Sol-Gel Incorporation of Organometallic Compounds Into Silica: Useful Precursors to Metallic Nanostructured Materials

Abstract

Inclusion of the organometallic MLn = [HOC 5 afford the gels (MLn)(SiO 2 ) n . The inorganic-organic hybrid nanocomposites were pyrolyzed under air at 800°C to give nanostructured metal oxides and/or metal pyrophosphates (phosphates) included in the silica matrices. The morphology of the monolithic nanocomposites exhibited a strong dependence on the gel precursor used being mainly laminar for those prepared using N 3 P 3 {NH[CH 2 ] 3 Si[OEt] 3 } as gelator. TEM images show different shape and size such as circular nanoparticles, nanocables and agglomerates in some cases with sizes of 20 nm for the circular nanostructures, and diameter about 25 nm for the nanocables.

Loading of Silver (I) Ion in L-Cysteine-Functionalized Silica Gel Material for Aquatic Purification

“…It is known in the literature; silver ions can be found in several materials such as polyurethanes modified by carbamide or amino groups [12], poly(aniline-co-5-sulfo-2-anisidine) nano sorbents [13], Na-exchanged clinoptilolite [14], coconut fiber [15], a Gels 2023, 9, 865 2 of 19 copolymer of 1-vinyl-1,2,4-triazole with acrylonitrile [16], bentonite clays [17], and mesoporous silica with dendrimer amines [18], N-(2-(2-pyridyl)ethyl)chitosan against [19], sulfonated calix [4]arene [20], O-carboxymethyl chitosan beads grafted with thioureaglutaraldehyde [21], thiourea-immobilized polystyrene nanoparticles [22], amino-carbamate moiety [23], thiourea-grafted polymeric resin [24], poly(hexamethylene guanidine) [25], dithiooxamidated polysiloxane [26], dimercaptotriazine functionalized silica [27], silica surface hydrosol [28], modified mesoporous silica microcubes [29], and amino-functionalized nanoporous silicas [30].…”