Structural, optical, vibrational and photoluminescence studies of Sn-doped MoO 3  sprayed thin films

Boukhachem, A.; Kamoun, Olfa; Mrabet, C.; Mannai, C.; Zouaghi, N.; Yumak, A.; Boubaker, K.; Amlouk, M.

doi:10.1016/j.materresbull.2015.08.011

Cited by 61 publications

(14 citation statements)

References 72 publications

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“…The model provided a good match to the measured transmittance (supplementary information SI.7). [47][48][49][50][51][52] The transmittance spectra are also in keeping with other reports from literature, and the transmittance generally decreases with increasing reduction. 27,[53][54][55] The total thickness of the films matches well to the thickness obtained by profilometry and the optical band gap of the non-treated sample is in good agreement with other observed values in the 3.2 eV region for MoO3 (SI.5).…”

Section: Resultssupporting

confidence: 89%

Tailoring properties of nanostructured MoO3−x thin films by aqueous solution deposition

Inzani

Nematollahi

Selbach

et al. 2018

Applied Surface Science

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Molybdenum oxide films are required for a large range of optical, electronic and catalytic applications, and optimal film characteristics are similarly broad. Furthermore, the layered crystal structure of MoO3 is suited to nanostructuring, which can be adapted to enhance the film properties. Here, we present a simple, aqueous route to MoO3 thin films and attain nanostructured morphologies by control of solution parameters. Smooth and homogeneous thin films were achieved by control of the molecular species in solution by pH. The sensitivity of film quality to pH was demonstrated with the addition of PVA to the solution, which resulted in large spherical particulates on the surface. Film thickness was adjusted from 10 to 60 nm, whilst maintaining good film quality, by changing the solution concentration. Moreover, the grain size and nanocrystallite orientation varied with solution concentration. The importance of film morphology is revealed in the compositional changes of the films during hydrogen reduction, with differences in breakdown of film coverage and growth of reduced phases. Furthermore, spectroscopic ellipsometry was used to determine the optical properties of the films. This revealed changes in the dielectric function and band gap that were dependent on the level of reduction. The nanoscale morphologies presented demonstrate the potential to precisely control film morphology, dimensions, oxygen stoichiometry and phase composition by a low-cost wet chemical route.

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Section: Resultssupporting

confidence: 89%

Tailoring properties of nanostructured MoO3−x thin films by aqueous solution deposition

Inzani

Nematollahi

Selbach

et al. 2018

Applied Surface Science

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“…Furthermore, this method can be selected for film production of large area with size grain controllable by controlling the doping concentration. Also, this technique leads to a large production area and it permits also the formation of thin films with possible control of oxygen vacancy by means of the use of both appropriate precursors and postannealing treatments in air [12][13][14][15].…”

Section: Methods Of Preparation and Characterization Techniquesmentioning

confidence: 99%

Magnetic Properties of Hausmannite Thin Films

Petkova¹

2017

Modern Technologies for Creating the Thin-Film Systems and Coatings

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The magnetic properties of hausmannite thin films are investigated in this chapter. The Verdet constant and angle of Faraday rotation are determined. The magnetic anisotropy of Mn 3 O 4 is explained by the measurement of the zero-field cooled (ZFC) and field cooled (FC) curves. This experiment is connected with the presentation of the ferromagnetic to superparamagnetic transition of the hausmannite.

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“…The growth and the synthesis of MoO 3 thin can be achieved via MOCVD [19], Chemical Vapor Deposition (CVD) [20], sputtering [21], Pulsed Laser ablation (PLD), vacuum evaporation [22] and spray pyrolysis [23]- [26]. Spray pyrolysis, which is a cheaper and easier method to implement, has been widely used to synthesize MoO 3 films [27], [28].…”

Section: Introductionmentioning

confidence: 99%

“…In order to improve some physical proprieties, MoO 3 was doped by various elements such as: tin [27], cobalt [29], tungsten [30], erbium [31], zinc [32], europium [17] and cadmium [33]. Cobalt is interesting due to its magnetic properties and for the behavior of the catalytic MoO 3 -layers under UV irradiation.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Some Physical Properties of Cobalt Doped MoO3 Nanofilms and Their Effects on the Degradation of the Methylene Blue Solution under UV Illumination

Benameur

Boukhachem

Ghamnia

et al. 2019

IJCEA

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Pristine and Cobalt (Co)-doped MoO 3 nanofilms were synthesized on glass substrates using the spray pyrolysis method. The nanometric pristine MoO 3 films were prepared from the 10-2 M.L-1 solution of ammonium molybdate tetrahydrate [(NH 4) 6 Mo 7 O 24 ,4H 2 O] in distilled water. Co-doping at 0.5, 0.75 and 1% was obtained by adding cobalt (II) chloride hexahydrate (Cl 2 CoH 12 O 6) in the pristine solution. The structure and the morphology of the films were investigated by X-ray diffraction and atomic force microscopy. Two pronounced (020) and (040) peaks corresponding to the orthorhombic structure phase of α-MoO 3 were detected. The AFM observations showed the formation of micro-plates parallel to the surface plane with a roughness ranging from 33 nm to 54 nm. Optical properties were investigated through reflectance, transmittance and photoluminescence measurements. The optical band gap, the Urbach energy and the refractive index were deduced from these measurements. The presence of oxygen vacancies were revealed from the interband transitions in the blue and green domains. Co-doped MoO 3 nanofilms showed ferromagnetic behavior. Photocatalytic degradation of aqueous solution of methylene blue (MB) under UV irradiation in the presence of Co-MoO 3 nanofilms has been carried out using UV-visible spectrometer by monitoring the absorption of the solution of MB. The intensity of the absorption peak recorded toward 660 nm was deceased with the increase of the UV-illumination time and the color of the initial MB solution was drastically degraded. Index Terms-MoO 3 nanofilms, magnetic properties, optical properties, photocatalytic properties, spray pyrolysis method.

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Structural, optical, vibrational and photoluminescence studies of Sn-doped MoO 3 sprayed thin films

Cited by 61 publications

References 72 publications

Tailoring properties of nanostructured MoO3−x thin films by aqueous solution deposition

Tailoring properties of nanostructured MoO3−x thin films by aqueous solution deposition

Magnetic Properties of Hausmannite Thin Films

Investigation of Some Physical Properties of Cobalt Doped MoO3 Nanofilms and Their Effects on the Degradation of the Methylene Blue Solution under UV Illumination

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