Semiconductor photocatalysis. Quantitative photoreduction of aliphatic ketones to alcohols using defect-free ZnS quantum crystallites

Journal Article · Thu Apr 05 04:00:00 EDT 1990 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100370a066· OSTI ID:6637821

Yanagida, Shozo; Yoshiya, Masahisa; Shiragami, Tsutomu; Pac, Chyongjin; Mori, Hirotaro; Fujita, Hiroshi ^[1]

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1. Osaka Univ. (Japan)

Quantized ZnS microcrystallites (2-5 nm) and their aggregates, which were vividly confirmed by a high-resolution electron microscope, catalyze photoredox reactions of an aqueous mixture of 2-butanone, Na{sub 2}S, and Na{sub 2}SO{sub 3} under >313-nm light irradiation; the ketone is quantitatively photoreduced to 2-butanol without much H{sub 2}, and S{sup 2{minus}} and SO{sub 3}{sup 2{minus}} ions are photooxidized to S{sub 2}O{sub 3}{sup 2{minus}} ion. The synergistic effect of S{sup 2{minus}} and SO{sub 3}{sup 2{minus}} ions and quantum size effect on the photocatalytic system are discussed in terms of spectral properties, and the selective and highly efficient photoredox reactions of this system are attributed to suppression of the formation of the localized surface states, which cause competitive water photoreduction to H{sub 2} or deactivation of the catalysts.

• OSTI ID: 6637821
• Journal Information: Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 94:7; ISSN 0022-3654; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
CATALYSIS
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
DATA ANALYSIS
EXPERIMENTAL DATA
INFORMATION
INORGANIC PHOSPHORS
MATERIALS
MEASURING INSTRUMENTS
MEASURING METHODS
NUMERICAL DATA
PHOSPHORS
PHOTOCHEMICAL REACTIONS
REDOX REACTIONS
SEMICONDUCTOR MATERIALS
SULFIDES
SULFUR COMPOUNDS
ZINC COMPOUNDS
ZINC SULFIDES