Synthesis of mesoporous silica grafted with 3-glycidoxypropyltrimethoxy–silane

Metal ion adsorption using polyamine-functionalized mesoporous materials prepared from bromopropyl-functionalized mesoporous silica

“…Also the sample after the first silanization steps shows relative intensity ratios for T 1 :T 2 :T 3 close to 1.0:11.6:6.1 while after the second silanization step, these change to 0.0:1.0:1.6. These NMR results reveal that the silanol groups on the OSU-6-W surfaces are highly accessible to the 3-bromopropyltrichlorosilane reagent in keeping with what was observed using other silylating reagents [13].…”

“…Acetate solutions were prepared using hydrochloric acid/sodium acetate for pH 2-4, acetic acid/sodium acetate (buffer for pH [4][5][6], and acetic acid/NaOH for pH 6.5-8.0. The mesoporous silica used as the starting material (OSU-6-W) was synthesized using the procedure reported in our previously published paper [13].…”

“…Solid-state 13 C and 29 Si NMR spectra were obtained with a Chemagnetics CMX-II 300 MHZ solid-state NMR spectrometer. The experimental details for these measurements were published previously [13].Metal concentrations were measured using either by UV-Visible spectrophotometer or by inductively-coupled plasma atomic emission spectroscopy. UV-Visible spectra were recorded on a Perkin Elmer (Lambda EZ 201) spectrometer in the range from 200 to 800 nm, while the ICP analysis was performed on a Spectro CIROS ICP Spectrometer.…”

“…Applications of mesoporous silicas as heavy metal ion adsorbents have also been reported in the literature [8][9][10]. Functionalized mesoporous silica with a high density of diamino groups and well-defined mesochannels that can enhance the accessibilities of molecules is required to achieve high production when applied as a catalyst [12] and to reach high capacity and selectivity when applied as an adsorbent for harmful heavy metal cations [9,13].…”

A Review: Fundamental Aspects of Silicate Mesoporous Materials

“…Surface functionalized mesoporous materials are of great interest because of their potential applications in various areas such as catalysis, adsorption, chromatography, nanotechnology, metal ion extraction, and imprinting for molecular recognition [12,13,14]. For example, mesoporous silica having thiol groups on the pore surface showed high adsorption efficiency for heavy metals such as Hg, Ag, and Cd ions [80,81].…”