Semiconductor photocatalysis. Effective photoreduction of carbon dioxide catalyzed by ZnS quantum crystallites with low density of surface defects

ZnS quantum crystallites effectively catalyze CO{sub 2} photoreduction in water with NaH{sub 2}PO{sub 2} and coexisting Na{sub 2}S under UV irradiation. H{sub 2}, formate, and CO were formed, and H{sub 2}PO{sub 2}{sup -} was photoxidized to HPO{sub 3}{sup 2-}. This efficiency depends on system pH, s...

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Veröffentlicht in:	Journal of Physical Chemistry 1992-04, Vol.96 (8), p.3521-3526
Hauptverfasser:	KANEMOTO, M, SHIRAGAMI, T, PAC, C, YANAGIDA, S
Format:	Artikel
Sprache:	eng
Schlagworte:	40 CHEMISTRY CARBON DIOXIDE CATALYSIS Chemistry CRYSTAL DEFECTS Exact sciences and technology General and physical chemistry MATERIALS SCIENCE PHOTOCHEMICAL REACTIONS Photochemistry Physical chemistry of induced reactions (with radiations, particles and ultrasonics) PHYSICS SEMICONDUCTOR MATERIALS ZINC SULFIDES
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Zusammenfassung:	ZnS quantum crystallites effectively catalyze CO{sub 2} photoreduction in water with NaH{sub 2}PO{sub 2} and coexisting Na{sub 2}S under UV irradiation. H{sub 2}, formate, and CO were formed, and H{sub 2}PO{sub 2}{sup -} was photoxidized to HPO{sub 3}{sup 2-}. This efficiency depends on system pH, synergistic effects of electron donors, and preparation methods of ZnS photocatalysts. 26 refs., 10 figs., 3 tabs.
ISSN:	0022-3654 1541-5740
DOI:	10.1021/j100187a062