In situ high-resolution transmission electron microscopy of photocatalytic reactions by excited electrons in ionic liquid

A transmission electron microscope (TEM) sample for observing photocatalysis in a liquid was prepared by using N,N,N-trimetyl-N-propylammonium-bis(trifluoromethanesulfonyl)imide. The ionic liquid (IL) was used as a reaction solvent. Tetrachloroauric acid was dissolved in the IL as gold ion species....

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Bibliographic Details
Published inJournal of electron microscopy Vol. 56; no. 5; p. 177
Main Authors Yoshida, Kenta, Nozaki, Tsutomu, Hirayama, Tsukasa, Tanaka, Nobuo
Format Journal Article
LanguageEnglish
Published Japan 01.10.2007
Subjects
Catalysis
Gold - chemistry
Ionic Liquids - chemistry
Microscopy, Electron, Transmission - methods
Photochemistry
Ultraviolet Rays
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Summary:A transmission electron microscope (TEM) sample for observing photocatalysis in a liquid was prepared by using N,N,N-trimetyl-N-propylammonium-bis(trifluoromethanesulfonyl)imide. The ionic liquid (IL) was used as a reaction solvent. Tetrachloroauric acid was dissolved in the IL as gold ion species. Rutile particles were added in the solution as a photocatalyst. The low vapor pressure of the IL enables a diffusing system in high vacuum of TEM. Rutile particles were UV irradiated in that liquid phase. After 3 h UV irradiation, a gold particle of 8 nm diameter was grown on the TiO2 surface. Photonucleation of Au/TiO2 system was discussed from the high-resolution TEM images.
ISSN:1477-9986
DOI:10.1093/jmicro/dfm021