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Magnesium Hydroxide Fluorides – New Materials with Adjustable Composition and Properties

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Abstract

Fluorolytic sol–gel synthesis with aqueous HF results in highly disordered, nanoscopic magnesium hydroxide fluorides with very large BET surface areas, low carbon contents, and adjustable stoichiometries. MgFx(OH)(2–x) materials that can withstand high temperatures can be synthesized in a very wide stoichiometric range by fluorolytic sol–gel synthesis (0 ≤ x ≤ 2). Large surface areas and a very wide range of tunable acid–base properties are characteristic for these compounds, which opens an exciting possibility of their application not only as new catalysts but also as support materials.

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