The investigation of CdS-quantum-dot-sensitized Ag-deposited TiO2 NRAs in photoelectrochemical hydrogen production

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dc.authoridRehman, Zia Ur/0000-0002-1436-3131
dc.authoridtezcan, fatih/0000-0001-7656-3529
dc.authoridKardas, Gulfeza/0000-0002-7871-6303
dc.contributor.authorTezcan, Fatih
dc.contributor.authorAhmad, Abrar
dc.contributor.authorYerlikaya, Gurbet
dc.contributor.authorZia-ur-Rehman
dc.contributor.authorPaksoy, Halime
dc.contributor.authorKardas, Gulfeza
dc.date.accessioned2025-03-17T12:25:51Z
dc.date.available2025-03-17T12:25:51Z
dc.date.issued2022
dc.departmentTarsus Üniversitesi
dc.description.abstractPhotoelectrochemical hydrogen production using photoelectrodes with sophisticated hierarchical architecture designs combined with effective photoactive materials, has been found to be an impressive route for achieving high photoelectrocatalytic efficiency. Here, we investigated the photoelectrocatalytic hydrogen production of CdS quantum dot (QD)-sensitized TiO2 nanorod arrays (NRAs) decorated with Ag nanoparticles synthesized using simple and cost-effective routes. TiO2 NRAs were grown on a fluorine-doped tin oxide (FTO) substrate via a hydrothermal method, followed by loading with Ag nanoparticles and deposition of CdS QDs using electrochemical and successive ionic layer adsorption and reaction (SILAR) approaches. In this arrangement, the Ag nanoparticles were found to be sandwiched between the photo-electron collector TiO2 and the photosensitizer CdS QDs that act as an electron relay, thus speeding the electron transport and improving photogenerated charge separation. CdS QDs significantly enhance the solar light absorption capability of the photoelectrode from the ultraviolet to the visible portion of the solar spectrum, improving the photoconversion efficiency. The surface morphology and optical properties of the as-prepared photoanodes were investigated using scanning electron microscopy and a UV-vis spectrometer. Scanning electron microscopy (SEM) images confirm that increasing the number of SILAR cycles caused agglomeration of the CdS QDs on the TiO2 NRAs surface. Photoelectrochemical hydrogen production performance was investigated with linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) under simulated solar light of 100 mW cm(-2). The LSV results confirm that the bare TiO2 NRAs exhibit a maximum photocurrent density of 0.17 mA cm(-2) at 1.23 V-RHE. However, upon the deposition of CdS QDs, an optimum photocurrent density of 0.623 mA cm(-2) at 1.23 V-RHE was observed for the 10 SILAR cycle samples, which was further improved to 0.931 mA cm(-2) at 1.23 V-RHE upon the introduction of Ag nanoparticles.
dc.description.sponsorshipScientific Research Projects Unit of Cukurova University [FBA-2019-12171]; Scientific and Technological Research Council of Turkey (TUBITAK)
dc.description.sponsorshipThis work was supported by the Scientific Research Projects Unit (FBA-2019-12171) of Cukurova University, and the Scientific and Technological Research Council of Turkey (TUBITAK).
dc.identifier.doi10.1039/d2nj00678b
dc.identifier.endpage9297
dc.identifier.issn1144-0546
dc.identifier.issn1369-9261
dc.identifier.issue19
dc.identifier.scopus2-s2.0-85129944053
dc.identifier.scopusqualityQ2
dc.identifier.startpage9290
dc.identifier.urihttps://doi.org/10.1039/d2nj00678b
dc.identifier.urihttps://hdl.handle.net/20.500.13099/1906
dc.identifier.volume46
dc.identifier.wosWOS:000788240000001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherRoyal Soc Chemistry
dc.relation.ispartofNew Journal of Chemistry
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250316
dc.subjectNanotube Arrays
dc.subjectWater
dc.subjectNanocomposites
dc.subjectPhotoanode
dc.subjectGeneration
dc.subjectComposite
dc.subjectEvolution
dc.titleThe investigation of CdS-quantum-dot-sensitized Ag-deposited TiO2 NRAs in photoelectrochemical hydrogen production
dc.typeArticle

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