Raúl Sanz
King Juan Carlos University
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Publication
Featured researches published by Raúl Sanz.
Chemical Communications | 2009
D.P. Serrano; Raúl Sanz; Patricia Pizarro; Inés Moreno
A new synthesis route, based on the silanization of zeolitic seeds, has been applied to prepare nanocrystalline TS-1 zeolite with hierarchical porosity, leading to materials exhibiting high catalytic activity in 1-octene epoxidation with organic hydroperoxides as oxidizing agents.
Journal of Materials Chemistry | 2013
Raúl Sanz; Guillermo Calleja; Amaya Arencibia; Eloy S. Sanz-Pérez
A functionalization method based on the impregnation of previously grafted pore-expanded SBA-15 is presented. The combination of tethered and mobile amino groups has led to a synergic effect, yielding samples with CO2 uptakes up to 235 mg CO2 per g (5.34 mmol CO2 per g) at 45 °C and 0.15 bar CO2 and high adsorption efficiencies.
Journal of Materials Chemistry | 2007
David P. Serrano; Guillermo Calleja; Raúl Sanz; Patricia Pizarro
Crystallization of amorphous mesoporous TiO2 synthesized by a surfactant-templated sol–gel route has been investigated by different methods in order to generate materials with photocatalytic properties. Crystallization by hydrothermal treatment is not a convenient alternative, as it leads to a strong reduction of the textural properties due to excessive coalescence of the inorganic framework. A new crystallization route, based on the treatment of m-TiO2 xerogels with acid–ethanol mixtures under reflux, has been investigated. Sulfuric and phosphoric acids cause severe structural and porous damage, whereas nitric and hydrochloric acids lead to the development of TiO2 photocatalysts with convenient textural properties. These last two acids produce the selective crystallization into anatase, the most active phase of titania in photocatalysis, with small nanocrystals being present within the pore walls. The materials so obtained are characterized by exhibiting high surface areas (210–260 m2 g−1), with an important contribution of microporosity and good photocatalytic activity for trichloroethylene degradation in the aqueous phase. In particular, the best balance between the textural and photocatalytic properties was achieved when the crystallization was carried out by treatment with a 0.5 wt% HCl–ethanol mixture.
Chemical Communications | 2004
David P. Serrano; Guillermo Calleja; Raúl Sanz; Patricia Pizarro
A new mild crystallization procedure has been applied after a synthesis route in the presence of a non-ionic surfactant, leading to the preparation of bimodal micro-mesoporous TiO2, with remarkable textural properties and pore walls formed by anatase nanocrystals, which exhibit photocatalytic activity.
RSC Advances | 2015
Eloy S. Sanz-Pérez; Amaya Arencibia; Raúl Sanz; Guillermo Calleja
Among the technologies proposed to reduce greenhouse gas emissions, adsorption with porous solids has been widely studied in the past few years. Herein, up to 30 inorganic porous adsorbents have been studied, obtaining their CO2 uptake at 45 °C and ambient pressure, typical conditions of industrial post-combustion facilities after the desulphurization step. A clear relationship between CO2 adsorption capacity and the combination of surface area (SBET) and sorbent affinity towards gas molecules through C parameter was found. This study provides novel findings that allow the prediction of CO2 uptake in mesostructured silica physisorbents from their textural properties.
Applied Surface Science | 2010
Raúl Sanz; Guillermo Calleja; Amaya Arencibia; Eloy S. Sanz-Pérez
Microporous and Mesoporous Materials | 2012
Raúl Sanz; Guillermo Calleja; Amaya Arencibia; Eloy S. Sanz-Pérez
Dalton Transactions | 2013
Raúl Sanz; Fernando Martínez; Gisela Orcajo; Lukasz Wojtas; David Briones
Journal and Proceedings of the Royal Institute of Chemistry of Great Britain and Ireland | 1947
Raúl Sanz; Fernando Rey Martínez; Gisela Orcajo; Lukasz Wojtas; David Briones
Industrial & Engineering Chemistry Research | 2004
Guillermo Calleja; David P. Serrano; Raúl Sanz; Patricia Pizarro; Ahitana Garcia