Highly exposed {001} facets of titanium dioxide modified with reduced graphene oxide for dopamine sensing

In view of the above facts, in this work, we introduce a simple synthetic route to prepare a reduced graphene oxide decorated TiO2 www.nature.com/scientificreports nanocomposite with highly exposed {001} facets

Gregory Thien Soon How; Alagarsamy Pandikumar; Huang Nay Ming; Lim Hong Ngee

2014

Scholarcy highlights

  • Titanium dioxide with highly exposed {001} facets was synthesized through a facile solvo-thermal method and its surface was decorated by using reduced graphene oxide sheets
  • In view of the above facts, in this work, we introduce a simple synthetic route to prepare a reduced graphene oxide decorated TiO2 www.nature.com/scientificreports nanocomposite with highly exposed {001} facets
  • The results of the study suggest that the glassy carbon electrode modified by using reduced graphene oxide/TiO2 nanocomposite with highly exposed {001} facets could be employed as a potential electrode material for electrochemical sensing applications
  • The high resolution transmission electron microscope image of the pristine TiO2 nanostructure is in good agreement with its corresponding field emission scanning electron microscope image. It is obviously clear from the HRTEM image of TiO2 that the inner sphere was packed with TiO2 nanoparticles whereas the TiO2 nanosheets were located on the surface of the clustered TiO2
  • With similar method followed by Chen et al., the TiO2 spheres formed were with almost 100% of their exposed {001} planes
  • A,2-fold increase in the redox peak current was observed for the rGO/TiO2 {001} modified GCE over the GCE modified by using rGO and rGO/TiO2 {101}, which suggests that the rGO/TiO2 {001} nanocomposite with the highly exposed {001} facets of TiO2 induced better electrical conductivity between the electrode and electrolyte interface
  • The rapid electron transfer and good electrocatalytic activity towards the oxidation of DA in the presence of ascorbic acid was achieved by the reduced graphene oxide/TiO2 {001} nanocomposite modified glassy carbon electrode

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