CdS-loaded flexible carbon nanofiber mats as a platform for solar hydrogen production

被引：30

作者：

Kim, Young Kwang ^{[1
]}

Kim, Minsun ^{[1
]}

Hwang, Sung-Ho ^{[1
]}

Lim, Sang Kyoo ^{[1
]}

Park, Hyunwoong ^{[2
]}

Kim, Soonhyun ^{[1
]}

机构：

[1] Daegu Gyeongbuk Inst Sci & Technol, Nano & Bio Res Div, Taegu 711873, South Korea

[2] Kyungpook Natl Univ, Sch Energy Engn, Taegu 702701, South Korea

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2015年 / 40卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

Solar fuels; Carbon materials; Photocatalysts; Heterojunction; Nanocomposites; PHOTOCATALYTIC ACTIVITY; GRAPHENE OXIDE; QUANTUM DOTS; EVOLUTION; SEMICONDUCTOR; NANOTUBES; NANOCOMPOSITE; NANOPARTICLES; WATER; ADSORPTION;

D O I：

10.1016/j.ijhydene.2014.11.011

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：

Photocatalysis-based solar hydrogen (H-2) has garnered attention as a renewable energy carrier, yet the technology is still immature. For practical operation of photocatalytic H-2 production, we fabricated a novel heterojunction of CdS-loaded flexible carbon nanofiber (CNF) mats. CNF mats were prepared by electrospinning and carbonization. CdS nanoparticles were deposited in alcohol and water solutions by the successive ionic layer adsorption and reaction (SILAR) method. The former solution was found to be more effective in uniformly dispersing CdS particles in the CNF mats. When pristine CNF mats were treated with acid (hereafter CdS/a-CNF), the degree of CdS particle distribution was further enhanced. Moreover, H-2 production was improved by a factor of 3 in an aqueous solution of Na2S (0.1 M) and Na2SO3 (0.1 M) under visible light (lambda > 420 nm). Heat-treatment of CdS/a-CNF mats at 400 degrees C dramatically increased H2 production by 3.6 times due to the improved crystallinity of the CdS particles. In this heterojunction, the CNF mats have three roles: They work as a multi-scalable support for CdS particles, enhance photogenerated charge transfers, and catalyze H-2 evolution. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：136 / 145

页数：10

共 55 条

[1] Facile cd-thiourea complex thermolysis synthesis of phase-controlled CdS nanocrystals for photocatalytic hydrogen production under visible light [J].