Direct detection of OH radicals diffused to the gas phase from the UV-irradiated photocatalytic Ti[O.sub.2] surfaces by means of laser-induced fluorescence spectroscopy

Article Abstract:

The laser-induced fluorescence (LIF) technique is used in the in situ detection of OH radicals diffused in the gas phase from the photocatalytic titanium dioxide (Ti[O.sub.2]) surfaces. The appearance of OD-LIF intensities after the exposure of [D.sub.2]O vapors over Ti[O.sub.2] powders and the decrease of the time-resolved signals of OH-LIF intensities with increased calcined temperatures of Ti[O.sub.2] powders have suggested that the exchangeable water at the Ti[O.sub.2] surface is the origin of the diffused OH radical.

Science & research, Spectra, Titanium, Properties, Laser photochemistry, Chemical properties

---

Factors governing the initial process of TiO2 photocatalysis studied by means of in-situ electron spin resonance measurements

Article Abstract:

A study was conducted to analyze factors affecting the initial process of TiO2 photocatalysis using in-situ electron spin resonance measurements. The Rigaku GeigerFlex RAD was utilized to measure the X-ray diffraction of the Pt/TiO2 powders. The JEOL JES RE-2X spectrometer was then used to determine the in-situ electron spin resonance spectra. Results indicated that the properties of TiO2 powders significantly affected the initial oxidation pathways.

Usage, Oxidation-reduction reaction, Oxidation-reduction reactions, Electron paramagnetic resonance

---

Similar abstracts:

• Abstracts: Separation of the ultraviolet-visible spectra of the redox states of conducting polymers by simultaneous use of electron-spin resonance and ultraviolet-visible spectroscopy
• Abstracts: Metal particle size and structure of the metal-support interface of carbon-supported platinum catalysts as determined with EXAFS spectroscopy
• Abstracts: Calculations on the electronic excited states of ureas and oligoureas. Significant conformational changes associated with molecular transport in a crystalline solid
• Abstracts: Ion association and hydration in aqueous solutions of copper(II) sulfate from 5 to 65 degree Celsius by dielectric spectroscopy
• Abstracts: Comment on "On the accuracy of force fields for predicting the physical properties of dimethylnitramine". Molecular dynamics simulations of the melting mechanisms of perfect and imperfect crystals of dimethylnitramine

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.