Naslov
Influence of pH value on reduction of graphene oxide by olive mill wastewater

Autori
Vrdoljak, Matea ; Radić, Gabrijela ; Sačer, Denis ; Kraljić Roković, Marijana

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Fourth Conference of Young Chemists of Serbia, Book of abstracts / Todorović, Tamara ; Opsenica, Igor ; Dekanski, Aleksandar - Beograd : Serbian Chemical Society, 2016, 87-87

ISBN
978-86-7132-064-1

Skup
Fourth Conference of Young Chemists of Serbia

Mjesto i datum
Beograd, Srbija, 05.11.2016

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
graphene oxide ; reduced graphene oxide ; olive mill wastewater

Sažetak
The main goal of this research was the preparation of graphene by means of chemical reduction with phenolic compounds present in olive vegetation water at various pH values. The reduction of GO has been carried out at pH 7 and 10 and temperature of 80°C using olive leaf extract (OLE)solution and olive mill wastewater (OMW). The duration of the experiments was five hours, resulting in rGO(OLE, pH 7), rGO(OLE, pH 10) and rGO(OMW, pH 10) products. The course of the reduction was monitored using UV/Vis. The obtained products were characterized using cyclic voltametry, EIS, TGA, IR spectroscopy and four point probe method. Three different samples of rGO have been examined by cyclic voltametry during which a glassy carbon (GC) electrode was used as a current collector. rGO(OLE, pH 10) sample has shown the best capacitive properties. Some residual polyphenolic compounds have been noticed in rGO(OMW, pH 10) sample, as a result, anodic and cathodic current peaks were formed in the cyclic voltammogram. The highest specific capacitance, 25.11 F g-1, has been registered for rGO(OMW, pH 10) sample. By comparing capacitance of rGO(OLE, pH 10) and rGO(OLE, pH 7) samples it has been found that materials obtained by reduction at a higher pH value have better specific capacitance values.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo, Temeljne tehničke znanosti

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