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

页码：2215 / 2218

页数：4

共 26 条

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