Development of new photocatalysis technology using carbon nanotube colored with organic dyes

March 22(Thu), 2018

The collaborative research group of Yutaka Takaguchi, Associate Professor, Tomoyuki Tajima, Instructor, Noritake Murakami, a graduate student at the Graduate School of Environmental and Life Science of Okayama University (Environment), Hideaki Miyake, Assistant Professor and other members at the Graduate School of Sciences and Technology for Innovation of Yamaguchi University, confirmed for the first time that encapsulating dye molecules in carbon nanotubes enables hydrogen production through dye-sensitized water splitting reactions under light irradiation. Hydrogen production activities through water splitting reaction under the red light (wavelength of 650 nm) irradiations which is hard to use in ordinary photocatalyst [1], were examined. The quantum yield (1.4%) at the dyed carbon nanotube catalyst was 120 times more active than the quantum yield (0.011%) of the carbon nanotube catalyst which had no dye molecules. This research result was published in the U.S. chemical magazine “Journal of American Chemical Society” on March 5, 2018.
This research shows that the wavelength of the carbon nanotube catalyst can be controlled by coloring carbon nanotubes with organic dyes. This method of controlling active wavelength without any past examples could be the key technology to the CO2-free hydrogen production through water splitting (artificial photosynthesis) and is expected to contribute to achieving the “SDGs (Sustainable Development Goals)” by the United Nations, which our university is working toward.

Article Information


Authors: Noritake Murakami, Hideaki Miyake, Tomoyuki Tajima, Kakeru Nishikawa, Ryutaro Hirayama, and Yutaka Takaguchi

Journal: Journal of American Chemical Society

Title: Enhanced Photosensitized Hydrogen Production by Encapsulation of Ferrocenyl Dyes into Single-Walled Carbon Nanotubes

Year of Publication: March 5, 2018

Okayama University Silicon Valley Office (OUSVO)

Contact: Mototaka Senda, Ph.D.

Phone:    (1)510-894-3067


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