Carbon Quantum Dot/Silver Nanoparticle/Polyoxometalate Composites as Photocatalysts for Overall Water Splitting in Visible Light

被引：70

作者：

Liu, Juan ^{[1
,2
]}

Zhang, Hengchao ^{[1
,2
]}

Tang, Di ^{[1
,2
]}

Zhang, Xing ^{[1
,2
]}

Yan, Likai ^{[3
]}

Han, Yuzhi ^{[1
,2
]}

Huang, Hui ^{[1
,2
]}

Liu, Yang ^{[1
,2
]}

Kang, Zhenhui ^{[1
,2
]}

机构：

[1] Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Jiangsu, Peoples R China

[2] Soochow Univ, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Suzhou 215123, Jiangsu, Peoples R China

[3] NE Normal Univ, Inst Funct Mat Chem, Fac Chem, Changchun 130024, Peoples R China

来源：

CHEMCATCHEM | 2014年 / 6卷 / 09期

基金：

中国国家自然科学基金;

关键词：

photochemistry; polyoxometalates; quantum dots; silver; water splitting; HIGHLY EFFICIENT; PLASMONIC PHOTOCATALYST; HYDROGEN-PRODUCTION; OXYGEN EVOLUTION; CHARGE-TRANSFER; GRAPHENE OXIDE; POLYOXOMETALATE; IRRADIATION; SEMICONDUCTOR; METAL;

D O I：

10.1002/cctc.201402227

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 design of photocatalysts for overall water splitting in visible light remains a huge challenge. Carbon quantum dots (CQDs)/Ag/Ag3PW12O40 nanocomposites have high photocatalytic activities for overall water splitting in visible light without electron acceptors or hole scavengers. In the present system, H-2 evolution was performed on Ag particles. O-2 evolution appears to be a result of the oxidation of H2O on the valence band of Ag3PW12O40, which is enhanced by promoted electron-transfer events at hybrid interfaces of the polyoxometalates and CQDs. The synergistic effects of CQDs, Ag, and Ag3PW12O40 enable the design of a water-splitting catalyst with a remarkably improved efficiency (with an active region of <650nm; apparent quantum yield approximate to 4.9% at 480nm) and operational stability.

引用

页码：2634 / 2641

页数：8

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