200 MeV Ag15+ ion beam irradiation effects on spray deposited 5 wt% ‘Li’ doped V2O5 thin film

Kovendhan, M.; Joseph, D. Paul; Manimuthu, P.; Sendilkumar, A.; Asokan, K.; Venkateswaran, C.; Mohan, R.

doi:10.1063/1.4947946

Cited by 4 publications

(3 citation statements)

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“…Same results have been reported in previous works on ZnO and WO3 doped with Lithium [39,40] where localized states appear in the band gap due to Li induced-defects. The analysis of Urbach energy shows that the width of localized states increases with Li content.…”

Section: Optical Studysupporting

confidence: 88%

Enhancement of photocatalytic degradation of MB by recyclable Li/Mn3O4 thin films

Amara

Larbi

Mahdhi³

et al. 2021

J Mater Sci: Mater Electron

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Thin films of physical--mixture of Hausmannite Mn3O4 and lithium (Li) are synthesized by spray pyrolysis technique. Structural, morphological, optical, electrical, wettability and photocatalytic properties have been investigated. X-ray diffraction (XRD) and Raman spectra, Scanning electron microscope (SEM) images and electrical measurements show that Li nanoparticles are formed both on top surface of the film and inside grain boundaries.Bandgap and Urbach energies and optical relaxation time have been determined from transmittance T and reflectance R spectra. Impedance spectroscopy shows that charge separation increases with Li content, which improves photocatalytic efficiency of the film.The best photocatalytic efficiency is obtained for Li/Mn ratio of 15%. Indeed, the degradation of methylene blue (MB) under ultraviolet (UV) and visible light exposure, is improved by a factor of 5.7 and 2.4 respectively, when compared to undoped Mn3O4. In addition, this film exhibits a high photostability (10 cycles consecutively) under solar light. On the other hand, hydrophobicity reveals the hydrophilic character of the films.

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Section: Optical Studysupporting

confidence: 88%

Enhancement of photocatalytic degradation of MB by recyclable Li/Mn3O4 thin films

Amara

Larbi

Mahdhi³

et al. 2021

J Mater Sci: Mater Electron

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show abstract

“…Same results have been reported in previous works on ZnO and WO3 doped with Lithium [39,40] where localized states appear in the band gap due to Li induced-defects. On the other hand, dielectric calculations are used to determine optical relaxation time op which correspond to the lifetime of photo-excited carriers.…”

Section: Optical Studysupporting

confidence: 88%

Enhancement of Photocatalytic Degradation of MB by Recyclable Li/Mn3O4 Thin films.

Amara

Larbi

Mahdhi

et al. 2021

Preprint

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Thin films of physical--mixture of Hausmannite Mn3O4 and lithium (Li) are synthesized by spray pyrolysis technique. Structural, morphological, optical, electrical, wettability and photocatalytic properties have been investigated. X-ray diffraction (XRD) and Raman spectra, Scanning electron microscope (SEM) images and electrical measurements show that Li nanoparticles are formed both on top surface of the film and inside grain boundaries. Bandgap and Urbach energies and optical relaxation time have been determined from transmittance T and reflectance R spectra. Impedance spectroscopy shows that charge separation increases with Li content, which improves photocatalytic efficiency of the film. The best photocatalytic efficiency is obtained for Li/Mn ratio of 15%. Indeed, the degradation of methylene blue (MB) under ultraviolet (UV) and visible light exposure, is improved by a factor of 5.7 and 2.4 respectively, when compared to undoped Mn3O4. In addition, this film exhibits a high photostability (10 cycles consecutively) under solar light. On the other hand, hydrophobicity reveals the hydrophilic character of the films.

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“…51 Then, two classes of X-chromic materials based on oxide are studied in parallel. The first one is based on a chemical reaction associated with a redox reaction (for illustration see the V2O5 oxide for electrochromism, [30][31][32][33][34][35][36] or WO3 oxide for electrochromic, [37][38][39][40] or photochromic, [41][42][43][44] properties for the smart windows concept). The second class of material for which the change of optical properties is associated with a phase transition allowing piezo-& thermo-chromic properties (see Fig.…”

mentioning

confidence: 99%

Probing Co- and Fe-doped LaMO₃(M = Ga, Al) perovskites as thermal sensors

et al. 2018

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The synthesis of a Co-doped or Fe-doped La(Ga,Al)O perovskite via the Pechini process aimed to achieve a color change induced by temperature and associated with spin crossover (SCO). In Fe-doped samples, iron was shown to be in the high-spin state, whereas SCO from the low-spin to the high-spin configuration was detected in Co-doped compounds when the temperature increased. Fe-doped compounds clearly adopted the high-spin configuration even down to 4 K on the basis of Mössbauer spectroscopic analysis. The original SCO phenomenon in the Co-doped compounds LaGaCoO (0 < x < 0.1) was evidenced and discussed on the basis of in situ X-ray diffraction analysis and UV-vis spectroscopy. This SCO is progressive as a function of temperature and occurs over a broad range of temperatures between roughly 300 °C and 600 °C. The determination of a crystal field strength of about 2 eV and a Racah parameter B of about 500 cm for Co (3d) ions show that these values allow the occurrence of SCO. Hence, this study shows the possibility of using LaGaCoO compounds as thermal sensors at low Co contents (x = 0.02). The competition between steric and electronic effects in LaGaO in which Co is stabilized in the LS state shows that electronic effects with the creation of M-O covalent bonds are predominant and contribute to the stabilization of a high crystal field around Co (LS) although its ionic radius is smaller in comparison with that of Ga.

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200 MeV Ag15+ ion beam irradiation effects on spray deposited 5 wt% ‘Li’ doped V2O5 thin film

Cited by 4 publications

References 10 publications

Enhancement of photocatalytic degradation of MB by recyclable Li/Mn3O4 thin films

Enhancement of photocatalytic degradation of MB by recyclable Li/Mn3O4 thin films

Enhancement of Photocatalytic Degradation of MB by Recyclable Li/Mn3O4 Thin films.

Probing Co- and Fe-doped LaMO₃(M = Ga, Al) perovskites as thermal sensors

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200 MeV Ag15+ ion beam irradiation effects on spray deposited 5 wt% ‘Li’ doped V2O5 thin film

Cited by 4 publications

References 10 publications

Enhancement of photocatalytic degradation of MB by recyclable Li/Mn3O4 thin films

Enhancement of photocatalytic degradation of MB by recyclable Li/Mn3O4 thin films

Enhancement of Photocatalytic Degradation of MB by Recyclable Li/Mn3O4 Thin films.

Probing Co- and Fe-doped LaMO3(M = Ga, Al) perovskites as thermal sensors

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Probing Co- and Fe-doped LaMO₃(M = Ga, Al) perovskites as thermal sensors