期刊
LANGMUIR
卷 37, 期 8, 页码 2780-2786出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.0c03541
关键词
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资金
- Shanghai Science and Technology Foundation [19JC1412100]
- Australian Research Council
- Australian National Fabrication Facility-Queensland Node (ANFF)
- East China Normal University
A new acid-catalysis method has been developed to effectively achieve postmodification of large-pore mesoporous silica nanoparticles, allowing for controllable organic contents and retained large pore sizes. This strategy can also be applied to postmodification of organosilica precursors with different functions.
Surface functionalization of mesoporous silica nanoparticles is important for their applications but fairly challenging using benzene-bridged organosilane as the precursor through the postsynthesis approach. Herein, we report an acid-catalysis approach for the postmodification of benzene-bridged organosilica onto the surface of large-pore mesoporous silica nanoparticles. By using HCl (similar to 1 M) as the acid catalyst in a tetrahydrofuran solvent, the self-assembly of the bridged organosilica precursor is avoided, while surface modification of mesoporous silica nanoparticles is promoted with controllable organic contents and retained large pore sizes. This strategy can also be applied to the postmodification of organosilica with end benzene groups. The strategy developed in this study is expected to be applied for the postmodification of other organosilica precursors with various functions.
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