Nanostructural characterization of large-scale porous alumina fabricated via anodizing in arsenic acid solution

Shunta Akiya, Tatsuya Kikuchi, Shungo Natsui, Ryosuke O. Suzuki

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Anodizing of aluminum in an arsenic acid solution is reported for the fabrication of anodic porous alumina. The highest potential difference (voltage) without oxide burning increased as the temperature and the concentration of the arsenic acid solution decreased, and a high anodizing potential difference of 340 V was achieved. An ordered porous alumina with several tens of cells was formed in 0.1–0.5 M arsenic acid solutions at 310–340 V for 20 h. However, the regularity of the porous alumina was not improved via anodizing for 72 h. No pore sealing behavior of the porous alumina was observed upon immersion in boiling distilled water, and it may be due to the formation of an insoluble complex on the oxide surface. The porous alumina consisted of two different layers: a hexagonal alumina layer that contained arsenic from the electrolyte and a pure alumina honeycomb skeleton. The porous alumina exhibited a white photoluminescence emission at approximately 515 nm under UV irradiation at 254 nm.

Original languageEnglish
Pages (from-to)652-661
Number of pages10
JournalApplied Surface Science
Volume403
DOIs
Publication statusPublished - 2017 May 1
Externally publishedYes

Keywords

  • Aluminum
  • Anodizing
  • Arsenic acid
  • Nanostructure
  • Porous alumina

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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