Hydrothermal preparation and characterization of nanostructured CNTs/ZnFe2O4 composites for solar water splitting application

被引：31
作者：
Dang, Haifeng [1 ]
Qiu, Yongfu [1 ]
Cheng, Zhiyu [1 ]
Yang, Wei [2 ]
Wu, Huayi [3 ]
Fan, Hongbo [1 ]
Dong, Xinfa [2 ]
机构：
[1] Dongguan Univ Technol, Coll Chem & Environm Engn, Guangdong Engn & Technol Res Ctr Adv Nanomat, Dongguan 523808, Peoples R China
[2] S China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Guangdong, Peoples R China
[3] Xiamen Med Coll, Dept Pharm, Xiamen 361008, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2016年 / 42卷 / 08期
关键词：
Solar; ZnFe2O4; Carbon nanotubes; Water splitting; H-2; MULTIWALLED CARBON NANOTUBES; HYDROGEN EVOLUTION; ZNFE2O4; PHOTOCATALYST; HYBRID; NANOCOMPOSITE; DEGRADATION; GENERATION; CATALYST; TITANIA;
D O I：
10.1016/j.ceramint.2016.03.019
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Multi-walled carbon nanotubes (CNTs)/ZnFe2O4 composites were fabricated hydrothermally via direct growth of ZnFe2O4 nanoparticles on the CNTs surface. The as-obtained samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), and UV-visible diffuse reflectance spectra (UV-vis DRS) techniques. The photocatalytic performance was evaluated by water splitting in methanol aqueous solution under high-pressure Hg lamp illumination. The effects of CNTs content in the composites on the solar H-2 generation activity were investigated comparatively. Compared with bare ZnFe2O4, the CNTs/ZnFe2O4 hybrid exhibited enhanced photocatalytic H2 evolution activity. The photoluminescence emission spectra (PL) showed that the fluorescence of CNTs/ZnFe2O4 composites was quenched significantly in comparison with that of pristine ZnFe2O4, indicating that an enhanced charge carrier separation efficiency was achieved. Also, a probable mechanism of CNTs for the enhancement of H-2 evolution performance is proposed and discussed. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码：10520 / 10525
页数：6
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