3D TiO2 modified with reduced graphene embed into polyvinyl alcohol: photoanode electrode for oxygen evolution reaction

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dc.contributor.authorTezcan, Fatih
dc.contributor.authorDemir, Didem
dc.date.accessioned2025-03-17T12:18:42Z
dc.date.available2025-03-17T12:18:42Z
dc.date.issued2023
dc.departmentTarsus Üniversitesi
dc.description.abstractThe photocatalytic hydrogen production from water splitting using solar energy is one of the promising trend research topics within the scope of green energy production. A photoelectrochemical set up consists of photoelectrode materials that directly uses photon energy convers water to hydrogen and oxygen. The photoelectrodes are photoanode and photocathode materials n-type and p-type semiconductor, respectively. In this study, the 3D TiO2 photoanode surface was modified by coating it with reduced graphene (rG) added polyvinyl alcohol (PVA) gel. PVA synthetic polymer with thermal stability, mechanical stability and low cost was preferred to provide distribution of rG material on 3D TiO2 active surfaces. In this context, different amounts of rG (2.5, 5, 10 and 20%, based on polymer weight) impregnated with PVA gel coated on the 3D TiO2 semiconductor surface were investigated. The solar light absorption behaviour and molecular interactions of the different amounts of rG in PVA on 3D TiO2 semiconductor were monitored by UV-vis and Raman spectrometer. A photocatalytic performance of photoelectrodes were conducted by Electrochemical Impedance spectroscopy (EIS), linear sweep voltammetry (LSV) and chronoamperometric measurement under 100 mW cm-2 solar light. Raman spectrum showed dispersion of RG in PVA. EIS measurement showed that the polarization resistance (Rp) increased in 3D TiO2 with only PVA coating, while the addition of rG to PVA caused a decrease in Rp at the semiconductor/electrolyte interface under sunlight. Furthermore, LSV and chronoamperometric measurement concluded that the increased amount of rG added to PVA increased the photoresponse of 3D TiO2 up to the limit rG value.
dc.identifier.doi10.32571/ijct.1247384
dc.identifier.endpage196
dc.identifier.issn2602-277X
dc.identifier.issue2
dc.identifier.startpage189
dc.identifier.trdizinid1227415
dc.identifier.urihttps://doi.org/10.32571/ijct.1247384
dc.identifier.urihttps://search.trdizin.gov.tr/tr/yayin/detay/1227415
dc.identifier.urihttps://hdl.handle.net/20.500.13099/945
dc.identifier.volume7
dc.indekslendigikaynakTR-Dizin
dc.language.isoen
dc.relation.ispartofInternational Journal of Chemistry and Technology (IJCT)
dc.relation.publicationcategoryMakale - Ulusal Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_TR_20250316
dc.subjectPolyvinyl alcohol
dc.subjectPhotoanode
dc.subjectwater splitting
dc.subjectoxygen evolution reaction
dc.subjectreduced graphene
dc.title3D TiO2 modified with reduced graphene embed into polyvinyl alcohol: photoanode electrode for oxygen evolution reaction
dc.typeArticle

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