Particle size effects of tetrahedron-shaped Ag3PO4 photocatalyst on water-oxidation activity and carrier recombination dynamics

Ryo Miyasato; Masazumi Fujiwara; Haruyuki Sato; Toshihiro Yano; Hideki Hashimoto

doi:10.1016/j.cpletx.2019.100023

Particle size effects of tetrahedron-shaped Ag₃PO₄ photocatalyst on water-oxidation activity and carrier recombination dynamics

Ryo Miyasato, Masazumi Fujiwara, Haruyuki Sato, Toshihiro Yano, Hideki Hashimoto

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

We investigated photocatalytic water-oxidation performance of tetrahedron-shaped silver phosphate (Ag₃PO₄) crystals with various particle sizes. The performance was clearly influenced by the particle size. The maximum activity was found for the particle with a tetrahedron edge with 1.5 μm length, which showed the highest rate of oxygen evolution. A series of analysis against time-resolved diffuse reflection spectra of the powder samples reveals that not only carrier recombination dynamic but also photoexcited carrier density can play important roles in the water oxidation. Our finding should contribute to give one of the basic ideas when designing semiconductor photocatalysts for water splitting.

Original language	English
Article number	100023
Journal	Chemical Physics Letters: X
Volume	2
DOIs	https://doi.org/10.1016/j.cpletx.2019.100023
Publication status	Published - Apr 2019
Externally published	Yes

Keywords

Carrier dynamics
Global analysis
Photocatalytic water oxidation
Silver phosphate

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.cpletx.2019.100023

Cite this

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title = "Particle size effects of tetrahedron-shaped Ag3PO4 photocatalyst on water-oxidation activity and carrier recombination dynamics",

abstract = "We investigated photocatalytic water-oxidation performance of tetrahedron-shaped silver phosphate (Ag3PO4) crystals with various particle sizes. The performance was clearly influenced by the particle size. The maximum activity was found for the particle with a tetrahedron edge with 1.5 μm length, which showed the highest rate of oxygen evolution. A series of analysis against time-resolved diffuse reflection spectra of the powder samples reveals that not only carrier recombination dynamic but also photoexcited carrier density can play important roles in the water oxidation. Our finding should contribute to give one of the basic ideas when designing semiconductor photocatalysts for water splitting.",

keywords = "Carrier dynamics, Global analysis, Photocatalytic water oxidation, Silver phosphate",

author = "Ryo Miyasato and Masazumi Fujiwara and Haruyuki Sato and Toshihiro Yano and Hideki Hashimoto",

note = "Funding Information: The authors would like to thank Prof. Ryu Abe at Kyoto University for kind instruction and guidance to perform the experiments of water oxidation. HH thanks JSPS KAKENHI , Grant-in-Aids for Basic Research (B) (No. 16H04181 ) and Scientific Research on Innovative Areas “Innovations for Light-Energy Conversion (I 4 LEC)” (No. 17H06433 & No. 17H0637 ) for financial support. Publisher Copyright: {\textcopyright} 2019 The Authors",

year = "2019",

month = apr,

doi = "10.1016/j.cpletx.2019.100023",

language = "English",

volume = "2",

journal = "Chemical Physics Letters: X",

issn = "2590-1419",

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AU - Miyasato, Ryo

AU - Fujiwara, Masazumi

AU - Sato, Haruyuki

AU - Yano, Toshihiro

AU - Hashimoto, Hideki

N1 - Funding Information: The authors would like to thank Prof. Ryu Abe at Kyoto University for kind instruction and guidance to perform the experiments of water oxidation. HH thanks JSPS KAKENHI , Grant-in-Aids for Basic Research (B) (No. 16H04181 ) and Scientific Research on Innovative Areas “Innovations for Light-Energy Conversion (I 4 LEC)” (No. 17H06433 & No. 17H0637 ) for financial support. Publisher Copyright: © 2019 The Authors

PY - 2019/4

Y1 - 2019/4

N2 - We investigated photocatalytic water-oxidation performance of tetrahedron-shaped silver phosphate (Ag3PO4) crystals with various particle sizes. The performance was clearly influenced by the particle size. The maximum activity was found for the particle with a tetrahedron edge with 1.5 μm length, which showed the highest rate of oxygen evolution. A series of analysis against time-resolved diffuse reflection spectra of the powder samples reveals that not only carrier recombination dynamic but also photoexcited carrier density can play important roles in the water oxidation. Our finding should contribute to give one of the basic ideas when designing semiconductor photocatalysts for water splitting.

AB - We investigated photocatalytic water-oxidation performance of tetrahedron-shaped silver phosphate (Ag3PO4) crystals with various particle sizes. The performance was clearly influenced by the particle size. The maximum activity was found for the particle with a tetrahedron edge with 1.5 μm length, which showed the highest rate of oxygen evolution. A series of analysis against time-resolved diffuse reflection spectra of the powder samples reveals that not only carrier recombination dynamic but also photoexcited carrier density can play important roles in the water oxidation. Our finding should contribute to give one of the basic ideas when designing semiconductor photocatalysts for water splitting.

KW - Carrier dynamics

KW - Global analysis

KW - Photocatalytic water oxidation

KW - Silver phosphate

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