Issue 47, 2011

Photoelectrochemical study of TiO2 inverse opals

Abstract

The optical and photoelectrochemical behaviour of TiO2 inverse opals and TiO2 disordered macroporous structures has been investigated by means of UV-vis spectroscopy, cyclic voltammetry, chronopotentiometry and electrochemical impedance spectroscopy. These techniques, together with photonic band structure calculations, confirmed the better absorption of light of TiO2 inverse opals, due to the slow light phenomenon, and indeed the status of metamaterials for such structures. TiO2 inverse opals and TiO2 disordered macroporous structures are shown to have the same recombination rate of photogenerated charge carriers, but TiO2 inverse opals are characterized by a better reactivity towards O2 which can also contribute to the improvement of the photocatalytic activity observed by several groups.

Graphical abstract: Photoelectrochemical study of TiO2 inverse opals

Supplementary files

Article information

Article type
Paper
Submitted
10 Jun 2011
Accepted
13 Sep 2011
First published
21 Oct 2011

J. Mater. Chem., 2011,21, 19144-19152

Photoelectrochemical study of TiO2 inverse opals

F. Sordello, V. Maurino and C. Minero, J. Mater. Chem., 2011, 21, 19144 DOI: 10.1039/C1JM12674A

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