Journal of Surface Engineered Materials and Advanced Technology

Volume 8, Issue 4 (October 2018)

ISSN Print: 2161-4881   ISSN Online: 2161-489X

Google-based Impact Factor: 1.23  Citations  h5-index & Ranking

Characterization of Surface Oxide Layers on Black-Colored Titanium

HTML  XML Download Download as PDF (Size: 2281KB)  PP. 71-82  
DOI: 10.4236/jsemat.2018.84007    632 Downloads   1,053 Views  

ABSTRACT

Black-colored titanium was obtained by anodic oxidation of a commercially pure grade-1 titanium sheet in a 0.06 M NH4NO3 solution, followed by heat treatment at 773 K for 1 h in a vacuum furnace. The resulting oxide layer on the titanium substrate was examined by X-ray photoelectron spectroscopy, X-ray diffraction, glow discharge spectroscopy, and scanning electron microscopy. It was found that the oxide layer on the black-colored titanium sheet was several micrometers thick and mainly consisted of rutile TiO2 exhibiting a sponge like nanoporous structure. It is considered that the black-colored appearance of the titanium sheet is due to the sponge like nanoporous structure of the oxide layer absorbing the incident light. The photocatalytic activity of the black-colored titanium sheet was examined by observing the decomposition of a methylene blue (MB, C16H18N3SCl) solution under ultraviolet irradiation due to the existence of rutile TiO2. The sheet also exhibited photocatalytic activity under visible light irradiation. It is believed that the photocatalytic response upon irradiation with white light is due to carbon doping of the titanium oxide layer on the titanium substrate.

Share and Cite:

Kaneko, M. , Tokuno, K. , Yamagishi, K. , Wada, T. and Hasegawa, T. (2018) Characterization of Surface Oxide Layers on Black-Colored Titanium. Journal of Surface Engineered Materials and Advanced Technology, 8, 71-82. doi: 10.4236/jsemat.2018.84007.

Cited by

No relevant information.

Copyright © 2021 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.