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Novel gamma-ray enhanced TiO2 nanoparticles photoanode for efficient photoelectrochemical (PEC) water splitting

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dc.citedby13
dc.contributor.authorAida Mohamed N.en_US
dc.contributor.authorSieh Kiong T.en_US
dc.contributor.authorFazli Ismail A.en_US
dc.contributor.authorAsri Mat Teridi M.en_US
dc.contributor.authorid57201821340en_US
dc.contributor.authorid15128307800en_US
dc.contributor.authorid29067828200en_US
dc.contributor.authorid57189470988en_US
dc.date.accessioned2025-03-03T07:48:24Z
dc.date.available2025-03-03T07:48:24Z
dc.date.issued2024
dc.description.abstractThe photocatalytic activity of TiO2 nanoparticles (TiO2NPs) for Hydrogen Evolution Reduction (HER) was significantly enhanced through a multi-step process involving oxygen-doping with ?-ray irradiation treatment (ranging from 10 kGy to 100 kGy), methanolic dispersion, and post-annealing temperatures. Remarkably, ? rays induced oxygen-doping, leading to improved electronic properties and chemical bonding, as demonstrated in the XPS section, which ultimately contributed to the exceptional stability of the photoanode. The resulting higher crystallinity and larger crystallite sizes, evident in Raman and XRD spectra, further enhanced the structure of the TiO2NPs. Upon ? irradiation, the deposited TiO2NPs exhibited enlargement and agglomeration, which promoted enhanced surface area, catalytic sites, and light absorption when used as a photoanode in PEC cells. The post-irradiation conditions caused a reduction in the energy band gap, resulting in a quenching effect from 3.25 eV to 3.18 eV. Intriguingly, PL analysis showed that the radiated photoanode displayed a remarkable reduction in the energetic separation of photo-generated electron-hole pairs, accompanied by a simultaneous decrease in carrier recombination. Overall, the 70 kGy TiO2NP photoanode demonstrated exceptional photostability and significantly outperformed the pure TiO2NP counterpart by increasing the photocurrent density by over 300%, reaching approximately 100.12 ?A cm?2 at 1.23 vs. RHE, compared to 36.42 ?A cm?2 for the pure TiO2NP. These findings underscore the significance of gamma irradiation in the field of nanomaterials and its promising potential for photoelectrochemical (PEC) solar water splitting applications. ? 2023 Elsevier B.V.en_US
dc.description.natureFinalen_US
dc.identifier.ArtNo158602
dc.identifier.doi10.1016/j.apsusc.2023.158602
dc.identifier.scopus2-s2.0-85173239436
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85173239436&doi=10.1016%2fj.apsusc.2023.158602&partnerID=40&md5=5f0c8875a03d5782b0431cb569435bc6
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/37186
dc.identifier.volume642
dc.publisherElsevier B.V.en_US
dc.sourceScopus
dc.sourcetitleApplied Surface Science
dc.subjectAnnealing
dc.subjectChemical bonds
dc.subjectChemical stability
dc.subjectCrystallinity
dc.subjectElectronic properties
dc.subjectEnergy gap
dc.subjectGamma rays
dc.subjectLight absorption
dc.subjectOxygen
dc.subjectPhotocatalytic activity
dc.subjectPhotoelectrochemical cells
dc.subjectTiO2 nanoparticles
dc.subjectTitanium dioxide
dc.subject% reductions
dc.subjectEnergy
dc.subjectGamma-rays
dc.subjectOxygen doping
dc.subjectPhoto-anodes
dc.subjectPhotoelectrochemical
dc.subjectPhotoelectrochemicals
dc.subjectTiO 2
dc.subjectTiO2 nanoparticle
dc.subject� ray irradiation
dc.subjectIrradiation
dc.titleNovel gamma-ray enhanced TiO2 nanoparticles photoanode for efficient photoelectrochemical (PEC) water splittingen_US
dc.typeArticleen_US
dspace.entity.typePublication
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