Nanostructures for environmental remediation and power generation from renewable s...
| 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 |