Browsing by Autor "J. Latorre"

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    Enhanced manganese content in Mn-MCM-41 mesoporous silicas
    (Springer Science+Business Media, 2005) Jamal El Haskouri; Saúl Cabrera; Aurelio Beltrán; Carmen Guillem; D. Beltrán; J. Latorre; M. Dolores Marcos; Pedro Amorós
    The use of triethanolamine containing complexes of Si and Mn as hydrolytic precursors allows the synthesis of doped mesoporous silicas in which the Mn content can be modulated up to reach a minimum value of the Si/Mn molar ratio of 3. This limit value corresponds to a Mn relative content significantly higher than those reported to date for similar materials (Si/Mn = 6). According to XRD, TEM and porosity data, the mesoporous nature typical of the MCM-41 silicas is retained even for the samples having the highest Mn content.
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    Ordered Mesoporous Silicon Oxynitrides
    (2001) Jamal El Haskouri; Saúl Cabrera; Fernando Sapiña; J. Latorre; Carmen Guillem; Aurelio Beltrán; Aurelio Beltrán; M. Dolores Marcos; Pedro Amorós
    The functionalization of mesostructured and/or mesoporous MCM-41 related silicas is easily achieved by treatment under NH3 atmosphere at relatively low temperatures without structural collapse. Nitridation, which occurs through a single-step solid-state reaction, yields for the first time ordered mesoporous silicon oxynitrides with high surface area (see Figure).