Glossary of terms used in photocatalysis and radiation catalysis (IUPAC Recommendations 2011)

Abstract

This glossary of terms covers phenomena considered under the very wide terms photocatalysis and radiation catalysis. A clear distinction is made between phenomena related to either photochemistry and photocatalysis or radiation chemistry and radiation catalysis. The term "radiation" is used here as embracing electromagnetic radiation of all wavelengths, but in general excluding fast-moving particles. Consistent definitions are given of terms in the areas mentioned above, as well as definitions of the most important parameters used for the quantitative description of the phenomena. Terms related to the up-scaling of photocatalytic processes for industrial applications have been included. This Glossary should be used together with the Glossary of terms used in photochemistry, 3 rd edition,

Engineering titania nanostructure to tune and improve its photocatalytic activity

“…After normalization, long rods were found to be the most active, with an intrinsic hydrogen production rate that was roughly 8 times that of short rods. The quantum yields for hydrogen production, i.e., the fraction of photons that are used in the chemical reaction to produce hydrogen, were measured in a separate experiment using monochromated light at 365 nm also following IUPAC recommendations (33). In the case of ethanol, quantum yields as high as 65% were calculated, which are among the highest reported for platinized titania materials (36).…”

Solar Water Splitting Using Semiconductor Photocatalyst Powders

“…This is indeed beneficial for suspension systems compared with film configurations. It is very difficult to measure quantitatively the extent of the scattering and reflection in experiments, so the photocatalytic efficiency is generally associated with the incident photons (which can be separately measured) to the reactor or measured actinometrically [30].…”

Fundamental Mechanistic Studies of the Photo-Fenton Reaction for the Degradation of Organic Pollutants

“…Light of wavelengths in the range of 250-400 nm, corresponding to the ultraviolet (UV) region of the spectrum, is most commonly used in photochemical degradation processes (Braslavsky et al, 2011). Since ultraviolet light is a natural component of solar radiation, the sun provides a low-cost, environmentally friendly, renewable source of ultraviolet photons in photochemical processes.…”