Preparation of multilayered porous alumina hollow spheres by anodization of Al particles

Electrochemistry Communications

Ryosuke Sato¹  Takashi Yanagishita²  Toshiaki Kondo²  Hideki Masuda³ 

[1] Corresponding author.;Department of Applied Chemistry, Tokyo Metropolitan University, 1-1 Minamiosawa, Hachioji, Tokyo 192-0397, Japan;Department of Mechanical System Engineering, Aichi University of Technology, 50-2 Manori, Nishihasama-cho, Gamagori, Aichi 443-0047, Japan;

关键词: Multilayered hollow spheres;    Anodization;    Porous alumina;    Al particle;   

DOI  :  

来源: DOAJ

【 摘 要 】

Multilayered porous hollow spheres were obtained by the periodic anodization of small Al particles in different electrolytes and subsequent selective etching. The periodic anodization of small Al particles in concentrated H2SO4 and oxalic acid generated oxide layers on their surface with a periodically modulated solubility in the thickness direction. Hollow spheres composed of multilayered porous alumina shells were prepared by the subsequent etching of residual Al and the oxide layers formed in concentrated H2SO4. The resulting multilayered hollow spheres had a large specific surface area originating from their unique geometrical structure and are expected to find use in various applications such as catalysts, sensors, and drug carriers.

【 授权许可】

Unknown