scholarly journals ZnO/ZnAl2O4Nanocomposite Films Studied by X-Ray Diffraction, FTIR, and X-Ray Photoelectron Spectroscopy

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
S. Iaiche ◽  
A. Djelloul
Keyword(s):  
Photoelectron Spectroscopy ◽  
Ultrasonic Spray Pyrolysis ◽  
Nanocomposite Films ◽  
Spinel Oxide ◽  
X Ray Diffraction ◽  
Xps Spectra ◽  
X Ray ◽  
Ultrasonic Spray ◽  
Chloride Hydrate ◽  
Oxide Sulfate

ZnO/ZnAl2O4nanocomposite films were synthesised by ultrasonic spray pyrolysis (USP) by extracting Al2O(SO4)2oxide with zinc chloride hydrate in deionised water. The sample was then subjected to heat treatment at 650°C and 700°C for 1 h, which led to the formation of the spinel oxide (ZnAl2O4) and wurtzite (ZnO) phases. Al2(SO4)3·18H2O salt was transformed into aluminum oxide sulfate Al2O(SO4)2, which is an intermediary decomposition product, by calcination at 795°C for 3 h. The structures of the synthesised ZnO/ZnAl2O4films were confirmed by XRD, FTIR, and X-ray photoelectron spectroscopy (XPS). XPS spectra of the major Zn, Al, and O photoelectron lines and the major X-ray induced Zn LMM Auger lines for ZnO/ZnAl2O4are presented.

scholarly journals Optical, XPS and XRD Studies of Semiconducting Copper Sulfide Layers on a Polyamide Film

2009 ◽  
Vol 2009 ◽  
pp. 1-8 ◽  
Author(s):  
Valentina Krylova ◽  
Mindaugas Andrulevičius
Keyword(s):  
Photoelectron Spectroscopy ◽  
Copper Sulfide ◽  
Diffusion Method ◽  
X Ray Diffraction ◽  
Xps Spectra ◽  
X Ray ◽  
Xrd Studies ◽  
Polyamide Film ◽  
Indirect Band Gap ◽  
Xrd Method

Copper sulfide layers were formed on polyamide PA 6 surface using the sorption-diffusion method. Polymer samples were immersed for 4 and 5 h in 0.15 mol⋅  solutions and acidified with HCl (0.1 mol⋅) at . After washing and drying, the samples were treated with Cu(I) salt solution. The samples were studied by UV/VIS, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) methods. All methods confirmed that on the surface of the polyamide film a layer of copper sulfide was formed. The copper sulfide layers are indirect band-gap semiconductors. The values of are 1.25 and 1.3 eV for 4 h and 5 h sulfured PA 6 respectively. Copper XPS spectra analyses showed Cu(I) bonds only in deeper layers of the formed film, while in sulfur XPS S 2p spectra dominating sulfide bonds were found after cleaning the surface with ions. It has been established by the XRD method that, beside , the layer contains as well. For PA 6 initially sulfured 4 h, grain size forchalcocite, , was  nm and fordjurleite, , it was 54.17 nm. The sheet resistance of the obtained layer varies from 6300 to 102 .

Surface Characterization of Carbon-Bearing Magnetite (CBM) and Carbon-Bearing Ni(II)-Ferrite (CBNF)

1994 ◽  
Vol 344 ◽  
Author(s):  
T. Sano ◽  
K. Akanuma ◽  
M. Tsuji ◽  
Y. Tamaura
Keyword(s):  
Photoelectron Spectroscopy ◽  
Spinel Structure ◽  
Surface Characterization ◽  
Carbon Deposition ◽  
X Ray Diffraction ◽  
Xps Spectra ◽  
X Ray ◽  
Oxygen Ions ◽  
Diffraction Patterns

AbstractOxygen-deficient magnetite (ODM; Fe3O4-δ, δ>0) synthesized by reduction of magnetite with H2 at 300°C decomposed CO2 to carbon with an efficiency of nearly 100% at 300°C. In this reaction, two oxygen ions of the CO2 were incorporated into the spinel structure of ODM and carbon was deposited on the surface of ODM with zero valence to form visible particles. The particles of carbon separated from ODM were studied by Raman, energy-dispersive X-ray and wave-dispersive X-ray spectroscopies. The carbon which had been deposited on the ODM was found to be a mixture of graphite and amorphous carbon in at least two levels of crystallization. X-ray photoelectron spectroscopy and X-ray diffraction patterns of the carbon-bearing magnetite (CBM) showed no indication of carbide (Fe3C) or metallic iron (α-Fe) phase formation. In the C 1s XPS spectra of the CBM, no peaks were observed which could be assigned to CO2 or CO. X-ray diffractometry, chemical analysis and TG-MS measurement showed that the carbon-bearing Ni(II)-ferrite (CBNF) (Ni(II)/Fetotal = 0.15) synthesized by the carbon deposition reaction from CO2 with the H2-reduced Ni(II)-ferrite was represented by (Ni0.28Fe2.72O4.00)1-δ (Ni2+06.9Fe2+2.31O3.00)δCτ (δ= 0.27, τ= 0.17). The carbon of the CBNF gave the CIOlayer-like oxide containing some Ni2+ ions.

