Systematische Aufzählung von mikroporösen Festkörpern: auf dem Weg zu Designer‐Katalysatoren

Thomas, John Meurig; Klinowski, Jacek

doi:10.1002/ange.200700666

Cited by 3 publications

(2 citation statements)

References 49 publications

(34 reference statements)

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“…In contrast, the film spreads on the nonpolar side because of the volume of the lipophilic part of the surfactants and the depth of penetration into the nonpolar phase.Asaconsequence,the film is curved to minimize the surface tension. [19] Thep arameter field for MEs becomes even more complex when cosurfactants and/or temperature are introduced into the phase diagram. Cosurfactants can stabilize the film curving and reduce the temperature dependence ( Figure 1b).…”

Section: Complexity Of Microemulsion Systemsmentioning

confidence: 99%

“…Herein, o/w-and w/o-MEs are separated by bicontinous or lyotropic phases.T he latter are themselves highly interesting for obtaining meso-and microporous,h igh-surface materials, but these are not the focus of this Review and are comprehensively summarized elsewhere. [19] Thep arameter field for MEs becomes even more complex when cosurfactants and/or temperature are introduced into the phase diagram. Thec ompilation of such phase diagrams is,a s such, ac hallenge.…”

Section: Complexity Of Microemulsion Systemsmentioning

confidence: 99%

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Microemulsions: Options To Expand the Synthesis of Inorganic Nanoparticles

Wolf

Feldmann

2016

Angew Chem Int Ed

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Microemulsions (MEs) are ideal for obtaining high-quality inorganic nanoparticles. As thermodynamically stable systems with a nanometer-sized droplet phase that serves as a nanoreactor, MEs have obvious advantages for the synthesis of nanoparticles. MEs also have disadvantages, such as their complexity as multicomponent systems, the low amount of obtainable nanoparticles, their limited thermal stability, the fact that hydrolyzable or oxidizable compounds are often excluded from synthesis, the partly elaborate separation of nanoparticles, as well as the removal of surface-adhered surfactants subsequent to synthesis. This Review presents some strategies to further expand the options of ME-based synthesis of inorganic nanoparticles. This comprises the crystallization of nanoparticles in "high-temperature MEs", the synthesis of hollow nanospheres, the use of hydrogen peroxide or liquid ammonia as the polar droplet phase, and the synthesis of base metals and nitrides in MEs.

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Section: Complexity Of Microemulsion Systemsmentioning

confidence: 99%

Section: Complexity Of Microemulsion Systemsmentioning

confidence: 99%

Microemulsions: Options To Expand the Synthesis of Inorganic Nanoparticles

Wolf

Feldmann

2016

Angew Chem Int Ed

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Mikroemulsionen: neue Möglichkeiten zur Erweiterung der Synthese anorganischer Nanopartikel

Wolf

Feldmann

2016

Angewandte Chemie

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Mikroemulsionen (ME) sind ideal, um hochwertige anorganische Nanopartikel zu erhalten. Als thermodynamisch stabile Systeme mit einer Phase aus Nanometer‐großen Tröpfchen, die als Nanoreaktoren dienen, bieten sie für die Nanopartikelsynthese eine Reihe an Vorteilen. ME haben aber auch Nachteile, z. B. ihre Komplexität als Mehrkomponentensysteme, die geringe erhältliche Nanopartikelmenge, die begrenzte thermische Stabilität, der häufige Ausschluss hydrolysierbarer oder oxidierbarer Verbindungen von der Synthese, die partiell sehr aufwendige Abtrennung der Nanopartikel sowie die Entfernung Oberflächen‐gebundener Tenside nach der Synthese. Dieser Aufsatz soll einige Strategien zur Erweiterung der ME‐basierten Synthese anorganischer Nanopartikel aufzeigen. Dazu zählen die Kristallisation von Nanopartikeln mittels “Hochtemperatur‐ME”, die Synthese nanoskaliger Hohlkugeln, die Verwendung von H2O2 oder flüssigem NH3 als polare Tröpfchenphasen sowie die Synthese von unedlen Metallen und Nitriden in ME.

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