Characterization of nano-crystalline Co-La mixed oxide thin films prepared by the spray pyrolysis technique

Aboud, Ahmed A.; Abdel-Hakima, Samy; Ali, M. Younus; Afify, H. H.; Revaprasadu, Neerish

doi:10.1016/j.rinp.2019.01.053

Cited by 7 publications

(5 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In all films the intensities of the recorded peaks are noticed to be week. Such small intensities of the diffraction peaks has been recorded before in our previous work [19,40]. The small peaks intensities could be attributed to the high cooling rate the films subjected to since all films are taken directly from the hot surface (450 o C) which gives a high rate of cooling since the film goes to room temperature in less than a minute.…”

Section: X-ray Diffraction and Microstructural Studysupporting

confidence: 60%

“…For the pure Co3O4 film, the estimated activation energy was found to be 0.11eV. Aboud et.al [19] studied the DC conductivity of pure Co3O4 thin films deposited by spray pyrolysis. They found that the activation energy is 0.189 eV.…”

Section: Conductivity Analysismentioning

confidence: 99%

“…Cobaltosic oxide (Co3O4) is most promising for PEC water splitting. It is a p-type semiconductor with a spinel structure and a mixed-valence (Co 3+ , Co 2+ ) where the Co 3+ ion occupies octahedral sites and the Co 2+ ion occupies the lattice tetrahedral sites [19]. It is widely used in many scientific applications such as biosensors [20], gas sensor [21], lithium-ion batteries [22], supercapacitors [23],…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Outstanding stability and photoelectrochemical catalytic performance of (Fe, Ni) co-doped Co3O4 photoelectrodes for solar hydrogen production

Abdelmoneim

Naji

Wagenaars

et al. 2021

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

Section: X-ray Diffraction and Microstructural Studysupporting

confidence: 60%

Section: Conductivity Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Outstanding stability and photoelectrochemical catalytic performance of (Fe, Ni) co-doped Co3O4 photoelectrodes for solar hydrogen production

Abdelmoneim

Naji

Wagenaars

et al. 2021

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

“…The other is the parallel orientation which parallels the film surfaces. These changes in the preferred orientation of thin film grown on amorphous substrates may relate to changes in the nucleation process and growth mechanism [24][25][26][27][28][29]. In all films, no other diffraction peaks are detected which confirms the singularity of the ZnO phase.…”

Section: The X-ray Diffraction (Xrd) Analysismentioning

confidence: 72%

Synthesis Characterization and Gamma Irradiation Effect on Cobalt Doped ZnO Diluted Magnetic Semiconductor

Sharaf¹

2022

Arab Journal of Nuclear Sciences and Applications

View full text Add to dashboard Cite

In this manuscript, Cobalt (Co)-doped to Zinc Oxide (ZnO) samples prepared as thin films. These samples were obtained by utilizing spray pyrolysis have different concentrations of Cobalt. For investigating the effect of Co concentration on the thin films samples' physical properties, Different experimental techniques are employed. Such as Scanning Electron Microscope (SEM), X-ray diffraction, and optical spectroscopy. The grain size has been obtained using Scherrer's equation. From the obtained results, one can notice that the grain size behavior is non-linearly with the Co-concentration level. Electron Spin Resonance (ESR) is involved to observe the resonance absorption of microwave radiation of these thin films. It measures the spins of an electron of a molecule or an atom in a magnetic field. The study is performed before and after irradiation doses of 1 KGy and 3 KGy.The ESR signal shows the ferromagnetic response at room temperature which is improved after irradiation with Gamma-ray. The optical band gap of pure ZnO film was found to be 3.25 eV and the minimum bandgap is 3.11 for 1wt%. The existence of Co in the obtained film was confirmed by Energy Dispersive X-Ray (EDX) data. From the obtained results, the percentage of Co is increasing from 1.9% to 5.4% when the wt% is raising. In addition, the effect of the ionizing radiation doses; 1KGy and 3 KGy, on the magnetic and structural properties are investigated. As a result, Magnetic measurements for all prepared samples show a Room Temperature Ferromagnetic (RTFM) behaviour. Finally, increasing Co concentration and Gammaray irradiation dose will have a notified change on the ESR signal.

show abstract

“…The obtained values of the absorption coefficient were used to calculate the optical band gap and the nature of the optical transition. The optical band gap was calculated using Tauc's equation [50];…”

Section: Optical Propertiesmentioning

confidence: 99%

Enhancement of UV detection properties of ZnO thin films via Ni doping

Aboud

Bukhari²,

Al-Ahmad

2023

Phys. Scr.

View full text Add to dashboard Cite

In this work pure and Ni-doped ZnO thin films have been deposited onto glass substrates using the spray pyrolysis technique. All films were deposited at constant deposition parameters but the Ni content was changed from 0 to 7 weight (wt) %. XRD results revealed the formation of a hexagonal ZnO phase whilst no other phases were detected. The crystallite size was determined using Scherrer's equation and found to be 45.9 nm for the pure film. Scanning electron microscope images show the formation of irregular grains with a broad size distribution. The existence of Ni in the deposited films was confirmed using energy dispersive spectroscopy (EDX), where the Ni content in the film increases as the weight % increases in the starting solution. The optical band gap was determined and found to be 3.3 eV for the pure ZnO films, which was reduced with Ni doping. The performance of the deposited films for UV radiation has been examined for the 365 nm wavelength and at different applied potentials and constant power. The rise and decay times for doped films were observed to exhibit faster rise/recovery as compared to pure films. The minimum response time was found to be 0.09 s for Ni-7wt% film and the minimum decay time is 0.07 s for Ni-1wt%.

show abstract

Characterization of nano-crystalline Co-La mixed oxide thin films prepared by the spray pyrolysis technique

Cited by 7 publications

References 49 publications

Outstanding stability and photoelectrochemical catalytic performance of (Fe, Ni) co-doped Co3O4 photoelectrodes for solar hydrogen production

Outstanding stability and photoelectrochemical catalytic performance of (Fe, Ni) co-doped Co3O4 photoelectrodes for solar hydrogen production

Synthesis Characterization and Gamma Irradiation Effect on Cobalt Doped ZnO Diluted Magnetic Semiconductor

Enhancement of UV detection properties of ZnO thin films via Ni doping

Contact Info

Product

Resources

About