Abstract
We describe a new and direct route to obtain Al-SBA-15-modified materials with different groups on their surface using diazonium salts. For comparison, modification using surfactants was also used. In the present study, we decided to examine the applicability of these materials in the adsorption of compounds released from dental fillings. The effectiveness of modification was proved by results of Fourier transform infrared spectroscopy and energy-dispersive spectrometry. The results indicate the formation of characteristic groups on the surface of the materials. The materials after modification are characterized by smaller surface area and pore volume, which is result of covering the surface with an aryl or surfactant layer. The adsorption properties change after modification and depend on the used modifier. Diazonium modification has a positive effect on sorptive properties when hydroxyl and dimethylamine groups are obtained. The methods of material modification presented in this work may in the future lead to the improvement in the properties of sorbents used in solid-phase extraction.
Highlights
Ordered mesoporous materials were first reported in the 1990s
The methods of material modification presented in this work may in the future lead to the improvement of the properties of sorbents used in solid-phase extraction
The starting material was modified using diazonium salts and surfactants, while the effectiveness of material modification was proved by the results of Fourier transform infrared spectroscopy and energy-dispersive spectrometry
Summary
Ordered mesoporous materials were first reported in the 1990s. These materials are characterized by high surface area, pore volume and the ordering of pores with diameter in the mesopore range (2.0–10.0 nm) (Gomez-Cazalilla et al 2007; Zeng et al 2005). We report a new and direct route to obtain Al-SBA-15-modified materials with different groups on their surface using diazonium salts. The methods of material modification presented in this work may in the future lead to the improvement of the properties of sorbents used in solid-phase extraction.
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