Preparation and characterization of TiO2 photocatalysts supported on various rigid supports (glass, quartz and stainless steel). Comparative studies of photocatalytic activity in water purification

Fernández, A.; Lassaletta, G.; Jiménez, Víctor; Justo, A.; González-Elipe, A.R.; Herrmann, Jean-Marie; Tahiri, Halima; Ait‐Ichou, Y.

doi:10.1016/0926-3373(95)00026-7

Cited by 484 publications

(204 citation statements)

References 25 publications

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“…For instance, for titania-based doped coatings the photocatalytic degradation of malic acid under UV and visible light irradiation were proposed [26,27]. Also, it was demonstrated that titania photocatalysts exhibit a significant level of activity against a broad spectrum of microorganisms [28].…”

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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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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“…Rutile sand, and to a lesser extent zircon sand, exhibited significant levels of iron impurities as shown by XRF analysis. Under certain conditions, Fe, and other transition metals [40][41][42][43] and alkali impurities, [44][45][46] have been reported to impair photocatalytic activity and it is possible the presence of such impurities in rutile and zircon sands contributed to the poor bactericidal performance of TiO 2 coatings supported on these materials.…”

Section: Photocatalytic Performancementioning

confidence: 99%

Sand Supported Mixed‐Phase TiO₂ Photocatalysts for Water Decontamination Applications

Hanaor

Sorrell

2013

Adv Eng Mater

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Abstract:Using an organometallic precursor, TiO 2 coatings were fabricated on surfaces of quartz, zircon and rutile sands. X-ray Diffraction, X-ray Fluorescence, UV-Vis spectroscopy and surface area measurement were used to characterise support materials. The phase composition and morphology of the coatings were characterised by laser Raman spectroscopy and SEM respectively. A packed bed reactor was used to study the inactivation of Escherichia coli in recirculating water by the supported photocatalysts. It was found that the sand grains were well coated with a homogenous layer of TiO 2 and coatings were well adhered, exhibiting a mixed anatase-rutile composition after firing at 850°C.Photocatalytic activity was highest in coatings applied to quartz sand, although sterilisation of the recirculating water was not achieved with any of the materials investigated. The advantages of quartz as a TiO 2 photocatalyst support material are likely a result of this material's higher purity and optical transmittance. Potential enhancement through Si doping cannot be ruled out.

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“…TiO 2 supported on stainless steel electrodes has been used previously to study the purely photocatalytic degradation of formic acid and malic acid (5,6). We employed this material to study both photocatalytic and photoelectrocatalytic processes.…”

Section: Stability and Activity Of Aluminium-supported Photoelectrodesmentioning

confidence: 99%

Investigation of novel electrode materials for electrochemically based remediation of high and low-level mixed wastes in the DOE complex. 1997 annual progress report

Anderson¹,

Lewis²

1997

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This work is focused on the preparation of novel electrode materials for the degradation of toxic wastes in the DOE complex. One of the goals of this work is to characterize whether it is possible to use controlled doping of TiO 2 with species such as Nb in order to create new electrode materials that will facilitate the destruction of undesirable organics and inorganics, without light and instead only with an applied potential, in the waste tanks at the DOE sites. In the first part of this project, we have therefore spent an extensive amount of effort characterizing, as a baseline. the chemical and electrochemical behavior of TiO 2 itself, so that we can make robust comparisons to the behavior of the Nb-doped systems in subsequent work on this project. The preparation of these electrode films is being performed by Marc Anderson at Wisconsin. who is preparing a number of different stoichiometries, grain sizes, etc. for investigation of their electrochemical properties by the Lewis group at Caltech. First we report on the progress of the electrode preparation work. and then we describe progress on the electrochemical work.

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Preparation and characterization of TiO2 photocatalysts supported on various rigid supports (glass, quartz and stainless steel). Comparative studies of photocatalytic activity in water purification

Cited by 484 publications

References 25 publications

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

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

Sand Supported Mixed‐Phase TiO₂ Photocatalysts for Water Decontamination Applications

Investigation of novel electrode materials for electrochemically based remediation of high and low-level mixed wastes in the DOE complex. 1997 annual progress report

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Preparation and characterization of TiO2 photocatalysts supported on various rigid supports (glass, quartz and stainless steel). Comparative studies of photocatalytic activity in water purification

Cited by 484 publications

References 25 publications

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

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

Sand Supported Mixed‐Phase TiO2 Photocatalysts for Water Decontamination Applications

Investigation of novel electrode materials for electrochemically based remediation of high and low-level mixed wastes in the DOE complex. 1997 annual progress report

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Sand Supported Mixed‐Phase TiO₂ Photocatalysts for Water Decontamination Applications