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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

Full text
Author(s):
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]
Total Authors: 7
Affiliation:
[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
Total Affiliations: 3
Document type: Journal article
Source: MATERIALS TODAY COMMUNICATIONS; v. 27, JUN 2021.
Web of Science Citations: 0
Abstract

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)

FAPESP's process: 13/26366-1 - Development of heterostructured thin films based on BiVO4 for application in organic pollutants photodegradation
Grantee:Vagner Romito de Mendonça
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 17/17476-9 - Synthesis and photocatalytic properties of heterostructured thin films: the case of BiVO4/Bi2O3 system
Grantee:Paulo Henrique Eleuterio Falsetti
Support Opportunities: Scholarships in Brazil - Scientific Initiation