Reduced graphene oxide/Titanium oxide nanocomposite synthesis via microwave-assisted method and supercapacitor behaviors

Basit Öğe Kaydı
dc.authorid0000-0002-1806-0330
dc.authorscopusid9735216100
dc.authorscopusid6701764282
dc.authorscopusid55580312100
dc.authorscopusid57190170387
dc.authorwosidAtes, Murat/G-3798-2012
dc.contributor.authorAteş, Murat
dc.contributor.authorBayrak, Yüksel
dc.contributor.authorYöruk, Ozan
dc.contributor.authorÇalışkan, Sinan
dc.date.accessioned2022-05-11T14:30:57Z
dc.date.available2022-05-11T14:30:57Z
dc.date.issued2017
dc.departmentFakülteler, Fen Edebiyat Fakültesi, Kimya Bölümü
dc.description.abstractIn this paper, graphene oxide (GO) was firstly synthesized by modification of Hummers method from the literature. Secondly, reduced graphene oxide (rGO)/Titanium oxide (TiO2) nanocomposites were synthesized with different wt/wt % of GO/TiO2 (1:1; 1:2; 1:5 and 1:10) by microwave-assisted method. By treating GO and GO/TiO2 nanocomposites in a microwave oven, reduced graphene oxide (rGO) and rGO/TiO2 materials could be obtained within power of 180 Win 10 min. The weight ratio of rGO and TiO2 was used to obtain the optimum conditions for nanocomposite materials. The rGO/TiO2 nanocomposite active materials were characterized by cyclic voltammetry (CV), Fourier-transform infrared - Attenuated total reflectance (FTIR-ATR), scanning electron microscopy-energy dispersion X-ray (SEM-EDX), thermogravimetry (TGA), differential thermal analyzer (DTA) and electrochemical impedance spectroscopy (EIS) analysis. Thirdly, supercapacitors were fabricated as a symmetric device with two electrode configuration. The device performances were tested by CV, galvanostatic constant current (CC), and EIS measurements. TGA analysis indicated that the thermal stability of the nanocomposites improved from rGO (40% at 892.8 degrees C) to nanocomposite as the initial feed ratio of [GO](o)/[TiO2](o) = 1/10 as (94% at 949.3 degrees C) increased. The result show that the as-prepared symmetrical rGO/TiO2 nanocomposite on the two-electrode system displays very high specific capacitance of 524.02 F/g at 2 mV/s for [GO](o)/[TiO2](o) = 1/5 with a high energy density of E = 50.07 Wh/kg at 2 mV/s for [GO](o)/[TiO2](o) = 1/1 and high power density of P = 58.6 kW/kg at a the scan rate 1000 mV/s for [GO](o)/[TiO2](o) = 1/1. Additionally, the symmetric electrode shows good cycling stability with a retention value of 6.6% for [GO](o)/[TiO2](o) = 1/1 after 1000 cycles. These good results suggest us that rGO/TiO2 nanocomposite which is obtained by microwave-assisted method has a great potential as an electrode material for supercapacitor applications. The equivalent circuit model of R-s(C-dl(RctW)) was used to explain parameters of solution resistance, double layer capacitance (Cdl), charge transfer resistance (R-ct), Warburg impedance (W). Theoretical and experimental values support with each other. (C) 2017 Elsevier B.V. All rights reserved.
dc.identifier.doi10.1016/j.jallcom.2017.08.298
dc.identifier.endpage551
dc.identifier.issn0925-8388
dc.identifier.issn1873-4669
dc.identifier.scopus2-s2.0-85028943644
dc.identifier.scopusqualityQ1
dc.identifier.startpage541
dc.identifier.urihttps://doi.org/10.1016/j.jallcom.2017.08.298
dc.identifier.urihttps://hdl.handle.net/20.500.11776/7252
dc.identifier.volume728
dc.identifier.wosWOS:000412818600062
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorAteş, Murat
dc.institutionauthorÇalışkan, Sinan
dc.language.isoen
dc.publisherElsevier Science Sa
dc.relation.ispartofJournal of Alloys and Compounds
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectSupercapacitor
dc.subjectReduced graphene oxide
dc.subjectMicrowave -assisted
dc.subjectCapacitance
dc.subjectTiO2
dc.subjectEnergy density
dc.subjectPower density
dc.subjectTio2 Nanotube Arrays
dc.subjectHigh-Performance
dc.subjectCarbon-Fiber
dc.subjectPhotocatalytic Reduction
dc.subjectComposites
dc.subjectElectrode
dc.subjectHybrid
dc.subjectZno
dc.subjectNanoparticles
dc.subjectTemperature
dc.titleReduced graphene oxide/Titanium oxide nanocomposite synthesis via microwave-assisted method and supercapacitor behaviors
dc.typeArticle

Dosyalar

Orijinal paket
Listeleniyor 1 - 1 / 1
Küçük Resim Yok
İsim:
7252.pdf
Boyut:
1.03 MB
Biçim:
Adobe Portable Document Format
Açıklama:
Tam Metin / Full Text
İndir

Koleksiyon

WoS İndeksli Yayınlar Koleksiyonu
Fen Edebiyat Fakültesi Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu