Synthesis of photocatalytic hematite nanotube array using a template-free solvothermal approach

被引：11

作者：

Jiao, Jiqing ^{[1
,2
]}

Tang, Jianguo ^{[1
,2
]}

Wang, Guoming ^{[1
,2
]}

Wang, Yao ^{[1
,2
]}

Huang, Linjun ^{[1
,2
]}

Huang, Zhen ^{[1
,2
]}

Liu, Jixian ^{[1
,2
]}

Zhu, Yukun ^{[1
,2
]}

Belfiore, Laurence A. ^{[3
]}

机构：

[1] Qingdao Univ, Teachers Coll, Inst Hybrid Mat, Natl Base Int S&T Cooperat Hybrid Mat, Qingdao 266071, Peoples R China

[2] Qingdao Univ, Teachers Coll, Growing Base State Key Lab, Qingdao 266071, Peoples R China

[3] Colorado State Univ, Dept Chem & Biol Engn, Ft Collins, CO 80523 USA

来源：

RSC ADVANCES | 2015年 / 5卷 / 75期

基金：

中国博士后科学基金;

关键词：

ALPHA-FE2O3; THIN-FILMS; WATER PHOTOOXIDATION; NANOPARTICLES; DEPOSITION; PHOTOCURRENT; CONVERSION; NANOWIRES; ULTRATHIN; NANORODS; DIOXIDE;

D O I：

10.1039/c5ra11376h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The paper describes a template-free solvothermal synthesis of alpha-Fe2O3 hollow nanotube arrays over a large area. The columnar nanotubes on the substrate have closed tips and smooth defined walls. The thickness of the nanowall is about 10 nm, which could offer short diffusion distances and decrease recombination of electron-hole pairs. And the preferential orientation is the [110] axis. The cubic Au nanocrystals were decorated by a photocatalytic reduction process, and the corresponding EDX mappings intuitively display the distributions of the composites. Au nanocrystals matched the absorption of alpha-Fe2O3 hollow nanotube arrays, which improved photoactivity under visible light (wavelength > 420 nm). The photoactivity of the sample was investigated based on systematic photoelectrochemical (PEC) measurements. These revealed that the photocurrent density of Au/alpha-Fe2O3 is almost 6 times higher than that of pure alpha-Fe2O3. And its photocurrent density increases to 0.16 mA cm(-2) at 1.23 V-RHE under irradiation. The mechanism of enhanced visible light PEC activity has been discussed using schematics. Hence, the study presents not only a route for formation of alpha-Fe2O3 hollow nanotube arrays but also PEC applications of plasmonic composites.

引用

页码：60920 / 60925

页数：6

共 38 条

[1] Tailoring photocatalytic nanostructures for sustainable hydrogen production [J].