Light-assisted synthesis of Au/TiO<inf>2</inf> nanoparticles for H<inf>2</inf> production by photocatalytic water splitting
Issued Date
2022-07-01
Resource Type
ISSN
03603199
Scopus ID
2-s2.0-85132372582
Journal Title
International Journal of Hydrogen Energy
Volume
47
Issue
56
Start Page
23570
End Page
23582
Rights Holder(s)
SCOPUS
Bibliographic Citation
International Journal of Hydrogen Energy Vol.47 No.56 (2022) , 23570-23582
Suggested Citation
Kunthakudee N., Puangpetch T., Ramakul P., Serivalsatit K., Hunsom M. Light-assisted synthesis of Au/TiO<inf>2</inf> nanoparticles for H<inf>2</inf> production by photocatalytic water splitting. International Journal of Hydrogen Energy Vol.47 No.56 (2022) , 23570-23582. 23582. doi:10.1016/j.ijhydene.2022.05.150 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/84553
Title
Light-assisted synthesis of Au/TiO<inf>2</inf> nanoparticles for H<inf>2</inf> production by photocatalytic water splitting
Other Contributor(s)
Abstract
A series of Au/TiO2 photocatalysts was synthesized via the light assistance through the photo-deposition for H2 production by photocatalytic water splitting using ethanol as the hole scavenger. Effect of solution pH in the range of 3.2–10.0 on the morphology and photocatalytic activity for H2 production of the obtained Au/TiO2 photocatalysts was explored. It was found that all Au/TiO2 photocatalysts prepared in different solution pH exhibited comparable anatase fraction (∼0.84–0.85) and crystallite size of TiO2 (21–22 nm), but showed different quantity of deposited Au nanoparticles (NPs) and other properties, particularly the particle size of the Au NPs. Among all prepared Au/TiO2 photocatalysts, the Au/TiO2 (10.0) photocatalyst exhibited the highest photocatalytic activity for H2 production, owning to its high metallic state and small size of Au NPs. Via this photocatalyst, the maximum H2 production of 296 μmol (∼360 μmol/g⋅h) was gained at 240 min using the 30 vol% ethanol as the hole scavenger at the photocatalyst loading of 1.33 g/L under the UV light intensity of 0.24 mW/cm2 with the quantum efficiency of 61.2% at 254 nm. The loss of the photocatalytic activity of around 20% was observed after the 5th use.