Solvothermal Synthesis, Gas-Sensing Properties, and Solar Cell-Aided Investigation of TiO2-MoOx Nanocrystals
Titania anatase nanocrystals were prepared by sol-gel/solvothermal synthesis in oleic acid at 250 °C, and modified by co-reaction with Mo chloroalkoxide, aimed at investigating the effects on gas-sensing properties induced by tailored nanocrystals surface modification with ultra-thin layers of MoO s...
| Autores: | , , , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2017 |
| País: | España |
| Institución: | Universitat Autònoma de Barcelona |
| Repositorio: | Dipòsit Digital de Documents de la UAB |
| Idioma: | inglés |
| OAI Identifier: | oai:ddd.uab.cat:216218 |
| Acceso en línea: | https://ddd.uab.cat/record/216218 https://dx.doi.org/urn:doi:10.1002/cnma.201700160 |
| Access Level: | acceso abierto |
| Palabra clave: | Nanocrystals Nanomaterials Sensors Solar cells Surface chemistry |
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Solvothermal Synthesis, Gas-Sensing Properties, and Solar Cell-Aided Investigation of TiO2-MoOx NanocrystalsEpifani, Mauro|||0000-0002-9242-6484Kaciulis, Saulius|||0000-0002-9868-7626Mezzi, Alessio|||0000-0002-2887-520XAltamura, Davide|||0000-0003-2597-4883Giannini, Cinzia|||0000-0003-0983-2885Tang, PengYi|||0000-0002-2306-095XMorante, Joan Ramon|||0000-0002-4981-4633Arbiol i Cobos, Jordi|||0000-0002-0695-1726Siciliano, Pietro|||0000-0001-9748-0925Comini, Elisabetta|||0000-0003-2559-5197Concina, IsabellaNanocrystalsNanomaterialsSensorsSolar cellsSurface chemistryTitania anatase nanocrystals were prepared by sol-gel/solvothermal synthesis in oleic acid at 250 °C, and modified by co-reaction with Mo chloroalkoxide, aimed at investigating the effects on gas-sensing properties induced by tailored nanocrystals surface modification with ultra-thin layers of MoO species. For the lowest Mo concentration, only anatase nanocrystals were obtained, surface modified by a disordered ultra-thin layer of mainly octahedral Mo oxide species. For larger Mo concentrations, early MoO phase segregation occurred. Upon heat treatment up to 500 °C, the sample with the lowest Mo concentration did not feature any Mo oxide phase segregation, and the surface Mo layer was converted to dense octahedral Mo oxide. At larger Mo concentrations all segregated MoO was converted to MoO. The two different materials typologies, depending on the Mo concentration, were used for processing gas-sensing devices and tested toward acetone and carbon monoxide, which gave a greatly enhanced response, for all Mo concentrations, to acetone (two orders of magnitude) and carbon monoxide with respect to pure TiO. For the lowest Mo concentration, dye-sensitized solar cells were also prepared to investigate the influence of anatase surface modification on the electrical transport properties, which showed that the charge transport mainly occurred in the ultra-thin MoO surface layer. 22017-01-0120172017-01-01Articlehttp://purl.org/coar/resource_type/c_6501SMURhttp://purl.org/coar/version/c_71e4c1898caa6e32info:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/216218https://dx.doi.org/urn:doi:10.1002/cnma.201700160reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengAgència de Gestió d'Ajuts Universitaris i de Recerca https://doi.org/10.13039/501100003030 2014/SGR-1638Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 MAT2014-59961-C2-2-RMinisterio de Economía y Competitividad https://doi.org/10.13039/501100003329 SEV-2013-0295open accesshttp://purl.org/coar/access_right/c_abf2Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.https://rightsstatements.org/vocab/InC/1.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:2162182026-06-06T12:50:31Z |
| dc.title.none.fl_str_mv |
Solvothermal Synthesis, Gas-Sensing Properties, and Solar Cell-Aided Investigation of TiO2-MoOx Nanocrystals |
| title |
Solvothermal Synthesis, Gas-Sensing Properties, and Solar Cell-Aided Investigation of TiO2-MoOx Nanocrystals |
| spellingShingle |
Solvothermal Synthesis, Gas-Sensing Properties, and Solar Cell-Aided Investigation of TiO2-MoOx Nanocrystals Epifani, Mauro|||0000-0002-9242-6484 Nanocrystals Nanomaterials Sensors Solar cells Surface chemistry |
| title_short |
Solvothermal Synthesis, Gas-Sensing Properties, and Solar Cell-Aided Investigation of TiO2-MoOx Nanocrystals |
| title_full |
Solvothermal Synthesis, Gas-Sensing Properties, and Solar Cell-Aided Investigation of TiO2-MoOx Nanocrystals |
| title_fullStr |
Solvothermal Synthesis, Gas-Sensing Properties, and Solar Cell-Aided Investigation of TiO2-MoOx Nanocrystals |
| title_full_unstemmed |
Solvothermal Synthesis, Gas-Sensing Properties, and Solar Cell-Aided Investigation of TiO2-MoOx Nanocrystals |
