Synthesis and characterization of polyether structure carbon nitride

2004 ◽  
Vol 19 (6) ◽  
pp. 1736-1741 ◽  
Author(s):  
Tiancheng Mu ◽  
Jun Huang ◽  
Zhimin Liu ◽  
Buxing Han ◽  
Zhonghao Li ◽  
...  
Keyword(s):  
Spectroscopic Data ◽  
Carbon Nitride ◽  
Average Diameter ◽  
Building Blocks ◽  
Spherical Particles ◽  
X Ray Diffraction ◽  
Substantial Evidence ◽  
X Ray ◽  
Prepared Material

Carbon nitride powder with an atomic N/C ratio of 1 has been prepared by reaction of cyanuric chloride with sodium metal. X-ray diffraction, Fourier transform infrared spectra, and x-ray photoelectron spectroscopic data provide substantial evidence for a graphite-like sp2-bonded structure composed of building blocks of s-triazine rings bridged by carbon-carbon atoms in the bulk carbon nitride. The electron-microscopy results reveal that the material is spherical particles with an average diameter of 50 nm. The optical properties and thermal stability are also characterized. Based on the experimental results, it is deduced that the structure of as-prepared material carbon nitride has polyether structure.

Preparation and Characterization of A Composite Obtained through Ti (IV) and Phosphoric Acid

2014 ◽  
Vol 775-776 ◽  
pp. 97-101
Author(s):  
Loanda Raquel Cumba ◽  
U.O. Bicalho ◽  
D.R. Carmo
Keyword(s):  
Phosphoric Acid ◽  
Titanium Isopropoxide ◽  
Deionized Water ◽  
Spherical Particles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Electron Microscopies ◽  
Prepared Material ◽  
Scanning Electron

This paper describes the preparation and complementary characterization of a composite formed from the activation of titanium isopropoxide by phosphoric acid and deionized water (TiP).Techniques such as, X-ray diffraction (XRD), Raman , electronic (UV-vis) and Scanning electron microscopies (SEM) were used for characterization of this new composite formed. In the X-ray diffractogram of TIP was observed four intense peaks. A strong absorption was observed in the region 362-445 nm. The scanning electron microscopy of TiP, shows that the prepared material consists mostly of a cluster of spherical particles with diameters ranging from 2.35 to 2.60 μm.

Synthesis and characterization of the new tin borate SnB8O11(OH)4

2018 ◽  
Vol 73 (5) ◽  
pp. 337-348 ◽  
Author(s):  
Sandra Schönegger ◽  
Klaus Wurst ◽  
Gunter Heymann ◽  
Andreas Schaur ◽  
Andreas Saxer ◽  
...  
Keyword(s):  
Hydrothermal Process ◽  
Building Blocks ◽  
Membered Ring ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
X Ray ◽  
Thermoanalytical Investigations ◽  
Hydrogen Bond Interactions ◽  
Simple Hydrothermal Process

AbstractA new tin(II) borate with the composition SnB8O11(OH)4 was synthesized by a simple hydrothermal process. It crystallizes in the centrosymmetric monoclinic space group P21/n (no. 14) with the lattice parameters a=790.1(1), b=1402.2(2), c=994.8(1) pm, and β=90.40(5)° (Z=4). The new compound SnB8O11(OH)4 is isotypic to PbB8O11(OH)4 and isostructural to BaB8O11(OH)4. The borate layers are built up from fundamental building blocks (FBBs) with the composition [B8O11(OH)4]2−. Four of these FBBs form a nine-membered ring wherein the Sn2+ cations are located. These boron-oxygen layers are further connected by O–H···O hydrogen bond interactions. The characterization of SnB8O11(OH)4 is based on single-crystal X-ray diffraction data, vibrational spectroscopy, DFT calculations, and thermoanalytical investigations including high temperature powder XRD.

Hydrothermal Synthesis and Structure Characterization of a Bi-Capped Keggin Heteropoly Molybdovanadated Derivative

2014 ◽  
Vol 1004-1005 ◽  
pp. 542-545
Author(s):  
Ya Bing Liu ◽  
Li Guang Xiao
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Building Blocks ◽  
Crystal Structure Analysis ◽  
Structure Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Hydrogen Bonding Interactions ◽  
Supramolecular Networks

A new bi-capped Keggin heteropoly molybdovanadated derivative, [Co (en)3]2[SiMo8V6O42]∙6H2O (1) (en = ethylendiamine) has been hydrothermally synthesized and structurally characterized by the elemental analysis, IR, XPS and single crystal X-ray diffraction. The crystal structure analysis reveals that compound 1 consists of [Co (en)3]2+transition metal coordination fragment and the [SiMo8V6O42]4-building blocks, which are linked together via hydrogen-bonding interactions to form a new 3-D supramolecular networks.

