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Self-adhesive graphene oxide-wrapped TiO2 nanoparticles for UV-activated colorimetric oxygen detection
- Authors
- Son, Eun Jin; Lee, Joon Seok; Lee, Minah; Chau Hai Thai Vu; Lee, Hana; Won, Keehoon; Park, Chan Beum
- Issue Date
- Jul-2015
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Colorimetric oxygen sensing; Graphene oxide; TiO2 nanoparticles; Methylene blue; UV activation
- Citation
- SENSORS AND ACTUATORS B-CHEMICAL, v.213, pp 322 - 328
- Pages
- 7
- Indexed
- SCI
SCIE
SCOPUS
- Journal Title
- SENSORS AND ACTUATORS B-CHEMICAL
- Volume
- 213
- Start Page
- 322
- End Page
- 328
- ISSN
- 0925-4005
0925-4005
- Abstract
- We first report on the synthesis of graphene oxide-wrapped TiO2 nanoparticles (GO-TiO2 NPs) as a self-adhesive photocatalyst for UV-activated colorimetric oxygen detection. Methylene blue (MB), a redox dye for colorimetric oxygen indication, strongly adsorbed onto GO-TiO2 NPs by both electrostatic and pi-pi stacking interactions. The chemical attraction between GO and MB significantly decreased dye leakage, which is a serious problem of colorimetric oxygen indicators; MB leaching from GO-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 regained its blue color rapidly in the presence of oxygen, demonstrating its useful functionality as a UV-activated colorimetric oxygen indicator. (C) 2015 Elsevier B.V. All rights reserved.
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Related Researcher
- Won, Kee Hoon
- College of Engineering (Department of Chemical and Biochemical Engineering)