Synthesis and photocatalytic performance of Bi2O3 thin films obtained in a homemade spin coater

Autor(es)

Falsetti, Paulo H. E. ^[1] ; Soares, Fernando C. ^[2] ; Rodrigues, Gabriel N. ^[3] ; Del Duque, Douglas M. S. ^[3] ; de Oliveira, Wlademir R. ^[3] ; Gianelli, Bruno F. ^[3] ; de Mendonca, Vagner R. ^{[2, 3]}

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, UFSCar, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Fed Sao Carlos, UFSCar, BR-18052780 Sorocaba, SP - Brazil

^[3] IFSP Fed Inst Educ Sci & Technol Sao Paulo, BR-18202000 Itapetininga, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS TODAY COMMUNICATIONS; v. 27, JUN 2021.
• Citações Web of Science: 0

Resumo

This paper describes the deposition of Bi2O3 thin films by spin-coating in a homemade apparatus and their application as photocatalyst in dye photodegradation under UV radiation. For substrate fixation in the spin coating equipment, we developed an alternative method named fit-in method, where the substrate is directlly fixed in a polytetrafluorethylene (PTFE) polymer base used as a sample holder. The Bi2O3 precursor resin was obtained according to the polymeric precursor method and deposited on glass substrates by a dynamic system operating at 4000 RPM, varying the number of added drops (10 or 20), followed by a calcination step to promote oxide crystallization. The thin films were characterized by X-ray diffratometry (XRD), scanning electronic microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), atomic force microscopy (AFM), and sessile drop method (SDM). The photocatalytic efficiency of Bi2O3 thin films was evaluated by the photodegradation of Rhodamine B (RhB) under UV radiation. The as-obtained Bi2O3 thin films presented high performance in RhB dye removal from aqueous solution and stability during five cycles of reuse, regardless of deposition conditions, which is considered the main feature of a thin film used as a photocatalyst. (AU)

• Processo FAPESP: 13/26366-1 - Desenvolvimento de filmes finos heteroestruturados à base de BiVO4 para aplicação na fotodegradação de poluentes orgânicos
• Beneficiário: Vagner Romito de Mendonça
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 17/17476-9 - Síntese e propriedades fotocatalíticas de filmes finos heteroestruturados: o caso do sistema BiVO4/Bi2O3
• Beneficiário: Paulo Henrique Eleuterio Falsetti
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica