ABSTRACT
The photoreaction of the Benzylammoniumsalts in LB-Multilayers was first inve stigated by UV-spectroscopy :
- 0.4 A Irradiation Time (min)
Fig. 6 UV-spectra of 40 monolayers of prepolymerized Benzylammoniumamphiphiles on a hydrophobized quartz support after 2,4,8 and 20 min irradiation time (Osram HBO 100)
Wether the new layer spacing of 30 A corresponds to a non oriented layer or - as
REFERENCES
PHOTOGENERATION OF HYDROGEN: THE PHOTOCHEMICAL WAY
OF STORING SOLAR ENERGY
G.Munuera, A.Fernandez and J.P Espinos
Instituto de Ciencias de Materiales. Centro mixto CSIC-Univ.Sevilla. P.O.Box 1115. Sevilla. SPAIN
ABSTRACT
Water cleavage induced by uv-irradiation of aqueous suspensions of M/Ti02 polycrystalline samples (M=Pt,Rh) has been studied. Only H~ evolu tion was observed while oxygen could not be detected during the experiments The presence of 02 really suppress H? photo-generation while oxygen photo uptake is observea. A mechanism is proposed for the photoinduced water splitting that involves generation of hydrogen and hydrogen peroxide, this latter being retained on the TiO? and probably corroding the TiO? particles without appreciable loss of photo-activity.
