Self-adhesive graphene oxide-wrapped TiO2 nanoparticles for UV-activated colorimetric oxygen detection

Title
Self-adhesive graphene oxide-wrapped TiO2 nanoparticles for UV-activated colorimetric oxygen detection
Authors
이준석손은진이민아Chau Hai Thai Vu이하나권기훈박찬범
Issue Date
2015-07
Publisher
Sensors and actuators. B, Chemical
Citation
VOL 213-328
Abstract
We first report on the synthesis of graphene oxide-wrapped TiO2nanoparticles (GO-TiO2NPs) asa self-adhesive photocatalyst for UV-activated colorimetric oxygen detection. Methylene blue (MB),a redox dye for colorimetric oxygen indication, strongly adsorbed onto GO-TiO2NPs by both elec-trostatic and – stacking interactions. The chemical attraction between GO and MB significantlydecreased dye leakage, which is a serious problem of colorimetric oxygen indicators; MB leaching fromGO-TiO2-based film was fivefold lower than that from conventional TiO2-based film. This novel MB/GO-TiO2/glycerol/hydroxyethyl cellulose film was successfully bleached by UV irradiation, and it regainedits blue color rapidly in the presence of oxygen, demonstrating its useful functionality as a UV-activatedcolorimetric oxygen indicator.
URI
http://pubs.kist.re.kr/handle/201004/70327
ISSN
0925-4005
Appears in Collections:
KIST Publication > Article
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