Facile synthesis of ultrafine CuS nanocrystalline/TiO2: Fe nanotubes hybrids and their photocatalytic and Fenton-like photocatalytic activities in the dye degradation

被引:35
作者
He, H. -Y. [1 ]
机构
[1] Shaanxi Univ Sci & Technol, Coll Mat Sci & Engn, Xian 710021, Peoples R China
关键词
Nanotubes; Heterojunction; Hybrids; Photocatalytic properties; Fenton-like reaction; DOPED TIO2 FILMS; TITANIA NANOTUBES; ARRAYS; FABRICATION; NANOFIBERS; DEPOSITION; DIOXIDE;
D O I
10.1016/j.micromeso.2016.02.038
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Interface-induced effect and large specific surface area of heteronano-structures are attracting much attentions due to applications in photocatalysis. In this work, ultrafine CuS nanocrystalline/Fe-doped TiO2 nanotubes hybrids were fabricated with facile methods. The effect of the ratio of CuS to Fe-doped TiO2 nanotubes (NTs) on the microstructural, optical and photocatalytic properties of the NTs and hybrids were studied. The NTs showed an actual Fe content of similar to 2.93 at % and an optical bandgap of -3.00 eV. The bandgap of the hybrids were similar to 2.50-2.95 eV decreased with increasing CuS/NTs ratio. The specific surface area of the NTs was similar to 333 m(2) g(-1). Whereas the hybrids showed remarkably larger specific surface area of similar to 794-1100 m(2) g(-1) than the NTs because of well controlled formation process of CuS nanoparticles. The sunlight-excited degradation experiments of malachite green in the water indicated that the photo- and photo-Fenton-like catalytic activity of the hybrids was higher than that of the NTs and increased with increasing CuS/NTs ratio. The quasi-kinetic first-order rate constant was in the range of similar to 0.260-1.181 h(-1) and increased to similar to 3.932-10.597 h(-1) in the present of the H2O2 aqueous solution with a concentration of 20 ml l(-1). The high photocatalytic activity of the hybrids was mainly ascribed to the narrow bandgap, large specific surface area and effective heterojunction. (C) 2016 Elsevier Inc. All rights reserved.
引用
收藏
页码:31 / 38
页数:8
相关论文
共 43 条
[1]   Formation of titania nanotubes with high photo-catalytic activity [J].
Adachi, M ;
Murata, Y ;
Harada, M ;
Yoshikawa, S .
CHEMISTRY LETTERS, 2000, (08) :942-943
[2]  
BAHNEMANN D, 1994, AQUATIC AND SURFACE PHOTOCHEMISTRY, P261
[3]   PREDICTION OF FLATBAND POTENTIALS AT SEMICONDUCTOR-ELECTROLYTE INTERFACES FROM ATOMIC ELECTRONEGATIVITIES [J].
BUTLER, MA ;
GINLEY, DS .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1978, 125 (02) :228-232
[4]   The effect of electrolyte composition on the fabrication of self-organized titanium oxide nanotube arrays by anodic oxidation [J].
Cai, QY ;
Paulose, M ;
Varghese, OK ;
Grimes, CA .
JOURNAL OF MATERIALS RESEARCH, 2005, 20 (01) :230-236
[5]   Characterization of CuS nanocrystalline thin films synthesized by chemical bath deposition and dip coating techniques [J].
Chaki, Sunil H. ;
Deshpande, M. P. ;
Tailor, Jiten P. .
THIN SOLID FILMS, 2014, 550 :291-297
[6]  
Chen Q, 2002, ADV MATER, V14, P1208, DOI 10.1002/1521-4095(20020903)14:17<1208::AID-ADMA1208>3.0.CO
[7]  
2-0
[8]   THE ROLE OF METAL-ION DOPANTS IN QUANTUM-SIZED TIO2 - CORRELATION BETWEEN PHOTOREACTIVITY AND CHARGE-CARRIER RECOMBINATION DYNAMICS [J].
CHOI, WY ;
TERMIN, A ;
HOFFMANN, MR .
JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (51) :13669-13679
[9]   Single-Step Synthesis of SnS2 Nanosheet-Decorated TiO2 Anatase Nanofibers as Efficient Photocatalysts for the Degradation of Gas-Phase Diethylsulfide [J].
Christoforidis, Konstantinos C. ;
Sengele, Armelle ;
Keller, Valerie ;
Keller, Nicolas .
ACS APPLIED MATERIALS & INTERFACES, 2015, 7 (34) :19324-19334
[10]   Highly porous (TiO2-SiO2-TeO2)/Al2O3/TiO2 composite nanostructures on glass with enhanced photocatalysis fabricated by anodization and sol-gel process [J].
Chu, SZ ;
Inoue, S ;
Wada, K ;
Li, D ;
Haneda, H ;
Awatsu, S .
JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (27) :6586-6589