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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.)

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

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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]
Total Authors: 6
[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
Total Affiliations: 2
Document type: Journal article
Web of Science Citations: 1

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)

FAPESP's process: 18/25241-4 - Investigation of structural, electrical and optical properties of the hybrid structure PbxSn1-xO2/TiO2: interface analysis and influence of substrate temperature
Grantee:Stevan Brayan Oliveira dos Santos
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 18/26039-4 - Investigation of the semiconductor oxide SnO2, in the form of thin films, and combination with Cu2-xS forming multilayered heterostructures
Grantee:João Victor Morais Lima
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 19/00683-7 - Deposition of heterostrucures of SnO2 and TiO2 by dip-coating using a two phase technique
Grantee:Luiz Felipe Kaezmarek Pedrini
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC