Journal of Inorganic Materials

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Fabrication of Tin Dioxide Nanotubes by Anodic Oxidation

HAN Wei-Qing, ZHOU Gang, WANG Lian-Jun, SUN Xiu-Yun, LI Jian-Sheng   

  1. School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
  • Received:2006-06-07 Revised:2006-09-07 Published:2007-05-20 Online:2007-05-20

Abstract:

The formation of tin dioxide nanotubes on tin substrates anodizing in oxalic acid electrolytes and annealing in the air was investigated. Under optimized electrolyte, oxidation and anneal conditions, nanotubes of tin dioxide were fabricated. Topologies of the anodized tin change remarkably along with applied voltages, electrolyte concentration and oxidation time. Field emission scanning electron microscope (FE-SEM), X-ray diffraction (XRD) and poresizer indicate the nanotubes are formed due to the competition of tin monoxide formation and dissolution under the assistance of electric field. The formation mechanism of nanotubes agrees with the theoretic model of oxidation-dissolution.

Key words: anodization, tin dioxide, nanotube

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