Layered Double Hydroxide Surface Modified with (3‐aminopropyl)triethoxysilane by Covalent Bonding

Abstract

Interlayer surfaces of layered double hydroxide (LDH) have been functionalized with amine moieties by condensation between the hydroxyl groups and (3‐aminopropyl)triethoxysilane (APS) molecules via the covalent oxane bonds M‐O‐Si (M=Zn and Cr) (see Figure). Since the galleries of the modified LDHs have a hydrophobic field, various functional molecules such as enzymes, catalysts, and organic molecules can be incorporated between the LDH layers.

Silylation of montmorillonite surfaces: Dependence on solvent nature

“…T n notations (n = 0, 1, 2, and 3, which represents the number of bridge ''O'' atoms surrounding the silicon atom) were used to describe the different kinds of siloxane bonds formed between APTES and montmorillonite and among APTES molecules [11,[34][35][36]. As shown in Fig.…”

“…The methods used for modifying clay minerals mainly include exchange of the inherent interlayer cations with cationic surfactants [8,9], grafting clay minerals surfaces with silanes [10][11][12], and using silanes as silicon source in the synthesis of clay minerals [13,14]. Silane grafting, also known as silylation, was proven to be an efficient method to modify clay minerals surfaces.…”

Synthesis and Crystallization of Monodisperse Spherical Colloids of Amorphous Selenium

“…The first step involved the preparation of Pt nanoparticles by reducing hydrogen hexachloroplatinate (H 2 PtCl 6 , Aldrich) with ethylene glycol [17]. In a typical procedure, 0.5 g of poly(vinyl pyrrolidone) (PVP, Aldrich, weight-average molec- Figure 4.…”

“…In this case, hydrogen hexachloroplatinate (H 2 PtCl 6 ) was reduced by ethylene glycol within the voids of an opaline lattice of a-Se colloids. [17] In order to prevent the a-Se colloids from shape deformation and coalescence at elevated temperatures, the sample was immersed in an ethylene glycol dispersion of Pt nanoparticles (2±3 nm in diameter) at room temperature and then washed with deionized water. The Pt nanoparticles could be successfully deposited on the surface of each a-Se colloid, as evidenced from the SEM image shown in Figure 4A.…”

Tailoring surface properties and structure of layered double hydroxides using silanes with different number of functional groups

“…This implies that the number of functional groups in the used silane has a significant effect on the structure and property of the silylated products. More interestingly, Mochizuki et al [12] successfully developed a novel method for constructing molecularly ordered silica nanostructures with two dimensional and three dimensional networks, involving silylation of a layered silicate octosilicate with alkoxytrichlorosilanes and subsequent reaction [20]. Shortly afterwards, Wypych et al successfully synthesized the single-layer LDH silylated products [21].…”