TiO/sub 2/ and CdS colloids stabilized by. beta. -cyclodextrins: tailored semiconductor-receptor systems as a means to control interfacial electron-transfer processes

Journal Article · Wed Oct 28 04:00:00 EST 1987 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja00256a056· OSTI ID:5418943

Willner, I; Eichen, Y

The photocatalytic activity of semiconductor particles is of substantial interest in synthesis as well as a means of solar energy conversion and storage. Electron-transfer reactions such as charge ejection or charge injection at semiconductor - solution interfaces are important factors that control the photocatalytic activity of the semiconductors. Electrostatic attraction of solute to the semiconductor surface has improved charge ejection from the excited semiconductor to solute relays. Adsorption of dyes to the semiconductor surface, i.e., by hydrophobic interactions, resulted in effective charge injection to the semiconductor and consequently the photocatalytic activity of semiconductors operative in the UV region could be shifted to the visible absorption spectrum. Substantial efforts have also been directed in recent years toward the preparation of semiconductor particles in colloidal forms to improve their light harvesting and interfacial electron-transfer properties. Stabilization of semiconductor colloids by polymers, microemulsions, and vesicle encapsulation has been reported. Here they report on a novel method for stabilizing semiconductor colloids by ..beta..-cyclodextrin (..beta..-CD).

• Research Organization: Hebrew Univ. of Jerusalem, Israel
• OSTI ID: 5418943
• Journal Information: J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 109:22; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140505 -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
CADMIUM COMPOUNDS
CADMIUM SULFIDES
CARBOHYDRATES
CHALCOGENIDES
CHEMISTRY
COLLOIDS
DATA
DEXTRIN
DISPERSIONS
ELECTRON TRANSFER
EXPERIMENTAL DATA
INFORMATION
INORGANIC PHOSPHORS
MATERIALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOSPHORS
PHOTOCHEMISTRY
POLYSACCHARIDES
SACCHARIDES
SEMICONDUCTOR MATERIALS
STABILITY
SULFIDES
SULFUR COMPOUNDS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS