Photostimulated reactions at the surface of wide band-gap metal oxides (ZrO2 and TiO2): interdependence of rates of reactions on pressure-concentration and on light intensity

Article Abstract:

Research was conducted to examine the photostimulated reactions at the surface of wide band-gap metal oxides such as TiO2 and ZrO2. Specifically, the photostimulated adsorption of oxygen on ZrO2 upon illumination with UV light and its postphotostimulated photoadsorption on irradiation with visible light were investigated. Results indicate that the proposed photoadsorption mechanism can be expanded to photocatalyzed oxidative reactions of phenol in irradiated aqueous TiO2 dispersions.

Titanium dioxide, Chemical reaction, Rate of, Chemical kinetics, Adsorption, Catalysis

---

Effect of surface photoreactions on the photocoloration of a wide band gap metal oxide: Probing whether surface reactions are photocatalytic

Article Abstract:

The study was aimed at examining the effect(s) of surface photochemical reactions involving H(sub 2), O(sub 2), NH(sub 3), and CO(sub 2) on the photocoloration of ZrO(sub 2) in particular, and metal oxides in general. The effect of a nonphotocatalytic reaction occurring on the surface of an irradiated wide band gap metal oxide is seen as the influence of photosimulated adsorption on the photocoloration of the metal oxide specimen.

Science & research, Optical properties, Photochemical research, Surface chemistry

---

Mechanistic studies of the formation of different states of oxygen on irradiated ZrO2 and the photocatalytic nature of photoprocesses from determination of turnover numbers

Article Abstract:

The results of a mechanistic study into the formation of various states of oxygen produced over irradiated zirconia (ZrO2) under various conditions. The photooxiodation of hydrogen in the presence of molecular oxygen over irradiated powdered ZrO2 as a model reaction is examined.

Russia, Analysis, Spectra, Photochemistry, Chemical properties

Similar abstracts:

• Abstracts: Enhanced reactivity at metal-oxide interface: water interaction with MgO ultrathin films. Floating films of a nonamphiphilic porphyrazine at the air-water interface and LS multilayer construction and optical characterization
• Abstracts: SFG study of the ethanol in an acidic medium-Pt(110) interface: Effects of the alcohol concentration. Lipid-ethanol interaction studied by NMR on bicelles
• Abstracts: A comparative study of the surface structure, acidity, and catalytic performance of tungstated zirconia prepared from crystalline zirconia or amorphous zirconium oxyhydroxide
• Abstracts: Alkylphosphonate modified aluminum oxide surfaces. Vanadium oxides on aluminum oxide supports. 2. Structure, vibrational properties, and reducibility of V2O5 clusters on alpha-Al2O3(0001)
• Abstracts: Controllable synthesis and optical properties of novel ZnO cone arrays via vapor transport at low temperature

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