XANES-PCA analysis of Ti-species in MCM-41 mesoporous silica synthesized by different methods
- Autores
- Anunziata, Oscar Alfredo; Beltramone, Andrea Raquel; Martínez, María Laura; Giovanetti, Lisandro J.; Requejo, Félix G.; Ledec, Eduardo
- Año de publicación
- 2011
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- MCM-41 mesoporous silica was prepared with Ti incorporated in the structure by two different ways: hydrothermal and atmospheric pressure by sol–gel method. To evaluate each synthesis, these materials were in situ investigated through X-ray absorption fine structure (XAFS) spectroscopy in different stages of the synthesis. X-ray absorption structure at the near edge region (XANES) gives the coordination of Ti and the relative concentration of Ti-species present in the mesoporous materials, obtained by differ- ent synthesis. The Principal Component Analysis (PCA) of XANES spectra indicate that mesoporous silica modified by Ti synthesized by hydrothermal method has species with majority of Ti tetrahedrally coor- dinated. This coordination is increased up to six when the sample is hydrated. In the case of the sol–gel synthesis, Ti-sites have higher mean coordination, independently from the degree of hydration.
Fil: Anunziata, Oscar Alfredo. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación en Nanociencia y Nanotecnología. Córdoba; Argentina.
Fil: Beltramone, Andrea Raquel. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación en Nanociencia y Nanotecnología. Córdoba; Argentina.
Fil: Martínez, María Laura. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación en Nanociencia y Nanotecnología. Córdoba; Argentina
Fil: Giovanetti, Lisandro J..Universidad Nacional de la Plata. Departamento de Física. La Plata; Argentina.
Fil: Requejo, Félix G..Universidad Nacional de la Plata. Departamento de Física. La Plata; Argentina.
Fil: Ledec, Eduardo.Universidad Nacional de la Plata. Departamento de Física. La Plata; Argentina.
Peer Reviewed - Materia
-
Ti-K-XANES PCA/ITFA
Ti-MCMC-41
Hydrothermal synthesis Sol–gel procedure - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- 2024-03-27T20:05:50Z
- Repositorio
.jpg)
- Institución
- Universidad Tecnológica Nacional
- OAI Identificador
- oai:ria.utn.edu.ar:20.500.12272/10221
Ver los metadatos del registro completo
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XANES-PCA analysis of Ti-species in MCM-41 mesoporous silica synthesized by different methodsAnunziata, Oscar AlfredoBeltramone, Andrea RaquelMartínez, María LauraGiovanetti, Lisandro J.Requejo, Félix G.Ledec, EduardoTi-K-XANES PCA/ITFATi-MCMC-41Hydrothermal synthesis Sol–gel procedureMCM-41 mesoporous silica was prepared with Ti incorporated in the structure by two different ways: hydrothermal and atmospheric pressure by sol–gel method. To evaluate each synthesis, these materials were in situ investigated through X-ray absorption fine structure (XAFS) spectroscopy in different stages of the synthesis. X-ray absorption structure at the near edge region (XANES) gives the coordination of Ti and the relative concentration of Ti-species present in the mesoporous materials, obtained by differ- ent synthesis. The Principal Component Analysis (PCA) of XANES spectra indicate that mesoporous silica modified by Ti synthesized by hydrothermal method has species with majority of Ti tetrahedrally coor- dinated. This coordination is increased up to six when the sample is hydrated. In the case of the sol–gel synthesis, Ti-sites have higher mean coordination, independently from the degree of hydration.Fil: Anunziata, Oscar Alfredo. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación en Nanociencia y Nanotecnología. Córdoba; Argentina.Fil: Beltramone, Andrea Raquel. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación en Nanociencia y Nanotecnología. Córdoba; Argentina.Fil: Martínez, María Laura. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación en Nanociencia y Nanotecnología. Córdoba; ArgentinaFil: Giovanetti, Lisandro J..Universidad Nacional de la Plata. Departamento de Física. La Plata; Argentina.Fil: Requejo, Félix G..Universidad Nacional de la Plata. Departamento de Física. La Plata; Argentina.Fil: Ledec, Eduardo.Universidad Nacional de la Plata. Departamento de Física. La Plata; Argentina.Peer Reviewed2024-03-27T20:05:50Z2024-03-27T20:05:50Z2011info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articulopdfapplication/pdfhttp://hdl.handle.net/20.500.12272/10221-enginfo:eu-repo/semantics/openAccess2024-03-27T20:05:50Zhttp://creativecommons.org/licenses/by-nc-nd/4.0/Attribution-NonCommercial-NoDerivatives 4.0 InternacionalBeltramone, Andrea Raquel_X_Atribución (Attribution): En cualquier explotación de la obra autorizada por la licencia será necesario reconocer la autoría (obligatoria en todos los casos). _X_No comercial (Non Commercial): La explotación de la obra queda limitada a usos no comerciales. _X_Sin obras derivadas (No Derivate Works): La autorización para explotar la obra no incluye la posibilidad de crear una obra derivada (traducciones, adaptaciones, etc.). _X_Compartir igual (Share Alike): La explotación autorizada incluye la creación de obras derivadas siempre que se mantenga la misma licencia al ser divulgadas.reponame:Repositorio Institucional Abierto (UTN)instname:Universidad Tecnológica Nacional2026-09-24T12:45:07Zoai:ria.utn.edu.ar:20.500.12272/10221instacron:UTNInstitucionalhttp://ria.utn.edu.ar/Universidad públicaNo correspondehttp://ria.utn.edu.ar/oaigestionria@rec.utn.edu.ar; fsuarez@rec.utn.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:a2026-09-24 12:45:07.45Repositorio Institucional Abierto (UTN) - Universidad Tecnológica Nacionalfalse |
| dc.title.none.fl_str_mv |
XANES-PCA analysis of Ti-species in MCM-41 mesoporous silica synthesized by different methods |
| title |
XANES-PCA analysis of Ti-species in MCM-41 mesoporous silica synthesized by different methods |
| spellingShingle |
XANES-PCA analysis of Ti-species in MCM-41 mesoporous silica synthesized by different methods Anunziata, Oscar Alfredo Ti-K-XANES PCA/ITFA Ti-MCMC-41 Hydrothermal synthesis Sol–gel procedure |
| title_short |
XANES-PCA analysis of Ti-species in MCM-41 mesoporous silica synthesized by different methods |
| title_full |
XANES-PCA analysis of Ti-species in MCM-41 mesoporous silica synthesized by different methods |
| title_fullStr |
XANES-PCA analysis of Ti-species in MCM-41 mesoporous silica synthesized by different methods |
| title_full_unstemmed |
XANES-PCA analysis of Ti-species in MCM-41 mesoporous silica synthesized by different methods |
| title_sort |
XANES-PCA analysis of Ti-species in MCM-41 mesoporous silica synthesized by different methods |
| dc.creator.none.fl_str_mv |
Anunziata, Oscar Alfredo Beltramone, Andrea Raquel Martínez, María Laura Giovanetti, Lisandro J. Requejo, Félix G. Ledec, Eduardo |
| author |
Anunziata, Oscar Alfredo |
| author_facet |
Anunziata, Oscar Alfredo Beltramone, Andrea Raquel Martínez, María Laura Giovanetti, Lisandro J. Requejo, Félix G. Ledec, Eduardo |
| author_role |
author |
| author2 |
Beltramone, Andrea Raquel Martínez, María Laura Giovanetti, Lisandro J. Requejo, Félix G. Ledec, Eduardo |
| author2_role |
author author author author author |
| dc.subject.none.fl_str_mv |
Ti-K-XANES PCA/ITFA Ti-MCMC-41 Hydrothermal synthesis Sol–gel procedure |
| topic |
Ti-K-XANES PCA/ITFA Ti-MCMC-41 Hydrothermal synthesis Sol–gel procedure |
| dc.description.none.fl_txt_mv |
MCM-41 mesoporous silica was prepared with Ti incorporated in the structure by two different ways: hydrothermal and atmospheric pressure by sol–gel method. To evaluate each synthesis, these materials were in situ investigated through X-ray absorption fine structure (XAFS) spectroscopy in different stages of the synthesis. X-ray absorption structure at the near edge region (XANES) gives the coordination of Ti and the relative concentration of Ti-species present in the mesoporous materials, obtained by differ- ent synthesis. The Principal Component Analysis (PCA) of XANES spectra indicate that mesoporous silica modified by Ti synthesized by hydrothermal method has species with majority of Ti tetrahedrally coor- dinated. This coordination is increased up to six when the sample is hydrated. In the case of the sol–gel synthesis, Ti-sites have higher mean coordination, independently from the degree of hydration. Fil: Anunziata, Oscar Alfredo. