Fabrication of Carbon Capsules with Hollow Macroporous Core/Mesoporous Shell Structures

Yoon, Suk Bon; Sohn, Kwonnam; Kim, Jeong Yeon; Shin, Chae‐Ho; Yu, Jong‐Sung; Hyeon, Taeghwan

doi:10.1002/1521-4095(20020104)14:1<19::aid-adma19>3.0.co;2-x

Cited by 403 publications

(268 citation statements)

References 10 publications

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“…Yoon et al have applied the impregnation method of AlCl3-6H2O to generate the acidic sites on the mesoporous silica. 18 In this work,…”

Section: Resultsmentioning

confidence: 97%

Asymmetric Ring Opening of Terminal Epoxides Catalyzed by Chiral Co(III)-BF₃Salen Complex Immobilized on SBA-16

Kim

Lee²,

Kim³

2009

Bulletin of the Korean Chemical Society

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The homogeneous BF3 containing chiral Co(III) salen complexes were anchored non-covalently on the surfaces of mesoporous SBA-16 silica containing aluminum species. The Brönsted and Lewis acidic sites are attributed to the immobilization of fluorine functionalized chiral salen complexes on the supports. The FT-IR, UV, ESCA, and NMR analyses were performed to determine the structure of synthesized chiral salen catalysts. These heterogeneous catalysts could be applied in asymmetric ring opening of terminal epoxides by water and phenol derivatives. They showed very high enantioselectivity and yield more than 98% in the catalytic synthesis of optically active products.

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“…Yoon et al have applied the impregnation method of AlCl3-6H2O to generate the acidic sites on the mesoporous silica. 18 In this work,…”

Section: Resultsmentioning

confidence: 97%

Asymmetric Ring Opening of Terminal Epoxides Catalyzed by Chiral Co(III)-BF₃Salen Complex Immobilized on SBA-16

Kim

Lee²,

Kim³

2009

Bulletin of the Korean Chemical Society

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“…Porous carbon particles are of great interest in column packing, filler, hydrogen storage, supercapacitors, catalyst supports and other applications [1]. Several methods have been developed to prepare spherical carbon [2][3][4][5][6][7][8]. The solid-templating approach has been widely used for the synthesis of a variety of nanoporous carbon materials [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…Several methods have been developed to prepare spherical carbon [2][3][4][5][6][7][8]. The solid-templating approach has been widely used for the synthesis of a variety of nanoporous carbon materials [5][6][7][8][9]. Although precise control of pore size and pore structures is desirable, it has several limitations such as incomplete and time consuming infiltration of the precursor, laboring and expensive template removal process.…”

Section: Introductionmentioning

confidence: 99%

Preparation of porous carbon particle with shell/core structure

Jiang¹,

Wei²,

Yu³

et al. 2007

Express Polym. Lett.

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Abstract. Porous carbon particles with a shell/core structure have been prepared successfully by controlled precipitation of the polymer from droplets of oil-in-water emulsion, followed by curing and carbonization. The droplets of the oil phase are composed of phenolic resin (PFR), a good solvent (ethyl acetate) and porogen (Poly(methyl methacrylate), PMMA). The microstructure was characterized in detail by scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption, and thermo gravimetric analysis (TGA). The obtained carbon particles have a capsular structure with a microporous carbon shell and a mesoporous carbon core. The BET surface area and porous volume are calculated to be 499 m 2 g -1 and 0.56 cm 3 g -1 , respectively. The effects of the amount of porogen (PMMA), co-solvent (acetone) and surfactant on the resultant structure were studied in detail.

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“…Hollow mesoporous (HM) materials exhibit attractive physical and chemical properties, such as large adsorption capacity, good selectivity, and high catalytic activity, because of their high surface area, well-defined porous structure, and large tunable inner hollow size. [1][2][3] The comparatively large inner hollow core provides potential carrier space, and the mesoporous shell provides the passage between the inside and the outside. HM materials have potential applications in absorbents, 4 drug delivery, 5 and catalyst support.…”

mentioning

confidence: 99%

Magnetic properties and microstructures of iron oxide@mesoporous silica core-shell composite for applications in magnetic dye separation

Hao

Yang

et al. 2012

Journal of Applied Physics

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, X. L. (2012). Magnetic properties and microstructures of iron oxide@mesoporous silica core-shell composite for applications in magnetic dye separation. Journal of Applied Physics, 111 (7), 07B301-1-07B301-2.Magnetic properties and microstructures of iron oxide@mesoporous silica core-shell composite for applications in magnetic dye separation Abstract "In this report, hollow mesoporous silica (HMS) and iron oxide-hollow mesoporous silica (FexOy@HMS) core-shell composite were prepared by a one-step facile fabrication method. Transmission electron microscopy, X-ray diffraction, N-2 adsorption-desorption isotherms, and vibrating sample magnetometer were used to characterize the morphology, microstructure, and magnetic properties of the HMS and coreshell composite. The magnetic separability of FexOy@HMS core-shell composite was tested in Rhodamine B In this report, hollow mesoporous silica (HMS) and iron oxide-hollow mesoporous silica (Fe x O y @HMS) core-shell composite were prepared by a one-step facile fabrication method. Transmission electron microscopy, X-ray diffraction, N 2 adsorption-desorption isotherms, and vibrating sample magnetometer were used to characterize the morphology, microstructure, and magnetic properties of the HMS and core-shell composite. The magnetic separability of Fe x O y @HMS core-shell composite was tested in Rhodamine B (Rh.B) dye solution. The results indicate that the core-shell composite can absorb Rh.B dyes molecules effectively up to 90.1%.

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Fabrication of Carbon Capsules with Hollow Macroporous Core/Mesoporous Shell Structures

Cited by 403 publications

References 10 publications

Asymmetric Ring Opening of Terminal Epoxides Catalyzed by Chiral Co(III)-BF₃Salen Complex Immobilized on SBA-16

Asymmetric Ring Opening of Terminal Epoxides Catalyzed by Chiral Co(III)-BF₃Salen Complex Immobilized on SBA-16

Preparation of porous carbon particle with shell/core structure

Magnetic properties and microstructures of iron oxide@mesoporous silica core-shell composite for applications in magnetic dye separation

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Fabrication of Carbon Capsules with Hollow Macroporous Core/Mesoporous Shell Structures

Cited by 403 publications

References 10 publications

Asymmetric Ring Opening of Terminal Epoxides Catalyzed by Chiral Co(III)-BF3Salen Complex Immobilized on SBA-16

Asymmetric Ring Opening of Terminal Epoxides Catalyzed by Chiral Co(III)-BF3Salen Complex Immobilized on SBA-16

Preparation of porous carbon particle with shell/core structure

Magnetic properties and microstructures of iron oxide@mesoporous silica core-shell composite for applications in magnetic dye separation

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Product

Resources

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Asymmetric Ring Opening of Terminal Epoxides Catalyzed by Chiral Co(III)-BF₃Salen Complex Immobilized on SBA-16

Asymmetric Ring Opening of Terminal Epoxides Catalyzed by Chiral Co(III)-BF₃Salen Complex Immobilized on SBA-16