Mesoporous carbon/graphitic carbon nitride spheres for photocatalytic H2 evolution under solar light irradiation

被引：29
作者：
Baca, M. [1 ]
Dworczak, M. [1 ]
Aleksandrzak, M. [1 ]
Mijowska, E. [1 ]
Kalenczuk, R. J. [1 ]
Zielinska, B. [1 ]
机构：
[1] West Pomeranian Univ Technol, Fac Chem Technol & Engn, Nanomat Physicochem Dept, Piastow Ave 45, PL-70311 Szczecin, Poland
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2020年 / 45卷 / 15期
关键词：
Graphitic carbon nitride; Mesoporous carbon; Hybrid photocatalysts; Hydrogen generation; HYDROGEN EVOLUTION; QUANTUM DOTS; EFFICIENT; G-C3N4; COMPOSITES; CATALYST; NANOCOMPOSITE; CONVERSION; HYBRIDS; ENERGY;
D O I：
10.1016/j.ijhydene.2020.01.105
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：
Herein, two different photocatalytic composites based on ordered (OCS) and disordered (DCS) mesoporous hollow carbon spheres and graphitic carbon nitride (gCN) have been successfully fabricated through facile acid treatment. The influence of carbon shell morphology of the spheres on gCN loading and photocatalytic H-2 production under simulated solar light irradiation has been revealed. The amount of evolved H-2 was similar to 6.2 (OCS/gCN) and similar to 5.3 (DCS/gCN) times higher in comparison to pristine gCN. It was found that graphitic carbon nitride was much more homogenously supported onto ordered mesoporous carbon spheres than disordered ones. The deposition of gCN onto ordered carbon spheres was found to be more efficient to increase carrier concentration, enhance photogenerated charge carrier transport and separation. It is assigned to the formation of the graphitic carbon nitride/carbon heterojunction facilitating the contact surface between the two phases of hybrid. Therefore, via tuning of the morphology of carbon shell being a host for gCN it was possible to find more promising candidate as a photocatalyst in H-2 production under solar light irradiation. (C) 2020 The Authors. Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC.
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收藏
页码：8618 / 8628
页数：11
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