INFLUENCE OF ANNEALING DURATION ON THE GROWTH OF V2O5 NANORODS SYNTHESIZED BY SPRAY PYROLYSIS TECHNIQUE

2016 ◽  
Vol 23 (06) ◽  
pp. 1650057
Author(s):  
N. M. ABD-ALGHAFOUR ◽  
NASER M. AHMED ◽  
Z. HASSAN ◽  
D. ABUBAKAR ◽  
M. BOUOUDINA
Keyword(s):  
Spray Pyrolysis ◽  
Spray Pyrolysis Technique ◽  
Xrd Analysis ◽  
Annealing Duration ◽  
Chemical Spray Pyrolysis ◽  
Tem Analysis ◽  
Glass Substrates ◽  
Increase With Increase ◽  
Transmission Electron ◽  
Annealing Effects

This paper deals with the investigation of annealing effects on the structural, morphological and optical properties of V2O5 nanorods (NRs) grown on the glass substrates by using chemical spray pyrolysis technique. The as-prepared samples were annealed at [Formula: see text] for 40, 60 and 120 min in a quartz tube furnace. The high resolution X-ray diffraction (XRD) analysis revealed V2O5 NRs with preferred orientation along (001) plane. The crystallite size of the V2O5 NRs was increased by increasing the annealing duration. The morphological observations using field emission scanning electron microscope (FESEM) displayed NRs structures whose diameter and length were found to increase with increase of the annealing duration. The transmission electron microscopy (TEM) analysis confirmed the orthorhombic structures of the NRs. The AFM measurements indicated an increase of the average surface roughness by increasing the annealing time. The Raman spectroscopy revealed V–O–V phonon mode in the NRs annealed for 120 min. The optical bandgap was found in the range 2.6–2.58[Formula: see text]eV and observed to decrease with various duration annealed.

Fabrication of Mesoporous Cerium Dioxide Films by Cathodic Electrodeposition

2007 ◽  
Vol 7 (11) ◽  
pp. 4198-4201 ◽  
Author(s):  
Young-Soo Kim ◽  
Jin-Kyu Lee ◽  
Jae-Hoon Ahn ◽  
Eun-Kyung Park ◽  
Gil-Pyo Kim ◽  
...  
Keyword(s):  
Small Angle ◽  
Cerium Dioxide ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Cubic Phase ◽  
Tem Analysis ◽  
X Ray ◽  
Cathodic Electrodeposition ◽  
Glass Substrates ◽  
Transmission Electron

Mesoporous cerium dioxide (Ceria, CeO2) thin films have been successfully electrodeposited onto ITO-coated glass substrates from an aqueous solution of cerium nitrate using CTAB (Cetyltrimethylammonium Bromide) as a templatingagent. The synthesized films underwent detailed characterizations. The crystallinity of synthesized CeO2 film was confirmed by XRD analysis and HR-TEM analysis, and surface morphology was investigated by SEM analysis. The presence of mesoporosity in fabricated films was confirmed by TEM and small angle X-ray analysis. As-synthesized film was observed from XRD analysis and HR-TEM image to have well-crystallized structure of cubic phase CeO2. Transmission electron microscopy and small angle X-ray analysis revealed the presence of uniform mesoporosity with a well-ordered lamellar phase in the CeO2 films electrodeposited with CTAB templating.

Preparation of Shape and Size-Controlled Zinc Oxide Nanostructures by Chemical Spray Pyrolysis Technique

2006 ◽  
Vol 957 ◽  
Author(s):  
Tatjana Dedova ◽  
Malle Krunks ◽  
Arvo Mere ◽  
Jelena Klauson ◽  
Olga Volobujeva
Keyword(s):  
Zinc Oxide ◽  
Spray Pyrolysis ◽  
Spray Pyrolysis Technique ◽  
Zno Nanorods ◽  
Solution Concentration ◽  
Spray Pyrolysis Method ◽  
Chemical Spray Pyrolysis ◽  
Zinc Oxide Nanostructures ◽  
Glass Substrates ◽  
Zno Rods