Study Behavior of XPS Spectra of Ni, Mn, Y and O in Y2NiMnO6 Ceramics

2015 ◽  
Vol 804 ◽  
pp. 97-103 ◽  
Author(s):  
Panakamon Deeyai ◽  
Thanapong Sareein ◽  
Bundit Putasaeng ◽  
Naphat Chathirat
Keyword(s):  
Photoelectron Spectroscopy ◽  
Ceramic Materials ◽  
Effect Of Temperature ◽  
Decomposition Technique ◽  
X Ray Diffraction ◽  
Xps Spectra ◽  
X Ray ◽  
Study Behavior ◽  
Sintering Time ◽  
Effects Of Temperature

Bulk Y2NiMnO6 samples were prepared by thermal decomposition technique at 800 °C for 6 hours. The effects of temperature on the structure of ceramics were investigated for different sintering temperatures in the range of 1000-1300 °C, while kept constant the sintering time of 12 hours. Structural characterization had been investigated via X-ray diffraction (XRD) on samples of different sintering temperatures. Results from the experiment had revealed that high temperature affected oxide in ceramic materials. Further analysis with X-ray photoelectron spectroscopy (XPS) technique had revealed an outstanding point of ceramics by investigating the Ni 2p, 2p3/2, Mn 2p1/2, 2p3/2, and Y 3d3/2, 3d5/2 at the surface of Y2NiMnO6 ceramics. The changes in relative intensity of XPS peaks and the shifts in their binding energy (eV) were observed in the results, while the effect of temperature on oxide in ceramics may be investigated with dielectric property in the future.

scholarly journals Preparation and Characterization of La0.8Sr0.2Ga0.8Mg0.2O3-δ Film by Electrophoretic Deposition Method

2010 ◽  
Vol 445 ◽  
pp. 86-90 ◽  
Author(s):  
Araki Toriyama ◽  
Kenichi Myoujin ◽  
Takayuki Kodera ◽  
Takashi Ogihara
Keyword(s):  
Thin Films ◽  
Electrophoretic Deposition ◽  
Ultrasonic Spray Pyrolysis ◽  
Diffraction Peak ◽  
Uniform Thickness ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ultrasonic Spray ◽  
Diffraction Patterns

La0.8Sr0.2Ga0.8Mg0.2O3-δ (LSGM) precursor particles were successfully prepared by ultrasonic spray pyrolysis. LSGM thin films were prepared by the electrophoretic deposition (EPD) technique using ethanol containing iodine. The LSGM films were obtained by sintering at 1300 °C for 10 h. The X-ray diffraction patterns revealed that the diffraction peak of LSGM thin films was in agreement with the perovskite structure. The LSGM films attained a uniform thickness of 10 μm.

Fe-loaded zeolites as catalysts in the formation of humic substance-like darkcoloured polymers in polycondensation reactions of humic precursors

Clay Minerals ◽  
2012 ◽  
Vol 47 (3) ◽  
pp. 355-364 ◽  
Author(s):  
S. Fukuchi ◽  
M. Fukushima ◽  
R. Nishimoto ◽  
G. Qi ◽  
T. Sato
Keyword(s):  
Cation Exchange ◽  
Photoelectron Spectroscopy ◽  
Ionic Species ◽  
Exchange Capacity ◽  
X Ray Diffraction ◽  
Xps Spectra ◽  
X Ray ◽  
Catalytic Activities ◽  
Ion Exchange Reaction ◽  
Xrd Patterns

AbstractTo enhance the catalytic activities of zeolites for the polycondensation reactions of humic precursors, Fe was loaded into a zeolite via an ion-exchange reaction and the resulting product was subjected to calcination at 773 K. Two types iron-loaded zeolites were prepared using one equivalent (Fe-Z-1) and 10-equivalents (Fe-Z-10) of Fe2+ to the cation-exchange capacity of a natural zeolite from Niki town (Hokkaido, Japan). X-ray diffraction (XRD) patterns and X-ray photoelectron spectroscopy (XPS) spectra showed that the Fe(II) that was originally loaded into the cation-exchange sites in the zeolite became oxidized to a Fe(III) ionic species during the preparation. The catalytic activities of each zeolite were evaluated, based on the degree of darkening for reaction mixtures containing catechol, glycine and glucose as model humic precursors. The catalytic activities of Fe-Z-1 and Fe-Z-10 were higher than that for an untreated zeolite, and increased with the amount of Fe in the zeolite.

scholarly journals Fabrication of Bi-DopedTiO2Spheres with Ultrasonic Spray Pyrolysis and Investigation of Their Visible-Light Photocatalytic Properties

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Jianhui Huang ◽  
Wahkit Cheuk ◽  
Yifan Wu ◽  
Frank S. C. Lee ◽  
Wingkei Ho
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Spray Pyrolysis ◽  
Photoelectron Spectroscopy ◽  
Diffuse Reflectance Spectroscopy ◽  
Ultrasonic Spray Pyrolysis ◽  
X Ray ◽  
Ultrasonic Spray ◽  
Doped Titania

Bismuth-doped TiO2submicrospheres were synthesized by ultrasonic spray pyrolysis. The prepared bismuth-doped titania was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-visible diffuse reflectance spectroscopy (UV-vis DRS), and X-ray photoelectron spectroscopy (XPS). Aqueous photocatalytic activity was evaluated by the decomposition of methyl orange under visible-light irradiation. The results indicate that doping of bismuth remarkably affects the phase composition, crystal structure, and the photocatalytic activity. The sample with 2% Bi exhibits the optimum photocatalytic activity.

Adaptive Nanocomposite Films Exhibiting Low Friction in a Broad Temperature Range

2005 ◽  
Author(s):  
C. Muratore ◽  
A. A. Voevodin ◽  
J. J. Hu ◽  
J. S. Zabinski
Keyword(s):  
Photoelectron Spectroscopy ◽  
Multilayer Film ◽  
Solid Lubricants ◽  
Deposition Process ◽  
Nanocomposite Films ◽  
X Ray Diffraction ◽  
Low Friction ◽  
X Ray ◽  
Composition And Structure ◽  
Different Temperatures

A hybrid magnetron sputtering/pulsed laser deposition process was used to grow nanocrystalline yttria stabilized zirconia (YSZ) embedded in an amorphous YSZ/metal matrix. This nanocomposite design reduced friction and improved the toughness of YSZ. Films containing both silver and molybdenum exhibited friction coefficients between 0.2 and 0.4 in air (40% relative humidity) against silicon nitride balls at temperatures between 25° C and 700 °C. Additional solid lubricants reduced the friction coefficient to <0.2 for over 10000 cycles at all temperatures. A multilayer film architecture was developed to further enhance the lifetime of the adaptive coatings. Electron microscopy, x-ray diffraction and x-ray photoelectron spectroscopy were used to correlate adaptive behavior at different temperatures to the composition and structure of the films.

Growth and Characterization of High Quality MgO Thin Films by Ultrasonic Spray Pyrolysis

2007 ◽  
Vol 280-283 ◽  
pp. 1171-1174 ◽  
Author(s):  
Ji Ming Bian ◽  
Xiao Min Li ◽  
Xiang Dong Gao ◽  
Wei Dong Yu
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Ultrasonic Spray Pyrolysis ◽  
Optimal Conditions ◽  
Quartz Glass Substrate ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ultrasonic Spray ◽  
Resistivity Meter

Ultrasonic spray pyrolysis has been applied to deposit MgO thin films on Si(100) and quartz glass substrate. The microstructures and properties of the as-grown MgO thin films were examined by X-ray diffraction, scanning electron microscopy, spectrophotometer and semiconductor resistivity meter. The results indicates that the MgO thin films deposited under optimal conditions shows smooth and dense surface without visible pores or defects over the substrate, and as well as good thickness uniformity. Almost completely (100)-oriented MgO films with the transmission higher than 90% in UV/VIS region and the resistivity at least in the order of 107Ω-cm were obtained. MgO thin film with such a crystal quality seems to be very suitable for acting as a buffer layer for the subsequent epitaxial growth of films.

scholarly journals Calcined Co(II)-Triethylenetetramine, Co(II)- Polyaniline-Thiourea as the Cathode Catalyst of Proton Exchanged Membrane Fuel Cell

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3070
Author(s):  
Wen-Yao Huang ◽  
Li-Cheng Jheng ◽  
Tar-Hwa Hsieh ◽  
Ko-Shan Ho ◽  
Yen-Zen Wang ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Linear Sweep Voltammetry ◽  
Conducting Medium ◽  
Membrane Electrode ◽  
X Ray Diffraction ◽  
Xps Spectra ◽  
X Ray ◽  
Co Catalysts ◽  
Electrode Assemblies ◽  
Diffraction Patterns

Triethylenetetramine (TETA) and thiourea complexed Cobalt(II) (Co(II)) ions are used as cathode catalysts for proton exchanged membrane fuel cells (PEMFCs) under the protection of polyaniline (PANI) which can become a conducting medium after calcination. Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) spectra clearly reveal the presence of typical carbon nitride and sulfide bonds of the calcined Nitrogen (N)- or Sulfur (S)-doped co-catalysts. Clear (002) and (100) planes of carbon-related X-ray diffraction patterns are found for co-catalysts after calcination, related to the formation of a conducting medium after the calcination of PANI. An increasing intensity ratio of the D to G band of the Raman spectra reveal the doping of N and S elements. More porous surfaces of co-catalysts are found in scanning electronic microscopy (SEM) micropictures when prepared in the presence of both TETA and thiourea (CoNxSyC). Linear sweep voltammetry (LSV) curves show the highest reducing current to be 4 mAcm−2 at 1600 rpm for CoNxSyC, indicating the necessity for both N- and S-doping. The membrane electrode assemblies (MEA) prepared with the cathode made of CoNxSyC produces the highest maximum power density, close to 180 mW cm−2.

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