Share Email Print
cover

Proceedings Paper

New efficient p-n heterojunction of BiOI/TiO2 nanotube arrays with enhanced visible-light photoelectrocatalytic activities
Author(s): Jiaqin Liu; Lili Ruan; Jiajia Hu; Yan Wang; Yucheng Wu
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

New flake-tube structured p-n heterojunction of BiOI/TiO2 nanotube arrays (TNTAs) were successfully prepared by loading large amounts of BiOI nanoflakes onto both the outer and inner walls of well-separated TiO2 nanotubes via anodization followed by sequential chemical bath deposition (S-CBD) method. The as-prepared BiOI/TNTAs samples with different deposition cycles were characterized by X-ray diffraction, electron microscopy, UV-vis diffuse reflectance spectroscopy and nitrogen sorption. The photoelectrocatalytic (PEC) activity of the BiOI/TNTAs samples toward degradation of methyl orange (MO) solutions under visible-light irradiation were further evaluated. The visible-light PEC activity of BiOI/TNTAs samples were further confirmed by the transient photocurrent response test. In this paper, the 5-BiOI/TNTAs sample with the best PEC activity and the highest photocurrent density among all the BiOI/TNTAs samples was chosen as the typical delegates and emphatically discussed. The results from the current study revealed that TNTAs consisting of well-separated nanotubes with large tube spacings were first fabricated via increasing the water proportion in electrolyte to 10 vol. %. The synergetic effects of several factors may contribute to the remarkably enhanced PEC activities of the 5-BiOI/TNTAs sample, including a 3D connected intertube spacing system and open tube-mouth structure, strong visible-light absorption by BiOI, the formation of p-n heterojunction, larger specific surface area, and the impact of the applied external electrostatic field.

Paper Details

Date Published: 7 December 2013
PDF: 12 pages
Proc. SPIE 8923, Micro/Nano Materials, Devices, and Systems, 892338 (7 December 2013); doi: 10.1117/12.2035248
Show Author Affiliations
Jiaqin Liu, Hefei Univ. of Technology (China)
Anhui Key Lab. of Advanced Functional Materials and Devices (China)
Lili Ruan, Hefei Univ. of Technology (China)
Jiajia Hu, Hefei Univ. of Technology (China)
Yan Wang, Hefei Univ. of Technology (China)
Anhui Key Lab. of Advanced Functional Materials and Devices (China)
Yucheng Wu, Hefei Univ. of Technology (China)
Anhui Key Lab. of Advanced Functional Materials and Devices (China)


Published in SPIE Proceedings Vol. 8923:
Micro/Nano Materials, Devices, and Systems
James Friend; H. Hoe Tan, Editor(s)

© SPIE. Terms of Use
Back to Top