Extremely high microporosity and sharp pore size distribution of a large surface area carbon prepared in the nanochannels of zeolite Y

Matsuoka, Koichi; Yamagishi, Yasushi; Yamazaki, Toshiaki; Setoyama, Norihiko; Tomita, Akira; Kyotani, Takashi

doi:10.1016/j.carbon.2004.10.050

Cited by 172 publications

(114 citation statements)

References 5 publications

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“…The surface area was calculated using Brunauer-EmmettTeller (BET) method based on the adsorption data of N 2 in the relative pressure (p/p 0 ) range of 0.02-0.25. The partial pressure range (0.02-0.25) for the calculation of surface area was selected taking into accounts previous reports that lower partial pressure range (0.01-0.05) will overestimate surface area whereas partial pressure range (0.1-0.3) underestimate surface area [36,37]. Before N 2 adsorption measurements, samples were degassed for 10 h at 300 • C.…”

Section: Characterization Of Porous Carbonsmentioning

confidence: 99%

Large surface area sucrose-based carbons via template-assisted routes: Preparation, microstructure, and hydrogen adsorption properties

Cai

Yang

Xing

et al. 2014

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Section: Characterization Of Porous Carbonsmentioning

confidence: 99%

Large surface area sucrose-based carbons via template-assisted routes: Preparation, microstructure, and hydrogen adsorption properties

Cai

Yang

Xing

et al. 2014

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…Such regularity is actually observed with a TEM, as is evident in 55-60 Then, we further improved the preparation method and, as a result, we have succeeded in synthesizing ordered microporous carbon with a surface area of more than 4000 m 2 g À1 and micropore volume of 1.8 cm 3 g À1 . 61 This kind of carbon with a large surface area and micropore volume has never been reported. In the following sections, the extraordinary pore structure of this carbon will be introduced in comparison with commercial microporous carbons with a large surface area.…”

Section: Synthesis Of Ordered Microporous Carbons Using Zeolite Templatementioning

confidence: 99%

Synthesis of Various Types of Nano Carbons Using the Template Technique

Kyotani¹

2006

Bulletin of the Chemical Society of Japan

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101

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Using uniform nanochannels of an aluminum anodic oxide film as a template, uniform and unique multiwalled carbon nanotubes can be synthesized with a selectivity of 100%. This technique allows one to precisely control the diameters and the length of nanotubes. Moreover, it is possible to chemically modify only the inner surface of carbon nanotubes and to prepare carbon nanotubes with a double coaxial structure of heteroatom-doped multiwalls. The test tube like carbon prepared by this technique was found to be dispersible in water without any post treatment. In addition to this one-dimensional approach, unique microporous carbon can be prepared by the template technique using zeolite Y. The resulting microporous carbons are characterized by their regular ordering, originating from the regularity of the parent zeolite. When the synthesis conditions were optimized, the specific surface area and the micropore volume of the zeolitetemplated carbon reach more than 4000 m 2 g À1 and 1.8 cm 3 g À1 , respectively. This review introduces such a templatemediated approach and highlights how useful and versatile the template technique is for the production of nano carbons.Carbon is an element with a unique ability to bond with itself principally via sp 3 (diamond-like) and sp 2 (graphite-like) hybridization. This versatility gives rise to a rich diversity of structural forms of solid carbon. Most of the materials dealt with in carbon science and industry are considered to be composed of mainly large polycyclic aromatic molecules. The differences in the shape of such macromolecules and the way the molecules assemble (how they stack and how they are connected to one another) again lead to an immense variety of possibilities. If one could control the shape of the macromolecules and the state of their assemblage at the nanometer level, it would be possible to prepare carbon materials with a unique nano structure, thereby expecting novel and useful characteristics from the structure. Such control is, however, a very difficult task, because the nano structure of carbon materials is not uniform by nature, except for perfect graphite and diamond. To illustrate, a drawing of the molecular structure of activated carbon is shown in Fig. 1, where many curved polycyclic aromatic molecules with different sizes and shapes are stacked and connected in very complicated ways, which is quite different from the uniform ordered porous structure of zeolite materials. It is easily understood from this molecular model that control of the shape and the position of each macromolecule in the model is very difficult and essentially impossible. For the ultimate control of the carbon nano structure, it is desirable to build up a carbon structure from small building blocks, i.e., synthesize the structure from small organic molecules using techniques developed in the field of organic synthesis. However, the organic syntheses of fullerenes and carbon nanotubes have not been achieved yet, even by using cutting-edge technology. One of the most powerful and pro...

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“…They reported ZTCs with narrower pore size distribution and extremely high BET surface area reaching 3730 m 2 g ¹1 under optimized synthetic conditions. 296,297 Several efforts have been made for controlling the surface property of ZTC by changing the zeolite template compositions. For example, oxygen-containing groups can be formed on the interface between the carbon and the walls of the zeolite template.…”

Section: ¹1mentioning

confidence: 99%