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación en Nanociencia y Nanotecnología. Córdoba; Argentina. Fil: Beltramone, Andrea Raquel. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación en Nanociencia y Nanotecnología. Córdoba; Argentina. Fil: Martínez, María Laura. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación en Nanociencia y Nanotecnología. Córdoba; Argentina Fil: Giovanetti, Lisandro J..Universidad Nacional de la Plata. Departamento de Física. La Plata; Argentina. Fil: Requejo, Félix G..Universidad Nacional de la Plata. Departamento de Física. La Plata; Argentina. Fil: Ledec, Eduardo.Universidad Nacional de la Plata. Departamento de Física. La Plata; Argentina. Peer Reviewed |
| description |
MCM-41 mesoporous silica was prepared with Ti incorporated in the structure by two different ways: hydrothermal and atmospheric pressure by sol–gel method. To evaluate each synthesis, these materials were in situ investigated through X-ray absorption fine structure (XAFS) spectroscopy in different stages of the synthesis. X-ray absorption structure at the near edge region (XANES) gives the coordination of Ti and the relative concentration of Ti-species present in the mesoporous materials, obtained by differ- ent synthesis. The Principal Component Analysis (PCA) of XANES spectra indicate that mesoporous silica modified by Ti synthesized by hydrothermal method has species with majority of Ti tetrahedrally coor- dinated. This coordination is increased up to six when the sample is hydrated. In the case of the sol–gel synthesis, Ti-sites have higher mean coordination, independently from the degree of hydration. |
| publishDate |
2011 |
| dc.date.none.fl_str_mv |
2011 2024-03-27T20:05:50Z 2024-03-27T20:05:50Z |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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article |
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publishedVersion |
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http://hdl.handle.net/20.500.12272/10221 - |
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http://hdl.handle.net/20.500.12272/10221 |
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- |
| dc.language.none.fl_str_mv |
eng |
| language |
eng |
| dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess 2024-03-27T20:05:50Z http://creativecommons.org/licenses/by-nc-nd/4.0/ Attribution-NonCommercial-NoDerivatives 4.0 Internacional Beltramone, Andrea Raquel _X_Atribución (Attribution): En cualquier explotación de la obra autorizada por la licencia será necesario reconocer la autoría (obligatoria en todos los casos). _X_No comercial (Non Commercial): La explotación de la obra queda limitada a usos no comerciales. _X_Sin obras derivadas (No Derivate Works): La autorización para explotar la obra no incluye la posibilidad de crear una obra derivada (traducciones, adaptaciones, etc.). _X_Compartir igual (Share Alike): La explotación autorizada incluye la creación de obras derivadas siempre que se mantenga la misma licencia al ser divulgadas. |
| eu_rights_str_mv |
openAccess |
| rights_invalid_str_mv |
2024-03-27T20:05:50Z http://creativecommons.org/licenses/by-nc-nd/4.0/ Attribution-NonCommercial-NoDerivatives 4.0 Internacional Beltramone, Andrea Raquel _X_Atribución (Attribution): En cualquier explotación de la obra autorizada por la licencia será necesario reconocer la autoría (obligatoria en todos los casos). _X_No comercial (Non Commercial): La explotación de la obra queda limitada a usos no comerciales. _X_Sin obras derivadas (No Derivate Works): La autorización para explotar la obra no incluye la posibilidad de crear una obra derivada (traducciones, adaptaciones, etc.). _X_Compartir igual (Share Alike): La explotación autorizada incluye la creación de obras derivadas siempre que se mantenga la misma licencia al ser divulgadas. |
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