Rhodamine (B) photocatalysis under solar light on high crystalline ZnO films grown by home-made DC sputtering

Boughelout, A.; Zebbar, N.; Macaluso, Roberto; Zohour, Z.; Bensouilah, A.; Zaffora, Andrea; Aida, M.S.; Kechouane, M.; Trari, M.

doi:10.1016/j.ijleo.2018.08.061

Cited by 21 publications

(5 citation statements)

References 36 publications

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“… Production method of ZnO thin film Dye/irradiation type Time (min) Efficiency (%) Kinetics (min −1 ) Ref. Sol–gel (spin-coating) RhB/sunlight 240 93 NS 68 DC sputtering and pulsed laser deposition (PLD) RhB/sunlight 360 60.85 NS 69 DS reactive sputtering RhB/sunlight 180 38 NS 70 Sol–gel (dip-coating) RhB/UV light 240 66 NS 64 Sol–gel (spin-coating) RhB/UV light 240 50 NS 71 Sol–gel (spin-coating) RhB/UV light 120 64 NS 72 Sol–gel (spin-coating) RhB/UV light 240 32–77 1.6–6.2 × 10 –3 73 Spray pyrolysis RhB/sunlight 120 38 2.7 × 10 –3 74 Sol–gel (spin-coating) …”

Section: Resultsmentioning

confidence: 99%

Hydrophilic ZnO thin films doped with ytterbium and europium oxide

Tański

Zaborowska

Jarka

et al. 2022

Sci Rep

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Hydrophilic photocatalytically active ZnO and ZnO thin films doped with Yb2O3 and Eu2O3 (rare earth metal oxide, REM) with optical transmittance exceeding 76% in the visible light range (λ = 550 nm) were prepared by a combination of sol–gel technique, spin-coating and high temperature thermal treatment at 500 and 600 °C. The thin films were tested using advanced research methods, i.e.: morphology and topography and fractures along with approximate thickness values were investigated on scanning electron microscope (SEM), chemical composition was determined using X-ray Energy Dispersive Spectroscopy (X-ray Energy Spectroscopy), topography and roughness were measured on atomic force microscope (AFM), water contact angle values were determined by sitting water droplet method, optical properties of the fabricated materials were investigated using UV/Vis spectrophotometer. The decolorization efficiency of rhodamine B in aqueous solution was analyzed over a period of 190 min, obtaining degradation rates of: 54.7% and 43.1%, for ZnO and ZnO coatings doped with ytterbium oxide and europium oxide, respectively. The roughness of thin hybrid coatings did not exceed 50 nm, ensuring effective absorption of electromagnetic radiation by the layers. The methodology presented by the authors for the fabrication of thin hybrid films characterized by the key properties of self-cleaning coatings can be successfully applied to coatings of photovoltaic panels and architectural glass structures.

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Section: Resultsmentioning

confidence: 99%

Hydrophilic ZnO thin films doped with ytterbium and europium oxide

Tański

Zaborowska

Jarka

et al. 2022

Sci Rep

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“… 16 Recently, methods based on advanced oxidation processes (AOPs), which largely depend on the use of reactive oxygen species (ROS) such as hydroxyl radicals and superoxide radicals as powerful oxidants, have been identified to be capable of total removal of textile dyes from wastewater. 17 A prominent example of AOPs is the photocatalysis process which involves the use of metal oxide semiconductors such as TiO 2 , 18 ZnO, 19 BiVO 4 , 20 Bi 2 WO 6 , 21 Cu 2 O 22 and WO 3 . 23 However, the problems of rapid recombination of charge carriers limit the success of photocatalytic removal of textile dyes in wastewater.…”

Section: Introductionmentioning

confidence: 99%

The application of photoelectrocatalysis in the degradation of rhodamine B in aqueous solutions: a review

et al. 2022

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“…ZnO is regarded as an attractive material for near-UV light-emitting diodes (LEDs) due to the wide direct bandgap (3.37 eV), the large exciton binding energy (60 meV), and several interesting optic and optoelectronic properties [1,2] which might allow for efficient near-bandgap recombination and laser working at room temperature [3]. ZnO is also considered, together with GaN, for the fabrication of both blue [4][5][6][7] and white LEDs, with and without any phosphor or dye [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Progress in Violet Light-Emitting Diodes Based on ZnO/GaN Heterojunction

et al. 2020

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Progress in light-emitting diodes (LEDs) based on ZnO/GaN heterojunctions has run into several obstacles during the last twenty years. While both the energy bandgap and lattice parameter of the two semiconductors are favorable to the development of such devices, other features related to the electrical and structural properties of the GaN layer prevent an efficient radiative recombination. This work illustrates some advances made on ZnO/GaN-based LEDs, by using high-thickness GaN layers for the p-region of the device and an ad hoc device topology. Heterojunction LEDs consist of a quasicoalesced non-intentionally doped ZnO nanorod layer deposited by chemical bath deposition onto a metal–organic vapor-phase epitaxy -grown epitaxial layer of p-doped GaN. Circular 200 μm-sized violet-emitting LEDs with a p-n contact distance as low as 3 μm exhibit a turn-on voltage of 3 V, and an emitting optical power at 395 nm of a few microwatts. Electroluminescence spectrum investigation shows that the emissive process can be ascribed to four different recombination transitions, dominated by the electron-hole recombinations on the ZnO side.

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Rhodamine (B) photocatalysis under solar light on high crystalline ZnO films grown by home-made DC sputtering

Cited by 21 publications

References 36 publications

Hydrophilic ZnO thin films doped with ytterbium and europium oxide

Hydrophilic ZnO thin films doped with ytterbium and europium oxide

The application of photoelectrocatalysis in the degradation of rhodamine B in aqueous solutions: a review

Progress in Violet Light-Emitting Diodes Based on ZnO/GaN Heterojunction

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