Open AccessRod-Shaped β-FeOOH Synthesis for Hydrogen Production under Light Irradiation
Author(s) -
Younghwa Yoon,
Ken Ichi Katsumata,
Norihiro Suzuki,
Kensei Nakata,
Chiaki Terashima,
Kyung Hwan Kim,
Akira Fujishima,
Jeongsoo Hong
Publication year - 2021
Publication title -
acs omega
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.779
H-Index - 40
ISSN - 2470-1343
DOI - 10.1021/acsomega.1c04251
Subject(s) - hydrogen , hydrogen production , irradiation , materials science , hydrothermal circulation , scanning electron microscope , ultraviolet , band gap , impurity , chemical engineering , photocatalysis , catalysis , chemistry , optoelectronics , composite material , organic chemistry , physics , nuclear physics , engineering
Renewable energy is spotlighted as a resource to replace fossil fuels, and among the resources, active research on hydrogen energy is ongoing. Various methods have been developed to produce hydrogen energy using photoreduction processes. In this study, we synthesized β-phase iron oxyhydroxide (β-FeOOH) using a hydrothermal method with an optimal synthesis time and investigated its photofunctional properties, including hydrogen production. The obtained samples were characterized and compared with reference data. X-ray powder diffraction results corresponded to the peaks of the reference data. A rod structure was confirmed by scanning electron microscopy, and no impurities were observed. The band-gap energy of β-FeOOH was calculated as 1.8-2.6 eV. A photoreduction process was performed based on a photo-Fenton reaction to produce hydrogen by irradiating ultraviolet (UV) on β-FeOOH. The synthesized β-FeOOH was subjected to UV irradiation for 24 h to produce hydrogen, and we confirmed that hydrogen was successfully produced. The properties of β-FeOOH were evaluated after UV irradiation.