Effect of Zn Concentration On Structural and Optical Proprieties Of ZNO Thin Films Deposited By Spray Pyrolysis.

Alami, Z.Yamlahi; Salem, M.; Gaidi, M.

doi:10.5121/aeij.2015.2402

Cited by 23 publications

(13 citation statements)

References 21 publications

(26 reference statements)

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“…The observed absorption spectrum of synthesized nanoparticles matches the absorption spectrum of previously reported ZnO NPs, as mentioned in Kayani et al [31]. The spectrum is also in agreement with those obtained for ZnO NPs produced by synthetic methods [32][33][34][35][36][37], exhibiting a sharp, intense peak in the UV region at 376 nm and a small number of little, extreme, sharp peaks in between 250-350 nm. This is the characteristic absorption peak of ZnO.…”

Section: Optical Property Studiessupporting

confidence: 90%

“…The increase in precursor concentration leads to the enhancement in the preferential orientation of the intense peak, which specified the improvement in crystallinity [35,36]. The crystallite size found a maximum for 0.1 M precursor solution, which is around 49.25 nm.…”

Section: The Effect Of Concentration Of Zn(no3)2 On Crystallite Size Of Zno Npsmentioning

confidence: 92%

“…The generated electrons react with adsorbed oxygen on the catalyst to give O2 •− radical anion, and the water from the solution combines with the holes to produce OH• radicals. These generated radicals undergo the reduction and oxidation reaction while reacting with dyes [32][33][34][35][36][37]. However, O2 •− radical anion reacts further to generate HOO•, OH − radicals, and OH − anions, and these active species of oxygen are responsible for the degradation of MB dye.…”

Section: Mechanism Of Photo-degradability Of Mb By Zno Catalystmentioning

confidence: 99%

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Cinnamomum tamala Leaf Extract Stabilized Zinc Oxide Nanoparticles: A Promising Photocatalyst for Methylene Blue Degradation

et al. 2021

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A facile green synthetic method is proposed for the synthesis of zinc oxide nanoparticles (ZnO NPs) using the bio-template Cinnamomum tamala (C. tamala) leaves extract. The morphological, functional, and structural characterization of synthesized ZnO NPs were studied by adopting different techniques such as energy dispersive X-ray analysis (EDX), high-resolution transmission electron microscopy (HR-TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), UV-Visible spectroscopy, fourier transform infrared (FTIR) spectroscopy, raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). The fabricated ZnO NPs exhibit an average size of 35 nm, with a hexagonal nanostructure. Further, the well-characterized ZnO NPs were employed for the photocatalytic degradation of methylene blue (MB) in an aqueous solution. The photocatalytic activity was analyzed by changing the various physicochemical factors such as reaction time, amount of photocatalyst, precursor concentration, and calcination temperature of the ZnO NPs. All the studies suggest that the ZnO synthesized through the green protocol exhibits excellent photocatalytic potency against the dye molecules.

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Section: Optical Property Studiessupporting

confidence: 90%

Section: The Effect Of Concentration Of Zn(no3)2 On Crystallite Size Of Zno Npsmentioning

confidence: 92%

Section: Mechanism Of Photo-degradability Of Mb By Zno Catalystmentioning

confidence: 99%

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Cinnamomum tamala Leaf Extract Stabilized Zinc Oxide Nanoparticles: A Promising Photocatalyst for Methylene Blue Degradation

et al. 2021

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“…where the A 1 , E 1 , and E 2 modes are first-order Raman active, while the B 1 modes are Raman inactive [24]. Figure 4 shows Raman spectra of ZnO thin films deposited in different precursor concentrations.…”