| title_sort |
Solvothermal Synthesis, Gas-Sensing Properties, and Solar Cell-Aided Investigation of TiO2-MoOx Nanocrystals |
| dc.creator.none.fl_str_mv |
Epifani, Mauro|||0000-0002-9242-6484 Kaciulis, Saulius|||0000-0002-9868-7626 Mezzi, Alessio|||0000-0002-2887-520X Altamura, Davide|||0000-0003-2597-4883 Giannini, Cinzia|||0000-0003-0983-2885 Tang, PengYi|||0000-0002-2306-095X Morante, Joan Ramon|||0000-0002-4981-4633 Arbiol i Cobos, Jordi|||0000-0002-0695-1726 Siciliano, Pietro|||0000-0001-9748-0925 Comini, Elisabetta|||0000-0003-2559-5197 Concina, Isabella |
| author |
Epifani, Mauro|||0000-0002-9242-6484 |
| author_facet |
Epifani, Mauro|||0000-0002-9242-6484 Kaciulis, Saulius|||0000-0002-9868-7626 Mezzi, Alessio|||0000-0002-2887-520X Altamura, Davide|||0000-0003-2597-4883 Giannini, Cinzia|||0000-0003-0983-2885 Tang, PengYi|||0000-0002-2306-095X Morante, Joan Ramon|||0000-0002-4981-4633 Arbiol i Cobos, Jordi|||0000-0002-0695-1726 Siciliano, Pietro|||0000-0001-9748-0925 Comini, Elisabetta|||0000-0003-2559-5197 Concina, Isabella |
| author_role |
author |
| author2 |
Kaciulis, Saulius|||0000-0002-9868-7626 Mezzi, Alessio|||0000-0002-2887-520X Altamura, Davide|||0000-0003-2597-4883 Giannini, Cinzia|||0000-0003-0983-2885 Tang, PengYi|||0000-0002-2306-095X Morante, Joan Ramon|||0000-0002-4981-4633 Arbiol i Cobos, Jordi|||0000-0002-0695-1726 Siciliano, Pietro|||0000-0001-9748-0925 Comini, Elisabetta|||0000-0003-2559-5197 Concina, Isabella |
| author2_role |
author author author author author author author author author author |
| dc.subject.none.fl_str_mv |
Nanocrystals Nanomaterials Sensors Solar cells Surface chemistry |
| topic |
Nanocrystals Nanomaterials Sensors Solar cells Surface chemistry |
| description |
Titania anatase nanocrystals were prepared by sol-gel/solvothermal synthesis in oleic acid at 250 °C, and modified by co-reaction with Mo chloroalkoxide, aimed at investigating the effects on gas-sensing properties induced by tailored nanocrystals surface modification with ultra-thin layers of MoO species. For the lowest Mo concentration, only anatase nanocrystals were obtained, surface modified by a disordered ultra-thin layer of mainly octahedral Mo oxide species. For larger Mo concentrations, early MoO phase segregation occurred. Upon heat treatment up to 500 °C, the sample with the lowest Mo concentration did not feature any Mo oxide phase segregation, and the surface Mo layer was converted to dense octahedral Mo oxide. At larger Mo concentrations all segregated MoO was converted to MoO. The two different materials typologies, depending on the Mo concentration, were used for processing gas-sensing devices and tested toward acetone and carbon monoxide, which gave a greatly enhanced response, for all Mo concentrations, to acetone (two orders of magnitude) and carbon monoxide with respect to pure TiO. For the lowest Mo concentration, dye-sensitized solar cells were also prepared to investigate the influence of anatase surface modification on the electrical transport properties, which showed that the charge transport mainly occurred in the ultra-thin MoO surface layer. |
| publishDate |
2017 |
| dc.date.none.fl_str_mv |
2 2017-01-01 2017 2017-01-01 |
| dc.type.none.fl_str_mv |
Article http://purl.org/coar/resource_type/c_6501 SMUR http://purl.org/coar/version/c_71e4c1898caa6e32 |
| dc.type.openaire.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| dc.identifier.none.fl_str_mv |
https://ddd.uab.cat/record/216218 https://dx.doi.org/urn:doi:10.1002/cnma.201700160 |
| url |
https://ddd.uab.cat/record/216218 https://dx.doi.org/urn:doi:10.1002/cnma.201700160 |
| dc.language.none.fl_str_mv |
Inglés eng |
| language_invalid_str_mv |
Inglés |
| language |
eng |
| dc.relation.none.fl_str_mv |
Agència de Gestió d'Ajuts Universitaris i de Recerca https://doi.org/10.13039/501100003030 2014/SGR-1638 Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 MAT2014-59961-C2-2-R Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 SEV-2013-0295 |
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open access http://purl.org/coar/access_right/c_abf2 https://rightsstatements.org/vocab/InC/1.0/ |
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info:eu-repo/semantics/openAccess |
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open access http://purl.org/coar/access_right/c_abf2 https://rightsstatements.org/vocab/InC/1.0/ |
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openAccess |
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application/pdf |
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reponame:Dipòsit Digital de Documents de la UAB instname:Universitat Autònoma de Barcelona |
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