Photoelectrochemistry, Photocatalysis and Photoreactors Fundamentals and Developments

This book collects the lectures delivered by the Authors during the NATO ASI "Fundamentals and Developments of Photocatalytic and Photoelectrochemical Processes", held in Erice (Trapani, Italy) from May 20th to June 2nd 1984. The ASI was devoted to the general field of photochemical conversion and storage of solar energy. It had the aim of defining the "state of art" and of outlining perspectives, lines of development and practic al utilization of this form of energy. The world energy crisis has stimulated scientists to investigate new routes for finding and testing methods and processes for obtaining renewable and cheap sources of energy. Within this framework, the possibility of solar energy utilization on a large scale must overcome the stage of discovering efficient processes for the photochemical conversion and for the storage. The most promising way for achieving this goal seems the photosplitting of water and related reactions. The methods for obtaining the water photosplitting are essentially based on photoelectrochemical cells and on photocatalytic systems (gas-solid and gas-liquid-solid). Extensive research work is currently done all over the world both in universities and in industrial laboratories in these areas. The ASI has given to the audience a general view of the fundamental aspects and as much as possible a detailed insight of the various methods and processes. A section has been also devoted to the photoreactors, a field in which the interest is ix x FOREWORD steadily increasing and whose development is essential for the practical exploitation of the various methods.

Klappentext
Proceedings of the NATO Advanced Study Institute on Fundamentals and Developments of Photocatalytic and Photoelectrochemical Processes, Erice, Trapini, Italy, May 20-June 2, 1984

Inhalt
Electronic states in ionic solids.- Semiconductor electrodes and their interaction with light.- Kinetic aspects in photoelectrochemical solar cells.- Choosing a photoelectrode.- Materials engineering: General considerations.- Concluding remarks on: Photoelectrochemistry.- Fundamental aspects of photochemistry and photophysics of transition metal complexes.- Photostorage of solar energy in colloidal semiconductor systems.- Redox catalysis in photochemical and photoelectrochemical solar energy conversion systems.- Effect of organized assemblies on electron transfer reactions and charge separation processes.- Photoassisted cleavage of hydrogen sulfide with semiconductor particles. The thiosulfate cycle.- Photocatalytic reactions of organic compounds. Hydrogen generation from organics and degradation of wastes.- Prospectives of exploitation of photocatalytic and photoelectrochemical processes for solar energy conversion.- Applications of picosecond absorption and emission spectroscopy. The mapping of primary events in photochemistry and photocatalysis.- Concluding remarks on: Homogeneous photocatalysis.- Fundamental aspects of the adsorption and the desorption of gases at solid surfaces under illumination.- Adsorption of energy in photocatalytic reactors.- Photocatalytic reactions.- Heterogeneous photocatalysis.- Some experimental investigations of photosorption phenomena at the gas-solid interface.- Photocatalytic reactions: an overview on the water splitting and on the dinitrogen reduction.- Concluding remarks on: Heterogeneous photocatalysis at the gas/solid interface.- to the modelling and design of photoreactors.- Radiative transfer in photochemical processes.- Studies of photoreactions in homogeneous photoreactors.- Studies of photoreactions in heterogeneous photoreactors.- Absorption of light energy in photoreactors.- Current problems in the modelling of photochemical reactors.- Guidelines for photoreactor research.

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