Monodisperse Co3O4 quantum dots on porous carbon nitride nanosheets for enhanced visible-light-driven water oxidation

被引:119
|
作者
Zhang, Huayang [1 ]
Tian, Wenjie [1 ]
Zhou, Li [1 ]
Sun, Hongqi [2 ]
Tade, Moses [1 ]
Wang, Shaobin [1 ]
机构
[1] Curtin Univ, Dept Chem Engn, GPO Box U1987, Perth, WA 6845, Australia
[2] Edith Cowan Univ, Sch Engn, 270 Joondalup Dr, Joondalup, WA 6027, Australia
基金
澳大利亚研究理事会;
关键词
Photocatalysis; Water oxidation; Porous g-C3N4; Co3O4 quantum dots; Nanosheets; HYDROGEN-PRODUCTION; PHOTOCATALYTIC ACTIVITIES; GRAPHITIC C3N4; CATALYSTS; EVOLUTION; PHOTOSYNTHESIS; SEMICONDUCTORS; SENSITIZER; FRAMEWORKS; SUNLIGHT;
D O I
10.1016/j.apcatb.2017.03.028
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
Here we report a facile annealing process for homogeneous deposition of Co3O4 quantum dots (Co3O4 QDs) onto porous g-C3N4 nanosheets. It was discovered that pores were catalytically produced around Co3O4 QDs. In the synthesis, annealing temperature was found to be crucial for the textural property, optical absorption, and the corresponding photocatalytic water oxidation as well as photochemical performances. The highest specific surface area, pore volume and optimal 02 production rate as well as the highest photocurrent were obtained on 0.8 wt.% Co3O4 QDs decorated g-C3N4 nanosheets annealed at 300 degrees C (0.8% Co3O4-C3N4-300). These results underline the importance of surface heterojunction and afford us a feasible protocol for rational design of g-C3N4 based photocatalysts for water oxidation. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码:2 / 9
页数:8
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