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  • Roles of trifluoroacetic acid, acetic acid and their salts in the synthesis of helical mesoporous materials

    Author(s)
    Lu, Tao
    Yao, Xiangdong
    Lu, Max Gao Qing
    He, Yinghe
    Griffith University Author(s)
    Yao, Xiangdong
    Year published
    2010
    Metadata
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    Abstract
    Helical mesoporous materials have attracted much attention due to their potential applications in catalysis and chiral recognition. In this paper, we have systematically studied the influence of trifluoroacetic acid, acetic acid and their salts on the synthesis of helical mesoporous materials in the presence of a cationic surfactant cetyltrimethylammonium bromide (CTAB) as a template. Results show that helical mesostructures can be successfully synthesized when CF3COO- anions were used as additives with an additive/CATB molar ratio (R) range of 0.1-0.375 for the CF3COOH/CTAB templating system and a relatively wider R range ...
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    Helical mesoporous materials have attracted much attention due to their potential applications in catalysis and chiral recognition. In this paper, we have systematically studied the influence of trifluoroacetic acid, acetic acid and their salts on the synthesis of helical mesoporous materials in the presence of a cationic surfactant cetyltrimethylammonium bromide (CTAB) as a template. Results show that helical mesostructures can be successfully synthesized when CF3COO- anions were used as additives with an additive/CATB molar ratio (R) range of 0.1-0.375 for the CF3COOH/CTAB templating system and a relatively wider R range of 0.1-0.5 for the CF3COONa/CTAB templating system, which can be attributed to the influence of pH caused by the acid- or salt-form of additives. The pitch sizes of the helical mesostructures can be finely controlled by varying the additive/CTAB ratio. The results indicate that in order to synthesize helical mesostructures in a broad range of additive/CTAB ratios, the perfluorinated salt with a short fluorocarbon chain should be used. Our synthesis strategy can be used for the fabrication of helical mesostructured porous materials with adjustable pore and helical pitch sizes, which are important in their potential applications.
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    Journal Title
    Journal of Porous Materials
    Volume
    17
    Issue
    1
    DOI
    https://doi.org/10.1007/s10934-009-9272-9
    Subject
    Solid state chemistry
    Physical properties of materials
    Physical chemistry
    Materials engineering
    Publication URI
    http://hdl.handle.net/10072/37552
    Collection
    • Journal articles

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