ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
H2 production over dye-sensitized Pt/TiO2 nanoparticles with mesostructures undervisible light was investigated by using methanol as electron donors. Three types of Ru(II) bipyridylcomplexes, which can be attached to Pt/m-TiO2 with different linkage modes, show differentphotosensitization. The dye tightly linked with m-TiO2 has better durability but the lowest H2evolution efficiency, whereas the loosely attached dyes possess higher H2 evolution efficiency andpreferable durability. It seems that the dynamic equilibrium between the linkage of ground state dyewith TiO2 and the divorce of oxidization state dye from the surfaces plays a crucial role in thephotochemical behavior during photocatalyst sensitization process. The binuclear Ru(II) shows abetter photosensitization in comparison with mono- nuclear Ru(II) dyes due to its large conjugationsystem and “antenna effect”, which, in turn, improve the visible light harvesting and electrontransfer between the dye and TiO2
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/41/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.47-50.825.pdf
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