&lt;title&gt;Photocatalytic activity of porous anatase layers monitored with the linear optical response&lt;/title&gt;

Gayvoronsky, V. Ya.; Galas, A.; Manko, Dmitry Y.; Lysenko, Sergiy; Petrik, I.; Smirnova, N. P.; Eremenko, A. M.; Dittrich, Thomas; Loginenko, O.; Koch, F.

doi:10.1117/12.545843

Cited by 3 publications

(2 citation statements)

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“…1b). Transmission/reflection spectroscopy, measurements of angular resolved light scattering and ellipsometry [2] gave possibility to calculate absorption spectra, optical band-gaps for indirect (E G ~ 3.4 eV) and direct (~ 3.6 eV) transitions, thickness 240 nm for TiO 2 (300) and 360 nm for TiO 2 (1000) and total integrated light scattering coefficients (less than 0.5 % at 633 nm) of TiO 2 nanocomposites. We have estimated porosity of the nanocomposites films assuming them as a combination of anatase and voids and applying Bruggemann effective media approximation [3].…”

Section: Resultsmentioning

confidence: 99%

“…We also studied the photocatalytic activity of the TiO 2 films with different complexing agents. The photocatalytic experiment [2] was carried out in a quartz reactor containing the TiO 2 nanocomposite film with model organic dye pollutant Rhodamine 6G (R6G) water solution. The volume of the solution and the concentration of the R6G were 20 ml and 2.5⋅10…”

Section: Resultsmentioning

confidence: 99%

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Giant nonlinear optical response application for nanoporous titanium dioxide photocatalytic activity monitoring

Gayvoronsky

Timoshenko

Brodyn

et al. 2005

phys. stat. sol. (c)

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Giant nonlinear optical response has been observed for nanoparticle TiO 2 (anatase modification) layers within sub-gap photon energy excitation in picosecond range. The obtained effective cubic optical nonlinearity value χ-5 esu is six orders of magnitude higher than the bulk response in transparency range. The effect can be explained with resonant excitation of oxygen vacancies and related defect states , which also act as photocatalytic active centers at the nanoparticle surface. The magnitude of the nonlinear optical response correlates with the photocatalytic activity and depends on the samples preparation conditions.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%