Ag3PO4 Oxygen Evolution Photocatalyst Employing Synergistic Action of Ag/AgBr Nanoparticles and Graphene Sheets

被引：131

作者：

Hou, Yang ^{[1
]}

Zuo, Fan ^{[1
]}

Ma, Quan ^{[1
]}

Wang, Chen ^{[1
]}

Bartels, Ludwig ^{[1
]}

Feng, Pingyun ^{[1
]}

机构：

[1] Univ Calif Riverside, Dept Chem, Riverside, CA 92521 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2012年 / 116卷 / 38期

基金：

美国国家科学基金会;

关键词：

HYDROGEN-PRODUCTION; H-2-PRODUCTION ACTIVITY; WATER; SEMICONDUCTOR; COCATALYSTS; HYBRID;

D O I：

10.1021/jp303219j

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：

A graphene-supported Ag3PO4/Ag/AgBr water oxidation photocatalyst was prepared by a photoassisted deposition-precipitation reaction, followed by a hydrothermal treatment. The composite photocatalyst exhibits double the O-2-production activity than that of bare Ag3PO4 under visible light irradiation. Moreover, it exhibits enhanced activity in comparison to unsupported Ag3PO4/Ag/AgBr, to graphene-supported bare Ag3PO4 powder as well as to Ag/AgBr powder. This increase in activity is attributed to a combination of depletion of the conduction band of the as-synthesized n-doped Ag3PO4 material and a downshift of the Ag3PO4 valence band due to the pinning of its conduction band at the silver Fermi level, a process that is assisted by charge transfer and distribution onto the graphene support.

引用

页码：20132 / 20139

页数：8

共 47 条

[1] Lateral manipulation of single Cu atoms on flat and stepped copper surfaces [J].

Bartels, L ;

Meyer, G ;

Rieder, KH .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1998, 16 (03) :1047-1049

[2] Facile synthesis of rhombic dodecahedral AgX/Ag3PO4 (X = Cl, Br, I) heterocrystals with enhanced photocatalytic properties and stabilities [J].

Bi, Yingpu ;

Ouyang, Shuxin ;

Cao, Junyu ;

Ye, Jinhua .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2011, 13 (21) :10071-10075

[3] Sustainable hydrogen production by the application of ambient temperature photocatalysis [J].

Bowker, Michael .

GREEN CHEMISTRY, 2011, 13 (09) :2235-2246

[4] Semiconductor-based Photocatalytic Hydrogen Generation [J].

Chen, Xiaobo ;

Shen, Shaohua ;

Guo, Liejin ;

Mao, Samuel S. .

CHEMICAL REVIEWS, 2010, 110 (11) :6503-6570

[5] In situ ion exchange synthesis of the novel Ag/AgBr/BiOBr hybrid with highly efficient decontamination of pollutants [J].

Cheng, Hefeng ;

Huang, Baibiao ;

Wang, Peng ;

Wang, Zeyan ;

Lou, Zaizhu ;

Wang, Junpeng ;

Qin, Xiaoyan ;

Zhang, Xiaoyang ;

Dai, Ying .

CHEMICAL COMMUNICATIONS, 2011, 47 (25) :7054-7056

[6] BiVO4 as a Visible-Light Photocatalyst Prepared by Ultrasonic Spray Pyrolysis [J].

Dunkle, Scott S. ;

Helmich, Richard J. ;

Suslick, Kenneth S. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (28) :11980-11983

[7] Influence of Excitation Wavelength (UV or Visible Light) on the Photocatalytic Activity of Titania Containing Gold Nanoparticles for the Generation of Hydrogen or Oxygen from Water [J].

Gomes Silva, Claudia ;

Juarez, Raquel ;

Marino, Tiziana ;

Molinari, Raffaele ;

Garcia, Hermenegildo .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2011, 133 (03) :595-602

[8] Solar Fuels via Artificial Photosynthesis [J].

Gust, Devens ;

Moore, Thomas A. ;

Moore, Ana L. .

ACCOUNTS OF CHEMICAL RESEARCH, 2009, 42 (12) :1890-1898

[9]

Hashim A., 2011, ADV NANOCOMPOSITE TE

[10] Electrocatalytic Activity of Graphene Multi layers toward I-/I3-: Effect of Preparation Conditions and Polyelectrolyte Modification [J].

Hasin, Panitat ;

Alpuche-Aviles, Mario A. ;

Wu, Yiying .

JOURNAL OF PHYSICAL CHEMISTRY C, 2010, 114 (37) :15857-15861

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