Photocatalytic oxidation of methyl orange in presence of titanium dioxide in aqueous suspension. Part I: Parametric study

Guettai, Nadia; Amar, H. Aït

doi:10.1016/j.desal.2005.04.048

Cited by 201 publications

(155 citation statements)

References 27 publications

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“…Some applications include: white pigment, gas sensor, corrosion inhibitor and optical coating (Sankapal et al, 2005), solar cells (Regan and Grätzel, 1991), high constant dielectrics and high resistivity dielectrics (Sankapal et al, 2005). TiO 2 has also been used to decompose carbon dioxide and generate hydrogen gas (Fox and Dulay, 1993), decompose pollutants (Hidalgo et al, 2007), and as a photocatalyst (Bouzaida et al, 2004;Guettai and Amar, 2005;Ho and Yu, 2006;Sahel et al, 2007;Sleiman et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Temperature and reaction time effects on the structural properties of titanium dioxide nanopowders obtained via the hydrothermal method

Jahn

Carreño

Foletto

2011

Braz. J. Chem. Eng.

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-An investigation was carried out on the synthesis of titanium dioxide nanopowders via the hydrothermal method, examining the influence of temperature (150ºC and 200ºC) and reaction time (6 to 36 h). The resulting powders were characterized by X-ray diffraction, infrared absorption spectrophotometry, transmission electron micrographs and surface area. The X-ray diffraction revealed that there was formation of a pure crystalline phase, consisting only of anatase for all conditions of synthesis. Both temperature and reaction time proved to have a slight influence on the crystallite size (from 9 to 17 nm) and a significant influence on the surface area (from 86 to 168 m 2 .g -1 ).

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Section: Introductionmentioning

confidence: 99%

Temperature and reaction time effects on the structural properties of titanium dioxide nanopowders obtained via the hydrothermal method

Jahn

Carreño

Foletto

2011

Braz. J. Chem. Eng.

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“…Currently, it is widely used because of the amount of information available in the literature and the technical ease involved in the tracing or screening of the reactive concentration over time. [16][17][18] In this study, a simple methodology for the preparation of porous thin films supported on glass slides was developed, using PEG as a polymeric additive. The multilayered films were characterized using the following techniques: thermogravimetric analysis (TGA-DTG), X-ray diffraction (XRD), UV-Vis spectroscopy and scanning electron microscopy (SEM).…”

Section: Introductionmentioning

confidence: 99%

Enhanced photocatalytic activity of TiO2 films by modification with polyethylene glycol

Ramírez‐Santos¹,

Acevedo–Peña²,

Córdoba³

2012

Quím. Nova

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Recebido em 15/1/12; aceito em 22/6/12; publicado na web em 18/9/12 Titanium dioxide porous thin films on the Anatase phase were deposited onto glass slides by the sol-gel method assisted with polyethylene glycol (PEG). The dip-coated films were characterized using scanning electron microscopy (SEM), thermogravimetric analysis (TGA and DTG), UV-visible spectroscopy and X-ray diffraction (XRD). The photocatalytic activity of the films was determined by means of methyl-orange oxidation tests. The resultant PEG-modified films were crack-free and developed a porous structure after calcination at 500 °C. Photo-oxidation tests showed the dependency of catalytic activity of the films on the number of layers (thickness) and porosity, i.e. of the interfacial area.

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“…Depending on the property of the film layer a specific photocatalytic activity test, dry or wet is selected. For instance, whilst stearic acid (dry method) can produce non-continuous contacts between the stearic acid and the surface of the film [29][30][31][32][33], using methyl orange [34][35][36] or methylene blue [37] dyes can result in the production of continuous contact between the surface of the film and the solution. The latter method suits a photocatalytic test in which an electron exchange is involved and that was the major testing technique used for this study.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Activity of Reactively Sputtered Titania Coatings Deposited Using a Full Face Erosion Magnetron

et al. 2013

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Titanium dioxide (titania) is widely used as a photocatalyst for its moderate band gap, high photoactivity, recyclability, nontoxicity, low cost and its significant chemical stability. The anatase phase of titania is known to show the highest photocatalytic activity, however, the presence of this phase alone is not sufficient for sustained activity. In this study TiO 2 coatings were deposited onto glass substrates by mid-frequency pulsed magnetron sputtering from metallic targets in reactive mode using a Full Face Erosion (FFE) magnetron, which allows the magnetic field to be modulated during the deposition process. The as-deposited coatings were analysed by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and micro-Raman spectroscopy. Selected coatings were then annealed at temperatures in the range of 400-700 °C and re-analysed. The photocatalytic activity of the coatings was investigated through measurements of the degradation of organic dyes, such as methyl orange, under the influence of UV and fluorescent light sources. It has been demonstrated that, after annealing, the pulsed magnetron sputtering process produced photo-active surfaces and that the activity of the coatings under exposure to fluorescent lamps was some 35%-45% of that observed under exposure to UV lamps.

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Photocatalytic oxidation of methyl orange in presence of titanium dioxide in aqueous suspension. Part I: Parametric study

Cited by 201 publications

References 27 publications

Temperature and reaction time effects on the structural properties of titanium dioxide nanopowders obtained via the hydrothermal method

Temperature and reaction time effects on the structural properties of titanium dioxide nanopowders obtained via the hydrothermal method

Enhanced photocatalytic activity of TiO2 films by modification with polyethylene glycol

Photocatalytic Activity of Reactively Sputtered Titania Coatings Deposited Using a Full Face Erosion Magnetron

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