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Effect of Dip Time on Electrodeposited Zinc Oxide Nanofilm
Nonso Livinus Okoli,
Chinwe Juliana Nkamuo,
Chukwuemeka Innocent Elekalachi
Issue:
Volume 3, Issue 2, June 2018
Pages:
7-11
Received:
16 June 2018
Accepted:
1 July 2018
Published:
23 July 2018
Abstract: Nanofilms of Zinc Oxide (ZnO) were fabricated from solutions of zinc tetraoxosulphate heptahydrate, citric acid, and sodium hydroxide onto a Fluorine Tin Oxide (FTO) conductive glass by elecrodeposition process. Time as bath parameter was varied. Three samples with time interval of 30 seconds, 60 seconds and 90 seconds were fabricated. Absorbance of the films was determined with the help of spectrophotometer. Other optical properties of the nanofilms were calculated using the appropriate equations from the literature. The deposited nanofilms have high absorbance in UV region and low absorbance in VIS – NIR region. Transmittance of the nanofilms is low in UV region and high in VIS – NIR region. Reflectance of the films is low throughout the UV – VIS – NIR regions. The optimal optical thickness of 270 nm was obtained at 90 seconds. The bandgap of the nanofilms obtained is between 3.30 to 3.60 eV. Average crystallite size of 43.04 nm was obtained for the deposited ZnO thin film.
Abstract: Nanofilms of Zinc Oxide (ZnO) were fabricated from solutions of zinc tetraoxosulphate heptahydrate, citric acid, and sodium hydroxide onto a Fluorine Tin Oxide (FTO) conductive glass by elecrodeposition process. Time as bath parameter was varied. Three samples with time interval of 30 seconds, 60 seconds and 90 seconds were fabricated. Absorbance o...
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Effect of Precursor Solvents on the Optical Properties of Copper Oxide Thin Films Deposited Using Spray Pyrolysis for Optoelectronic Applications
Adeniyi Yisau Fasasi,
Edward Osagie,
David Pelemo,
Eusebius Obiajunwa,
Emmanuel Ajenifuja,
John Ajao,
Gabriel Osinkolu,
Wasiu Oladotun Makinde,
Abiodun Eyitayo Adeoye
Issue:
Volume 3, Issue 2, June 2018
Pages:
12-22
Received:
12 June 2018
Accepted:
26 June 2018
Published:
25 July 2018
Abstract: Copper oxide thin films were deposited on Pyrex glass substrates by spray pyrolysis using ethanol and distilled water (DW) respectively as solvents. Rutherford backscattering spectroscopy results indicated that films from aqueous are thicker than those of alcoholic solutions. Rutherford backscattering spectroscopic compositional results showed the films to be mainly CuO. Optical transmittance measurement of the films was analyzed to obtain the band gap, Urbach energy, optical conductivity, refractive index and the extinction coefficient which were found to be dependent on the solvent used and strongly influenced by the photon energy. The use of Tauc’s equation for calculating the bandgap indicated possible direct and indirect optical transitions. The refractive index of the films which showed normal dispersion behavior were also analyzed using single oscillator model to determine the dispersion parameters such as the dispersion energy, average oscillator strength and wavelength, zero and high frequency dielectric constant, zero frequency refractive index, optical charge carrier density, mobility and resistivity. All the determined values are higher for ethanol than aqueous samples.
Abstract: Copper oxide thin films were deposited on Pyrex glass substrates by spray pyrolysis using ethanol and distilled water (DW) respectively as solvents. Rutherford backscattering spectroscopy results indicated that films from aqueous are thicker than those of alcoholic solutions. Rutherford backscattering spectroscopic compositional results showed the ...
