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Search for "mesoporous silica" in Full Text gives 57 result(s) in Beilstein Journal of Nanotechnology.

Controlled synthesis and tunable properties of ultrathin silica nanotubes through spontaneous polycondensation on polyamine fibrils

  • Jian-Jun Yuan,
  • Pei-Xin Zhu,
  • Daisuke Noda and
  • Ren-Hua Jin

Beilstein J. Nanotechnol. 2013, 4, 793–804, doi:10.3762/bjnano.4.90

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  • 3.5 nm, which corresponds to the hollow inner of nanotube (Figure 2B) [38][39], which is in good agreement with the TEM observations (Figure 1C). This BET result indicates that our silica nanotubes have an excellent thermal stability compared to the conventional mesoporous silica (i.e., M41S), which
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Published 25 Nov 2013

Functionalization of vertically aligned carbon nanotubes

  • Eloise Van Hooijdonk,
  • Carla Bittencourt,
  • Rony Snyders and
  • Jean-François Colomer

Beilstein J. Nanotechnol. 2013, 4, 129–152, doi:10.3762/bjnano.4.14

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  • aligned CNTs from acetylene chemical vapor deposition (CVD) catalyzed by iron nanoparticles embedded in mesoporous silica. In that work, the growth direction of not very straight, entangled-CNTs was related to the direction of the pores in the silica substrate, being perpendicular to the substrate surface
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Published 22 Feb 2013

Distribution of functional groups in periodic mesoporous organosilica materials studied by small-angle neutron scattering with in situ adsorption of nitrogen

  • Monir Sharifi,
  • Dirk Wallacher and
  • Michael Wark

Beilstein J. Nanotechnol. 2012, 3, 428–437, doi:10.3762/bjnano.3.49

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  • order to determine the structure, surface area and functionalities of the inorganic–organic materials. In addition inverse gas chromatography is quite often used to measure retention volumes in mesoporous silica gels or dispersive surface energies in glasses, for example [16][17]. However, these
  • generated H2 from the simultaneously formed O2 [31][32]. Based on functionalized mesoporous silica (e.g., Si-MCM-41-SO3H) and different polymer materials (e.g., Nafion® or polysiloxanes) such hybrid membranes have already been realized [28][29]; PMOs, however, may be superior compared to MCM-41 due to their
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Published 30 May 2012

Inorganic–organic hybrid materials through post-synthesis modification: Impact of the treatment with azides on the mesopore structure

  • Miriam Keppeler,
  • Jürgen Holzbock,
  • Johanna Akbarzadeh,
  • Herwig Peterlik and
  • Nicola Hüsing

Beilstein J. Nanotechnol. 2011, 2, 486–498, doi:10.3762/bjnano.2.52

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  • a minimal pressure build-up the presence of a macroporous network is indispensable. Such a second level of porosity in mesoporous silica monoliths can be introduced by several synthetic approaches: Dual templating with sacrificial templates, phase separation processes (e.g., based on polymers), or
  • 100 °C in an autoclave yields mesoporous silica gels with larger pore sizes and pore volumes compared to gels aged in ethanol at room temperature due to promoted dissolution and reprecipitation processes [20]. Processes such as syneresis, Ostwald ripening, etc., are facilitated and accelerated with
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Published 26 Aug 2011

Novel acridone-modified MCM-41 type silica: Synthesis, characterization and fluorescence tuning

  • Maximilian Hemgesberg,
  • Gunder Dörr,
  • Yvonne Schmitt,
  • Andreas Seifert,
  • Zhou Zhou,
  • Robin Klupp Taylor,
  • Sarah Bay,
  • Stefan Ernst,
  • Markus Gerhards,
  • Thomas J. J. Müller and
  • Werner R. Thiel

Beilstein J. Nanotechnol. 2011, 2, 284–292, doi:10.3762/bjnano.2.33

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  • Erlangern, Germany Heinrich-Heine-Universität Düsseldorf, Institut für Organische Chemie und Makromolekulare Chemie, Universitätsstraße 1, D-40225 Düsseldorf, Germany 10.3762/bjnano.2.33 Abstract A Mobil Composition of Matter (MCM)-41 type mesoporous silica material containing N-propylacridone groups has
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Published 09 Jun 2011

Pore structure and surface area of silica SBA-15: influence of washing and scale-up

  • Jörg P. Thielemann,
  • Frank Girgsdies,
  • Robert Schlögl and
  • Christian Hess

Beilstein J. Nanotechnol. 2011, 2, 110–118, doi:10.3762/bjnano.2.13

Graphical Abstract
  • larger batch sizes the influence of the quantity of solvent on the quality of the SBA-15 is reduced. Keywords: SBA-15; scale-up; silica mesoporous material; tensile strength effect; washing; Introduction SBA-15 is a mesoporous silica sieve based on uniform hexagonal pores with a narrow pore size
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Published 16 Feb 2011

Synthesis of LiNbO3 nanoparticles in a mesoporous matrix

  • Anett Grigas and
  • Stefan Kaskel

Beilstein J. Nanotechnol. 2011, 2, 28–33, doi:10.3762/bjnano.2.3

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  • impregnation from the metal precursor and mesoporous silica SBA-15 as the template. A rapid one-step treatment in an IR furnace reduces the preparation time to only 10 min. In comparison, a conventional furnace requires 5 h reaction time to produce nanoparticles with similar textural properties. Another
  • present work, we investigated a rapid and efficient one-step route for the direct IR-accelerated synthesis of LiNbO3 nanopowders using an ordered mesoporous silica SBA-15 as the template, in combination with an IR furnace for the crystallization. The matrix stabilizes the nanoparticles against sintering
  • crystallites in the template was minimized. The determination of particle size, as calculated from the Scherrer equation, leads to a value of about 10 nm which corresponds well with the pore diameter of the ordered mesoporous silica SBA-15 (10.5 nm in diameter), verifying that the mesoporous silica is a useful
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Published 10 Jan 2011
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