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Anodic Oxidation of Bismuth Towards Various Nanostructures

Monday, 1 October 2018: 14:40
Universal 2 (Expo Center)
H. Sopha and J. M. Macak (University of Pardubice)
The synthesis of highly-ordered nanostructures of valve metal oxides has recently attracted huge scientific and technological interest motivated by their possible use in many applications. The two most established members of this group of materials are nanoporous Al2O3 and TiO2 nanotubes [1,2]. While Al2O3 membranes have been since than widely used as template material of choice for a range of materials [3-5] due to the flexibility of the pore diameter/length and the relative ease of the Al2O3 dissolution, TiO2 nanotubes received high attention because of their applications in e.g. photocatalysis, water splitting, solar cells and biomedical uses [6].

Bismuth oxide is another interesting material and its nanostructures show an enhanced photoelectrochemical performance [7,8]. However, the formation of bismuth nanostructures, such as bismuth oxide nanopores [7, 8] or bismuth phosphate nanorods [9], by anodization is not well explored by now.

Similar to the formation of nanoporous Al2O3, nanostructured Bi2O3 can be produced in acidic, F--free electrolytes [10]. In this presentation, we will demonstrate the anodization of bismuth in various electrolytes towards morphologically very interesting Bi2O3 nanostructures with many potential applications.

References

  1. H. Masuda, K. Fukuda, Science, 268 (1995) 1466.
  2. J.M. Macak et al., Curr. Opin. Solid State Mater. Sci. 1-2 (2007) 3.
  3. K. Nielsch, F. Müller, A.-P. Li, U. Gösele, Adv. Mater. 12 (2000) 582.
  4. H. Asoh et al., J. Electrochem. Soc. 148 (2001) B152.
  5. J. Kolar, J. M. Macak, K. Terabe, T. Wagner, J. Mater. Chem. C, 2 (2014) 349.
  6. K. Lee, A. Mazare, P. Schmuki, Chem. Rev. 114 (2014) 9385.
  7. X. Lv, J. Zhao, X. Wang, X. Xu, L. Bai, B. Wang, J. Solid. Stat Electrochem. 17 (2013) 1215.
  8. K.C. Chitrada, K. S. Raja, R. Gakhar, D. Chidambaram, J. Electrochem. Soc. 162 (2015) H380.
  9. M. Yang, N. K. Shrestha, R. Hahn, P. Schmuki, Electrochem. Solid-State Lett. 13 (2010) C5.
  10. H. Sopha, V. Podzemna, L. Hromadko, J. M. Macak, Electrochem. Commun. 84 (2017) 6-9.