Nanoporous carbon materials obtained by sucrose carbonization in the presence of KOH

Armandi, Marco; Bonelli, Barbara; Geobaldo, Francesco; Garrone, Edoardo

doi:10.1016/j.micromeso.2010.03.021

Cited by 116 publications

(54 citation statements)

References 40 publications

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“…Therefore, thermolysis of mono- or disaccharides results in the formation of polyaromatic compounds, whose condensation gives graphene clusters. Among simple carbohydrates, saccharose is frequently used as a char precursor [13–25, 33–35]. Mono- and disaccharides are characterized by tautomerism and diastereoisomerism, e.g., besides chain-cyclic tautomerism of glucose, there are eight pairs of its diastereomers.…”

Section: Introductionmentioning

confidence: 99%

Structural Features of Carbons Produced Using Glucose, Lactose, and Saccharose

et al. 2016

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Glucose, lactose, and saccharose were used as precursors to prepare chars at 400 °C then activated at 800 °C or 1000 °C in closed vessels with controlled amounts of oxygen penetrating through nanopores in the vessel walls. There are correlations between the porosity, amounts of residual O- and H-containing functionalities, and electroconductivity of amorphous carbons studied. The pore size distributions calculated using the nitrogen adsorption isotherms and TEM images show that all carbons are mainly nanoporous with certain contribution of narrow mesopores (at pore half-width x < 5 nm). Oxidizing activation by oxygen penetrating into the closed vessels with chars through nanopores can more strongly change the outer layers of char particles than the inner pores. Therefore, despite relatively great burn-off degree, the textural characteristics are relatively low for activated carbons.Electronic supplementary materialThe online version of this article (doi:10.1186/s11671-016-1723-z) contains supplementary material, which is available to authorized users.

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Section: Introductionmentioning

confidence: 99%

Structural Features of Carbons Produced Using Glucose, Lactose, and Saccharose

et al. 2016

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“…Sucrose has been identified as an important renewable precursor candidate, and carbon foams derived from sucrose have been prepared for various usages. [12][13][14][15][16] In 2005, Böhme et al 17 prepared mesoporous carbon foams from sucrose using a silica template. Lately, Prabhakaran et al fabricated carbon foams by thermofoaming from sucrose resin 18,19 and sucrose melt.…”

Section: Introductionmentioning

confidence: 99%

Preparation, microstructure, and compressive strength of carbon foams derived from sucrose and kaolinite

Huang

et al. 2014

J. Mater. Res.

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Carbon foams were successfully fabricated from sucrose and kaolinite clay by thermo-foaming method using aluminum nitrate as the blowing agent. The phases, pore structure, and compressive strength were characterized by x-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, and mechanical test, respectively. The foams had porous structure with spherical open cells of size in the range of 400-1000 lm, dense struts, and interconnected voids of size in the range of 100-600 lm. Both smooth and coarse types of voids are observed. Mullite and cristobalite, products of the clay mineral, are concentrated more on the strut and cell walls. The ultimate compressive strength evolution is found to be in correlation with the amount of voids and the microcracking in the carbon foams.

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“…[13][14][15][16][17] These activated samples were labeled RG (raw graphite), EG (expanded graphite), A2-EG, A4-EG, A6-EG, and A8-EG (activated EG in 2, 4, 6 or 8 M KOH solution, respectively). CA8-EG series (catalyst introduced in A8-EG) were named C1A8-EG, C2A8-EG, and C3A8-EG according to the amount (1, 2, or 3 g) of vanadium oxide used.…”

Section: Methodsmentioning

confidence: 99%

Investigation of the Hydrogen Storage Mechanism of Expanded Graphite by Measuring Electrical Resistance Changes

Im¹,

Jang²,

Lee³

2012

Bulletin of the Korean Chemical Society

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The hydrogen storage mechanism of graphite was studied by measuring the electrical resistance change. Graphite was expanded and activated to allow for an easy hydrogen molecule approach and to enlarge the adsorption sites. A vanadium catalyst was simultaneously introduced on the graphite during the activation process. The hydrogen storage increased due to the effects of expansion, activation, and the catalyst. In addition, the electrical resistance of the prepared samples was measured during hydrogen molecule adsorption to investigate the hydrogen adsorption mechanism. It was found that the electrical resistance changed as a result of the easy hydrogen molecule approach, as well as of the adsorption process and the catalyst. It was also notable that the catalyst improved not only the hydrogen storage capacity but also the speed of hydrogen storage based on the response time. The hydrogen storage mechanism is suggested based on the effects of expansion, activation, and the catalyst.

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Nanoporous carbon materials obtained by sucrose carbonization in the presence of KOH

Cited by 116 publications

References 40 publications

Structural Features of Carbons Produced Using Glucose, Lactose, and Saccharose

Structural Features of Carbons Produced Using Glucose, Lactose, and Saccharose

Preparation, microstructure, and compressive strength of carbon foams derived from sucrose and kaolinite

Investigation of the Hydrogen Storage Mechanism of Expanded Graphite by Measuring Electrical Resistance Changes

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