Visible-light-induced and long-lived charge separation in a transparent nanostructured semiconductor membrane modified by an adsorbed electron donor and electron acceptor

被引:38
作者
Hoyle, R [1 ]
Sotomayor, J [1 ]
Will, G [1 ]
Fitzmaurice, D [1 ]
机构
[1] UNIV COLL DUBLIN,DEPT CHEM,DUBLIN 4,IRELAND
来源
JOURNAL OF PHYSICAL CHEMISTRY B | 1997年 / 101卷 / 50期
关键词
D O I
10.1021/jp9711297
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The preparation of transparent nanostructured TiO2 (anatase) membranes is described. Detailed characterization shows these membranes to be 50 mu m 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.
引用
收藏
页码:10791 / 10800
页数:10
相关论文
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