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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.)

Hydrogen Peroxide Electrogeneration by Gas Diffusion Electrode Modified with Tungsten Oxide Nanoparticles for Degradation of Orange II and Sunset Yellow FCF Azo Dyes

Full text
Author(s):
Paz, Edson C. [1, 2] ; Pinheiro, Victor S. [2] ; Aveiro, Luci R. [2] ; Souza, Fernanda L. [2] ; Lanza, V, Marcos R. ; Santos, Mauro G. [2]
Total Authors: 6
Affiliation:
[1] Inst Fed Educ Ciencia & Tecnol Maranhao IFMA, Campus Acailandia, R Projetada S-N, BR-65930000 Acailandia, MA - Brazil
[2] Univ Fed ABC UFABC, LEMN, CCNH, Rua Santa Adelia 166, BR-09210170 Santo Andre, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Journal of the Brazilian Chemical Society; v. 30, n. 9, p. 1964-1975, SEP 2019.
Web of Science Citations: 0
Abstract

In this work, the gas diffusion electrode (GDE) cathode of Vulcan XC72 carbon modified with nanoparticles of WO2.72 (WO2.72 / Vulcan XC72) was used for H2O2 electrogeneration and degradation of 350 mL of Orange II (OH) and Sunset Yellow FCF (SY) azo dyes by electro-Fenton (EF) and photoelectro-Fenton (PEF) processes with different Fe2+ initial content (1.00, 0.50 and 0.25 mmol L-1). The WO2.72 / Vulcan XC72 GDE electrolyzed approximately 3 times more H2O2 than the Vulcan XC72 GDE. Decolorizations and mineralizations of the dye solutions were more efficient at higher concentrations of Fe2+. The decolorization decay showed pseudo-first-order kinetics. The most promising decolorization results obtained at processes of WO2.72 / Vulcan XC72 cathode combined with Pt anode (100% color removal of OII and SY at 30 and 20 min of electrolysis with 1.00 mmol L-1 Fe2+, respectively). The best mineralization achieved in trials of WO2.72 / Vulcan XC72 cathode combined with boron-doped diamond (BDD) anode (82% total organic carbon (TOC) removal of OII by PEF / 1.00 after 3 h and 90% TOC removal of SY by PEF / 050 after 4 h). It was found that SY decolorization was faster and mineralization showed a similar yield independent of oxidized dye. (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