ABSTRACTHighly structured layers comprising of vertically aligned zinc oxide rods, tripods or platelets were fabricated by spray pyrolysis method at temperatures of 510-550 °C. The zinc chloride solution was pulverized onto the preheated substrates of glass and ITO, SnO2, ZnO covered glass substrates with the help of compressed air as a carrier gas. ZnO layers were characterized by scanning electron microscopy and Raman spectroscopy. C-axis orientated ZnO nanorod arrays of well-developed hexagonal rods with length from some hundreds of nanometers up to some microns and with diameter from 70 nm up to 900 nm . The rise of both the growth temperature and solution concentration increases rod dimensions. Deposition of the solutions with the concentration of 0.05 up to 0.2 mol/l results in structured layers composed of rods on glass substrates. Using ITO, SnO2 and ZnO thin film covered glasses diluted solutions should be used to obtain ZnO nanorods. Alcoholic solutions allow deposit thinner rods and reduce the deposition temperature. Very strong and relatively narrow E2 Raman bands indicate that ZnO rods prepared by spray pyrolysis technique are of high crystal quality.

scholarly journals Fe2O3 Thin Films Prepared by Spray Pyrolysis Technique and Study the Annealing on its Optical Properties

2015 ◽  
Vol 45 ◽  
pp. 24-31 ◽  
Author(s):  
Khalid Haneen Abass
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Spray Pyrolysis ◽  
Annealing Temperature ◽  
Spray Pyrolysis Technique ◽  
Chemical Spray Pyrolysis ◽  
Glass Substrates ◽  
Chemical Spray ◽  
Coefficient Increase ◽  
Uv Visible

Fe2O3 thin films that doped by NiO were obtained on glass substrates by the chemical spray pyrolysis technique, and annealed at 450 °C and 500 °C. The effect of annealing on optical properties was studied by recording the absorbance spectra using UV-Visible spectrophotometer. The refractive index decreases with increasing annealing temperature, such as an optical band gap that decreases from 2.68 eV before annealing to 2.58 eV after annealing of 500 °C. Absorption coefficient and extinction coefficient increase with increasing annealing temperature.

scholarly journals Optical Constants of Fe2O3 and TiO2:Fe2O3 Thin Films Prepared by Spray Pyrolysis Technique

2018 ◽  
Vol 26 (10) ◽  
pp. 224-232
Author(s):  
Asia Hussein Kadhim ◽  
Nahida B. Hasan
Keyword(s):  
Thin Films ◽  
Titanium Dioxide ◽  
Spray Pyrolysis ◽  
Optical Constants ◽  
Energy Gap ◽  
Spray Pyrolysis Technique ◽  
Optical Transmittance ◽  
Dielectric Constants ◽  
Chemical Spray Pyrolysis ◽  
Glass Substrates

"In the present work, optical constants have been studied for pure and titanium dioxide (TiO2) doped iron oxide (Fe2O3) thin films with different titanium dioxide dopant concentrations (1, 3 and 5 %) prepared by chemical spray pyrolysis technique on glass substrates. The optical properties of the films, which were prepared with a thickness of (260±10) nm, have been determined by using Shimadzu spectrophotometer, the optical transmittance measurements in the spectral region from (500- 1100) nm. Direct energy gap for (Fe2O3) equal (2.01) eV, it increases with increasing of TiO2%. The optical constants such as refractive index, extinction coefficient and dielectric constants have been calculated for all prepared films. The results show that all optical constants decrease with the increasing of dopant ratios."

X-Ray Diffraction Studies of CdxZn1-xS Thin Films Prepared by Spray Pyrolysis Technique

2012 ◽  
Vol 620 ◽  
pp. 340-344
Author(s):  
Y. Raviprakash ◽  
Kasturi V. Bangera ◽  
G.K. Shivakumar
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Spray Pyrolysis Technique ◽  
Hexagonal Wurtzite Structure ◽  
Chemical Spray Pyrolysis ◽  
X Ray Diffraction ◽  
Entire Study ◽  
Lattice Constants ◽  
Glass Substrates ◽  
Wide Range

Thin films of CdxZn(1-x)S (0 x 1) were deposited on glass substrates by the chemical spray pyrolysis technique using a less used combination of chemicals. The variation of structural properties of these films in relation with composition was studied in detail. The entire study was made for a wide range of compositions of CdxZn(1-x)S thin films (x=0 to 1 in steps of 0.1). XRD studies reveal that all the films are polycrystalline with hexagonal (wurtzite) structure of which reflection peaks associated with (100), (002) and (110) planes were clearly identified for all the films and inclusion of cadmium into the structure of ZnS improved the crystallinity of the films. The value of lattice constants a and c was found to vary with composition from 0.382 to 0.415 nm and 0.625 to 0.675 nm respectively.

scholarly journals Spray Pyrolysis Deposition of Nanostructured Tin Oxide Thin Films

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
G. E. Patil ◽  
D. D. Kajale ◽  
V. B. Gaikwad ◽  
G. H. Jain
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Spray Pyrolysis ◽  
Glass Substrate ◽  
Spray Pyrolysis Technique ◽  
Compositional Analysis ◽  
Xrd Analysis ◽  
Chemical Spray Pyrolysis ◽  
Visible Absorption ◽  
Spray Pyrolysis Deposition

Nanostructured SnO2 thin films were grown by the chemical spray pyrolysis (CSP) method. Homemade spray pyrolysis technique is employed to prepare thin films. SnO2 is wide bandgap semiconductor material whose film is deposited on glass substrate using aqueous solution of SnCl4·5H2O as a precursor. XRD (X-ray diffraction), UV (ultraviolet visible spectroscopy), FESEM (field emission scanning electron microscopy), and EDS (energy dispersive spectroscopy) analysis are done for structural, optical, surface morphological, and compositional analysis. XRD analysis shows polycrystalline nature of samples with pure phase formation. Crystallite size calculated from diffraction peaks is 29.92 nm showing nanostructured thin films. FESEM analysis shows that SnO2 thin film contains voids with nanoparticles. EDS analysis confirms the composition of deposited thin film on glass substrate. UV-visible absorption spectra show that the bandgap of SnO2 thin film is 3.54 eV. Bandgap of SnO2 thin film can be tuned that it can be used in optical devices.

Morphological, Structural, Electrical and Optical Properties of Copper-Doped Zinc Oxide Films Deposited by Spray Pyrolysis

2018 ◽  
Vol 930 ◽  
pp. 79-84
Author(s):  
Juliana Simões Chagas Licurgo ◽  
Herval Ramos Paes Junior
Keyword(s):  
Zinc Oxide ◽  
Spray Pyrolysis ◽  
Oxide Films ◽  
Electrical Characterization ◽  
Xrd Analysis ◽  
Band Gap Energy ◽  
Hexagonal Structure ◽  
Material Behavior ◽  
Glass Substrates ◽  
Zinc Oxide Films

In this work, copper-doped zinc oxide films (ZnO:Cu) were deposited by spray pyrolysis on glass substrates. The influence of doping concentration (0-10 at.%) on morphological, structural, optical and electrical properties of the ZnO:Cu films was investigated. Electrical characterization consisted in measuring the variation of electrical conductivity with temperature; they presented a typical semiconductor material behavior. Based on x-ray diffraction (XRD) analysis, it was able to confirm that the films are polycrystalline having a wurtzite hexagonal structure, preferentially oriented in the c-axis (002), and the crystallite size ranged from 41.60 to 50.70 nm. The optical characterization revealed that ZnO:Cu films present band gap energy between 3.18 and 3.27 eV. The films were homogeneous with good adhesion to the substrate. The results indicate the viability of using them in optoelectronic devices.

scholarly journals Structural and Optical Properties of Cobalt-Doped Zinc Oxide Thin Films Prepared By Spray Pyrolysis Technique

2010 ◽  
Vol 7 (1) ◽  
pp. 69-75
Author(s):  
Baghdad Science Journal
Keyword(s):  
Thin Films ◽  
Zinc Oxide ◽  
Optical Properties ◽  
Spray Pyrolysis ◽  
Spray Pyrolysis Technique ◽  
Texture Coefficient ◽  
Hexagonal Structure ◽  
Structural And Optical Properties ◽  
Lattice Constants ◽  
Glass Substrates

Undoped and Co-doped zinc oxide (CZO) thin films have been prepared by spray pyrolysis technique using solution of zinc acetate and cobalt chloride. The effect of Co dopants on structural and optical properties has been investigated. The films were found to exhibit maximum transmittance (~90%) and low absorbance. The structural properties of the deposited films were examined by x-ray diffraction (XRD). These films, deposited on glass substrates at (400? C), have a polycrystalline texture with a wurtzite hexagonal structure, and the grain size was decreased with increasing Co concentration, and no change was observed in lattice constants while the optical band gap decreased from (3.18-3.02) eV for direct allowed transition. Other parameters such as Texture Coefficient (Tc), dislocation density (?) and number of crystals (M) were also calculated .

scholarly journals A Study of the Structural and Optical Properties of SnS:F prepared by chemical spray pyrolysis technique

2014 ◽  
Vol 11 (2) ◽  
pp. 518-526
Author(s):  
Baghdad Science Journal
Keyword(s):  
Optical Properties ◽  
Spray Pyrolysis ◽  
Energy Gap ◽  
Spray Pyrolysis Technique ◽  
Chemical Spray Pyrolysis ◽  
Structural And Optical Properties ◽  
Optical Energy Gap ◽  
Optical Energy ◽  
Chemical Spray Pyrolysis Technique ◽  
Chemical Spray

Thin films of pure tin mono-sulfide SnS and tin mono-sulfide for (1,2,3,4)% fluorine SnS:F with Thicknesses of (0.85 ±0.05) ?m and (0.45±0.05) ?m respectively were prepared by chemical spray pyrolysis technique. the effect of doping of F on structural and optical properties has been studied. X-Ray diffraction analysis showed that the prepared films were polycrystalline with orthorhombic structure. It was found that doping increased the intensity of diffraction peaks. Optical properties of all samples were studied by recording the absorption and transmission spectrum in range of wave lengths (300-900) nm. The optical energy gap for direct forbidden transition and indirect allowed transition were evaluated It is found that for doping less than 2% the optical energy gap increases as the percentage of doping increases in the samples while for doping more than 2% the values of the optical energy gap decreases as the percentage of doping increases.

scholarly journals Structural, Morphological and Optical Characterization of SnO2:F Thin Films Prepared by Chemical Spray Pyrolysis

2013 ◽  
Vol 18 ◽  
pp. 90-102 ◽  
Author(s):  
Salam Amir Yousif ◽  
Jenan Mohamed Abass
Keyword(s):  
Spray Pyrolysis ◽  
Tin Oxide ◽  
Spray Pyrolysis Technique ◽  
Quartz Substrate ◽  
Visible Region ◽  
Ammonium Fluoride ◽  
Chemical Spray Pyrolysis ◽  
Fluorine Doping ◽  
Diffraction Patterns ◽  
D Values

Fluorine doped tin oxide (FTO) films were successfully prepared on glass and quartz substrate at a substrate temperature equal to 450 °C for different fluorine doping (0, 0.05, 0.1, 0.15) by a homemade spray pyrolysis technique. The spray solution prepared from tin tetrachloride pentahydrate (SnCl4 · 5H2O) dissolved in distilled water at (0.1 M) concentration and ammonium fluoride (NH4F) was added into the solution for fluorine doping. X-ray diffraction patterns of the spray-deposited (SnO2: F) films for different fluorine doping show that all the diffractograms contain the characteristic SnO2 orientations. The matching of the observed and standard d-values confirm that the deposited films are of tin oxide with tetragonal structure and the films are polycrystalline with (110) as a preferred growth orientation. The surface morphology of SnO2: F thin film has been examined by atomic force microscopy (AFM). The average transmittance in the visible region (at 550 nm) has been found (40%, 47%, 52%, 59%, 61%) for the fluorine doping (0, 0.05, 0.1, 0.15, 0.2) respectively.

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