scholarly journals Effect of Nitrogen Doping On The Structural Surface And Optical Properties Of ZnO Thin Film Prepared By Spraypyrolysis

2021 ◽  
Author(s):  
Rajalekshmi ES ◽  
V. Anslin Ferby ◽  
R. Shabu ◽  
A. Moses Ezhil Raj
Keyword(s):  
Fourier Transform ◽  
Morphological Properties ◽  
Zno Films ◽  
Spray Pyrolysis Method ◽  
X Ray Diffraction ◽  
Bending Vibrations ◽  
Sem Images ◽  
Structural Surface ◽  
Raman Spectral ◽  
Fourier Transform Raman

Abstract Pure and Nitrogen doped ZnO thin films were fabricated using spray pyrolysis method. The influence of doping on the structural, optical and morphological properties of prepared films were studied. The prepared samples were characterized through XRD (X-Ray Diffraction), FTIR (Fourier Transform Infrared Spectroscopy), FT-RAMAN (Fourier Transform Raman), optical transmittances of prepared films were studied as a function of wavelength using UV-VIS-NIR spectrophotometer and SEM (Scanning Electron Microscope). Absorption coefficient and Extinction coefficient values were calculated. Thickness of the films were found increasing with increasing doping concentrations. Structural studies confirmed that the prepared films were highly crystalline and predominantly orientation along (0 0 2) direction. On varying the doping concentration of N, a shift in the (0 0 2) peak was observed. FTIR and Raman spectral investigations revealed bands at specified wavenumber regions corresponding to stretching and bending vibrations of Zn and O. High resolution SEM images proved the presence of regular distribution of grains and the surface was found continuous, free from crack and holes. EDAX spectrum shows the attained films contain of Zinc, Oxygen and Nitrogen elements. Present investigations confirmed the fusion of nitrogen into ZnO lattice and modified the structural, optical and morphological properties of ZnO films.

scholarly journals Chromium (III) Oxide Nanostructures Synthesized from Vernonia Amygdalina Leaves Extract

2020 ◽  
Vol 10 (1) ◽  
pp. 1856-1861
Keyword(s):  
Fourier Transform ◽  
Average Crystallite Size ◽  
Fourier Transform Infrared ◽  
Morphological Properties ◽  
X Ray Diffraction ◽  
Vernonia Amygdalina ◽  
Sem Images ◽  
X Ray ◽  
Chloride Hexahydrate ◽  
Diffraction Patterns

This contribution reports first time synthesis of Cr2O3 nanostructures from chromium (III) chloride hexahydrate precursor using Vernonia amygdalina leaves extract as a reducing and stabilizing agent. Powder X-ray diffraction, Fourier-transform infrared spectroscopy, and scanning electron microscopy techniques were used to study the structural and morphological properties of the as-synthesized Cr2O3 nanostructures. Powder X-ray diffraction patterns spectral analysis showed that hexagonal Cr2O3 nanostructures with an average crystallite size of 23.4 nm were synthesized with the minor appearance of CrO2. SEM images showed that the synthesized nanomaterials are granules. Fourier-transform infrared spectra represent a sharp absorption band at 552 cm-1, which indicates Cr-O-Cr vibrational and stretching modes.

Hollow Spherical CaMoO4:Eu3+, Li+ Phosphors Prepared by Spray Pyrolysis

2013 ◽  
Vol 652-654 ◽  
pp. 563-566
Author(s):  
Xia Wang ◽  
Chang Cheng Liu ◽  
Zhen Hua Liang ◽  
Gui Hua Peng ◽  
Xiao Bao Han
Keyword(s):  
Spray Pyrolysis ◽  
Hollow Spheres ◽  
Emission Spectra ◽  
Luminescent Properties ◽  
Spray Pyrolysis Method ◽  
X Ray Diffraction ◽  
Sem Images ◽  
X Ray ◽  
Red Phosphors ◽  
Diffraction Peaks

Hollow spherical CaMoO4:Eu3+, Li+red phosphors have been successfully synthesized by spray pyrolysis method. The crystalline phase, morphology and luminescent properties of the obtained samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence emission spectra (PL). The XRD results demonstrated that all the diffraction peaks of the samples can be well indexed to the tetragonal phase of CaMoO4. The SEM images showed that the particles were composed of hollow spheres, whose diameters are about 1.4 μm. The as-prepared CaMoO4:Eu3+, Li+hollow spheres show a strong red emission corresponding to the5D0-7F2transition of the Eu3+ ions under ultraviolet light.

