Enhancement of the photocatalytic activity of various TiO2 materials by platinisation

Hufschmidt, Dirk; Bahnemann, Detlef W.; Testa, Juan J.; Emilio, Carina A.; Litter, Marta I.

doi:10.1016/s1010-6030(02)00048-5

Cited by 244 publications

(159 citation statements)

References 23 publications

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“…The effect of the doping agent in the degradation efficiency is not evident. Positive effect of additives in the decomposition of different organic compounds has been published [2][3][4][5][6][7][8][9], but opposite results have been also reported [1,7,9]. This miscellaneous behaviour can be explained by the difference in the morphology, crystal structure, specific surface area and the surface density of the OH groups of the studied TiO 2 catalysts, due to the various preparation methods applied in their synthesis [22].…”

Section: Introductionmentioning

confidence: 94%

“…photosensitization) resulting in enhanced photocatalytic activity is one of the most important aspects of heterogeneous photocatalysis. Deposition of different metals (like Pt, Pd, Au, Ag, Fe, Nb and Cu) [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] or oxides such as WO 3 [17] onto titanium dioxide has been widely used as a technique to extend the light absorption to the visible region.…”

Section: Introductionmentioning

confidence: 99%

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Photocatalytic activity of silver-modified titanium dioxide at solid–liquid and solid–gas interfaces

Kőrösi

Papp

Ménesi

et al. 2008

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Silver-modified titania samples (Ag-TiO 2 ) with varying silver content (0.1-1.0 wt%) were prepared. Silver-modification of titanium dioxide was examined by TEM, XRD, XPS and DR-UV-vis spectroscopy. Ag or AgO x particles on TiO 2 surface could not be observed by XRD and TEM investigation, however the color of the Ag-TiO 2 samples varied between light rose and purple-brown. XPS measurements revealed that silver exists mainly in oxide form. The photocatalytic activity of pure and Ag-TiO 2 samples were compared both in solid-liquid and in solid-gas interfaces. In the liquid phase the 2,2 -thiodiethanol was used as test molecule. Ethanol photodegradation was examined in gas phase at dry initial condition. It was shown that the rate of photooxidation of organic compounds significantly enhanced by silver-modification of titania.

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Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Photocatalytic activity of silver-modified titanium dioxide at solid–liquid and solid–gas interfaces

Kőrösi

Papp

Ménesi

et al. 2008

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…The enhancement in decomposition rate of organic pollutant in the presence of metalized metal oxides may be mainly attributed to the formation of a Schottky barrier between the metal and the semiconductor 36 . So, when the platinum particles are deposited onto the surface of TiO 2 , a Schottky barrier formed at the interface of TiO 2 and Pt metal particles, resulting in an efficient channeling of excited conduction band electrons from the bulk of TiO 2 to the newly formed interface.…”

Section: Photocatalytic Degradation Of Rhodamine Bmentioning

confidence: 99%

Enhanced Photocatalytic Activity of Pure Anatase Tio2 and Pt-Tio2 Nanoparticles Synthesized by Green Microwave Assisted Route

Filippo

Carlucci²,

Capodilupo³

et al. 2015

Mat. Res.

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High-yield, rapid and facile synthesis of elongated pure anatase titania nanoparticles has been achieved through a nonaqueous microwave-based approach. The residual organics onto nanoparticles surfaces were completely removed through a new treatment under ozone flow, at room temperature in air. Such an ozone cleaning method revealed an effective inexpensive dry process of removing organic contaminants from nanoparticles surfaces. The TiO 2 elongated nanoparticles having a length of 13.8 ± 5.5 nm and a diameter of 9.0 ±1.2 nm were characterized by powder X-Ray diffraction, transmission electron microscopy, selected area diffraction, BET surface area analyzer and FT-IR spectroscopy. Photocatalytic evaluation demonstrated that the as-synthesized ozone-cleaned TiO 2 nanoparticles and TiO 2 nanoparticles loaded with platinum possess excellent Rhodamine B performance with respect to both commercial spherical nanotitania P25 and P25 loaded with platinum. This could be attributed to the anatase phase purity, small size, large specific surface area and clean surfaces of the prepared nanoparticles.

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“…Most of the deposited metals that have been previously studied belong to group VIII. A considerable increase of the photocatalytic activity has been reported in particular with platinum deposited on TiO 2 particles [7,8]. The photocatalytic activity with silver deposit was much less enhanced than that with Pt deposit, or even detrimental.…”

Section: Introductionmentioning

confidence: 99%

A mechanism for enhanced photocatalytic activity of silver-loaded titanium dioxide

et al. 2004

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Enhancement of the photocatalytic activity of various TiO2 materials by platinisation

Cited by 244 publications

References 23 publications

Photocatalytic activity of silver-modified titanium dioxide at solid–liquid and solid–gas interfaces

Photocatalytic activity of silver-modified titanium dioxide at solid–liquid and solid–gas interfaces

Enhanced Photocatalytic Activity of Pure Anatase Tio2 and Pt-Tio2 Nanoparticles Synthesized by Green Microwave Assisted Route

A mechanism for enhanced photocatalytic activity of silver-loaded titanium dioxide

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