Visible-Light Photocatalytic Activity of N-Doped TiO2 Nanotube Arrays on Acephate Degradation

Highly ordered nitrogen-doped titanium dioxide (N-doped TiO2) nanotube arrays were prepared by anodic oxidation method and then annealed in a N2 atmosphere to obtain N-doped TiO2 nanotube arrays. The samples were characterized with scanning electron microscope (SEM), X-ray powder diffraction (XRD),...

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Bibliographic Details
Published in:Journal of nanomaterials 2015-01, Vol.2015 (2015), p.1-6
Main Authors: Fan, Ding, Gu, Yufen, Zhou, Juan, Zhang, Xinlei
Format: Article
Language:English
Subjects:
Adsorption
Annealing
Arrays
Atmospheres
Crystal structure
Degradation
Dielectric properties
Doping
Laboratories
Light
Nanomaterials
Nanostructure
Nonferrous metals
Photocatalysis
Photodegradation
Scanning electron microscopy
Studies
Titanium dioxide
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Summary:Highly ordered nitrogen-doped titanium dioxide (N-doped TiO2) nanotube arrays were prepared by anodic oxidation method and then annealed in a N2 atmosphere to obtain N-doped TiO2 nanotube arrays. The samples were characterized with scanning electron microscope (SEM), X-ray powder diffraction (XRD), X-ray photoelectron spectrum (XPS), and UV-visible spectrophotometry (UV-vis) spectrum. Degradation of the insecticide acephate under the visible light was used as a model to examine the visible-light photocatalytic activity of N-doped TiO2 nanotube arrays. The results show that N type doping has no notable effects on the morphology and structure of TiO2 nanotube arrays. After N type doping, the N replaces a small amount of O in TiO2, forming an N–Ti–O structure. This shifts the optical absorption edge and enhances absorption of the visible light. N-doped TiO2 nanotube arrays subjected to annealing at 500°C in N2 atmosphere show the strongest photocatalytic activity and reach a degradation rate of 84% within 2 h.
ISSN:1687-4110
1687-4129
DOI:10.1155/2015/527070