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Fast and low-cost fabrication of 1D hematite photoanode in pure water vapor and air atmosphere: Investigation the effect of the oxidation atmosphere on the PEC performance of the hematite photoanodes

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dc.contributor.authorSARIOĞLU, CEVAT
dc.contributor.authorsDemirci, Selim; Sarioglu, Cevat
dc.date.accessioned2022-03-12T20:31:05Z
dc.date.available2022-03-12T20:31:05Z
dc.date.issued2017
dc.description.abstractIn this study, hematite photoanodes were successfully fabricated by thermal oxidation of the commercial cold-rolled steel at 500 degrees C in pure water vapor and air atmosphere. The crystal phase structure, surface morphology, and optical properties of the hematite photoanodes were characterized using an X-ray diffractometer (XRD), field emission scanning electron microscopy (FESEM) and UV-VIS spectrophotometer, respectively. The results showed that hematite photoanodes had high crystalline phase and the annealing atmosphere influenced the morphology of the hematite photoanodes. Moreover, nanowhisker and nanorod shaped nanostructures were observed on the substrate. The optical band gap values of the hematite photoanodes varied between 2.38 and 2.70 eV. Photoelectrochemical (PEC) studies of the hematite photoanodes were assessed in the 0.1 M NaOH electrolyte solution using the Mott-Schottky analysis and electrochemical impedance spectroscopy techniques. The PEC findings exhibited that the hematite photoanode annealed 15-min in water vapor had best PEC performance achieving photocurrent density 0.244 mA/cm(2) at 1.6 V vs. V-RHE and highest carrier density value (N-D = 1.15 x 10(21) cm(-3)). Furthermore, the photoanodes annealed in water vapor atmosphere revealed at least three times higher PEC performance than that of photoanodes annealed in air. Thermal oxidation method in water vapor is an efficient methods for fabrication of hematite photoanodes. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
dc.identifier.doi10.1016/j.ijhydene.2017.01.140
dc.identifier.eissn1879-3487
dc.identifier.issn0360-3199
dc.identifier.urihttps://hdl.handle.net/11424/234248
dc.identifier.wosWOS:000403381400039
dc.language.isoeng
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD
dc.relation.ispartofINTERNATIONAL JOURNAL OF HYDROGEN ENERGY
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectHematite
dc.subjectThermal oxidation
dc.subjectWater vapor
dc.subjectPhotoelectrochemical (PEC)
dc.subjectElectrochemical impedance spectroscopy (EIS)
dc.subjectALPHA-FE2O3 NANOTUBE ARRAYS
dc.subjectIRON-OXIDE FILMS
dc.subjectTHIN-FILMS
dc.subjectPHOTOELECTROCHEMICAL PERFORMANCE
dc.subjectOPTICAL-PROPERTIES
dc.subjectTHERMAL-OXIDATION
dc.subjectDEPOSITION
dc.subjectGROWTH
dc.subjectDYE
dc.subjectPHOTOOXIDATION
dc.titleFast and low-cost fabrication of 1D hematite photoanode in pure water vapor and air atmosphere: Investigation the effect of the oxidation atmosphere on the PEC performance of the hematite photoanodes
dc.typearticle
dspace.entity.typePublication
local.avesis.id9f1aa7be-0566-4417-a3cd-ecdc3212181e
local.import.packageSS17
local.indexed.atWOS
local.indexed.atSCOPUS
local.journal.numberofpages11
local.journal.quartileQ1
oaire.citation.endPage11149
oaire.citation.issue16
oaire.citation.startPage11139
oaire.citation.titleINTERNATIONAL JOURNAL OF HYDROGEN ENERGY
oaire.citation.volume42
relation.isAuthorOfPublication6ec6d31d-4f25-485a-b1ea-0fe14f90a990
relation.isAuthorOfPublication.latestForDiscovery6ec6d31d-4f25-485a-b1ea-0fe14f90a990

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