PREPARATION AND CHARACTERIZATION OF AMINO-MODIFIED Fe3O4 MAGNETIC NANOCOMPOSITE PARTICLES BY ONE-STEP GLYCOTHERMAL METHOD

2013 ◽  
Vol 27 (19) ◽  
pp. 1341002 ◽  
Author(s):  
YUHONG ZHANG ◽  
BIAO YAN ◽  
TAIGANG SHI
Keyword(s):  
Iron Oxide ◽  
Average Diameter ◽  
Magnetic Nanocomposite ◽  
Spherical Particles ◽  
X Ray Diffraction ◽  
Nanocomposite Particles ◽  
Glycothermal Method ◽  
Transmission Electron ◽  
One Step

Amino-modified Fe 3 O 4 magnetic nanocomposite particles were prepared by one-step glycothermal method. The shape and morphology of Fe 3 O 4 particles change when a small amount of water is added as a co-solvent in the glycothermal method. The morphology and structure of the sample were characterized and measured by transmission electron microscopy (TEM), X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy. TEM images show that the morphology of the samples is from irregular polyhedron to spherical particles. Average diameter of particles is approximately 70/40/10 nm and more evenly distributed. XRD results show that the samples are cubic spinel structure. FTIR results show that a chemical bonds combination exists between the amino and iron oxide, nano-iron oxide are modified by the amino.

Microstructural Characterization of Silicon-Alloyed Pyrolytic Carbon for Mechanical Heart Valves

2011 ◽  
Vol 230-232 ◽  
pp. 420-423
Author(s):  
Jian Hui Zhang ◽  
Hai Bo Sun ◽  
Gen Ming Wang ◽  
Peng Hai Guo
Keyword(s):  
Heart Valves ◽  
Microstructural Characterization ◽  
Pyrolytic Carbon ◽  
Spherical Particles ◽  
X Ray Diffraction ◽  
Carbon Coatings ◽  
X Ray ◽  
Crystallite Sizes ◽  
Two Phases

Microstructural information obtained for silicon-alloyed pyrolytic carbon coatings used for heart valves using X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy is described. The coatings consist of two phases, pyrolytic carbon and β silicon carbide, whose crystallite sizes are small. The coatings are principally composed of spherical particles that are from 300 to 1000 nm in diameter. These spherical particles, between which there are occasionally pores, are welded by laminar carbons. The silicon, content of which is moderate, disperses uniformly in the coatings.

Synthesis and Structural Characterization of a New Two-dimensional Organic-Inorganic Hybrid Molybdoarsenate: [Cu(en)2]2[(CuO6)Mo6O18(As3O3)2]

2010 ◽  
Vol 65 (2) ◽  
pp. 163-167 ◽  
Author(s):  
Qiang Wu ◽  
Qiuxia Han ◽  
Lijun Chen ◽  
Pengtao Ma ◽  
Jingyang Niu
Keyword(s):  
Thermogravimetric Analysis ◽  
Building Blocks ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
Inorganic Hybrid ◽  
X Ray ◽  
Cell Dimensions ◽  
Unit Cell Dimensions ◽  
2D Network

A new organic-inorganic hybrid molybdoarsenate constructed from a unit with two (As3O3) rings capping Anderson-type moieties, [Cu(en)2]2[(CuO6)Mo6O18(As3O3)2] (1) (en = ethylenediamine), has been hydrothermally synthesized and characterized by single-crystal X-ray diffraction and thermogravimetric analysis. The compound crystallizes monoclinically, space group P21/c, with unit cell dimensions a = 9.1541(7), b = 19.6348(14), c = 14.5205(8) Å ,β = 129.082(3)◦,V = 364.20(4) Å3, Z = 2, T = 296(2) K. Complex 1 represents the first example of a 2D network of a POM polymer where [(CuO6)Mo6O18(As3O3)2]4− building blocks are connected by complex fragments {Cu(en)2}2+.

Das Koordinationsverhalten des Acetylendisulfids Bis(benzylthio)acetylen gegenüber nullwertigen Metallkomplexen des W, Co und Pt/The Coordination Behavior of the Acetylenedisulfide Bis(benzylthio)acetylene with Zero-valent Metal Complexes of W, Co and Pt

2007 ◽  
Vol 62 (5) ◽  
pp. 669-674 ◽  
Author(s):  
Wolfram W. Seidel ◽  
Matthias J. Meel ◽  
Thomas Lügger
Keyword(s):  
Metal Complex ◽  
Spectroscopic Data ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Coordination Behavior ◽  
Donor Ability ◽  
Alkyne Complexes ◽  
Sulfide Group

Abstract Synthesis and characterization of the alkyne complexes [Co2(CO)6(L)], [W(CO)(L)3] and [Pt(PPh3)2(L)] with L = BnSC2SBn (Bn = benzyl) are described. X-Ray diffraction studies of [W(CO)(L)3] and [Co2(CO)5(L)]2 reveal that the donor ability of the sulfide group depends on the electronic and steric situation in the particular metal complex. The specific donor strength of sulfidesubstituted alkynes in their complexes is discussed considering the IR and NMR spectroscopic data.

