Iron Oxide Nano-Particle Based Photochromic Composite Films

Iron oxide (α-Fe2O3 and α-FeOOH)-based composite films were fabricated using an FeCl3·6H2O ethanol solution and transparent urethane resin. Iron oxide particles 50–90 nm in diameter were observed in the resulting composite films; analyses by Fourier transform infrared (FT-IR) spectroscopy and transm...

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Bibliographic Details
Published inBulletin of the Chemical Society of Japan Vol. 93; no. 2; pp. 216 - 219
Main Authors Miyazaki, Hidetoshi, Yoshida, Yusuke
Format Journal Article
LanguageEnglish
Published Tokyo The Chemical Society of Japan 15.02.2020
Chemical Society of Japan
Subjects
Chemical industry
Energy gap
Ethanol
Ferric chloride
Fourier transforms
Infrared analysis
Infrared spectroscopy
Iron chlorides
Iron oxides
Irradiation
Joint ventures
Photochromism
Ultraviolet radiation
Composite film
Photochromism
Iron oxide
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Summary:Iron oxide (α-Fe2O3 and α-FeOOH)-based composite films were fabricated using an FeCl3·6H2O ethanol solution and transparent urethane resin. Iron oxide particles 50–90 nm in diameter were observed in the resulting composite films; analyses by Fourier transform infrared (FT-IR) spectroscopy and transmission electron microscopy confirmed the presence of iron oxide particles in the films. The films were initially yellowish-brown and turned greenish-gray upon UV irradiation. After UV irradiation of the films, their bandgap decreased (Bürstein–Moss effect). When the composite films (after UV irradiation) were placed in a dark room, their color and bandgap were restored to their initial states. Thus, the iron oxide-based composite films exhibited reversible photochromism.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:0009-2673
1348-0634
DOI:10.1246/bcsj.20190300