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Graphite oxide silylated by 3-aminopropylmethyldiethoxysilane was used an adsorbent of formaldehyde from gas phase at low concentration. The amount of formaldehyde adsorbed on this adsorbent was much higher than that on activated carbon, even when water molecules are preadsorbed. The utility of the amino groups seemed to be higher for the sample with lower contents of organic component between the...
Graphite oxide was silylated by 3-aminopropylethoxysilanes under various reaction conditions. Two types of layered materials were obtained when 3-aminopropyltriethoxysilane was reacted with graphite oxide. One obtained at lower temperatures was 3-aminopropyltriethoxysilane-intercalated graphite oxide with an interlayer spacing of 1.27nm, in which amino groups of 3-aminopropyltriethoxysilane were bonded...
Graphite oxide was silylated by various alkylchlorosilanes in the presence of butylamine and toluene, and new intercalation compounds were obtained. The silylating reagents with two or three chlorine atoms at silicon in them reacted with graphite oxide, while no reaction occurred when silylating reagents with only one chlorine atom was used. The silylating reagent mainly reacted with hydroxyl group...
Adsorption properties of graphite oxides hydrophobized by n-hexadecylamine, (C16) x GO, were investigated using pyrene molecules as a model of nonionic organic contaminants. A large quantity of pyrene (28.5 mg/g) was adsorbed from a water-ethanol mixture (1:2) containing 2 mM of pyrene when (C16) 0.6 GO was used. The isotherm of pyrene adsorption was better described by Freundlich...
Various quaternary alkylammonium or alkylpyridinium ion–graphite oxide (GO) intercalation compounds were synthesized. The maximum saturated amount of intercalated surfactant ions into GO was 560 mequiv/100 g GO (0.56 mol/100 g GO) which was much larger than those observed for surfactant–clay compounds and it decreased with the decrease in alkyl chain length. The IR spectrum of surfactant-intercalated...
Poly(ethylene oxide)-intercalated graphite oxides (PEO-intercalated GOs) with two differentc -axis repeat distances have been synthesized and characterized in detail. IR spectra and X-ray diffraction patterns obtained at various temperatures of PEO-intercalated GO samples with two different I c values suggest that the conformation of the intercalated PEO is gauche in both PEO-intercalated...
Fluorine-graphite intercalation compounds have been synthesized using high purity fluorine gas and high oxidation-state transition-metal fluorides, AgF 3 and NiF 3 , at room temperature and at -78°C. At room temperature, a mixture of stage 1+2-4 compounds with compositions, C 4.2 F to C 14.6 F were obtained. On the other hand, stage 2-4 compounds...
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