摘要 :
This study presents a green post-grafting method to prepare functional mesoporous silica
materials. In the functionalisation stage, potassium iodide was applied as catalyst, and
ecofriendly ethanol was used as solvent. The optimal...
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This study presents a green post-grafting method to prepare functional mesoporous silica
materials. In the functionalisation stage, potassium iodide was applied as catalyst, and
ecofriendly ethanol was used as solvent. The optimal molecular ratio of the reagent was n
(potassium iodide)/n (3-chloropropyltriethoxysilane)/n (2-mercaptobenzothiazole)51?5 : 1 : 1?5.
The reaction could be completed after reflux for 12 h at 90uC. The resulting materials were
characterised by scanning electron microscopy, X-ray diffraction, nitrogen adsorption–desorption,
Fourier transform infrared spectroscopy and elemental analysis. The results indicate that
the large pore (the maximal size isy8?62 nm) functional mesoporous silica could be prepared by
our improved graft method, which has a high efficiency of 50?63%. The functional mesoporous
silica was applied to adsorb trace amount of heavy metal ions [Hg(II), Pb(II) and Cd(II)]. The
materials exhibit large adsorption capacity and excellent regeneration ability.
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