Sol–gel prepared nanoscopic metal fluorides – a new class of tunable acid–base catalysts

Wuttke, Stefan; Coman, Simona M.; Kröhnert, Jutta; Jentoft, Friederike C.; Kemnitz, Erhard

doi:10.1016/j.cattod.2009.10.008

Cited by 47 publications

(43 citation statements)

References 44 publications

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“…The synthesis of nanoscopic metal fluorides with high surface area has simulated considerable attention, since it is well known that these materials are very attractive for a wide range of applications such as anti-reflective coatings [1], high-performance ceramics [2] and heterogeneous catalysis [3]. The fluorolytic sol-gel synthesis has been recognised to be a powerful route for high surface area metal fluorides [4] that exhibit fundamentally distinct properties in comparison to classically prepared metal fluorides.…”

Section: Introductionmentioning

confidence: 99%

A computational study of the structure of zinc fluoride surfaces

Kaawar¹,

Paulus²

2015

AIP Conference Proceedings

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(2015) At the request of the authors of the paper, an updated version of this article was published on 6 January 2016. The original article supplied to AIP Publishing was not the final version and contained an error in Table 2. The error has been corrected in the updated and re-published article. kaawarzeinab@zedat.fu-berlin.de A Computational Study of the Structure of Zinc Fluoride SurfacesAbstract. First-principle calculations based on density functional theory were used to investigate the stability and the shape of ZnF2 crystals in vacuum. We present and discuss the results of calculations of the ZnF2 bulk and surface structure, in the rutile and CaCl2 modifications. According to our bulk calculations, the rutile and the CaCl2 structures have similar lattice parameters and bulk energy. The surface energies calculated, as well as the relative stability of the surfaces are the same for both structures.

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Section: Introductionmentioning

confidence: 99%

A computational study of the structure of zinc fluoride surfaces

Kaawar¹,

Paulus²

2015

AIP Conference Proceedings

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“…Precursor in this synthesis is magnesium nitrate hexahydrate (Mg(NO3)2·6H2O) as a source of Mg 2+ cations, hydrofluoric acid (HF) as a source of anions F -, ethanol as a gelating agent and the source alkoxy. The synthesis process of MgF2 by sol-gel method, there are two stages through [19], [20]. The first stage is the formation of metal alkoxides of metal precursors with gelating agent.…”

Section: Catalysts Properties and Surface Aciditymentioning

confidence: 99%

Glycerol Acetylation Using Magnesium Fluoride Catalyst to Produced DAG and TAG

A’yuni

Akhlus

Setyawati

et al. 2017

IJPS

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Glycerol acetylation with acetic acid using magnesium fluoride catalyst have been investigated. Magnesium fluoride catalyst was prepared by sol-gel method with ethanol as gelating agent. The glycerol acetylation produced monoacetylglyceride (MAG), diacetylglyceride (DAG) and triacetylglyceride (TAG). The catalytic reaction carried out by thermal methods reflux under ambient conditions. The influence of reaction conditions such as the reaction time on the product distribution was investigated. The optimum of glycerol conversion was achieved at 5 hours of reaction time by 78.34% with selectivity of 30, 62 and 8% for MAG, DAG and TAG respectively. The reaction route over magnesium fluorides was observed by product as reactants, gradually. The results showed that the acetylation reaction of glycerol occurs via a parallel route to the first, followed by the consecutive route to produce DAG and TAG.

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“…Earlier employed mainly as support for catalysts due to their rather low activity [1], focus has moved in the recent years toward application of magnesium fluoride as the catalytically active species [2][3][4][5]. The breakthrough came with the development of hydrolytic-fluorolytic sol-gel synthesis for highsurface metal fluorides [6].…”

Section: Introductionmentioning

confidence: 99%