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An investigation of the stirring duration effect on synthesized graphene oxide for dye-sensitized solar cells

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dc.citedby4
dc.contributor.authorYau X.H.en_US
dc.contributor.authorLow F.W.en_US
dc.contributor.authorKhe C.S.en_US
dc.contributor.authorLai C.W.en_US
dc.contributor.authorTiong S.en_US
dc.contributor.authorAmin N.en_US
dc.contributor.authorid57194285494en_US
dc.contributor.authorid56513524700en_US
dc.contributor.authorid55332159700en_US
dc.contributor.authorid54879860000en_US
dc.contributor.authorid15128307800en_US
dc.contributor.authorid7102424614en_US
dc.date.accessioned2023-05-29T08:11:17Z
dc.date.available2023-05-29T08:11:17Z
dc.date.issued2020
dc.descriptiongraphene oxide; nanocomposite; oxygen; titanium dioxide nanoparticle; coloring agent; graphene oxide; graphite; absorption parameters; Article; electron transport; energy dispersive X ray spectroscopy; field emission scanning electron microscopy; Fourier transform infrared spectroscopy; Hummer method; impedance spectroscopy; oxidation; Raman spectrometry; reduction (chemistry); synthesis; time; X ray diffraction; chemistry; power supply; solar energy; Coloring Agents; Electric Power Supplies; Graphite; Solar Energyen_US
dc.description.abstractThis study investigates the effects of stirring duration on the synthesis of graphene oxide (GO) using an improved Hummers� method. Various samples are examined under different stirring durations (20, 40, 60, 72, and 80 h). The synthesized GO samples are evaluated through X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR), and Raman spectroscopy. The GO sample with 72 h stirring duration (GO72) has the highest d-spacing in the XRD results, highest atomic percentage of oxygen in EDX (49.57%), highest intensity of oxygen functional group in FTIR spectra, and highest intensity ratio in Raman analysis (ID/IG = 0.756). Results show that GO72 with continuous stirring has the highest degree of oxidation among other samples. Electrochemical impedance spectroscopy analysis shows that GO72�titanium dioxide (TiO2) exhibits smaller charge transfer resistance and higher electron lifetime compared with the TiO2-based photoanode. The GO72 sample incorporating TiO2 nanocomposites achieves 6.25% photoconversion efficiency, indicating an increase of more than twice than that of the mesoporous TiO2 sample. This condition is fully attributed to the efficient absorption rate of nanocomposites and the reduction of the recombination rate of TiO2 by GO in dye-sensitized solar cells. � 2020 Yau et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.en_US
dc.description.natureFinalen_US
dc.identifier.ArtNoe0228322
dc.identifier.doi10.1371/journal.pone.0228322
dc.identifier.issue2
dc.identifier.scopus2-s2.0-85078896323
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85078896323&doi=10.1371%2fjournal.pone.0228322&partnerID=40&md5=d018c7182dc6b834da266e3caf7c82d0
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/25585
dc.identifier.volume15
dc.publisherPublic Library of Scienceen_US
dc.relation.ispartofAll Open Access, Gold, Green
dc.sourceScopus
dc.sourcetitlePLoS ONE
dc.titleAn investigation of the stirring duration effect on synthesized graphene oxide for dye-sensitized solar cellsen_US
dc.typeArticleen_US
dspace.entity.typePublication
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