Issue 6, 2023

Femtosecond transient absorption spectroscopy investigation into the electron transfer mechanism in photocatalysis

Abstract

Femtosecond transient absorption spectroscopy (fs-TAS) is a powerful technique for monitoring the electron transfer kinetics in photocatalysis. Several important works have successfully elucidated the electron transfer mechanism in heterojunction photocatalysts (HPs) using fs-TAS measurements, and thus a timely summary of recent advances is essential. This feature article starts with a thorough interpretation of the operating principle of fs-TAS equipment, and the fundamentals of the fs-TAS spectra. Subsequently, the applications of fs-TAS in analyzing the dynamics of photogenerated carriers in semiconductor/metal HPs, semiconductor/carbon HPs, semiconductor/semiconductor HPs, and multicomponent HPs are discussed in sequence. Finally, the significance of fs-TAS in revealing the ultrafast interfacial electron transfer process in HPs is summarized, and further research on the applications of fs-TAS in photocatalysis is proposed. This feature article will provide deep insight into the mechanism of the enhanced photocatalytic performance of HPs from the perspective of electron transfer kinetics.

Graphical abstract: Femtosecond transient absorption spectroscopy investigation into the electron transfer mechanism in photocatalysis

Article information

Article type
Feature Article
Submitted
21 nov 2022
Accepted
21 dec 2022
First published
21 dec 2022

Chem. Commun., 2023,59, 688-699

Femtosecond transient absorption spectroscopy investigation into the electron transfer mechanism in photocatalysis

J. Zhang, B. Zhu, L. Zhang and J. Yu, Chem. Commun., 2023, 59, 688 DOI: 10.1039/D2CC06300J

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