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Large-Scale Aerosol-Assisted Synthesis of Thiol-Functionalized Mesoporous Organosilica

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Abstract:

One-step synthesis of functional mesoporous organosilica particles having both ethane fragments and thiol groups are conducted by a spray drying technique using a laboratory-made apparatus. SEM (scanning electron microscope) images reveal that the spray-dried particles maintain spherical morphology regardless of the amount of embedded organic fragments. The compositions of the final products can be stoichiometrically controlled by simply changing the compositions of the initial precursor solutions, as is confirmed by 29Si NMR measurement. From TEM (transmission electron microscope) observation, SAXS (small-angle X-ray scattering) measurement, and N2 adsorption–desorption isotherms, it is proved that mesoporous ordering is well maintained even though a large amount of organic fragments (i.e., Over 40% of silicon atoms are combined with organic fragments) are embedded in the frameworks. The EDS (energy dispersive X-ray spectrometer) mapping and Raman spectra confirms the existence of thiol groups within the spray-dried particles.

Keywords: AEROSOL-ASSISTED SYNTHESIS; MERCURY(II) ION ADSORPTION; MESOPOROUS MATERIALS; STOICHIOMETRIC CONTROL; THIOL GROUPS

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2010.2495

Publication date: September 1, 2010

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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