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Facet Effects of Ag 3 PO 4 on Charge‐Carrier Dynamics: Trade‐Off Between Photocatalytic Activity and Charge‐Carrier Lifetime
Author(s) -
Kim Sooyeon,
Wang Yue,
Zhu Mingshan,
Fujitsuka Mamoru,
Majima Tetsuro
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201803505
Subject(s) - photocatalysis , charge carrier , photoluminescence , femtosecond , materials science , facet (psychology) , diffuse reflectance infrared fourier transform , spectroscopy , charge (physics) , quantum yield , surface charge , chemical physics , chemistry , catalysis , optoelectronics , optics , physics , laser , psychology , social psychology , biochemistry , personality , quantum mechanics , fluorescence , big five personality traits
Silver phosphate (Ag 3 PO 4 ) is a promising visible‐light‐driven photocatalyst with a strong oxidation power and exceptionally high apparent quantum yield of O 2 evolution. Although engineering Ag 3 PO 4 facets is widely known to enhance its photocatalytic activity, most studies have explained its facet effect by calculating surface energies. Herein, the charge carrier dynamics in three kinds of Ag 3 PO 4 crystals (mixed facets, cubic, and tetrahedral structures) were first investigated using single‐particle photoluminescence microscopy and femtosecond time‐resolved diffuse reflectance spectroscopy. As a result, we clarified that the disagreement between the photocatalytic activities (dye degradation and O 2 evolution) of different Ag 3 PO 4 facets are the consequence of trade‐off between catalytic activity and lifetime of photogenerated charge carriers in addition to surface energy.