Titanium Dioxide Pigments: Correlation between Photochemical Reactivity and Chalking.

Jacobsen, A. E.

doi:10.1021/ie50471a018

Cited by 54 publications

(14 citation statements)

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“…Although first scientific reports of photoinduced effects of titanium dioxide on chemical reactions were available already more than ninety years ago [1][2][3][4][5][6][7][8], it was first in the 1970s that potential practical applications of TiO 2 photoelectrochemistry and photocatalysis have been fully recognized. This was particularly due to the pioneering work of Fujishima and Honda on solar-driven water splitting into hydrogen and oxygen using a TiO 2 photoanode [9][10][11], which promised utilization of TiO 2 -based materials for solar energy conversion and storage [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

(Photo)electrochemical Methods for the Determination of the Band Edge Positions of TiO₂‐Based Nanomaterials

Beránek

2011

Advances in Physical Chemistry

342

183

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TiO 2 -based nanomaterials play currently a major role in the development of novel photochemical systems and devices. One of the key parameters determining the photoactivity of TiO 2 -based materials is the position of the band edges. Although its knowledge is an important prerequisite for understanding and optimizing the performance of photochemical systems, it has been often rather neglected in recent research, particularly in the field of heterogeneous photocatalysis. This paper provides a concise account of main methods for the determination of the position of the band edges, particularly those suitable for measurements on nanostructured materials. In the first part, a survey of key photophysical and photochemical concepts necessary for understanding the energetics at the semiconductor/solution interface is provided. This is followed by a detailed discussion of several electrochemical, photoelectrochemical, and spectroelectrochemical methods that can be applied for the determination of band edge positions in compact and nanocrystalline thin films, as well as in nanocrystalline powders.

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Section: Introductionmentioning

confidence: 99%

(Photo)electrochemical Methods for the Determination of the Band Edge Positions of TiO₂‐Based Nanomaterials

Beránek

2011

Advances in Physical Chemistry

342

183

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“…Exposure of the paste to UV radiation photoreduced the TiO 2 such that the color of the paste changed from white to blue [12]. The CIE L*a*b* color difference (DE*) before and after 1 h exposure to UV radiation was measured using an NF 333, Nippon Denshoku Industries Co., Ltd., Japan digital spectrophotometer.…”

Section: Photocatalytic Activity Measurementmentioning

confidence: 99%

Control of the photocatalytic activity of TiO2 nanoparticles by silica coating with polydiethoxysiloxane

et al. 2008

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“…The ability of titanium dioxide (titania, TiO 2 ) to act as a photocatalyst has been known for 90 years (Renz 1921), and its role in the "chalking" of paint (formation of powder on the surface) is well known (Jacobsen 1949). Interest in the application of the photocatalytic properties of TiO 2 was revived when the photoelectrolysis of water was reported by Fujishima and Honda (1972), and this activity was soon exploited both for the ability to catalyse the oxidation of pollutants (Carey et al 1976;Frank and Bard 1977) and the ability to kill microorganisms (Matusunga 1985;Matsunaga et al 1985).…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic disinfection using titanium dioxide: spectrum and mechanism of antimicrobial activity

Foster

Ditta

Varghese

et al. 2011

Appl Microbiol Biotechnol

975

669

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The photocatalytic properties of titanium dioxide are well known and have many applications including the removal of organic contaminants and production of self-cleaning glass. There is an increasing interest in the application of the photocatalytic properties of TiO(2) for disinfection of surfaces, air and water. Reviews of the applications of photocatalysis in disinfection (Gamage and Zhang 2010; Chong et al., Wat Res 44(10):2997-3027, 2010) and of modelling of TiO(2) action have recently been published (Dalrymple et al. , Appl Catal B 98(1-2):27-38, 2010). In this review, we give an overview of the effects of photoactivated TiO(2) on microorganisms. The activity has been shown to be capable of killing a wide range of Gram-negative and Gram-positive bacteria, filamentous and unicellular fungi, algae, protozoa, mammalian viruses and bacteriophage. Resting stages, particularly bacterial endospores, fungal spores and protozoan cysts, are generally more resistant than the vegetative forms, possibly due to the increased cell wall thickness. The killing mechanism involves degradation of the cell wall and cytoplasmic membrane due to the production of reactive oxygen species such as hydroxyl radicals and hydrogen peroxide. This initially leads to leakage of cellular contents then cell lysis and may be followed by complete mineralisation of the organism. Killing is most efficient when there is close contact between the organisms and the TiO(2) catalyst. The killing activity is enhanced by the presence of other antimicrobial agents such as Cu and Ag.

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Titanium Dioxide Pigments: Correlation between Photochemical Reactivity and Chalking.

Cited by 54 publications

References 1 publication

(Photo)electrochemical Methods for the Determination of the Band Edge Positions of TiO₂‐Based Nanomaterials

(Photo)electrochemical Methods for the Determination of the Band Edge Positions of TiO₂‐Based Nanomaterials

Control of the photocatalytic activity of TiO2 nanoparticles by silica coating with polydiethoxysiloxane

Photocatalytic disinfection using titanium dioxide: spectrum and mechanism of antimicrobial activity

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Titanium Dioxide Pigments: Correlation between Photochemical Reactivity and Chalking.

Cited by 54 publications

References 1 publication

(Photo)electrochemical Methods for the Determination of the Band Edge Positions of TiO2‐Based Nanomaterials

(Photo)electrochemical Methods for the Determination of the Band Edge Positions of TiO2‐Based Nanomaterials

Control of the photocatalytic activity of TiO2 nanoparticles by silica coating with polydiethoxysiloxane

Photocatalytic disinfection using titanium dioxide: spectrum and mechanism of antimicrobial activity

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Product

Resources

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(Photo)electrochemical Methods for the Determination of the Band Edge Positions of TiO₂‐Based Nanomaterials

(Photo)electrochemical Methods for the Determination of the Band Edge Positions of TiO₂‐Based Nanomaterials