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

被引：72
|
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
收藏
页码：2634 / 2641
页数：8
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