Preparation of carbonaceous gel beads

Tateishi, D.; Esumi, Kunio; Honda, Hidemasa; Oda, Hirokazu

doi:10.1016/0008-6223(92)90019-s

Cited by 19 publications

(5 citation statements)

References 6 publications

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“…Because of the introduction of acid groups on CNTs, the solubility and dispersion state of CNTs in an alkali solution would be greatly enhanced, which is the main reason why we choose ammonia water as the dispersion medium. In 1992, Tateishi et al have even reported the preparation of carbon microbeads using the modified coke with amphiphilic property via a W/O emulsion process without any other surfactant.…”

Section: Resultsmentioning

confidence: 99%

Carbon Nanotube Capsules Self-Assembled by W/O Emulsion Technique

Song

Chen

2007

Langmuir

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Carbon nanotube capsules (CNCs) with the diameter of 5-10 microm were fabricated from acid-modified multiwalled carbon nanotubes (CNTs) using water-in-oil (W/O) emulsion technique. The effects of the content of CNTs in water, the extent of acid treatment, and the length of CNTs used on the formation and morphology of CNCs were investigated. It was found that the amount of CNTs in water and the length of CNTs are the crucial factors for the formation of carbon nanotube capsules.

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Section: Resultsmentioning

confidence: 99%

Carbon Nanotube Capsules Self-Assembled by W/O Emulsion Technique

Song

Chen

2007

Langmuir

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“…The flexibility of the imprinting method allows one to control the particle size and shape by using pitch precursors of proper size and shape. Spherical carbon particles of ∼3 to 5 μm can be prepared using mesophase pitch microbeads. , This kind of microbeads has a spherical shape and a small size of 0.5−20 μm, depending on the preparation conditions. As pointed out earlier, the shape of the surface-imprinted carbon particles is predetermined by the precursor.…”

Section: Resultsmentioning

confidence: 99%

Colloid-Imprinted Carbons as Stationary Phases for Reversed-Phase Liquid Chromatography

Jaroniec

2004

Anal. Chem.

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A novel colloid-imprinting method is employed for the preparation of carbonaceous stationary phases for reversed-phase liquid chromatography (RPLC). This colloid-imprinting method combined with oxidative stabilization treatment affords carbons with a porous shell/nonporous core structure. The particle morphology, pore size, pore shape, and Brunauer-Emmett-Teller surface area of these carbons can be finely tuned by selecting proper experimental conditions. Although their surface area and pore volume decrease noticeably after graphitization, their primary pore structure is maintained. In addition, the graphitization process eliminates the high-energy sites and substantially reduces structural heterogeneity, making colloid-imprinted carbons attractive stationary phases for reversed-phase liquid chromatography. The colloid-imprinted graphitic carbons with surface mesoporosity appeared to be attractive for chromatographic separations of alkylbenzenes under reversed-phase conditions.

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“…The coke was prepared around 500 • C in a delayed coker. ACM was synthesized by oxidation of raw NC with a mixture of concentrated nitric acid and sulfuric acid (v/v = 3/7) and details have been described in earlier reports [17]. A schematic flowchart for ACM preparation is shown in Fig.…”

Section: Preparation and Characterization Of Samplesmentioning

confidence: 99%

“…The resultant ACM showed widened d 002 , and could be dissolved in alkaline aqueous solutions [17][18][19][20]. Moreover, to study the activation mechanism of ACM, elemental composition and chemical bonds information are extremely important.…”

Section: Xps Analysis Of Acmmentioning

confidence: 99%