scholarly journals Effect of 6 MeV electron Irradiation on Nano-Cu 2 ZnSnS 4

2021 ◽  
Author(s):  
Sneha Pravin Kandare ◽  
V. N. Bhoraskar ◽  
A. B . Phatangare ◽  
Rekha Rao ◽  
Mala Rao ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Electron Irradiation ◽  
Nano Particles ◽  
Morphological Properties ◽  
X Ray Diffraction ◽  
Spectroscopy Analysis ◽  
Sem Images ◽  
X Ray ◽  
Pristine Sample ◽  
Peak Broadening

Abstract Microwave synthesized nano sized Cu2ZnSnS4 (CZTS) powder was irradiated with 6 MeV electrons, to investigate stability under radiation. The structural, optical, vibrational and morphological properties were explored using X-ray diffraction, UV-Visible spectroscopy, Raman spectroscopy and Scanning Electron Microscope (SEM).The irradiated sample shows significant change in properties when compared to the pristine sample. X ray peak broadening analysis has been used to estimate the crystallite size and lattice strain. Raman spectroscopy analysis confirms the transition of ordered kesterite to disordered kesterite phase after electron irradiation at electron fluence of 4 x1015 e-/cm2. CZTS nano-particles having hierarchical flower like morphology starts agglomerating after electron irradiation as observed from SEM images. The sample did not amorphize upto the highest fluence 4 x 1015 e-/cm2 employed in this study.

Effects of Annealing on Properties of (Na,Mg):ZnO Thin Films Deposited by Sol-Gel Method

2014 ◽  
Vol 898 ◽  
pp. 33-36 ◽  
Author(s):  
Cai Zhen Zhang ◽  
Yong Gang Chen ◽  
Su Liu
Keyword(s):  
Annealing Temperature ◽  
Sol Gel ◽  
Zno Films ◽  
X Ray Diffraction ◽  
X Ray ◽  
Glass Substrates ◽  
Coating Method ◽  
Method Effects ◽  
Structural Surface ◽  
Co Doped

Na/Mg co-doped (Na,Mg):ZnO films were fabricated on pyrex glass substrates by sol-gel spin-coating method. Effects of annealing on properties of the films were particularly investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmittance spectra. The internal stress of the films annealed at different temperature was calculated. Experimental and analytical results show that some NaCl freeze-out derivatives will appear on films when the annealing temperature is too low, with the increasing annealing temperature, the c-axis tensile stress is sharply decreased first, then the c-axis stress was changed into press stress and its value is increased continuously, so the structural, surface and the optical properties of the films improve first and deteriorate afterwards.

The Structural, Optical and Electrical Properties of Spray Deposited Fluorine Doped ZnO Thin Films

2013 ◽  
Vol 1494 ◽  
pp. 139-144 ◽  
Author(s):  
Kondaiah Paruchuri ◽  
Vanjari Sundara Raja ◽  
Suda Uthanna ◽  
N. Ravi Chandra Raju
Keyword(s):  
Thin Films ◽  
Dopant Concentration ◽  
Hydrogen Atmosphere ◽  
Charge Carriers ◽  
Zno Films ◽  
Spray Pyrolysis Method ◽  
Fluorine Concentration ◽  
X Ray Diffraction ◽  
Glass Substrates ◽  
Starting Solution

ABSTRACTHighly transparent and conducting Fluorine doped zinc oxide thin films were deposited using spray pyrolysis method on glass substrates held at 450 °C. The X-ray diffraction study revealed that as the dopant concentration increases in ZnO films, the intensity of the preferential orientation of (002) reflection decreased and (101) was found to increase up to 5 at. % F. The crystallite size was varied from 40 to 50 nm with dopant concentration. The optical band gap of the un-doped films was 3.30 eV and it increased to 3.34 eV for 3 at. % F. The refractive index of the films was increased from 2.05 to 2.18 with the increase of dopant concentration from 0 to 5 at. %. The scanning electron microscopy results depicted that the microstructure of ZnO: F films highly influenced by the fluorine doping. After annealing the films in hydrogen atmosphere, the resistivity of the films decreased as increase the dopant concentration and it is 4×10−3 Ω cm for 3at. % F beyond which it increased. The mobility of the charge carriers was 14 cm2/ V sec and the carrier concentration was 7.8×1019 cm3 obtained for the films doped with 3 at. % of fluorine concentration in the starting solution.

