The synergy between electronic anchoring effect and internal electric field in CdS quantum dots decorated dandelion-like Fe-CeO2 nanoflowers for improved photocatalytic hydrogen evolution

被引：29

作者：

Ma, Dandan ^{[1
]}

Sun, Diankun ^{[1
]}

Zou, Yajun ^{[1
]}

Mao, Siman ^{[1
]}

Lv, Yixuan ^{[1
]}

Wang, Yao ^{[1
]}

Li, Jun ^{[1
]}

Shi, Jian-Wen ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Ctr Nanomat Renewable Energy, Sch Elect Engn, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Shaanxi, Peoples R China

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2019年 / 549卷

关键词：

Photocatalysis; Hydrogen evolution; Quantum dot; Heterojunction; CdS; FE-DOPED CEO2; VISIBLE-LIGHT; H-2; EVOLUTION; CATALYTIC PERFORMANCE; CARRIER SEPARATION; SHELL NANOWIRES; IRON-OXIDE; EFFICIENT; NANOSHEETS; NANOPARTICLES;

D O I：

10.1016/j.jcis.2019.04.075

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 series of dandelion-like Fe-CeO2/CdS (FeCex/Cd-y) nanoflowers with different molar ratios of Fe-CeO2 to CdS are synthesized by solvothermal method for the first time. The FeCex/Cd-y nanoflowers are assembled by a large number of nanoparticles with the diameter of about 3 nm, and the introduction of Fe ions and the couple of CdS quantum dots (QDs) efficiently enhanced the relative percentage of Ce3+ in CeO2. The as-obtained FeCe1/Cd-1 heterostructure exhibits the highest photocatalytic H-2 evolution ability of 108.9 mu mol/h, which is 20.5, 6.1 and 7.1 times higher than CeO2, Fe-CeO2 and CdS, respectively. This significantly enhanced photocatalytic performance can be mainly attributed to the synergy between the electronic anchoring effect of Fe3+/Fe2+ and Ce4+/Ce3+ redox couples and the internal electric field constructed by the II-type heterojunction between Fe-CeO2 and CdS. This work provides a new idea for the design of efficient photocatalysts by combining the advantages of heterostructure and ion anchoring effect. (C) 2019 Elsevier Inc. All rights reserved.

引用

页码：179 / 188

页数：10

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