Comparative study of TiO2 and ZnO photocatalysts for the enhancement of ozone generation by surface dielectric barrier discharge in air

Pekárek, Stanislav; Mikeš, Jan; Krýsa, Josef

doi:10.1016/j.apcata.2015.06.003

Cited by 40 publications

(11 citation statements)

References 16 publications

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“…Heterogenous photocatalysts, namely, zinc oxide (ZnO) [3][4][5], titanium dioxide (TiO 2 ) [5][6][7][8], tungsten trioxide (WO 3 ) [9], ferric oxide (Fe 2 O 3 ) [10,11], copper oxide (Cu 2 O) [12], and tin dioxide (SnO 2 ) [13][14][15][16][17][18], have gained huge interest for environmental applications such as water disinfection, hazardous remediation, and water purification.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Activity of Vanadium-Doped SnO₂ Nanoparticles in Rhodamine B Degradation

Letifi

Litaiem

Dridi

et al. 2019

Advances in Condensed Matter Physics

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In this paper, we have reported a novel photocatalytic study of vanadium-doped SnO2 nanoparticles (SnO2: V NPs) in rhodamine B degradation. These NPs have been prepared with vanadium concentrations varying from 0% to 4% via the coprecipitation method. Structural, morphological, and optical properties of the prepared nanoparticles have been investigated by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, transmission electron microscope (TEM), and UV-Vis and photoluminescence (PL) spectroscopy. Structural properties showed that both undoped and SnO2: V NPs exhibited the tetragonal structure, and the average crystal size has been decreased from 20 nm to 10 nm with the increasing doping level of vanadium. Optical studies showed that the absorption edge of SnO2: V NPs showed a redshift with the increasing vanadium concentration. This redshift leads to the decrease in the optical band gap from 3.25 eV to 2.55 eV. A quenching in luminescence intensity has been observed in SnO2: V NPs, as compared to the undoped sample. Rhodamine B dye (RhB) has been used to study the photocatalytic degradation of all synthesized NPs. As compared to undoped SnO2 NPs, the photocatalytic activity of SnO2: V NPs has been improved. RhB dye was considerably degraded by 95% within 150 min over on the SnO2: V NPs.

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Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Activity of Vanadium-Doped SnO₂ Nanoparticles in Rhodamine B Degradation

Letifi

Litaiem

Dridi

et al. 2019

Advances in Condensed Matter Physics

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“…There are three possible routes to generate ozone. First, discharge can produce ozone via the several paths, which are electron impact dissociation of molecules and reactions between the dissociated molecules and other gas species [32,38]. The possible reactions have been proposed by previous research [32,[38][39][40], and they are mainly considered as:…”

Section: Toluene Removal Testsmentioning

confidence: 99%

Atmospheric pressure plasma corona enhanced by photoionizer for degradation of VOCs

Jung¹,

Fang²,

Chadha³

et al. 2018

J. Phys. D: Appl. Phys.

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A hybrid titanium dioxide (TiO 2 )-integrated photoionization enhanced atmospheric pressure plasma corona system was developed for effective toluene removal. The individual and synergistic effects of a corona discharge, a photoionizer irradiation with a soft x-ray source, and a TiO 2 photocatalyst on toluene removal were investigated by performing various experiments. Voltage-current characteristics revealed a lower corona inception voltage and a higher current at the same voltage caused by combining the corona discharge, the photoionizer irradiation, and the TiO 2 photocatalyst. The toluene removal efficiency was significantly enhanced by combining the corona discharge, the photoionizer irradiation, and the TiO 2 photocatalyst: (corona discharge + photoionizer irradiation + TiO 2 : ~86.0%) > (corona discharge + TiO 2 : ~70.8%) > (corona discharge + photoionizer irradiation: ~51.1%) > (corona discharge: ~43.8%). The toluene removal efficiency increased with an increase in the photoionizer energy. These trends were mainly due to the degree of ion generation in the system. Corona discharge generates ions inside the system, and ion concentration increases as the applied voltage is increased. The photoionizer creates positive and negative ions, which lowers the corona inception voltage and enhances the current. The TiO 2 film also enhances ion production under corona discharge, and is activated by photoionizer irradiation to create additional electron-hole pairs. In addition, the rougher surface induced by the morphology change in TiO 2 under corona discharge has a positive effect on toluene removal.

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“…A significant disadvantage of ZnO and TiO 2 is their wide bandgap (3.2 eV for anatase TiO 2 and 3.3 eV for ZnO) [29]. Therefore, UV radiation (<380 nm) is needed to bring a nanoparticle to an excited state, while UV itself manifests sterilizing properties and is unsafe for the human body [30].…”

Section: Introductionmentioning

confidence: 99%

Bactericidal Activity of Multilayered Hybrid Structures Comprising Titania Nanoparticles and CdSe Quantum Dots under Visible Light

et al. 2021

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Titania nanoparticle/CdSe quantum dot hybrid structures are a promising bactericidal coating that exhibits a pronounced effect against light-sensitive bacteria. Here, we report the results of a comprehensive study of the photophysical properties and bactericidal functionality of these hybrid structures on various bacterial strains. We found that our structures provide the efficient generation of superoxide anions under the action of visible light due to electron transfer from QDs to titania nanoparticles with ~60% efficiency. We also tested the antibacterial activity of hybrid structures on five strains of bacteria. The formed structures combined with visible light irradiation effectively inhibit the growth of Escherichia coli, Bacillus subtilis, and Mycobacterium smegmatis bacteria, the last of which is a photosensitive causative agent model of tuberculosis.

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Comparative study of TiO2 and ZnO photocatalysts for the enhancement of ozone generation by surface dielectric barrier discharge in air

Cited by 40 publications

References 16 publications

Enhanced Photocatalytic Activity of Vanadium-Doped SnO₂ Nanoparticles in Rhodamine B Degradation

Enhanced Photocatalytic Activity of Vanadium-Doped SnO₂ Nanoparticles in Rhodamine B Degradation

Atmospheric pressure plasma corona enhanced by photoionizer for degradation of VOCs

Bactericidal Activity of Multilayered Hybrid Structures Comprising Titania Nanoparticles and CdSe Quantum Dots under Visible Light

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Comparative study of TiO2 and ZnO photocatalysts for the enhancement of ozone generation by surface dielectric barrier discharge in air

Cited by 40 publications

References 16 publications

Enhanced Photocatalytic Activity of Vanadium-Doped SnO2 Nanoparticles in Rhodamine B Degradation

Enhanced Photocatalytic Activity of Vanadium-Doped SnO2 Nanoparticles in Rhodamine B Degradation

Atmospheric pressure plasma corona enhanced by photoionizer for degradation of VOCs

Bactericidal Activity of Multilayered Hybrid Structures Comprising Titania Nanoparticles and CdSe Quantum Dots under Visible Light

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Enhanced Photocatalytic Activity of Vanadium-Doped SnO₂ Nanoparticles in Rhodamine B Degradation

Enhanced Photocatalytic Activity of Vanadium-Doped SnO₂ Nanoparticles in Rhodamine B Degradation