Section: Raman Spectroscopymentioning

confidence: 99%

Room-temperature BTEX sensing characterization of nanostructured ZnO thin films

Nagaraju

Vijayakumar

Reddy

2019

Journal of Asian Ceramic Societies

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Nanostructured zinc oxide (ZnO) thin films were deposited on glass substrates using various molar concentrations of zinc acetate dihydrate as the starting precursor at 400°C by the spray pyrolysis technique. The structural, morphological, and optical properties of the samples were investigated. X-ray diffraction studies showed thin films with a polycrystalline nature of the hexagonal wurtzite phase type. The preferred orientation was observed along the (002) direction. The crystallite size increased from 16.18nm to 20.42nm with increases in the molar concentration from 0.1M to 0.3M and then decreased further to 17.85nm at a molar concentration of 0.4M. SEM micrographs showed significant changes in the zinc oxide thin films with increases in the molar concentration of the precursor. Room-temperature Raman spectra confirmed typical electron-phonon coupling in the ZnO thin films. The optical band gap of the zinc oxide thin films was calculated using the Tauc plot. The sensitivity and selectivity of such toxic volatile organic vapors as benzene, toluene, ethylbenzene, and xylene (BTEX) were studied at room-temperature and reported.

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“…a study on the manufacture of thin films with optimum precursor concentrations needs to be carried out in order to obtain the most optimum concentration of precursors which produces an energy band gap that is suitable for its application for photocatalysts., because the film properties are reported to deteriorate at certain precursor concentrations. The results showed that at a concentration of 0.015M the band gap energy reached 3.64eV and has low crystal quality [18].…”

Section: Introductionmentioning

confidence: 98%

Analysis of the optical properties of ZnO thin films deposited on a glass substrate by the So-gel method

Amananti

Ardiyanto

Sutanto

et al. 2022

J. Nat. Scien. & Math. Res.

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Zinc oxide (ZnO) has attracted the attention of researchers as a photocatalyst material, because ZnO has a wide direct band gap (3.37 eV) and is a semiconductor material with a large excitation binding energy (60 meV). ZnO is a photocatalyst that has many advantages, namely cheap, non-toxic, and theoretically very active under UV irradiation. The most interesting thing about ZnO semiconductor compared to other semiconductors is that ZnO can absorb most of the solar spectrum. However, there is a weakness of the ZnO semiconductor, namely the very fast recombination of charge carriers and the ZnO semiconductor has a low efficiency in the visible region which causes the ZnO semiconductor to have a wide band gap. that is the weakness of ZnO. it is necessary to choose the right method to overcome this deficiency of ZnO. one way that can be done is to increase the photocatalytic ability of zinc oxide, it is necessary to develop it in the manufacture of thin films. The method used in the manufacture of Thin Film is using the sol-gel spray coating method. the first stage is through the manufacture of ZnO precursors by dissolving zinc acetate dehydrate with isopropanol solvent through stirring. then the second stage by adding Monoethanolamine. This stirring lasted for 30 minutes at a temperature of 70°C, the precursor concentration was prepared with three different concentrations which included concentrations of 0.1, 0.3, and 0.5 M. ZnO precursor deposited on the substrate glass is blown at 400 °C. Optical properties are carried out by recording the transmittance and absorbance which are affected by increasing concentrations. The optical transmission spectra show that the transmission increases with decreasing concentration and the maximum transmission in the visible region is about 90% for ZnO thin films prepared with 0.1 M. The optical band gap value produced by the thin film of 0.1 M precursor concentration resulted in an energy band gap of 3.11 eV; thin films of 0.3 M precursor concentration produced an energy band gap of 3.07 eV; and thin film of 0.5M precursor concentration produced an energy band gap of 3.06 eV.©2022 JNSMR UIN Walisongo. All rights reserved.

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Effect of Zn Concentration On Structural and Optical Proprieties Of ZNO Thin Films Deposited By Spray Pyrolysis.

Cited by 23 publications

References 21 publications

Cinnamomum tamala Leaf Extract Stabilized Zinc Oxide Nanoparticles: A Promising Photocatalyst for Methylene Blue Degradation

Cinnamomum tamala Leaf Extract Stabilized Zinc Oxide Nanoparticles: A Promising Photocatalyst for Methylene Blue Degradation

Room-temperature BTEX sensing characterization of nanostructured ZnO thin films

Analysis of the optical properties of ZnO thin films deposited on a glass substrate by the So-gel method

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