Bandas Cornelia

Lazau Carmen

Morariu Mina-Ionela

Nicolaescu Mircea

Orha Corina

English

University of Szeged

29th International Symposium on Analytical and Environmental Problems  78  COMPARATIVE MORPHOSTRUCTURAL AND ELECTROCHEMICAL CHARACTERIZATION OF HYBRID ELECTRODE Ti-TiO2/rGO CORRELATED WITH THE SYNTHESIS METHOD  Cornelia Bandas1*, Mircea Nicolaescu1, Mina-Ionela Morariu (Popescu)1,2, Corina Orha1, Carmen Lazau1  1National Institute for Research and Development in Electrochemistry and Condensed Matter Timisoara, Dr. A.P. Podeanu no.144, 300569, Timisoara Romania; orha.corina@gmail.com; carmenlazau@yahoo.com; nicolaescu.mircea13@yahoo.com; mina.popescu37@gmail.com 2 ”Politehnica” University of Timisoara, P-ta Victoriei no.2, 300006 Timisoara, Romania; *Corresponding author: cornelia.bandas@gmail.com  Recently, graphene has been widely used with excellent results in electrochemical sensors because of its superior electrical conductivity, high surface: volume ratio, and a rapid electron transfer rate. Because graphene's electrocatalytic activity is restricted, it is often combined with metal oxides to obtain hybrid nanomaterials [1]. To fabricate the hybrid of TiO2 nanoparticles, nanospheres, and nanofibers with graphene nanosheets have been reported through various methods, such as sol–gel, hydrothermal and solvothermal method [2]. For the liquids deposition, there are a variety techniques such as dip-coating [3], spray-coating [4], doctor Blade, spin-coating etc.  This research investigated the comparative study of two different methods, as spin-coating and dip-coating, for obtaining the advanced hybrid electrodes based on reduced graphene oxide deposited onto a titanium plate anode, named Ti-TiO2/rGO. TiO2 nanolayer was grown on titanium foil by thermal oxidation (Ti-TiO2) at 500°C in 0.5 M hydrofluoric acid. Dip-coating technique is a facile and low-cost method for fabrication of hybrid electrode Ti-TiO2/rGO (code Ti-TiO2/rGO1). As comparison, spin-coating methodology was used, at speed of 1500 rot and time 10 sec, being deposited 6 layers of TiO2/GO pasta on both sides of Ti support (code Ti-TiO2/rGO2). Specific investigations, such as X-ray diffraction, UV-VIS analysis, and SEM morphology, were used to analyses the morpho-structural and optical properties of the obtained electrodes. The electrochemical characterization will be performed by cyclic voltammetry, in 1M KOH supporting electrolyte, scan range -0.3 V/SCE and 1.4 V/SCE.   References 1.  L. Fu, S. Mao, F. Chen, S. Zhao, W. Su, G.Lai, A. Yu, C.-T. Lin , Chemosphere , 297, 2022, 134127;  2. X. Zhang, P. Suresh Kumar, V. Aravindan, H.H. Liu, J. Sundaramurthy, S.G. Mhaisalkar, H.M. Duong, S. Ramakrishna, S. Madhavi, J. Phys. Chem. C 2012, 116, 14780. 3. C. Lazau; C. Bandas; M. Nicolaescu; C. Orha; A. Pop, Proceedings of the International Semiconductor Conference, CAS, 2022, 2022-October, pp. 277–280 DOI: 10.1109/CAS56377.2022.9934754 4. H.T. Chou; S.T. Chen; C.H. Wang; H.C. Hsu; T.Y. Kao; Z.H. Lin, IEEE Journal of Photovoltaics,11, 5, 2021, 1236 – 1242, 10.1109/JPHOTOV.2021.3090168  Acknowledgements This work was supported by a grant of the Ministry of Research, Innovation and Digitization, CNCS - UEFISCDI, project number PN-III-P1-1.1-TE-2021-0963, within PNCDI III, with contract number TE13/2022 (DD-CyT), partially project code PN 23 27 01 02 INOMAT, 23-27 29N/2023.   

Comparative morphostructural and electrochemical characterization of hybrid electrode Ti-TiO2/rGO correlated with the synthesis method : [abstract]

http://acta.bibl.u-szeged.hu/82371/1/proceedings_of_isaep_2023_078.pdf

Comparative morphostructural and electrochemical characterization of hybrid electrode Ti-TiO2/rGO correlated with the synthesis method : [abstract]

Abstract

Similar works

Full text

Available Versions

University of Szeged