Details

Autor(en) / Beteiligte

• Sopha, Hanna
• Podzemna, Veronika
• Hromadko, Ludek
• Macak, Jan M.

Titel

Preparation of porcupine-like Bi2O3 needle bundles by anodic oxidation of bismuth

Ist Teil von

• Electrochemistry communications, 2017-11, Vol.84, p.6-9

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• A new Bi2O3 structure resembling bundles of needles was prepared by anodic oxidation of a bismuth substrate in H2SO4 electrolyte followed by annealing in air. Needle growth occurred on the timescale of minutes. The resulting porcupine-like needle bundles were characterized using SEM and XRD before and after annealing. The as-grown needles consisted of bismuth aqua sulfate hydroxide; however, upon annealing at 250°C in air, tetragonal β-Bi2O3 was produced without any morphological change. [Display omitted] •Breakdown anodization of Bi substrates in H2SO4 electrolyte was carried out.•Bismuth aqua sulfate hydroxide needle bundles were produced as a result.•Upon subsequent annealing in air at 250°C, tetragonal β-Bi2O3 needles were formed.•The anodic growth of the needles was investigated in detail.