Synergetic effect in water treatment with mesoporous TiO2/BDD hybrid electrode

Norihiro Suzuki; Akihiro Okazaki; Haruo Kuriyama; Izumi Serizawa; Yuki Hirami; Aiga Hara; Yuiri Hirano; Yukihiro Nakabayashi; Nitish Roy; Chiaki Terashima; Kazuya Nakata; Ken-Ichi Katsumata; Takeshi Kondo; Makoto Yuasa; Akira Fujishima

doi:10.1039/c9ra10318j

Synergetic effect in water treatment with mesoporous TiO₂/BDD hybrid electrode

RSC Adv. 2020 Jan 8;10(3):1793-1798. doi: 10.1039/c9ra10318j. eCollection 2020 Jan 7.

Authors

Norihiro Suzuki¹, Akihiro Okazaki², Haruo Kuriyama², Izumi Serizawa², Yuki Hirami³, Aiga Hara³, Yuiri Hirano³, Yukihiro Nakabayashi^{1

4}, Nitish Roy^{1

5}, Chiaki Terashima¹, Kazuya Nakata^{1

3

6}, Ken-Ichi Katsumata^{1

7}, Takeshi Kondo³, Makoto Yuasa³, Akira Fujishima¹

Affiliations

¹ Photocatalysis International Research Center, Research Institute for Science and Technology, Tokyo University of Science 2641 Yamazaki Noda Chiba 278-8510 Japan suzuki.norihiro@rs.tsu.ac.jp.
² ORC Manufacturing Co., Ltd 4896 Tamagawa Chino Nagano 391-0011 Japan.
³ Faculty of Science and Technology, Tokyo University of Science 2641 Yamazaki Noda Chiba 278-8510 Japan.
⁴ Faculty and Graduate School of Urban Environmental Sciences, Department of Applied Chemistry for Environment, Tokyo Metropolitan University 1-1 Minami-Osawa Hachioji Tokyo 192-0397 Japan.
⁵ Department of Chemistry, University of North Bengal Raja Rammohunpur Darjeeling West Bengal-734013 India.
⁶ Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology 2-24-16 Nakacho Koganei Tokyo 184-0012 Japan.
⁷ Faculty of Industrial Science and Technology, Tokyo University of Science 6-3-1 Niijyuku, Katsushika Tokyo 125-8585 Japan.

Abstract

Boron-doped diamond (BDD) electrodes have a wide potential window and can produce ozone by water electrolysis at high voltage. Though ozone has strong oxidative power (standard oxidation potential: 2.07 V vs. NHE), it cannot decompose certain types of recalcitrant organic matter completely. We developed an advanced oxidation process (AOP), in which hydroxy radicals with stronger oxidative power (standard oxidation potential: 2.85 V vs. NHE) are formed using a combination of ozone, photocatalyst, and UV. In this study, we fabricated a mesoporous TiO₂/BDD hybrid electrode and examined its potential for AOPs. A synergetic effect between electrochemical water treatment and photocatalytic water treatment was observed with the hybrid electrode that did not occur with the BDD electrode.