Increasing the photocatalytic and fungicide activities of Ag3PO4 microcrystals under visible-light irradiation

Autor(es)

Oliveira, Lucas Portela ^[1] ; de Foggi, Camila Cristina ^{[2, 3]} ; Alves da Silva Pimentel, Bruna Natalia ^[1] ; Assis, Marcelo ^[2] ; Andres, Juan ^[3] ; Longo, Elson ^[2] ; Vergani, Carlos Eduardo ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Sch Dent, Dept Dent Mat & Prosthodont, 1680 Humaita St, BR-14801903 Araraquara, SP - Brazil

^[2] Fed Univ Sao Carlos UFSCar, Dept Chem, 676 Washington Luis Highway, BR-13565905 Sao Paulo, SP - Brazil

^[3] Univ Jaume I UJI, Dept Phys & Analyt Chem, Av Vicent Sos Baynat S-N, Castellon De La Plana 12071 - Spain

• Tipo de documento: Artigo Científico
• Fonte: CERAMICS INTERNATIONAL; v. 47, n. 16, p. 22604-22614, AUG 15 2021.
• Citações Web of Science: 0

Resumo

The present study reports for the first time the performance of silver phosphate (Ag3PO4) microcrystals as photocatalyst (degradation of Rodamine B-RhB) and antifungal agent (against Candida albicans-C. albicans) under visible-light irradiation (455 nm). Ag3PO4 microcrystals were synthesized by a simple co-precipitation (CP) method at room temperature. The structural and electronic properties of the as-synthetized Ag3PO4 have been investigated before and after 4 cycles of RhB degradation under visible light using X-ray diffraction (XRD), micro-Raman spectroscopy, UV-Vis spectrophotometer and field emission scanning electron microscopy (FESEM) images. The antifungal activity was analyzed in planktonic cells and 48h-biofilm of C. albicans by colony forming units (CFU) counting, confocal laser and FE-SE microscopies. Statistical analysis was carried out using SPSS software. Morphological and structural modifications of Ag3PO4 were observed upon recycling. After 4 recycles, the material maintained its photodegradation property; an eightfold increase in the efficiency of Ag3PO4 was observed in planktonic cells and a two fold increase in biofilm when irradiated under visible light. Thus, higher antifungal effectiveness against C. albicans was obtained when associated with visible-light irradiation. (AU)

• Processo FAPESP: 15/13834-2 - Avaliação da atividade antifúngica e citotoxicidade de microcristais de alfa vanadato de prata (a-AgVO3) sintetizados em diferentes temperaturas
• Beneficiário: Bruna Natalia Alves da Silva Pimentel
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 19/13507-2 - Caracterização e atividade antimicrobiana de filmes de Ag2WO4 depositados por laser de fentossegundo em superfície de titânio
• Beneficiário: Camila Cristina de Foggi
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• Processo FAPESP: 17/12594-3 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Camila Cristina de Foggi
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado