Journal article
Visible-Light-Induced and Long-Lived Charge Separation in a Transparent Nanostructured Semiconductor Membrane Modified by an Adsorbed Electron Donor and Electron Acceptor
The Journal of Physical Chemistry Part B, Vol.101(50), pp.10791-10800
1997
Abstract
The preparation of transparent nanostructured TiO2 (anatase) membranes is described. Detailed characterization shows these membranes to be 50 μm thick nanoporous-nanocrystalline structures with associated values for porosity and surface roughness of 50% and 5000, respectively. Modification of these membranes by coadsorption of a ruthenium complex, bis[(4,4‘-dicarboxy-2,2‘-bipyridine)(4,4‘-dimethyl-2,2‘-bipyridine)ruthenium(II)] dichloride (I), and of a viologen, 1-ethyl-1‘-[(4-carboxy-3-hydroxyphenyl)methyl]-4,4‘-bipyridinium perchlorate (II), is also described. Detailed studies show that visible-light-induced electron transfer by electronically excited I to the conduction band of the nanostructured TiO2 membrane is followed by membrane mediated electron transfer to coadsorbed II. Detailed studies also show that, as a consequence of the rectifying properties of the semiconducting membrane, charge separation is long-lived. The possible significance of these findings for the development of a practical water splitting device is considered.
Details
- Title
- Visible-Light-Induced and Long-Lived Charge Separation in a Transparent Nanostructured Semiconductor Membrane Modified by an Adsorbed Electron Donor and Electron Acceptor
- Authors
- Robert Hoyle (Author) - University College DublinJoao Sotomayor (Author) - University College DublinGeoffrey Will (Author) - University College DublinDonald Fitzmaurice (Corresponding Author) - University College Dublin
- Publication details
- The Journal of Physical Chemistry Part B, Vol.101(50), pp.10791-10800
- Publisher
- American Chemical Society
- DOI
- 10.1021/jp9711297
- ISSN
- 1520-5207
- Organisation Unit
- School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 99737875702621
- Output Type
- Journal article
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