Exfoliation and europium(III)-functionalization of α-titanium phosphate via propylamine intercalation: from multilayer assemblies to single nanosheets
Layered α-titanium phosphate intercalated with propylamine, Ti(HPO4)2·2C3H7NH2·H2O (α-TiPPr), has been synthesized by solid-vapour reaction and then exfoliated via a single-stage approach based on overnight stirring in aqueous medium. The obtained nanosheets were then functionalized using solid-liqu...
| Autores: | , , , |
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| Formato: | artículo |
| Fecha de publicación: | 2020 |
| País: | España |
| Recursos: | Universidad de Oviedo (UNIOVI) |
| Repositorio: | RUO. Repositorio Institucional de la Universidad de Oviedo |
| Idioma: | inglés |
| OAI Identifier: | oai:digibuo.uniovi.es:10651/53120 |
| Acesso em linha: | http://hdl.handle.net/10651/53120 https://dx.doi.org/10.1007/s10450-019-00133-2 |
| Access Level: | acceso abierto |
| Palavra-chave: | Titanium phosphate Propylamine Exfoliation Europium Luminescence |
| Resumo: | Layered α-titanium phosphate intercalated with propylamine, Ti(HPO4)2·2C3H7NH2·H2O (α-TiPPr), has been synthesized by solid-vapour reaction and then exfoliated via a single-stage approach based on overnight stirring in aqueous medium. The obtained nanosheets were then functionalized using solid-liquid reaction with europium(III) nitrate aqueous solutions. The obtained materials were characterized by powder X-ray diffraction (PXRD), N2 adsorption-desorption isotherms at 77K, scanning electron microscopy (SEM), transmission electron microscopy (TEM, SAED, STEM-EDX), atomic force microscopy (AFM) and photoluminescence spectroscopy (PL). The europium(III) sorption takes place via two distinct pathways, the first is the previously reported C3H7NH3+/[Eu(H2O)6]3+ ion-exchange process into the titanium-phosphate interlayer space of the multilayered α-TiPPr. The second pathway is the self-assembly of single-sheets which is provoked by electrostatic interactions between the negatively charged titanium-phosphate sheets and the Eu(III)-aqueous cations, leading to the formation of layered ultra-nanoparticles. |
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