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Plate-like Sm2Ti2S2O5 Particles Prepared by a Flux-Assisted One-Step Synthesis for the Evolution of O-2 from Aqueous Solutions by Both Photocatalytic and Photoelectrochemical Reactions
Ma, Guijun; Kuang, Yongbo; Murthy, Dharmapura H. K.; Hisatomi, Takashi; Seo, Jeongsuk; Chen, Shanshan; Matsuzaki, Hiroyuki; Suzuki, Yohichi; Katayama, Masao; Minegishi, Tsutomu; Seki, Kazuhiko; Furube, Akihiro; Domen, Kazunari
2018
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
Volume122Issue:25Pages:13492-13499
AbstractSm2Ti2S2O5 (STSO) is a visible-light-responsive oxysulfide semiconductor photocatalyst with applications to water splitting. In this work, plate-like STSO particles were synthesized through a flux-assisted one-step method at various temperatures. The activities of these materials during photocatalytic and photoelectrochemical O-2 evolution from aqueous solutions were investigated. Single-phase STSO with a single crystal habit was produced at 923 K, which is approximately 200 K lower than the temperatures required for previously reported methods, such as solid-state reactions and thermal sulfurization under a H2S flow. The STSO sample synthesized at the optimal temperature exhibited an AQE of 1.3 +/- 0.2% at 420 nm during photocatalytic sacrificial O-2 evolution. This efficiency is twice the values reported for specimens prepared using conventional methods. An STSO/Ti/Sn electrode fabricated by the particle transfer method generated a photoanodic current and evolved O-2 by water oxidation with a Faradaic efficiency of approximately 70 +/- 7%. The synthesis temperature yielding the highest activity was lower for photocatalytic O-2 evolution than photoelectrochemical O-2 evolution. This work demonstrates the applicability for of the flux method to the synthesis of well-crystallized oxysulfides having various particle sizes and intended for different uses.
KeywordVisible-light Irradiation Water Oxidation Oxysulfide Sm2ti2s2o5 Carrier Dynamics Sunlight-driven Tio2 Reduction Hydrogen Ln(2)Ti(2)s(2)o(5) Electrodes
Subject AreaChemistry
Language英语
Document Type期刊论文
Identifierhttp://ir.nimte.ac.cn/handle/174433/17374
Collection2018专题
Recommended Citation
GB/T 7714
Ma, Guijun,Kuang, Yongbo,Murthy, Dharmapura H. K.,et al. Plate-like Sm2Ti2S2O5 Particles Prepared by a Flux-Assisted One-Step Synthesis for the Evolution of O-2 from Aqueous Solutions by Both Photocatalytic and Photoelectrochemical Reactions[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2018,122(25):13492-13499.
APA Ma, Guijun.,Kuang, Yongbo.,Murthy, Dharmapura H. K..,Hisatomi, Takashi.,Seo, Jeongsuk.,...&Domen, Kazunari.(2018).Plate-like Sm2Ti2S2O5 Particles Prepared by a Flux-Assisted One-Step Synthesis for the Evolution of O-2 from Aqueous Solutions by Both Photocatalytic and Photoelectrochemical Reactions.JOURNAL OF PHYSICAL CHEMISTRY C,122(25),13492-13499.
MLA Ma, Guijun,et al."Plate-like Sm2Ti2S2O5 Particles Prepared by a Flux-Assisted One-Step Synthesis for the Evolution of O-2 from Aqueous Solutions by Both Photocatalytic and Photoelectrochemical Reactions".JOURNAL OF PHYSICAL CHEMISTRY C 122.25(2018):13492-13499.
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