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Laser induced photocatalytic generation of hydrogen and oxygen over NiO and TiO2

Authors :
Mohammed A. Gondal
Abdul Hameed
Source :
Journal of Molecular Catalysis A: Chemical. 219:109-119
Publication Year :
2004
Publisher :
Elsevier BV, 2004.

Abstract

A comparative study of photocatalytic splitting of water into hydrogen and oxygen over NiO and TiO 2 was carried out using 355 nm laser radiations as a light source. The effect of dissolved metal ions on photocatalytic splitting of water over these catalysts was also studied by using Fe 3+ , Ag + and Li + ions to enhance the efficiency of the process by suppressing the non-productive electron–hole recombination. The dependence of products yield on incident laser energy, amount of catalyst (particle density), stirring rate and laser beam diameter was also investigated for activity comparison of these catalysts. It was demonstrated for the first time that by using a high photon flux source such as laser, the problems of longer exposure time and low photonic efficiencies could be resolved which is common problem with conventional UV lamp based photocatalysis.

Details

ISSN :
13811169
Volume :
219
Database :
OpenAIRE
Journal :
Journal of Molecular Catalysis A: Chemical
Accession number :
edsair.doi...........3de376e9e73f2cf75ff74f63248454f7
Full Text :
https://doi.org/10.1016/j.molcata.2004.04.042