Micro-arc oxidized S-TiO2 nanoporous layers: Cationic or anionic doping?

被引：25
作者：
Bayati, M. R. [1 ,2 ]
Moshfegh, A. Z. [3 ]
Golestani-Fard, F. [1 ,2 ]
机构：
[1] Iran Univ Sci & Technol, Sch Met & Mat Engn, Tehran, Iran
[2] Iran Univ Sci & Technol, Ctr Excellence Adv Mat, Tehran, Iran
[3] Sharif Univ Technol, Dept Phys, Tehran, Iran
来源：
MATERIALS LETTERS | 2010年 / 64卷 / 20期
关键词：
Micro arc oxidation; TiO2; Sulfur; Doping; Nanomaterials; Porosity; S-DOPED TIO2; PLASMA ELECTROLYTIC OXIDATION; NANO-POROUS LAYERS; VISIBLE-LIGHT; TI-6AL-4V ALLOY; PHOTOCATALYTIC ACTIVITIES; TITANIUM-DIOXIDE; METHYLENE-BLUE; GROWTH; FILMS;
D O I：
10.1016/j.matlet.2010.07.010
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
S-doped TiO2 layers were grown on titanium substrates by MAO process. SEM results revealed a porous morphology with a pore size of 40-100 am. Our XRD analysis showed that the anatase relative content reached its maximum value at the voltage of 500 V. The existence of sulfur in the states of S4+ and S6+ which substituted Ti4+ in the titania crystalline lattice was confirmed by XPS results; meanwhile, no S2- was detected. That is, a cationic doping was observed. EDS results showed that sulfur concentration ill the layers increased with the voltage. The band gap energy was also calculated as 2.29 eV employing a UV-Vis spectrophotometer. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：2215 / 2218
页数：4
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