Journal article

ELECTRON-TRANSFER IN AQUEOUS COLLOIDAL SNO2 SOLUTIONS

P MULVANEY, F GRIESER, D MEISEL

LANGMUIR | AMER CHEMICAL SOC | Published : 1990

Abstract

Electron-transfer reactions on transparent colloidal Sn02 have been examined by use of radiolytically generated reducing radicals, direct band-gap excitation, and photosensitization using Ru(bpy)32+. Colloidal Sn02 was found to be cathodically stable under the reducing conditions examined. Quantitative amounts of H2 formed in solution following electron transfer from radiolytically generated isopropyl alcohol radicals. No hydrogen, however, was produced if the sol was illuminated at 300 nm, even in the presence of a hole scavenger. Yet, if the electron acceptor methylviologen was present, the characteristic blue color of the viologen radical formed readily with time of illumination. Charge t..

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