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Shape Confirmation of Silver Nanoparticles from Characterization Techniques
Lipi Goswami,
Pranayee Datta
Issue:
Volume 3, Issue 2, June 2018
Pages:
23-29
Received:
10 June 2018
Accepted:
3 July 2018
Published:
31 July 2018
Abstract: The silver nanaoparticles are synthesized via green route using the tea leaves extract and the characterized samples reveal nano formation. The localized surface Plasmon resonance (LSPR) is an important characteristic of metal nanoparticles. From the study of the resonance peak in the UV-Vis spectrum, an interesting fact about the shape of nanoparticles is disclosed. The presence of two peaks in the UV-Vis spectrum gives us a theoretical indication that the shape of the nanoparticles formed is neither spherical nor uniform which exactly matches with the HRTEM pictures of the synthesized nanosamples. The HRTEM picture of the sample where one Plasmon peak is there is characterized mostly by the presence of spherical shape of nps. Moreover, there is distribution of nanoparticles with uniform shape. But the sample with two plasmon peaks in the UV-Vis spectrum is characterized by the formation of nanoparticles with non uniform shape.
Abstract: The silver nanaoparticles are synthesized via green route using the tea leaves extract and the characterized samples reveal nano formation. The localized surface Plasmon resonance (LSPR) is an important characteristic of metal nanoparticles. From the study of the resonance peak in the UV-Vis spectrum, an interesting fact about the shape of nanopart...
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Opportunities for Getting Rust Modifications on the Base of Local Resources for Corrosive Surface
Jumaniyazov Maqsud Jabbiyevich,
Ermetov Amirbek Ismailovich,
Kuranbayev Sherzod Raimberganovich
Issue:
Volume 3, Issue 2, June 2018
Pages:
30-33
Received:
19 June 2018
Accepted:
6 July 2018
Published:
8 August 2018
Abstract: In this article, 22% of the phosphoric acid content is derived from surfactants, corrosion inhibitors and industrial waste densities that have an artificial resource and study advanced rust modifiers. Adding exterior-active substances, corrosion inhibitors and technogen resources to 22% phosphate acid. In order to create optimal composition of multi-functional rust modifications and analyzing available products with chemical and physical methods. Modern physical-chemical methods, X-ray phased, IR- spectroscopic research are used. Melting diagram of 22% Н3РО4–(СН2)6N4–С5Н6О2 triple polythermal system has been investigated for the first time and modifier with new composition has been synthesized. As a result of total scientific research, the new technology of getting chemical refining modifiers from competitive multi-functional rust has been founded. Taking everything into account, results, taken on the base of studying melting level in [22% Н3РО4+78% Н2О] – (СН2)6N4–С5Н6О2 system, lead to the creation of new technology of getting new rust modifiers on the base of extractive phosphate acid, furfural alcohol and hexamethylenetetramine.
Abstract: In this article, 22% of the phosphoric acid content is derived from surfactants, corrosion inhibitors and industrial waste densities that have an artificial resource and study advanced rust modifiers. Adding exterior-active substances, corrosion inhibitors and technogen resources to 22% phosphate acid. In order to create optimal composition of mult...
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Research of the Effect of Different Dosage of Grinding Aids on Properties and Process Parameters of Steel Slag Power
Issue:
Volume 3, Issue 2, June 2018
Pages:
34-38
Received:
30 May 2018
Accepted:
1 September 2018
Published:
26 September 2018
Abstract: Because of the high hardness and poor wear resistance of steel slag, the potential cementing property of steel slag can not be effectively exerted, and the utilization rate of steel slag. Is low. In order to improve the performance and grinding efficiency of steel slag powder, different grinding aids were added in the process of steel slag grinding in laboratory and production line respectively. The effects of different grinding aids on the performance and technological parameters of steel slag powder were studied. The results show that the specific surface area of steel slag powder is higer or lower, the fluidity and the activity index increased, the energy consumption of ball mill is reduced, the energy consumption of elevator and separator increased. The following conclusions can be drawn: (1) Steel slag properties: different grinding aids have no obvious effect on the grinding fineness of steel slag powder, but can effectively improve the activity index of steel slag powder. (2) Technological parameters: different dosage of grinding aids can reduce the power consumption of ball mill and improve the energy power consumption of elevator and separator. With the increase of dosage, the process parameters will be greatly affected, so the amount of grinding aids should be effectively controlled.
Abstract: Because of the high hardness and poor wear resistance of steel slag, the potential cementing property of steel slag can not be effectively exerted, and the utilization rate of steel slag. Is low. In order to improve the performance and grinding efficiency of steel slag powder, different grinding aids were added in the process of steel slag grinding...
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