Photoelectrocatalytic degradation of caffeine using bismuth vanadate modified with reduced graphene oxide

Autor(es)

Prado, Thiago M. ^[1] ; Silva, Fernando Lindo ^[1] ; Carrico, Amanda ^[1] ; Lanza, Marcos Roberto de Vasconcelos ^[2] ; Fatibello-Filho, Orlando ^[1] ; Moraes, Fernando C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Chem, Rodovia Washignton Luis S-N Km 235, POB 676, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Sao Paulo, Sao Carlos Inst Chem, Ave Trabalhador Sao Carlense 400, BR-13566590 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Materials Research Bulletin; v. 145, JAN 2022.
• Citações Web of Science: 0

Resumo

Bismuth vanadate modified with reduced graphene oxide (BiVO4/rGO) was synthesized with the aim of applying this semiconductor material in advanced oxidative processes (AOPs) using the photoelectrocatalytic properties of the material for caffeine degradation. The semiconductor material was characterized by Scanning electronic microscopy, X-ray diffraction, Raman spectroscopy and UV-Vis Diffuse reflectance spectrophotometry. Photoassisted linear sweep voltammetry experiments were carried out in order to evaluate the photocurrent generated in the processes. BiVO4/rGO was found to exhibit relatively better photoelectrocatalytic performance compared to bare BiVO4; this result confirms the fundamental role of the carbon-based material when it comes to photoanode construction. With regard to caffeine degradation by high performance liquid chromatography through the application of BiVO4/rGO photoanode, the signal used for monitoring the presence of the analyte exhibited a decrease of 100% of caffeine concentration from the original concentration, indicating the efficient removal of the compound from the sample. (AU)

• Processo FAPESP: 14/50945-4 - INCT 2014: Instituto Nacional de Tecnologias Alternativas para Detecção, Avaliação Toxicológica e Remoção de Micropoluentes e Radioativos
• Beneficiário: Maria Valnice Boldrin
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 17/10118-0 - Estudo e aplicação da tecnologia eletroquímica para a análise e a degradação de interferentes endócrinos: materiais, sensores, processos e divulgação científica
• Beneficiário: Marcos Roberto de Vasconcelos Lanza
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 20/01050-5 - Desenvolvimento e aplicação de sensores eletroquímicos e fotoeletroquímicos para a determinação de contaminantes emergentes em amostras de águas naturais
• Beneficiário: Orlando Fatibello Filho
• Modalidade de apoio: Auxílio à Pesquisa - Regular