Hierarchical Anodic TiO2 Nanostructures Formed in Ethylene Glycol/o-H3PO4 Electrolytes for Direct Photocatalysis

Laura Razzaboni, Marco Altomare, Mariapia Pedeferri, Maria Vittoria Diamanti, Patrik Schmuki*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

5 Citations (Scopus)

Abstract

In this work, we describe a simple anodization process of titanium in a hot phosphoric acid/ethylene glycol electrolyte that forms a hierarchically structured photocatalytically active TiO2 layer that consists directly of anatase nanocrystallites. Such anodic layers show, without any annealing, a high photocatalytic degradation activity for AO7 (an azo-dye used as model pollutant) that is higher than the activity of comparable fully crystallized TiO2 nanotube layers. Furthermore, the hierarchically structured layers have a remarkable mechanical bending stability. These features make these novel anodic layers highly promising for applications in flexible substrate based photocatalytic devices.

Original languageEnglish
Pages (from-to)2859-2863
Number of pages5
JournalChemElectroChem
Volume7
Issue number13
DOIs
Publication statusPublished - 1 Jul 2020
Externally publishedYes

Keywords

  • anodization
  • hierarchical nanostructure
  • ortho-phosphoric acid
  • photocatalysis
  • TiO

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