Application of BDD thin film electrode for electrochemical decomposition of heterogeneous aromatic compounds

• Autorzy: Justyna Czupryniak , Aleksandra Fabiańska , Piotr Stepnowski , Tadeusz Ossowski , Robert Bogdanowicz , Marcin Gnyba , Ewa Siedlecka
• Języki publikacji: EN

Abstrakty

EN

The aim of the presented study is to investigate the applicability of electrochemical oxidation of aromatic compounds containing heteroatoms, e.g. waste from production of pesticides or pharmaceutics, at a borondoped diamond (BDD) electrode. The BDD electrodes were synthesized by microwave plasma enhanced chemical vapour deposition (MW PE CVD). Investigation of the electrode surface by optical microscopy and scanning electron microscopy (SEM) confirmed that the synthesized layer was continuous and formed a densely packed grain structure with an average roughness of less than 0:5 μm. The influence of important electrochemical parameters: current density, kind of reactor, pH or mixing operation, on the efficiency of the oxidation was investigated. The fouling of electrode’s surface caused by the deposition of organic material was observed during CV and galvanostatic experiments. At low current density the oxidation rate constant k was low, but the current efficiency was relatively high. The BDD can be used successfully to remove heterogeneous aromatic compounds existing either as molecules or cations. During 4 h of electrolysis 95% of aromatic compounds were electrochemically decomposed to mineral forms. It was observed that the influence of the initial pH on mineralization was marginal.

Słowa kluczowe

EN

microwave plasma chemical vapour deposition; boron-doped diamond electrode; electrochemical oxidation; aromatic compounds

• Czasopismo: Open Physics
• Rocznik: 2012
• Tom: 10
• Numer: 5
• Strony: 1183-1189

Daty

wydano

2012-10-01

online

2012-11-21

Twórcy

autor

Justyna Czupryniak

• Analytical Chemistry, Faculty of Chemistry, University of Gdańsk, 18 Sobieskiego Str., 80-952, Gdańsk, Poland

autor

Aleksandra Fabiańska

• Analytical Chemistry, Faculty of Chemistry, University of Gdańsk, 18 Sobieskiego Str., 80-952, Gdańsk, Poland

autor

Piotr Stepnowski

• Analytical Chemistry, Faculty of Chemistry, University of Gdańsk, 18 Sobieskiego Str., 80-952, Gdańsk, Poland

autor

Tadeusz Ossowski

• Analytical Chemistry, Faculty of Chemistry, University of Gdańsk, 18 Sobieskiego Str., 80-952, Gdańsk, Poland

autor

Robert Bogdanowicz

• Department of Metrology and Optoelectronics, Gdańsk University of Technology, 11/12 Narutowicza Str., 80-233, Gdańsk, Poland,

autor

Marcin Gnyba

• Department of Metrology and Optoelectronics, Gdańsk University of Technology, 11/12 Narutowicza Str., 80-233, Gdańsk, Poland

autor

Ewa Siedlecka

• Analytical Chemistry, Faculty of Chemistry, University of Gdańsk, 18 Sobieskiego Str., 80-952, Gdańsk, Poland

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Identyfikatory

DOI

10.2478/s11534-012-0058-3