Self-organized, free-standing TiO2 nanotube membrane for flow-through photocatalytic applications

Nano Letters

Volumn 7, Issue 5, 2007, Pages 1286-1289

  Albu, Sergiu P ^a   Ghicov, Andrei ^a   Macak, Jan M ^a   Hahn, Robert ^a   Schmuki, Patrik ^a  

^a UNIVERSITY OF ERLANGEN NUREMBERG   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

CARBON NANOTUBES; PHOTOCATALYSIS;

FLOW-THROUGH PHOTOCATALYTIC REACTIONS; MEMBRANE STRUCTURES;

TITANIUM COMPOUNDS;

EID: 34249751100     PISSN: 15306984     EISSN: None     Source Type: Journal    
DOI: 10.1021/nl070264k     Document Type: Article

References (19)

1. Iijima. S. Helical microtubules of graphitic carbon. Nature 1991, 354, 56-58.
2. Masuda, H.; Fukuda, K. Ordered metal nanohole arrays made by a two-step replication of honeycomb structures of anodic alumina. Science 1995, 268, 1466-1468.
3. Patzke, G. R.; Krumeich, F.; Nesper, R. Oxidic nanotubes and nanorods - anisotropic modules for a future nanotechnology. Angew. Chem., Int. Ed. 2002, 41, 2446-2461.
4. Hoffmann, M. R.; Martin, S. T.; Choi, W.; Bahnemann, D. W. Environmental Applications of Semiconductor Photocatalysis. Chem. Rev. 1995, 95, 69-96.
5. Vlachopoulos, N.; Liska, P.; Augustynski, J.; Graetzel, M. Very efficient visible light energy harvesting and conversion by spectral sensitization of high surface area polycrystalline titanium dioxide films. J. Am. Chem. Soc. 1988, 110, 1216-1220.
6. 2 anatase phase and the development of the photoelectrochemical solar cell. Int. J. Hydrogen Energy 1999, 24, 27-35.
7. Photocatalytic Purification and Treatment of Water and Air; Ollis, D. F., Al-Ekabi, H., Eds.; Elsevier: Amsterdam, 1993.
8. 2 Surfaces: Principles, Mechanisms, and Selected Results. Chem. Rev. 1995, 95, 735-758.
9. 2 nanotubes by anodization of titanium. Angew. Chem., Int. Ed. 2005, 44, 2100-2102.
10. 2 nanotubes. Angew. Chem., Int. Ed. 2005, 44, 7463-7465.
11. 2 nanotubes with hexagonal self-ordering. Phys. Status Solidi (RRL) 2007, 1, R65-R67.
12. 11 All the experiments were carried out at room temperature.
13. 2 atmosphere. This leads to a free standing nanotube layer floating in the etching solution. The layer can be seen by eye and captured by a grit or with tweezers. After being rinsed with methanol and distilled water, the layers were placed (closed tube side down) 1 -2 cm above an open HF 48% bottle for 30 min. This leads to HF condensation at the bottom and preferential etching of the tube bottoms (i.e., the procedure opens the tubes).
14. To open the oxide tubes bottoms the membranes were rinsed with DI water, placed in a Teflon grit, and mounted ∼5 cm above the liquid surface of HF 48% (Merck) contained in a Teflon bottle. After 30 min the membrane was washed with DI water and dried in an Ar stream.
15. 2 output power was used. Percolation kinetics was followed by evaluating the MB absorbance at 668 nm using an Ocean Optics USB2000 spectrometer.
16. 2 powder. Langmuir 1990, 6, 1396-1402.
17. Turchi, C. S.; Ollis, D. F. Mixed reactant photocatalysis: intermediates and mutual rate inhibition. J. Catal. 1989, 119, 483-496.
18. 2 layer. Appl. Catal., B 2006, 64, 290301.
19. 4/HF electrolytes. Electrochem. Commun. 2006, 8, 1321-1325.