Effect of post-treatments on the photocatalytic activity of Sm2Ti2S2O5 for the hydrogen evolution reaction

被引：53

作者：

Zhao, Wen ^{[1
]}

Maeda, Kazuhiko ^{[1
,2
]}

Zhang, Fuxiang ^{[1
]}

Hisatomi, Takashi ^{[1
]}

Domen, Kazunari ^{[1
]}

机构：

[1] Univ Tokyo, Dept Chem Syst Engn, Bunkyo Ku, Tokyo 1138656, Japan

[2] Japan Sci & Technol Agcy JST, Precursory Res Embryon Sci & Technol PRESTO, Kawaguchi, Saitama 3320012, Japan

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2014年 / 16卷 / 24期

基金：

日本科学技术振兴机构; 日本学术振兴会;

关键词：

VISIBLE-LIGHT IRRADIATION; DIFFERENT SEMICONDUCTOR PHOTOCATALYSTS; SHUTTLE REDOX MEDIATOR; Z-SCHEME; OXYSULFIDE SM2TI2S2O5; ELECTRON MEDIATOR; WATER OXIDATION; REDUCTION; SYSTEM; H-2;

D O I：

10.1039/c3cp54668c

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The oxysulphide photocatalyst Sm2Ti2S2O5 was synthesized by sulphurizing an amorphous Sm2Ti2O7 prepared using a polymerized complex method under a H2S flow and was used as a H-2 evolution photocatalyst in the sacrificial H-2 evolution and Z-scheme water splitting reactions. The H-2 evolution activity of Rh-loaded Sm2Ti2S2O5 was improved by annealing with sulphur powder and etching with nitric acid. Characterization using XRD, SEM, DRS and XPS suggested that annealing with sulphur decreased the density of the reduced Ti species in Sm2Ti2S2O5 and etching with nitric acid removed the amorphous phases and excessive sulphur species on the surface. After the two post-treatments, platinized Sm2Ti2S2O5 combined with rutile-type TiO2 and Nal showed activity for Z-scheme water splitting under UV irradiation. Although UV irradiation was necessary owing to the use of TiO2, this work provided the first evidence that an oxysulphide photocatalyst was applicable to Z-scheme water splitting.

引用

页码：12051 / 12056

页数：6

共 19 条

[1] Development of new photocatalytic water splitting into H2 and O2 using two different semiconductor photocatalysts and a shuttle redox mediator IO3 -/I- [J].

Abe, R ;

Sayama, K ;

Sugihara, H .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (33) :16052-16061

[2] Recent progress on photocatalytic and photoelectrochemical water splitting under visible light irradiation [J].

Abe, Ryu .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS, 2010, 11 (04) :179-209

[3] Z-scheme overall water splitting on modified-TaON photocatalysts under visible light (λ<500 nm) [J].

Higashi, Masanobu ;

Abe, Ryu ;

Ishikawa, Akio ;

Takata, Tsuyoshi ;

Ohtani, Bunsho ;

Domen, Kazunari .

CHEMISTRY LETTERS, 2008, 37 (02) :138-139

[4] Novel synthesis and photocatalytic activity of oxysulfide Sm2Ti2S2O5 [J].

Ishikawa, A ;

Yamada, Y ;

Takata, T ;

Kondo, JN ;

Hara, M ;

Kobayashi, H ;

Domen, K .

CHEMISTRY OF MATERIALS, 2003, 15 (23) :4442-4446

[5] Oxysulfide Sm2Ti2S2O5 as a stable photocatalyst for water oxidation and reduction under visible light irradiation (λ ≤ 650 nm) [J].

Ishikawa, A ;

Takata, T ;

Kondo, JN ;

Hara, M ;

Kobayashi, H ;

Domen, K .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2002, 124 (45) :13547-13553

[6] Heterogeneous photocatalyst materials for water splitting [J].

Kudo, Akihiko ;

Miseki, Yugo .

CHEMICAL SOCIETY REVIEWS, 2009, 38 (01) :253-278

[7] Sulfurization-Assisted Cobalt Deposition on Sm2Ti2S2O5 Photocatalyst for Water Oxidation under Visible Light Irradiation [J].

Li, Rengui ;

Chen, Zheng ;

Zhao, Wen ;

Zhang, Fuxiang ;

Maeda, Kazuhiko ;

Huang, Baokun ;

Shen, Shuai ;

Domen, Kazunari ;

Li, Can .

JOURNAL OF PHYSICAL CHEMISTRY C, 2013, 117 (01) :376-382

[8] Z-Scheme Water Splitting Using Two Different Semiconductor Photocatalysts [J].

Maeda, Kazuhiko .

ACS CATALYSIS, 2013, 3 (07) :1486-1503

[9] Photocatalytic Water Splitting: Recent Progress and Future Challenges [J].

Maeda, Kazuhiko ;

Domen, Kazunari .

JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 2010, 1 (18) :2655-2661

[10] Efficient Nonsacrificial Water Splitting through Two-Step Photoexcitation by Visible Light using a Modified Oxynitride as a Hydrogen Evolution Photocatalyst [J].

Maeda, Kazuhiko ;

Higashi, Masanobu ;

Lu, Daling ;

Abe, Ryu ;

Domen, Kazunari .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2010, 132 (16) :5858-5868

← 1 2 →