Synthesis of RGO/TiO2 nanocomposite flakes and characterization of their unique electrostatic properties using zeta potential measurements

Agnieszka Maria Jastrzębska , Joanna Karcz , Rafał Letmanowski , Dariusz Zabost , Ewelina Ciecierska , Maciej Siekierski , Andrzej Olszyna

Abstract

The study aimed at describing the influence of the modification of the electrostatic properties of titanium dioxide (TiO2) nanoparticles by their in situ deposition on the surface of reduced graphene oxide (RGO). For RGO/TiO2 (40 wt%) nanocomposite flake synthesis, we have developed the innovative simplified sol-gel method which is followed by the thermal decomposition of the organic precursor (the intermediate product). The investigation results confirmed that the TiO2 nanoparticles (ca. 94 nm) that covered the surface of RGO existed mostly in the form of hexagonal anatase nanocrystals and were covalently bonded to the RGO surface. The layer of TiO2 nanoparticles acted as an effective spreader between individual RGO flakes. The deposition of TiO2 nanoparticles resulted in a 40% increase of the BET specific surface area of GO. In our study, we show that the deposition of TiO2 nanoparticles on the surface of RGO flakes modifies their electrostatic properties. This suggests that RGO flakes influence the zeta potential of the RGO/TiO2 (40 wt%) surface which would be composed only of TiO2 (contrary to the theory of charged surface sights). The influence of RGO on zeta potential measured on the surface of RGO/TiO2 (40 wt%) nanocomposite flakes was most visible in a distilled water environment and a sodium chloride solution.
Author Agnieszka Maria Jastrzębska ZMCP
Agnieszka Maria Jastrzębska,,
- Division of Ceramic Materials and Polymers
, Joanna Karcz WIM
Joanna Karcz,,
- Faculty of Materials Science and Engineering
, Rafał Letmanowski KChNTCS
Rafał Letmanowski,,
- Chair Of Inorganic Chemistry And Solid State Technology
, Dariusz Zabost KChNTCS
Dariusz Zabost,,
- Chair Of Inorganic Chemistry And Solid State Technology
, Ewelina Ciecierska ZPM
Ewelina Ciecierska,,
- Division of Materials Design
, Maciej Siekierski KChNTCS
Maciej Siekierski,,
- Chair Of Inorganic Chemistry And Solid State Technology
, Andrzej Olszyna ZMCP
Andrzej Olszyna,,
- Division of Ceramic Materials and Polymers
Journal seriesJournal of Alloys and Compounds, ISSN 0925-8388
Issue year2016
Vol679
Pages470-484
Publication size in sheets0.7
Keywords in EnglishGraphene, Titanium dioxide, RGO/TiO2 nanocomposites, Nanoparticle deposition, Zeta potential, Electrostatic charge
DOIDOI:10.1016/j.jallcom.2016.04.043
URL http://www.sciencedirect.com/science/article/pii/S092583881630994X
Languageen angielski
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1-s2.0-S092583881630994X-main.pdf (file archived - login or check accessibility on faculty) 1-s2.0-S092583881630994X-main.pdf 3.75 MB
Score (nominal)35
ScoreMinisterial score = 35.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 3.133 (2) - 2016=2.919 (5)
Citation count*12 (2018-02-22)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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