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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

MnO2/Vulcan-Based Gas Diffusion Electrode for Mineralization of Diazo Dye in Simulated Effluent

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Author(s):
Aveiro, L. R. [1, 2] ; da Silva, A. G. M. [3] ; Candido, E. G. [3] ; Paz, E. C. [1] ; Pinheiro, V. S. [1] ; Parreira, L. S. [3] ; Souza, F. M. [1] ; Antonin, V. S. [1] ; Camargo, P. H. C. [3] ; dos Santos, M. C. [1]
Total Authors: 10
Affiliation:
[1] Fed Univ ABC, Ctr Nat & Human Sci, Lab Electrochem & Nanostruct Mat, St Andre - Brazil
[2] Fed Inst Educ Sci & Technol Sao Paulo, IFSP, Sao Paulo, SP - Brazil
[3] Univ Sao Paulo, Inst Chem, Av Prof Lineu Prestes 748, Sao Paulo, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: ELECTROCATALYSIS; v. 11, n. 3 JAN 2020.
Web of Science Citations: 0
Abstract

Treatments of simulated effluent solutions containing the Reactive Black 5 (RB5) were carried out by electrochemical, photoelectrochemical, electro-Fenton and photoelectro-Fenton methods using a one-compartment cell with a boron-doped diamond anode and a 3% of manganese dioxide nanoflowers supported on a carbon Vulcan XC72 gas diffusion electrode cathode. In the photo-assisted processes, the solution was irradiated using a 40-W UVC lamp immersed in the treated solution. For Fenton-based processes, only 5 min was required to attain 95% (photoelectro-Fenton) and 93% (electro-Fenton) RB5 dye degradation. When conversion to CO2 is taken into account after 6-h treatment, electrochemical method mineralized 13% of the organic load whereas removals greater than 90% were attained using the Fenton-based processes. These completely different results can be explained by the distinct spatial availability of the generated hydroxyl radical: only near the anode surface as in electrochemical-based processes or added to those distributed across the solution bulk as in Fenton-based processes. Graphical (a) Percentage of colour removal at lambda = 596 nm and (b) Removal of TOC % vs electrolysis time. Methods: (black square) EF-BDD (1), (red circle) EFPA-BDD, (blue up-pointing triangle) AO-BDD, (white square) EF-BDD (2) and (white circle) EF-BDD (3). In the EFPA-BDD systems, the solution was irradiated with a 46-W UVC lamp at lambda = 254 nm. (AU)

FAPESP's process: 16/00819-8 - Controlled Synthesis of Nanomaterials based on Pd and Pt: Electrocatalytic Activity and Stability
Grantee:Luanna Silveira Parreira
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 17/26288-1 - Hybrid electrocatalysts based on Pd, Pt and Sn nanoparticles, and on ceria nanorods for application in fuel cells
Grantee:Victor dos Santos Pinheiro
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 15/10314-8 - Nanostructures for Phenol, Ciprofloxacin and 17±-ethinylestradiol Degradation
Grantee:Mauro Coelho dos Santos
Support type: Regular Research Grants
FAPESP's process: 17/22976-0 - Development of palladium and niobium nanoelectrocatalysts for alkaline direct ethanol fuel cells
Grantee:Felipe de Moura Souza
Support type: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 17/10118-0 - Study and application of electrochemical technology for the analysis and degradation of endocrine interferents: materials, sensors, processes and scientific dissemination
Grantee:Marcos Roberto de Vasconcelos Lanza
Support type: Research Projects - Thematic Grants
FAPESP's process: 17/21846-6 - Nanostructures for environmental remediation and power generation from renewable sources
Grantee:Mauro Coelho dos Santos
Support type: Program for Research on Bioenergy (BIOEN) - Regular Program Grants