the preparation of nano-sized tio2 by titanium tetraisopropoxide (ti(oipr)4) via sol-gelmethod using acid as a catalyst is investigated and the optimized conditions concerning theproportional amount of acid, water, alcohol is established by xrd and sem. the effect ofcalcination temperature on phase transformation of tio2 (rutile, anatase and brookite) wasdetermined by xrd. the smallest grain si...

Journal: :iranian journal of pharmaceutical sciences 0
mojtaba ansari faculty of biomedical engineering, amirkabir university of technology, tehran, iran fathollah moztarzadeh faculty of biomedical engineering, amirkabir university of technology, tehran, iran

nanocrystalline hydroxyapatite was precipitated from calcium hydroxide and phosphoric acid. effects of precipitation temperature and different calcium to phosphate ratios (ca/p) on the obtained powders were investigated. characteriza-tion of the powders was performed using xrd and ftir spectra, scanning electron microscopy, and transmission electron microscopy. increase in precipitation tempera...

A. Bamoniri, B. F. Mirjalili, S. M. Nezamalhosseini

The Knoevenagel condensation of aromatic aldehydes with barbituric acid, dimedone and malononitrile occurred in the presence of BF3/nano-γ-Al2O3 at room temperature in ethanol. This catalyst is characterized by powder X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR), thermal gravimetric analysis (TGA), field emission scanning electron microscopy (FESEM) and energy-disper...

2009
P. Korecki D. V. Novikov

We review an atomic resolution imaging method based on the analysis of the fine structure in X-ray absorption anisotropy, which results from incident beam diffraction. For a polychromatic X-ray beam, due to the suppression of higher order diffraction fringes, X-ray absorption anisotropy patterns can be interpreted as distorted real-space projections of the atomic structure around absorbing atom...

2006
K. NORRISH R. M. TAYLOR

Certain minerals in soil clays may be directly estimated from diffraction line intensity and the mass absorption coefficient of the sample to the radiation used. The main advantages of the method described are that no internal standards or calibration charts are required, and any diffraction line of the component to be estimated may be chosen. The results obtained compare favourably with chemic...

Journal: :international journal of nano dimension 0
a. a. mehrdad sharif department of analytical chemistry, faculty of chemistry, north tehran branch, islamic azad university, tehran, iran. s. abedini khorrami department of analytical chemistry, faculty of chemistry, north tehran branch, islamic azad university, tehran, iran. n. assi department of analytical chemistry, faculty of chemistry, north tehran branch, islamic azad university, tehran, iran.

zro2 nanopowder was prepared by the sol-gel auto-combustion method. the product was characterized by x-ray diffraction (xrd), energy dispersive analysis of x-ray (edx) and scanning electron microscopy (sem). the average crystalline size of zro2 was obtained 62 nm. also, photocatalytic removal of nitrophenol from aqueous solution by using nanoscale zro2 under uv light irradiation was studied. th...

Zahra Sharafi

The X-ray charge density analysis of a hydroxynaphthoquinnne derivative was obtained by multipolar Hansen-Coppens formalism refinement through high resolution X-ray diffraction data at 100(1) K. The molecularproperties of the title compound resulted from the combined experimental and the quantum theory of atoms inmolecules (QTAIM) studies. The topological properties of the covalent bonds and of...

بخشی, سعیدرضا, برهانی, غلامحسین, خواجه لکزای, محمد,

In this study, synthesis of silicon nitride by mechanical alloying and the effects of important parameters of milling time and heat treatment temperature, time and rate are presented. Silicon micro powder and nitrogen gas were used as precursor materials. Synthesized phases, morphology and particle size were investigated by X-ray diffraction pattern (XRD) and Field emission scanning electron mi...

In this research we report synthesis of new Barium- Cobalt precursor complex with 2,6- pyridine dicarboxylic acid (dipic).Thecomplex[Ba(H2O)6][Co(dipic)2[(1)has been characterized using spectral methods (FT-IR, UV–Vis),elemental analysis and Cyclic voltammetric (CV) method. Also in this study we report thermal decomposition of inorganic precursor complex of (1).Characterization of the binary ox...

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