光催化
基质(水族馆)
量子产额
产量(工程)
催化作用
胶体
动能
辐照度
化学
光化学
材料科学
化学工程
化学物理
物理化学
光学
物理
有机化学
量子力学
复合材料
地质学
工程类
海洋学
荧光
作者
Marco Prozzi,Fabrizio Sordello,Simone Barletta,Marco Zangirolami,Francesco Pellegrino,Alessandra Bianco Prevot,Valter Maurino
标识
DOI:10.1021/acscatal.0c02518
摘要
We demonstrated that controlled periodic illumination (CPI) is unable to increase the quantum yield (or photoefficiency) of the photocatalytic process. Nevertheless, choosing the appropriate experimental conditions and the use of CPI coupled with a simplified kinetic model allowed us to extract the lifetime of the species involved in substrate oxidation. These figures are usually elusive, even though there is a wide collection of hypotheses, guesses, and speculations in the literature. From our analysis, we defined a surface photocatalytic activity index. The latter consists of the ratio between the surface-defined kinetic constant for substrate oxidation and surface recombination and is independent of other experimental conditions, such as irradiance and catalyst concentration.
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