Graphite Oxide-Intercalated Anionic Clay and Its Decomposition to Graphene−Inorganic Material Nanocomposites

Abstract

A graphite oxide-intercalated anionic clay (nickel zinc hydroxysalt) has been prepared using the aqueous colloidal dispersions of negatively charged graphite oxide sheets and aminobenzoate-intercalated anionic clay layers as precursors. When the two colloidal dispersions are reacted, the interlayer aminobenzoate ions are displaced from the anionic clay and the negatively charged graphite oxide sheets are intercalated between the positively charged layers of the anionic clay. The thermal decomposition of the intercalated solid at different temperatures yields graphene-metal oxide/metal nanocomposites. Electron microscopic analysis of the composites indicates that the nanoparticles are intercalated between the layers of graphite in many regions of these solids although the graphite layers are largely exfoliated and not stacked well together.

Dispersion and Exfoliation of Graphene in Rubber by an Ultrasonically‐Assisted Latex Mixing and In situ Reduction Process

“…The presence of the functional groups such as hydroxyl, epoxy, and carboxyl makes GO strongly hydrophilic, which allows GO to readily swell and disperse in water. [16,17] Chemical reduction of GO in colloidal suspensions can be performed to generate bulk quantities of chemically modified GE sheets. [1,7] Microstructure of NRL Containing GE and NR/GE Composites TEM images of NRL containing GE are shown in Figure 6.…”

Preparation and properties of graphene nanosheets–polystyrene nanocomposites via in situ emulsion polymerization

“…Considering the structure of graphite oxide, it is generally accepted that the epoxy and C-OH functional groups are attached above and below each carbon layer (the basal planes), while the -COOH groups are bound to the edges of the basal planes [10,11]. The presence of these functional groups makes graphite oxide strongly hydrophilic, which allows graphite oxide to readily swell and disperse in water [12,13]. With ultrasonic vibration or thermal shock, bulk graphite oxide can be exfoliated into two-dimensional graphene oxide nanosheets [14].…”

Exfoliation of α-hydroxides of nickel and cobalt in water

“…Exfoliation of layered solids has been exploited as a route to nanomaterials [1][2][3] and functional nanocomposites [4][5][6][7][8][9][10]. Exfoliation of layered solids results in colloidal suspensions of solvated monolayers or packets of few layers.…”