Effect of Annealing on the Photocatalytic and Photoelectrochemical Properties for TaON Oxynitride Prepared by (C6N9H3)n
Koichiro Ueda a, Yoshiyuki Inaguma a, Yusuke Asakura b, Shu Yin b, Ken-ichi Katsumata c
a Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
b Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
c Tokyo University of Science, Japan, Tokyo, Japan
d Tokyo University of Science, Japan, Tokyo, Japan
nanoGe Fall Meeting
Proceedings of nanoGe Fall Meeting19 (NGFM19)
#SolFuel19. Solar Fuel Synthesis: From Bio-inspired Catalysis to Devices
Berlin, Germany, 2019 November 3rd - 8th
Organizers: Roel van de Krol and Erwin Reisner
Poster, Koichiro Ueda, 406
Publication date: 18th July 2019

Hydrogen production using photocatalytic materials is attracting attention as a clean fuel production method. TaON is one of the famous photocatalysts that are able to decompose water into H2and O2 under visible light irradiation without any sacrificial reagent[1, 2]. Last year we reported on a new synthesis and photoelectrochemical properties of TaON using (C6N9H3)n, melon, as a solid nitrogen source[3]. In this study, we investigated the effect of annealing on the photocatalytic and photoelectrochemical properties of TaON prepared by our method. TaON powder was prepared from Ta2Opowder by heating with melon in quartz glass tube at 1123 K for 3 hours. Prepared TaON powder was annealed at 773 K to remove some organic species present on the surface. TaON/Ta/Ti photoanodes were prepared by a particle transfer method[4]. using Ta and Ti as contact and conductor layers, respectively. CoOx-modified[5, 6]TaON/Ta/Ti photoelectrodes produced a photocurrent of 0.6 mA・cm-2 at 1.23 VRHE under simulated sunlight irradiation. The annealed TaON powder showed photocatalytic activity of Ogeneration reaction from AgNOsolution under visible light irradiation, whereas unannealed TaON had no photocatalytic activity.

We thank Prof. Kazunari Domen of the University of Tokyo permitting for use of facilities. This study was partly supported by the Joint Usage/Research Program of “the Photocatalysis International Research Center”, Research Institute for Science and Technology, Tokyo University of Science. This work was supported by a Japan Society for Scientific Research on the Innovative Area “Mixed anion” (no. JP16H06439), and for the Strategic Research Foundation at Private Universities, 2015­ 2019, supported by the Minister of Education, Culture, Sports, Science and Technology (MEXT), Japan. 

© Fundació Scito
We use our own and third party cookies for analysing and measuring usage of our website to improve our services. If you continue browsing, we consider accepting its use. You can check our Cookies Policy in which you will also find how to configure your web browser for the use of cookies. More info