Bismuth vanadate-nanostructured graphite electrodes for Rhodamine B photoelectrochemical degradation

Página do item simplificado
dc.creatorIsecke, Bruna Guimarães
dc.creatorGuimarães, Arthur Saldanha
dc.creatorTeixeira, Guilhermina Ferreira
dc.creatorColmati Junior, Flavio
dc.creatorSouza, Aparecido Ribeiro de
dc.creatorMacêdo, Isaac Yves Lopes de
dc.creatorDuarte, Lucas Mattos
dc.creatorOliveira, Sérgio Botelho de
dc.creatorCosta, André Gabriel Carmo
dc.creatorSomerset, Vernon Sydwill
dc.creatorGil, Eric de Souza
dc.date.accessioned2023-06-19T11:20:26Z
dc.date.available2023-06-19T11:20:26Z
dc.date.issued2023-01-03
dc.description.abstractElectrocatalysis is a promising way to treat water contaminated by harmful organic compounds. The combination of nanoparticles supported on a conductive substrate allows degradation to occur under less energetic conditions. This work evaluated the effect of deposition of bismuth vanadate (BVO) particles on pencil-type graphite electrodes. BVO particles were obtained by ultrasonic irradiation with coprecipitation. Then, they were deposited on the surface of a graphite electrode by the impregnation method. A 2³ -design was used to optimize electrode fabrication. Matter Dispersion Spectroscopy (SEM/EDS), X-Ray Diffraction (XRD) and Dynamic Light Scattering (DLS) were used for characterization. Electrochemical characterization was performed by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The results confirmed the synthesis of BVO@C (BVO/graphite). Furthermore, BVO@C significantly increased the electroactive surface area of the electrode, decreased the electron transfer resistance, and significantly increased the electron transfer rate to a greater extent than the electrode without any modification. To prove that the performance of BVO@C is better than the pure electrode, photoelectrocatalysis (PEC) and electrocatalysis (EC) were performed in a rhodamine B (RhB) solution. The results showed that in 5 min of treatment with unmodified electrode, BVO@C EC system and BVO@C PEC system, there was degradation of 31.53%, 46.09% and 58.17% respectively, reaching 95%, 98% and 99.64%, respectively, in 30 min. The reaction rate constants were calculated and to be found k = 0.10272 m−¹ , k = 0.12221 m−¹ and k= 0.15022 m−¹ for the unmodified graphite, BVO@C EC System and BVO@C PEC system, respectively. These results demonstrate that the BVO@C electrodes are efficient for application in a wide range of treatments, including the treatment of organic pollutants.pt_BR
dc.identifier.citationISECKE, Bruna Guimarães et al. Bismuth vanadate-nanostructured graphite electrodes for Rhodamine B photoelectrochemical degradation. Photochem, Basel, v. 3, n. 1, p. 38-58, 2023. DOI: 10.3390/photochem3010003. Disponível em: https://www.mdpi.com/2673-7256/3/1/3. Acesso em: 16 jun. 2023.pt_BR
dc.identifier.doihttps://doi.org/10.3390/photochem3010003
dc.identifier.issne- 2673-7256
dc.identifier.urihttp://repositorio.bc.ufg.br/handle/ri/22744
dc.language.isoengpt_BR
dc.publisher.countrySuicapt_BR
dc.publisher.departmentInstituto de Química - IQ (RMG)pt_BR
dc.rightsAcesso Abertopt_BR
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectDye degradationpt_BR
dc.subjectPhotoelectrocatalysispt_BR
dc.subjectOrganic pollutantspt_BR
dc.subjectWater remediationpt_BR
dc.titleBismuth vanadate-nanostructured graphite electrodes for Rhodamine B photoelectrochemical degradationpt_BR
dc.typeArtigopt_BR

Arquivos

Pacote Original
Agora exibindo 1 - 1 de 1
Nenhuma Miniatura disponível
Nome:
Artigo - Bruna Guimarães Isecke - 2022.pdf
Tamanho:
5.09 MB
Formato:
Adobe Portable Document Format
Descrição:
Baixar
Licença do Pacote
Agora exibindo 1 - 1 de 1
Nenhuma Miniatura disponível
Nome:
license.txt
Tamanho:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descrição:
Baixar

Coleções

IQ - Artigos publicados em periódicos