Spectral dependencies of the quantum yield of photochemical processes on the surface of nano/micro-particulates of wide-band-gap metal oxides. IV. Theoretical modeling of the activity and selectivity of semiconductor photocatalysts with inclusion of a subsurface electric field in the space charge region

Article Abstract:

The continuity equation revisited, including a subsurface electric field (E) in the space charge region of the semiconductor photocatalyst is used to assess the effect that the electric field has on the activity and selectivity of the photocatalyst. A mismatch between the experimental spectral dependence of the quantum yield and the corresponding absorption band may be an indicator of the existence of a space charge region in the solid photocatalyst.

Usage, Quantum theory, Quantum mechanics, Electric fields, Photochemistry

---

Dogmas and misconceptions in heterogeneous photocatalysis: Some enlightened reflections

Article Abstract:

The reexamination of the Langmuir-Hinshelwood (LH) kinetic model along with several other dogmas that continue to propagate in the heterogeneous photocatalytic landscape is presented. The priori assumed validity of the LH kinetic model in heterogenous photocataylsis and the recombination of photogenerated free charge carriers on the solid photocataylsis by the band-to-band recombination pathway is reexamined.

Chemical reaction, Rate of, Chemical kinetics, Dogmatism

---

Spectral dependence and wavelength selectivity in heterogeneous photocatalysis. I. Experimental evidence from the photocatalyzed transformation of phenols

Article Abstract:

The photocatalyzed transformation of phenol and 4-chloropphenol in air-equilibrated TiO(sub 2) dispersions are used to examine the spectral behavior of the quantum yields phi of loss of theses two substrates at various wavelengths.

Cyclic crudes and intermediates, Cyclic Crude and Intermediate Manufacturing, Phenol, Optical properties, Titanium dioxide, Phenol (Compound), Chlorophenols

Similar abstracts:

• Abstracts: Effect of the Si/AI Ratio on the Local Structure of V oxide/ZSM-5 Catalysts Prepared by solid-state reaction and their photocatalytic reactivity for the decomposition of NO in the absence and presence of propane. part 2
• Abstracts: Luminescence properties of the mixed J-aggregate of oxacyanine dye and thiacyanine dye: Formation of a persistence-type aggregate
• Abstracts: Photochemical behavior and formation of surface relief grating on self-assembled polyion/dye composite film. Ultrafast electron transfer dynamics from molecular adsorbates to semiconductor nanocrystalline thin films
• Abstracts: Determination of the dieletric constant of nanoparticles. 1. Dielectric measurements of buckminsterfullerene solutions
• Abstracts: Lattice defects and oxygen storage capacity of nanocrystalline ceria and ceria-zirconia. Nanoscale heterogeneities and oxygen storage capacity of Ce0.5Zr0.5O2

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