Synthesis of Highly Ordered Carbon Molecular Sieves via Template-Mediated Structural Transformation

Ryoo, Ryong; Joo, Sang Hoon; Jun, Sangmi

doi:10.1021/jp991673a

Cited by 2,398 publications

(1,628 citation statements)

References 16 publications

Supporting

Mentioning

1,550

Contrasting

Unclassified

Order By: Relevance

“…[7][8][9] Silica matrix of defined pores and walls is selected for infiltration of carbon precursor in gas (e.g. propylene) or liquid phase, e.g.…”

Section: Templated Carbons For Supercapacitor Applicationmentioning

confidence: 99%

Supercapacitors based on carbon materials and ionic liquids

Frąckowiak¹

2006

J. Braz. Chem. Soc.

111

View full text Add to dashboard Cite

Este artigo descreve o desempenho de supercapacitores construídos a partir de diferentes materiais de carbono. São descritos também o princípio geral de supercapacitor e a fórmula associada com sua operação. A função da nanotextura de carbono é enfatizada, selecionando carbonos preparados por técnicas de moldagem. Foi demonstrado que, principalmente, microporos e pequenos mesoporos são importantes para carregar a dupla camada elétrica, entretanto, a interligação de poros é crucial para a propagação de cargas. A presença de heteroátomo na rede de carbono, por exemplo nitrogênio, é útil por causa das reações faradaicas reversíveis adicionais. Foi encontrada uma dependência linear entre os valores de capacitância e a quantidade de nitrogênio. Líquidos iônicos são atualmente considerados como uma nova geração de eletrólitos com propriedades interessantes, por exemplo, alta voltagem de operação. Um aumento na voltagem de supercapacitores (acima de 3V) foi obtido pela aplicação de líquidos iônicos baseados em sais de fosfônio. This paper presents performance of supercapacitor built from different carbon materials. The general principle of supercapacitor and formula connected with its operation are also described. The role of carbon nanotexture has been underlined selecting carbons prepared by template techniques. It has been demonstrated that mainly micropores and small mesopores play important role for charging of electrical double layer, however, interconnectivity of pores is crucial for charge propagation. The presence of heteroatom, e.g. nitrogen in the carbon network is profitable because of additional reversible faradaic reactions. A linear dependence of capacitance values vs nitrogen content has been found. Ionic liquids are presently considered as a novel generation of electrolyte with interesting properties, e.g. a high operating voltage. An increase of supercapacitor voltage (over 3V) has been realized by application of ionic liquids based on phosphonium salt.

show abstract

“…[7][8][9] Silica matrix of defined pores and walls is selected for infiltration of carbon precursor in gas (e.g. propylene) or liquid phase, e.g.…”

Section: Templated Carbons For Supercapacitor Applicationmentioning

confidence: 99%

Supercapacitors based on carbon materials and ionic liquids

Frąckowiak¹

2006

J. Braz. Chem. Soc.

111

View full text Add to dashboard Cite

show abstract

“…There have been many successful approaches to hierarchical MFI-type zeolites [16]. The synthetic techniques involve (i) chemical and/or physical posttreatment, such as the steaming or acid leaching methods [17][18][19]; (ii) hard templating synthesis, such as carbon and colloid templating [20][21][22]; (iii) soft templating synthesis, such as the use of amphiphilic organosilanes [23,24]. However, for increased efficiency within industrial processes, hierarchically porous zeolitic catalysts displaying both micro-meso-macroporosity and strongly active sites are more desirable.…”

Section: Introductionmentioning

confidence: 99%

Multimodal Zr-Silicalite-1 zeolite nanocrystal aggregates with interconnected hierarchically micro-meso-macroporous architecture and enhanced mass transport property

Chen

et al. 2012

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

“…8 Recently, various types of ordered mesoporous carbons (OMCs) have been generated via a multistep synthetic procedure, in which ordered mesoporous silicas (OMSs) are employed as hard templates. [9][10][11][12][13][14][15] The most common synthetic route yielding OMCs involves preparation of OMS templates, impregnation of the OMS pores with carbon precursors, carbonization, and removal of the templates ( Fig. 1(A)).…”

mentioning

confidence: 99%

Synthesis of ordered mesoporous carbons with channel structure from an organic–organic nanocomposite

et al. 2005

View full text Add to dashboard Cite

Mesoporous carbons with ordered channel structure (COU-1) have been successfully fabricated via a direct carbonization of an organic-organic nanocomposite.The discovery of nanostructured carbon materials such as fullerenes 1 and carbon nanotubes 2 has led to a considerable interest in the development of various carbonaceous materials. In particular, porous carbonaceous materials have been attracting much attention because of their high surface areas, large pore volumes, chemical inertness and high mechanical stability. Porous carbons show promise in the fields of hydrogen-storage, catalysis and electrochemistry. Many researchers have reported control of such pore structures through the template method, using various inorganic porous materials such as alumina membranes, 3 zeolites, 4-6 siliceous opals 7 and silica xerogels. 8 Recently, various types of ordered mesoporous carbons (OMCs) have been generated via a multistep synthetic procedure, in which ordered mesoporous silicas (OMSs) are employed as hard templates. [9][10][11][12][13][14][15] The most common synthetic route yielding OMCs involves preparation of OMS templates, impregnation of the OMS pores with carbon precursors, carbonization, and removal of the templates ( Fig. 1(A)). The removal of the OMS templates can be performed through a treatment with HF solution, converting the carbon into a porous form, while retaining the nanostructural features of the OMSs.In contrast, our novel OMC synthesis route, reported here, avoids the use of hard templates, and could thus reduce the number of preparation steps and the cost involved in producing these materials. Our strategy is to use an organic-organic interaction between a thermosetting polymer and a thermallydecomposable surfactant to form a periodic ordered nanocomposite. The thermosetting polymer is carbonized by heating under N 2 , after which process it remains as a carbonaceous pore wall ( Fig. 1(B)). Resorcinol/formaldehyde (RF) and triethyl orthoacetate (EOA) were used as the carbon co-precursors and triblock copolymer Pluronic F127 was used as a surfactant (Fig. 1(C)). The resultant materials are referred to as COU-1.In a typical synthesis, 0.661 g resorcinol was completely dissolved in a mixture composed of 1.74 g deionized water, 2.3 g ethanol and 0.06 ml hydrochloric acid (5 mol l 21 ). Then, 0.378 g Pluronic F127 was added to the resorcinol solution. After the complete dissolution of the Pluronic F127, 0.487 g of triethyl orthoacetate and 0.541 g of formaldehyde was added to the solution, and stirred at 30 uC for 20 min. The resultant solution was added dropwise to a silicon substrate spinning at 50 rpm, and then the substrate was spun up to 1000 rpm for 2 min. For polymerization of the resorcinol with formaldehyde, the asdeposited sample was heated at 90 uC for 5 h, in air. Then, the resultant brown deposit was carbonized under a nitrogen atmosphere at 400 uC for 3 h at a heating rate of 1 uC min 21 , followed by further carbonization at 600 and 800 uC for 3 h.{ Electronic supplementary informati...

show abstract

Synthesis of Highly Ordered Carbon Molecular Sieves via Template-Mediated Structural Transformation

Cited by 2,398 publications

References 16 publications

Supercapacitors based on carbon materials and ionic liquids

Supercapacitors based on carbon materials and ionic liquids

Multimodal Zr-Silicalite-1 zeolite nanocrystal aggregates with interconnected hierarchically micro-meso-macroporous architecture and enhanced mass transport property

Synthesis of ordered mesoporous carbons with channel structure from an organic–organic nanocomposite

Contact Info

Product

Resources

About