Influence of Supporting Electrolytes on RO 16 Dye Electrochemical Oxidation Using Boron Doped Diamond Electrodes

Autor(es)

Fernanda Lanzoni Migliorini ^[1] ; Andrea Boldarini Couto ^[2] ; Suellen Aparecida Alves ^[3] ; Marcos Roberto de Vasconcelos Lanza ^[4] ; Neidenêi Gomes Ferreira ^[5]

Afiliação do(s) autor(es)

^[1] Instituto Nacional de Pesquisas Espaciais - Brasil

^[2] Instituto Nacional de Pesquisas Espaciais - Brasil

^[3] Universidade Federal de São Carlos. Laboratório Interdisciplinar de Eletroquímica e Cerâmica - Brasil

^[4] Universidade de São Paulo. Instituto de Química de São Carlos - Brasil

^[5] Instituto Nacional de Pesquisas Espaciais - Brasil

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 20, n. 3, p. 584-591, 2017-03-13.

Resumo

The influence of different supporting electrolytes as well as of different current densities on RO16 dye electrochemical oxidation using BDD electrodes has been systematically studied. The RO16 azo-dye electrooxidation experiments were performed at different current densities and three different supporting electrolytes: H2SO4 0.1 mol L-1, HClO4 0.1 mol L-1 and K2SO4 0.1 mol L-1. The results showed that a higher degradation for reactive azo dye RO16 was observed for the K2SO4 (pH=10) supporting electrolyte for a current density of 100 mA cm-2. This behavior can be associated with the deprotonation effect of the dye molecule, which can facilitate breakdown of the molecule, specifically the azo bond making color removal more efficient. In addition, in this pH there is a greater amount of hydroxyl ion (OH-) available increasing the hydroxyl radical formation. (AU)

• Processo FAPESP: 10/18462-2 - Crescimento de Diamante Dopado sobre Titânio com Variação Controlada de Boro e de Carbono com Hibridização sp2 e sp3 como Eletrodos de Alto Desempenho Aplicados em Tratamento de Águas
• Beneficiário: Fernanda Lanzoni Migliorini
• Modalidade de apoio: Bolsas no Brasil - Doutorado