Mineralization of bisphenol A (BPA) by anodic oxidation with boron-doped diamond (BDD) electrode

2-(Thiocyanomethylthio)-benzothiazole (TCMTB) is used as fungicide in the paper, tannery, paint, and coatings industries, and its study is important as it is considered toxic to aquatic life. In this study, a comparison of direct anodic oxidation (AO) using a boron-doped diamond electrode (BDD) and electro-Fenton (EF) processes for TCMTB degradation in acidic chloride and sulfate media using a FM01-LC reactor was performed. The results of the electrolysis processes studied in the FM01-LC reactor showed a higher degradation of TCMTB with the anodic oxidation process than with the electro-Fenton process, reaching 81% degradation for the former process versus 47% degradation for the latter process. This difference was attributed to the decrease in H2O2 during the EF process, due to parallel oxidation of chlorides. The degradation rate and current efficiency increased as a function of volumetric flow rate, indicating that convection promotes anodic oxidation and electro-Fenton processes. The results showed that both AO and EF processes could be useful strategies for TCMTB toxicity reduction in wastewaters.

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Degradation of 4,6-dinitro-o-cresol from water by anodic oxidation with a boron-doped diamond electrode

Electrochimica Acta ◽

10.1016/j.electacta.2005.01.015 ◽

2005 ◽

Vol 50 (18) ◽

pp. 3685-3692 ◽

Cited By ~ 74

Author(s):

Cristina Flox ◽

José Antonio Garrido ◽

Rosa María Rodríguez ◽

Francesc Centellas ◽

Pere-Lluís Cabot ◽

...

Keyword(s):

Anodic Oxidation ◽

Boron Doped Diamond ◽

Diamond Electrode ◽

Boron Doped ◽

Boron Doped Diamond Electrode

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Study of the Electrochemical Deposition of Cu/Sn Alloy Nanoparticles on Boron Doped Diamond Films for Electrocatalytic Nitrate Reduction

MRS Proceedings ◽

10.1557/opl.2013.16 ◽

2013 ◽

Vol 1511 ◽

Cited By ~ 2

Author(s):

Jorge T. Matsushima ◽

Andrea B. Couto ◽

Neidenei G. Ferreira ◽

Mauricio R. Baldan

Keyword(s):

Electrochemical Deposition ◽

Sem Analysis ◽

Homogeneous Distribution ◽

Alloy Nanoparticles ◽

Electrocatalytic Reduction ◽

Boron Doped Diamond ◽

Buffer Solution ◽

Bdd Electrode ◽

Boron Doped ◽

Dissolution Peak

ABSTRACTThis paper presents the study of the electrochemical deposition of Cu/Sn alloy nanoparticles on Boron Doped Diamond (BDD) films in order to improve their electrocatalytic activity and selectivity for application in nitrate electrochemical reduction. Cyclic voltammetry measurements evidenced the formation of Cu/Sn alloy electrodeposited on BDD electrode. The electrodeposited Cu/Sn can be better visualized by analyzing the dissolution process. By studying the dissolution peak separately, the dissolution peak of the Sn was obtained at a more positive potential, when compared with the dissolution peak of Cu. From the scanning electronic microscopy (SEM) analysis, the homogeneous distribution of the Cu/Sn alloys particles on BDD surface with grain size in nanometric scale was verified. From X-ray diffraction analysis, two Cu/Sn alloy phases (Cu41Sn11 and Cu10Sn3) were identified for the electrodeposits obtained at -0.5V and charge of 0.26 C. The electrocatalytic reduction of nitrate in 0.1 M Britton-Robinson (BR) buffer solution with pH 9 was analyzed. The BDD electrode modified with Cu/Sn alloy nanoparticles proved to potentiate the electrocatalytic reduction of nitrate.

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