nhancement of surface properties of solgel tin dioxide thin films with addition of surfactant in the precursor solutio

Autor(es)

Fonseca, Lucas P. ^[1] ; Pedrini, Luiz F. K. ^[2] ; Lima, Joao V. M. ^[2] ; Escaliante, Lucas C. ^[2] ; Santos, Stevan B. O. ^{[1, 2]} ; Scalvi, Luis V. A. ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ Unesp, Sch Sci, Dept Phys, BR-17033360 Bauru, SP - Brazil

^[2] Sao Paulo State Univ Unesp, Sch Sci, POSMAT Postgrad Program Mat Sci & Technol, BR-17033360 Bauru, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING; v. 127, n. 7 JUL 2021.
• Citações Web of Science: 1

Resumo

The use of the Triton X-100 nonionic surfactant in the precursor solution has revealed a fundamental increase on the surface area, which is very relevant for applications as gas sensors and in photocatalysis. Besides, this increases increase aids in adhesion of the SnO2 film onto the substrate. Surfactant presence leads to an increase in the roughness (rms) from 57.6 to 275 nm. The influence can also be observed in the XRD profiles, with a higher degree of crystallinity for deposited films from solutions with Triton. The surfactant inclusion decreases the defect density in the film even though it increases the electron scattering, leading to rather resistive films that are thermally excited only above room temperature. The activation energy for the defect ionization is rather high, 800 meV, but the thermal excitation takes place at a lower temperature range, compared to films prepared without Triton in the solution processing. The performance on photocatalysis is improved for films prepared with Triton X-100, with most of methylene blue dye degraded in the first 90 min when interacting with the sample. Combination of transparency and electrical properties of SnO2 with improved surface properties of films prepared with Triton X-100 leads to potential application in photoelectrocatalysis. (AU)

• Processo FAPESP: 18/25241-4 - Investigação das propriedades estruturais, elétricas e ópticas da estrutura híbrida PbxSn1-xO2/TiO2: análise da interface e influência da temperatura do substrato
• Beneficiário: Stevan Brayan Oliveira dos Santos
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 18/26039-4 - Investigação do semicondutor óxido SnO2, na forma de filmes finos, e combinação com Cu2-xS formando heteroestruturas multicamadas
• Beneficiário: João Victor Morais Lima
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 19/00683-7 - Deposição de heteroestruturas de SnO2 e TiO2 por dip-coating por um método que envolve duas fases
• Beneficiário: Luiz Felipe Kaezmarek Pedrini
• 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