Carbon doping of self-organized TiO2 nanotube layers by thermal acetylene treatment

被引:102
作者
Hahn, Robert
Ghicov, Andrei
Salonen, Jarno
Lehto, Vesa-Pekka
Schmuki, Patrik
机构
[1] Univ Erlangen Nurnberg, Dept Mat Sci & Engn, Chair Surface Sci & Corros, WWIV LKO, D-91058 Erlangen, Germany
[2] Univ Turku, Dept Phys, Lab Ind Phys, FIN-20014 Turku, Finland
关键词
D O I
10.1088/0957-4484/18/10/105604
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Self-organized layers of TiO2 nanotubes were formed by electrochemical anodization of Ti in a HF/Na2HPO4 electrolyte. The tubes were treated at 500 degrees C under a mixed flux of N-2 and acetylene (C2H2). The samples were characterized using SEM, XRD and photoelectrochemical measurements. The results show that the acetylene treated tube layers exhibit a significant photoresponse over the whole range of visible light up to the near-IR region (1.5 eV). This carbon doping treatment at comparable mild conditions does not lead to any structural damage to the morphology of the nanotubes.
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