Rod-Shaped β-FeOOH Synthesis for Hydrogen Production under Light Irradiation

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 beta-phase iron oxyhydroxide (beta-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 beta-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 beta-FeOOH. The synthesized beta-FeOOH was subjected to UV irradiation for 24 h to produce hydrogen, and we confirmed that hydrogen was successfully produced. The properties of beta-FeOOH were evaluated after UV irradiation.

Automated summary

In this study, beta-phase iron oxyhydroxide (beta-FeOOH) was synthesized using a hydrothermal method, and its photofunctional properties were investigated. Hydrogen production was successfully achieved by irradiating ultraviolet light on beta-FeOOH.