SUPERCAPACITOR BEHAVIOR OF SPRAY DEPOSITED SnO2 THIN FILMS

2011 ◽  
Vol 10 (06) ◽  
pp. 1245-1248 ◽  
Author(s):  
S. VIJAYAKUMAR ◽  
S. NAGAMUTHU ◽  
K. K. PURUSHOTHAMAN ◽  
M. DHANASHANKAR ◽  
G. MURALIDHARAN
Keyword(s):  
Thin Films ◽  
Tin Oxide ◽  
Sem Analysis ◽  
Morphological Properties ◽  
Spray Pyrolysis Method ◽  
X Ray Diffraction ◽  
Oxide Thin Films ◽  
Rutile Structure ◽  
Electrochemical Tests ◽  
Sem Image

Tin oxide thin films were prepared via spray pyrolysis method. The structural and morphological properties of SnO2 thin films have been investigated using X-ray diffraction (XRD) and scanned electron microscope (SEM) analysis. The XRD pattern confirms the tetragonal rutile structure of SnO2 with preferential orientation along (200) plane. SEM image reveals the nanocrystalline nature of the SnO2 films. SnO2 thin films were subjected to electrochemical tests to study the supercapacitor behavior. Maximum specific capacitance of 168 F/g at a scan rate of 25 mV/s was obtained using 0.5 M KOH as the electrolyte. This is the highest value ever reported for spray deposited tin oxide thin films.

Synthesis and Properties of Conducting Polyaniline by Co-Doping with Sulfosalicylic Acid and Sulfate Acid

2010 ◽  
Vol 663-665 ◽  
pp. 481-485 ◽  
Author(s):  
Hui Huang ◽  
Zhong Cheng Guo ◽  
Ju Kang Li
Keyword(s):  
Fourier Transform ◽  
Oxidative Polymerization ◽  
X Ray Diffraction ◽  
Chemical Oxidative Polymerization ◽  
Sulfosalicylic Acid ◽  
X Ray ◽  
Co Doping ◽  
Doped Polyaniline ◽  
Fourier Transform Raman ◽  
Ft Raman

A chemical oxidative polymerization of aniline sulfosalicylic acid (ANISSA) and aniline sulfate acid (ANIH2SO4) was performed in an aqueous solution. A co-doped polyaniline (PANI) was thus obtained, a higher conductivity than the insoluble H2SO4-doped PANI compressed pellet, and much higher conductivity than that prepared from pure ANISSA. The PANI doped with SSA and H2SO4 was characterized using Fourier-transform infrared spectra (FTIR), Fourier-transform Raman spectra (FT-Raman), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). The investigation reveals that SSA and H2SO4 as dopant not only enhances crystallinity of polyaniline but also stability of polyaniline.

Preparation and Characterization of HAp/TiO2 Nanocomposite for Photocatalytic Degradation of Methyl Orange under UV-Irradiation

2013 ◽  
Vol 829 ◽  
pp. 594-599 ◽  
Author(s):  
Saham Sharifat ◽  
Hossein Zolgharnein ◽  
Abdolghader Hamidifalahi ◽  
Mahnaz Enayati-Jazi ◽  
Entesar Hamid
Keyword(s):  
Fourier Transform ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Uv Irradiation ◽  
Methyl Orange Solution ◽  
Fourier Transform Infrared ◽  
X Ray Diffraction ◽  
Sem Images ◽  
X Ray ◽  
Electron Microscopes

A new in-situ precipitation technique is introduced in this study to prepare hydroxyapatite/titania nanocomposites. This technique provides a better control over the microstructures and phase compositions of nanocomposites. The structure and surface morphology of hydroxyapatite/titania nanocomposite were characterized by X-ray diffraction analysis, Fourier transform infrared spectroscopy and scanning electron microscopes. The photocatalytic activity of hydroxyapatite/titania nanocomposite was evaluated by photocatalytic decolorization of methyl orange in aqueous solution as a model pollutant under UV-irradiation. X-ray diffraction and Fourier transform infrared results indicated that hydroxyapatite and anatase (TiO2) were the major crystalline phases. There had been no reaction between hydroxyapatite and titania compounds. Based on the SEM images, the overall morphology of the samples indicates that there exists a distribution of small particles and large agglomerates.The hydroxyapatite/titania nanocomposite exhibited high photocatalytic activity hydroxyapatite/titania nanocomposite under UV-irradiation. After 8 h of irradiation by UV-irradiation, over 80% of methyl orange solution (5 mg L-1) was decolorized with 1 gL-1 of the photocatalyst. Since this process does not require the addition of hydrogen peroxide and uses UV-irradiation in this study are environmentally friendly method to decolorize azo dye.

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