A new route for the synthesis of calcium-deficient hydroxyapatites with low Ca/P ratio: Both spectroscopic and electric characterization

2000 ◽  
Vol 15 (11) ◽  
pp. 2526-2533 ◽  
Author(s):  
M. Andrés-Vergés ◽  
C. Fern´andez-González ◽  
M. Martínez-Gallego ◽  
J. D. Solier ◽  
I. Cachadiña ◽  
...  
Keyword(s):  
Ionic Conduction ◽  
Average Diameter ◽  
Spherical Particles ◽  
Mixed Solution ◽  
Infrared Absorption Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
A Value ◽  
Approximate Composition ◽  
Hydrolysis Of

A new route for obtaining calcium-deficient apatites with a Ca/P ratio lower than 1.5 is described, in order to study their proton conduction at temperatures lower than 400 °C. The process is based on the hydrolysis of a mixed solution of Ca(NO3)2 and NH4H2PO4 in the presence of hexamethylenetetramine at a pH of approximately 5 and temperatures of 85–90 °C. The resulting spherical particles of 14 μm in average diameter were aggregates of smaller needles with approximate composition Ca8.5(HPO4)2(PO4)4OH · H2O. The effects of the reagent concentrations, pH, aging time, and temperature were studied, and the solids were characterized by x-ray diffraction, infrared absorption spectroscopy, and electron microscopy. The ionic conduction measured by alternating-current impedance spectroscopy yielded a value of 3 μSm−1 at 200 °C.

scholarly journals Characterization of Copper Complex Nanoparticles synthesized by Plant Polyphenols

2017 ◽  
Author(s):  
Zhiqiang Wang ◽  
Pengfei An
Keyword(s):  
Copper Oxide ◽  
Copper Ions ◽  
Spherical Particles ◽  
Oxide Material ◽  
X Ray Diffraction ◽  
X Ray ◽  
X Ray Absorption ◽  
Synthesis Approach ◽  
Ceramic Catalyst

AbstractIn this paper a kind of copper oxide material of copper–polyphenols complex nanoparticles (Cu–P NPs) were synthesized by Cinnamomum pedunculatum leaves extract, which have different morphology and appearance compared with usual copper oxides Cu2O and CuO. For better understanding about this material, the Cu–P NPs were characterized using scanning electron microscopy (SEM), X-ray absorption spectroscopy (XAS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). It was found that synthesized Cu–P NPs were amorphous with spherical particles ranged from 80 to 500 nm. XAS data analysis indicated that the synthesized Cu–P NPs has different molecular structure with Cu2O and CuO. It is assumed that the copper ions chelated with polyphenol molecule. The nanoparticles showed a clear anti Escherichia coli activity in this study, and may also be used in fields of semiconductor, ceramic, catalyst, and sensor. This synthesis approach provided a novel route to manufacture copper oxide nanomaterial.

Preparation and Characterization of Needle-Like ZnO on TiO2 Nanoparticles by Solution-Immersion Method and RF Magnetron Sputtering

2013 ◽  
Vol 832 ◽  
pp. 596-601 ◽  
Author(s):  
N.A.M. Asib ◽  
Aadila Aziz ◽  
A.N. Afaah ◽  
Mohamad Rusop ◽  
Zuraida Khusaimi
Keyword(s):  
Magnetron Sputtering ◽  
Average Diameter ◽  
Rf Magnetron Sputtering ◽  
Zno Nanostructures ◽  
X Ray Diffraction ◽  
Immersion Method ◽  
X Ray ◽  
Xrd Patterns ◽  
Average Size

Needle-like zinc oxide (ZnO) nanostructures was deposited on titanium dioxide (TiO2) nanoparticles by solution-immersion method and Radio Frequency (RF) magnetron sputtering with diffferent RF powers, respectively on a glass substrate to synthesis nanocomposites of ZnO/TiO2. Field Emission Scanning Electrons Microscope (FESEM) images demonstrate that needle-like ZnO (112-1110 nm) are deposited on the surface of the TiO2nanoparticles with the diameter of approximately 36.3-62.9 nm. At 200 W, more needle-like ZnO with smallest average diameter (112 nm) appeared on the TiO2nanoparticles, which also has the smallest average size of 36.3 nm The compositions of elements in the nanocomposites were showed by Energy Dispersive X-ray Spectrometry (EDX). All elements of Ti, O, and Zn are observed as major components which confirm the presence of TiO2and ZnO in the composite. X-ray Diffraction (XRD) patterns of the nanocomposites show ZnO formed on TiO2nanoparticles are hexagonal with a wurtzite structure and it revealed ZnO/TiO2thin films were succesfully deposited as nanocomposites of ZnTiO3at 100 W,Zn2TiO4at 150 W and Zn2Ti3O8at 200 W and above.

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