Use of X-Ray Photoelectron Spectroscopy as an analytical tool for the study of contamination by Teflon in the synthesis of Mo(VI)Cl2O2Bipy/TiO2 catalysts
The preparation of catalysts can involve various sources of contamination, which can seriously affect the quality of the prepared materials. In the present work, a case of fluorine contamination in a set of catalyst samples was studied, in which using the X-Ray Photoelectron Spectroscopy (XPS) techn...
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Published in | Revista colombiana de química Vol. 51; no. 2 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Bogota
Universidad Nacional de Colombia
13.04.2023
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Abstract | The preparation of catalysts can involve various sources of contamination, which can seriously affect the quality of the prepared materials. In the present work, a case of fluorine contamination in a set of catalyst samples was studied, in which using the X-Ray Photoelectron Spectroscopy (XPS) technique, it was evidenced by the F 1s signal that this element was present in the form of Teflon, since its binding energy corresponded mainly to the CF2 species. Furthermore, using the C 1s signal, it was also possible to corroborate the presence of the CF2 group, which is associated with the main component of the Teflon carbon chains. The use of this information made it possible to identify that the solvent dehydration procedure (previous step to obtaining the catalysts) could lead to contamination with Teflon since it involved various accessories with Teflon, organic solvents and high temperature; the Teflon tape and the magnetic stirrer being the possible sources of contamination. |
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AbstractList | The preparation of catalysts can involve various sources of contamination, which can seriously affect the quality of the prepared materials. In the present work, a case of fluorine contamination in a set of catalyst samples was studied, in which using the X-Ray Photoelectron Spectroscopy (XPS) technique, it was evidenced by the F 1s signal that this element was present in the form of Teflon, since its binding energy corresponded mainly to the CF2 species. Furthermore, using the C 1s signal, it was also possible to corroborate the presence of the CF2 group, which is associated with the main component of the Teflon carbon chains. The use of this information made it possible to identify that the solvent dehydration procedure (previous step to obtaining the catalysts) could lead to contamination with Teflon since it involved various accessories with Teflon, organic solvents and high temperature; the Teflon tape and the magnetic stirrer being the possible sources of contamination. |
Author | Gómez Tarazona, Raúl Armando Martínez Ortega, Fernando Amaya Vesga, Álvaro Andrés Martínez Quiñónez, Henry Mendoza Castellanos, Yeisson Ricardo |
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Cites_doi | 10.1002/9781118162897 10.1002/9781119417651 10.1021/acs.chemrev.8b00114 10.1016/j.sctalk.2022.100007 10.1007/978-3-642-27381-0 10.3390/polym11101629 10.1016/S0169-4332(98)00009-9 10.3390/polym9120735 10.1002/sia.3026 10.1116/1.1247814 10.1016/j.apsusc.2010.11.116 10.1007/978-1-4684-8610-0_5 10.1021/acs.chemrev.9b00220 10.1016/j.molcata.2016.07.006 |
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SubjectTerms | Catalysts Contamination Dehydration Fluorine High temperature Molecular chains Photoelectrons Polytetrafluoroethylene Solvents Spectroscopic analysis Spectrum analysis Titanium dioxide X ray photoelectron spectroscopy |
Title | Use of X-Ray Photoelectron Spectroscopy as an analytical tool for the study of contamination by Teflon in the synthesis of Mo(VI)Cl2O2Bipy/TiO2 catalysts |
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