Synthesis of Crystallized Mesoporous Tantalum Oxide and Its Photocatalytic Activity for Overall Water Splitting under Ultraviolet Light Irradiation

被引：175

作者：

Noda, Yu ^{[2
]}

Lee, Byongjin ^{[2
]}

Domen, Kazunari ^{[2
]}

Kondo, Junko N. ^{[1
]}

机构：

[1] Tokyo Inst Technol, Midori Ku, Chem Resources Lab, Yokohama, Kanagawa 2268503, Japan

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

来源：

CHEMISTRY OF MATERIALS | 2008年 / 20卷 / 16期

关键词：

D O I：

10.1021/cm703202n

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 well-ordered two-dimensional hexagonal (2D-hex) structure of mesoporous Ta2O5 was maintained after crystallization with the aid of SiO2 reinforcement, which was removed after crystallization. The photocatalytic activity of the mesoporous Ta2O5 for overall water splitting under ultraviolet (UV) irradiation was improved by changing the solid phase structure from amorphous to crystalline by nearly I order of magnitude. The resulting photocatalytic activity of NiOx(3.0 wt %)-loaded crystalline mesoporous Ta2O5 for water decomposition (3360 mu mol.h(-1) of H-2 and 1630 mu mol.h(-1) of O-2 evolution at the initial 1 h) was found to show one of the highest activities among so far reported photocatalysts under similar conditions. The high activity is attributable to the efficient transfer of the excited electrons and holes from inside to the surface of the catalyst through thin-walled crystalline phase.

引用

页码：5361 / 5367

页数：7

共 48 条

[1] LIQUID-CRYSTALLINE PHASES AS TEMPLATES FOR THE SYNTHESIS OF MESOPOROUS SILICA [J].

ATTARD, GS ;

GLYDE, JC ;

GOLTNER, CG .

NATURE, 1995, 378 (6555) :366-368

[2] Ordered porous materials for emerging applications [J].

Davis, ME .

NATURE, 2002, 417 (6891) :813-821

[3] PHOTOCATALYTIC DECOMPOSITION OF WATER INTO H-2 AND O-2 OVER NIO-SRTIO3 POWDER .1. STRUCTURE OF THE CATALYST [J].

DOMEN, K ;

KUDO, A ;

ONISHI, T ;

KOSUGI, N ;

KURODA, H .

JOURNAL OF PHYSICAL CHEMISTRY, 1986, 90 (02) :292-295

[4] PHOTOCATALYSTS WITH TUNNEL STRUCTURES FOR DECOMPOSITION OF WATER .1. BATI4O9, A PENTAGONAL PRISM TUNNEL STRUCTURE, AND ITS COMBINATION WITH VARIOUS PROMOTERS [J].

INOUE, Y ;

ASAI, Y ;

SATO, K .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1994, 90 (05) :797-802

[5] PHOTOCATALYTIC ACTIVITY OF SODIUM HEXATITANATE, NA2TI6O13, WITH A TUNNEL STRUCTURE FOR DECOMPOSITION OF WATER [J].

INOUE, Y ;

KUBOKAWA, T ;

SATO, K .

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1990, (19) :1298-1299

[6] Highly efficient water splitting into H2 and O2 over lanthanum-doped NaTaO3 photocatalysts with high crystallinity and surface nanostructure [J].

Kato, H ;

Asakura, K ;

Kudo, A .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (10) :3082-3089

[7] Water splitting into H2 and O2 on alkali tantalate photocatalysts ATaO3 (A = Li, Na, and K) [J].

Kato, H ;

Kudo, A .

JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (19) :4285-4292

[8] Highly efficient decomposition of pure water into H2 and O2 over NaTaO3 photocatalysts [J].

Kato, H ;

Kudo, A .

CATALYSIS LETTERS, 1999, 58 (2-3) :153-155

[9] New tantalate photocatalysts for water decomposition into H2 and O2 [J].

Kato, H ;

Kudo, A .

CHEMICAL PHYSICS LETTERS, 1998, 295 (5-6) :487-492

[10] Crystallization of an ordered mesoporous Nb-Ta oxide [J].

Katou, T ;

Lee, B ;

Lu, DL ;

Kondo, JN ;

Hara, M ;

Domen, K .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2003, 42 (21) :2382-2385

← 1 2 3 4 5 →