Sonochemical degradation rates of volatile solutes

Article Abstract:

The degradation rates of chlorinated ethanes, ethenes and methanes in aqueous solutions sonicated at frequencies of 205, 358, 618 and 1078 kHz were investigated. Results showed that the degradation rates are consistent with total decomposition of the solute contained in collapsing bubbles and are about 15% ultrasound power efficiency for transient cavitation. These findings indicate that the degradation rates are proportional to the density of the bubbles excited per unit time.

Methane, Chemical reactions, Ethanes, Ethane, Olefins, Alkenes

---

Infrared spectra of photoinduced species on hydroxylated titania surfaces

Article Abstract:

Transient and persistent diffuse reflectance infrared signals from surface intermediates generated by band gap irradiation of polycrystalline, hydroxylated TiO2 under controlled atmospheres is detected. The upward baseline shift following irradiation in vacuo is interpreted as evidence of the presence of mobile charge carriers that, by enhancing the refractive index, adecrease the infrared reflectivity of TiO2 surfaces.

Science & research, Usage, Electric properties, Chemistry, Physical and theoretical, Physical chemistry, Infrared spectroscopy, Titanium compounds, Hydroxylation

---

Oxidative power of nitrogen-doped TiO2 photocatalyst under visible illuminatio

Article Abstract:

Nitrogen doping is known to extend the absorptivity of TiO2 photocatalysts into the visible. The study presented reports that N-doped TiO2 materials fail to catalyze the oxidation of HCOO(super -) into CO(sub 2)(super .-), or of NH(sub 3-)OH(super +) into NO(sub 3)(super -), under visible illumination.

Nitrogenous Fertilizer Manufacturing, Nitrogenous fertilizers, Ammonia, Methods, Oxidation-reduction reaction, Oxidation-reduction reactions, Titanium dioxide

Similar abstracts:

• Abstracts: Sonochemical preparation and characterization of europium oxide doped in and coated on ZrO2 and yttrium-stabilized zirconium (YSZ)
• Abstracts: Highly efficient formation of visible light tunable TiO (sub 2-x) N (sub x) photocatalysts and their transformation at the nanoscale
• Abstracts: Effects of induction interactions on the orientational order of solutes in liquid crystals. Molecular wire electronic state crossing driven by applied voltage
• Abstracts: An in situ study using anomalous wide angle X-ray scattering and X-ray absorption spectroscopy of the catalytic system ZnAI2O4 supported on alumina
• Abstracts: Photocatalytic dehydrogenation of 2-propanol on TiO2(110). Vanishing of current-doubling effect in photooxidation of 2-propanol on TiO2 in solutions containing Fe(III) ions

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