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Self‐Assembling of Er 2 O 3 –TiO 2 Mixed Oxide Nanoplatelets by a Template‐Free Solvothermal Route
Author(s) -
JuliánLópez Beatriz,
Martos Mónica,
Ulldemolins Natalia,
Odriozola José A.,
Cordoncillo Eloisa,
Escribano Purificación
Publication year - 2009
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200901423
Subject(s) - materials science , mesoporous material , specific surface area , chemical engineering , solvothermal synthesis , nanocrystalline material , oxide , catalysis , nanotechnology , nanoparticle , ceramic , mesoscopic physics , porosity , mixed oxide , thermal decomposition , composite material , organic chemistry , metallurgy , quantum mechanics , engineering , chemistry , physics
An easy solvothermal route has been developed to synthesize the first mesoporous Er 2 O 3 –TiO 2 mixed oxide spherical particles composed of crystalline nanoplatelets, with high surface area and narrow pore size distribution. This synthetic strategy allows the preparation of materials at low temperature with interesting textural properties without the use of surfactants, as well as the control of particle size and shape. TEM and Raman analysis confirm the formation of nanocrystalline Er 2 O 3 –TiO 2 mixed oxide. Mesoscopic ordered porosity is reached through the thermal decomposition of organic moieties during the synthetic process, thus leading to a template‐free methodology that can be extended to other nanostructured materials. High specific surface areas (up to 313 m 2 g −1 ) and narrow pore size distributions are achieved in comparison to the micrometric material synthesized by the traditional sol–gel route. This study opens new perspectives in the development, by solvothermal methodologies, of multifunctional materials for advanced applications by improving the classical pyrochlore properties (magnetization, heat capacity, catalysis, conductivity, etc.). In particular, since catalytic reactions take place on the surface of catalysts, the high surface area of these materials makes them promising candidates for catalysts. Furthermore, their spherical morphology makes them appropriate for advanced technologies in, for instance, ceramic inkjet printers.