NDLI: Self-organized TiO$_{2}$ nanotube arrays in the photocatalytic degradation of methylene blue under UV light irradiation

Content Provider	Springer Nature Link
Author	Chung, Eun Hyuk Yu, Seong Mi Jung, Ok sang Baek, Seong Rim Hong, Tae Eun Kim, Hyun Gyu Khan, F. Nawaz Jeong, Euh Duck Kim, Jong Pil Bae, Jong Seong
Copyright Year	2015
Abstract	Nanostructured titanium dioxide (NTiO$_{2}$) is known to possess efficient photocatalytic activity and to have diverse applications in many fields due to its chemical stability, high surface area/volume ratio, high transmittance, and high refractive index in the visible and the near-ultraviolet regions. These facts prompted us to develop TiO$_{2}$ nanotube (TiO$_{2}$ NT) arrays through electrochemical anodic oxidation involving different electrolytes comprised of phosphoric acid — hydrofluoric acid aqueous systems by varying the voltage and the time. The annealing temperature of the nanotubes, TiO$_{2}$ NTs, were varied to modify the surface morphology and were characterized by using X-ray diffraction and scanning electron microscopy. Scanning electron microscopy and X-ray diffraction results showed that the samples had uniform morphologies and good crystalline structures of the anatase phase at lower annealing temperatures and of the rutile phase at higher annealing temperatures. A secondary-ion mass-spectrometry analysis was used to investigate the surface atoms and to conduct a depth profile analysis of the TiO$_{2}$ NTs. The efficiency of the photocatalytic activity of the TiO$_{2}$ NT arrays in degrading methylene blue (MB) was investigated under UV-Vis light irradiation. The maximum photocatalytic activity was achieved for the samples with lower annealing temperatures due to their being in the anatase phase and having a higher surface area and a smaller crystal size, which play important roles in the degradation of organic pollutants.
Starting Page	1135
Ending Page	1139
Page Count	5
File Format	PDF
ISSN	03744884
Journal	Journal of the Korean Physical Society
Volume Number	66
Issue Number	7
e-ISSN	19768524
Language	English
Publisher	The Korean Physical Society
Publisher Date	2015-04-16
Publisher Place	Seoul
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Electrochemical anodic oxidation Theoretical, Mathematical and Computational Physics Photocatalytic behaviors TiO$_{2}$ nanotube arrays Physics Particle and Nuclear Physics Methylene blue
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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