@inproceedings{ee15352ac3104583a96d30c5de535df5,
title = "Fabrication of optical gap selective amorphous carbon photocatalyst for hydrogen production under irradiation with visible light",
abstract = "Si-added amorphous carbon (a-C) nanoparticles with particle diameter of 12.6 nm were synthesized using radio frequency (r.f.) plasma-enhanced chemical vapor deposition method equipped with porous aluminum plate in plasma. The optical gap of Si-added a-C particles with Si/(Si + C) ratio of 0.51 was 1.92 eV. Band edges of this nanoparticles was estimated to be as follows: i) conduction band edge was located over the standard potential of H+/H2 and ii) valence band edge was located under the standard potential of O2/H2O. From X-ray photoemission spectra, it was clarified that the part of tri-s-triazine structure with higher adsorption property toward water was introduced into nanoparticle with optical gap of 1.92 eV by adding graphitic-carbon nitride (g-C3N4) in a source material. The photo-oxidation measurement of indigo carmine adsorbed on Si-added a-C nanoparticles with tri-s-triazine structure was carried out. As a result, indigo carmine was decomposed at a rate of 0.0197 μmol/h. under UV irradiation. This result indicates that Si-added a-C nanoparticle can be applied to photocatalyst for reduction of water (estimated quantum efficiency of 0.049 %). It was experimentally demonstrated that the proposed Si-added a-C nanoparticles are tailor-made photocatalyst material that enables us to adjust band edge and surface functionalities for photo-oxidation (reduction) reactant.",
author = "Keigo Okafuji and Ryutaro Kobayashi and Shinpei Ohtomo and Hiroshi Naragino and Kensuke Honda",
note = "Publisher Copyright: {\textcopyright} The Electrochemical Society.; Symposium on Photocatalysts, Photoelectrochemical Cells, and Solar Fuels 7 - PRiME 2016/230th ECS Meeting ; Conference date: 02-10-2016 Through 07-10-2016",
year = "2016",
doi = "10.1149/07550.0057ecst",
language = "English",
series = "ECS Transactions",
publisher = "Electrochemical Society Inc.",
number = "50",
pages = "57--74",
editor = "N. Wu and D. Chu and Kulesza, {P. J.} and Nam, {K. T.} and H. Park and Subramanian, {V. R.} and H. Wang and J.-J. Lee and Soriaga, {M. P.} and N. Batina and T. Tatsuma and B. Ohtani and A. Kudo",
booktitle = "Photocatalysts, Photoelectrochemical Cells, and Solar Fuels 7",
edition = "50",
}
