Ag-Coated Heterostructures of ZnO-TiO2/Delaminated Montmorillonite as Solar Photocatalysts
Heterostructures based on ZnO-TiO2/delaminated montmorillonite coated with Ag have been prepared by sol–gel and photoreduction procedures, varying the Ag and ZnO contents. They have been thoroughly characterized by XRD, WDXRF, UV–Vis, and XPS spectroscopies, and N2 adsorption, SEM, and TEM. In all c...
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doaj-df04ed5edf2b4e4db52c9b21b125f1492020-11-24T21:54:10ZengMDPI AGMaterials1996-19442017-08-0110896010.3390/ma10080960ma10080960Ag-Coated Heterostructures of ZnO-TiO2/Delaminated Montmorillonite as Solar PhotocatalystsCarolina Belver0Mariana Hinojosa1Jorge Bedia2Montserrat Tobajas3Maria Ariadna Alvarez4Vicente Rodríguez-González5Juan Jose Rodriguez6Seccion de Ingenieria Quimica, Facultad de Ciencias, Universidad Autonoma de Madrid, Campus Cantoblanco, E-28049 Madrid, SpainDivision de Materiales Avanzados, IPICYT (Instituto Potosino de Investigación Científica y Tecnológica), Camino a la Presa San José 2055, C.P. 78216 San Luis Potosí, MexicoSeccion de Ingenieria Quimica, Facultad de Ciencias, Universidad Autonoma de Madrid, Campus Cantoblanco, E-28049 Madrid, SpainSeccion de Ingenieria Quimica, Facultad de Ciencias, Universidad Autonoma de Madrid, Campus Cantoblanco, E-28049 Madrid, SpainSeccion de Ingenieria Quimica, Facultad de Ciencias, Universidad Autonoma de Madrid, Campus Cantoblanco, E-28049 Madrid, SpainDivision de Materiales Avanzados, IPICYT (Instituto Potosino de Investigación Científica y Tecnológica), Camino a la Presa San José 2055, C.P. 78216 San Luis Potosí, MexicoSeccion de Ingenieria Quimica, Facultad de Ciencias, Universidad Autonoma de Madrid, Campus Cantoblanco, E-28049 Madrid, SpainHeterostructures based on ZnO-TiO2/delaminated montmorillonite coated with Ag have been prepared by sol–gel and photoreduction procedures, varying the Ag and ZnO contents. They have been thoroughly characterized by XRD, WDXRF, UV–Vis, and XPS spectroscopies, and N2 adsorption, SEM, and TEM. In all cases, the montmorillonite was effectively delaminated with the formation of TiO2 anatase particles anchored on the clay layer’s surface, yielding porous materials with high surface areas. The structural and textural properties of the heterostructures synthesized were unaffected by the ZnO incorporated. The photoreduction led to solids with Ag nanoparticles decorating the surface. These materials were tested as photocatalysts for the degradation of several emerging contaminants with different nitrogen-bearing chemical structures under solar light. The catalysts yielded high rates of disappearance of the starting pollutants and showed quite stable performance upon successive applications.https://www.mdpi.com/1996-1944/10/8/960ZnO-TiO2/delaminated montmorilloniteheterostructuresAg-coatingsolar photocatalytic activitywater purification |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Carolina Belver Mariana Hinojosa Jorge Bedia Montserrat Tobajas Maria Ariadna Alvarez Vicente Rodríguez-González Juan Jose Rodriguez |
spellingShingle |
Carolina Belver Mariana Hinojosa Jorge Bedia Montserrat Tobajas Maria Ariadna Alvarez Vicente Rodríguez-González Juan Jose Rodriguez Ag-Coated Heterostructures of ZnO-TiO2/Delaminated Montmorillonite as Solar Photocatalysts Materials ZnO-TiO2/delaminated montmorillonite heterostructures Ag-coating solar photocatalytic activity water purification |
author_facet |
Carolina Belver Mariana Hinojosa Jorge Bedia Montserrat Tobajas Maria Ariadna Alvarez Vicente Rodríguez-González Juan Jose Rodriguez |
author_sort |
Carolina Belver |
title |
Ag-Coated Heterostructures of ZnO-TiO2/Delaminated Montmorillonite as Solar Photocatalysts |
title_short |
Ag-Coated Heterostructures of ZnO-TiO2/Delaminated Montmorillonite as Solar Photocatalysts |
title_full |
Ag-Coated Heterostructures of ZnO-TiO2/Delaminated Montmorillonite as Solar Photocatalysts |
title_fullStr |
Ag-Coated Heterostructures of ZnO-TiO2/Delaminated Montmorillonite as Solar Photocatalysts |
title_full_unstemmed |
Ag-Coated Heterostructures of ZnO-TiO2/Delaminated Montmorillonite as Solar Photocatalysts |
title_sort |
ag-coated heterostructures of zno-tio2/delaminated montmorillonite as solar photocatalysts |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2017-08-01 |
description |
Heterostructures based on ZnO-TiO2/delaminated montmorillonite coated with Ag have been prepared by sol–gel and photoreduction procedures, varying the Ag and ZnO contents. They have been thoroughly characterized by XRD, WDXRF, UV–Vis, and XPS spectroscopies, and N2 adsorption, SEM, and TEM. In all cases, the montmorillonite was effectively delaminated with the formation of TiO2 anatase particles anchored on the clay layer’s surface, yielding porous materials with high surface areas. The structural and textural properties of the heterostructures synthesized were unaffected by the ZnO incorporated. The photoreduction led to solids with Ag nanoparticles decorating the surface. These materials were tested as photocatalysts for the degradation of several emerging contaminants with different nitrogen-bearing chemical structures under solar light. The catalysts yielded high rates of disappearance of the starting pollutants and showed quite stable performance upon successive applications. |
topic |
ZnO-TiO2/delaminated montmorillonite heterostructures Ag-coating solar photocatalytic activity water purification |
url |
https://www.mdpi.com/1996-1944/10/8/960 |
work_keys_str_mv |
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