Insertion of nanostructured titanates into the pores of an anodised TiO2 nanotube array by mechanically stimulated electrophoretic deposition

Author(s)

Martins, Alysson S. ; Harito, Christian ; Bavykin, Dmitry V. ; Walsh, Frank C. ; Lanza, Marcos R. V.

• Document type: Journal article
• Source: JOURNAL OF MATERIALS CHEMISTRY C; v. 5, n. 16, p. 3955-3961, APR 28 2017.
• Web of Science Citations: 3

Abstract

TiO2 nanotube (TiO2NT) surfaces can achieve a high area surface and enhanced electrocatalytic properties. One of the key challenges is the insertion of nanostructured titanates deeply into the pores of TiO2NT. We describe the electrophoretic deposition (EPD) of two different titanates - nanosheets (TiNSs) and nanotubes (TiNTs) into the pores of TiO2NT to produce controlled hierarchical surfaces. A sufficiently high applied cell potential and mechanical stimulation of the surface are important to incorporate TiNSs and TiNTs inside the pores of TiO2NTs. The electrodes show improved hydrophobicity after deposition of titanates. The beneficial effect of a counter electrode equipped with a brush to avoid the accumulation of a thick outer layer on TiO2NTs is highlighted. (AU)

• FAPESP's process: 13/08543-3 - Development of modified TiO2 nanotubes for electrochemical treatment of endocrine disruptors: bisphenol a and n-propylparaben
• Grantee: Alysson Stefan Martins
• Support type: Scholarships in Brazil - Doctorate
• FAPESP's process: 15/08815-9 - Preparation and characterization of nanostructured modified titanates into a TiO2 nanotube array by electrophoretic deposition
• Grantee: Alysson Stefan Martins
• Support type: Scholarships abroad - Research Internship - Doctorate
• FAPESP's process: 16/01937-4 - Synthesis of binary metal oxides (Nb, Zr, ta, Ru, mo and co) supported on amorphous carbon for the production of gas diffusion electrodes (GDE) for the electrosynthesis of H2O2 in situ in flow reactors
• Grantee: Marcos Roberto de Vasconcelos Lanza
• Support type: Regular Research Grants