Journal of Solid State Electrochemistry

, Volume 22, Issue 5, pp 1571–1580 | Cite as

Alachlor removal performance of Ti/Ru0.3Ti0.7O2 anodes prepared from ionic liquid solution

  • Rodrigo de Mello
  • Lucas H.E. Santos
  • Marília M.S. Pupo
  • Katlin I.B. Eguiluz
  • Giancarlo R. Salazar-Banda
  • Artur J. Motheo
Original Paper
  • 118 Downloads

Abstract

Electrochemical processes have a considerable impact on the treatment of contaminated water and wastewater, since water reuse is becoming increasingly necessary. One of the most important variables in electrochemical degradation of organic substances is the electrode material. Several materials have been used successfully as anodes, highlighting those of boron-doped diamond and mixed metal oxide (MMO). The first one is characterized by the high generation of hydroxyl radicals while the second is well known for generating different oxidant species depending on the electrolyte solution composition. The present work aims to develop MMO anodes through thermal decomposition using 1-butylimidazolium hydrogen sulfate, an ionic liquid, as solvent in the precursor solution preparation. The ionic liquid prepared anodes characterization was performed by different techniques such as, scanning electron microscopy (SEM), X-ray diffraction and cyclic voltammetry, and their electrocatalytic performance was evaluated by the electrochemical degradation of alachlor. The commercial electrode presented larger internal area than the electrodes produced by the alternative method, but its efficiency was ca. 16% lower and its energy consumption was 16% higher than the laboratory-made electrode and calcined at 550 °C. Based on SEM results, this behavior can be attributed to the distribution of RuO2 on the surface of the laboratory-made electrodes in comparison to the commercial one. Furthermore, the ionic liquid prepared electrodes showed an increase at least 8% in the voltammetric charge in the stability tests.

Keywords

Mixed metal oxide Ionic liquids Organochlorine pollutants Electrochemical degradation Alachlor 

Abbreviations

ILPE

Ionic liquid prepared electrode

Notes

Acknowledgements

The authors thank the financial support from São Paulo Research Foundation (FAPESP), Sergipe State Research and Technological Innovation Foundation (FAPITEC/SE), the Coordination for the Improvement of Higher Education Personnel (CAPES), and the National Council for Scientific and Technological Development (CNPq: 130849/2016-2, 304419/2015-0, 140669/2014-0 and 310282/2013-6).

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Copyright information

© Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Rodrigo de Mello
    • 1
  • Lucas H.E. Santos
    • 1
  • Marília M.S. Pupo
    • 2
  • Katlin I.B. Eguiluz
    • 2
  • Giancarlo R. Salazar-Banda
    • 2
  • Artur J. Motheo
    • 1
  1. 1.São Carlos Institute of ChemistryUniversity of São PauloSão CarlosBrazil
  2. 2.Electrochemistry and Nanotechnology Laboratory, Research and Technology Institute/Processes Engineering Postgraduate-PEPUniversity TiradentesAracajuBrazil

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