Microporous and Mesoporous Materials

Schüth, Ferdi; Schmidt, Wolfgang

doi:10.1002/1521-4095(20020503)14:9<629::aid-adma629>3.0.co;2-b

Cited by 526 publications

(277 citation statements)

References 42 publications

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“…Once a suspension is stabilized, the degree of hydrophobization is the main property which affects the production of foam. Given their thermodynamic instability, foams are often kinetically stabilized through the adsorption of surface active molecules or colloidal particles at the gas-liquid interfaces [46,47]. The adsorbed molecules and particles stabilize the system by inhibiting the coalescence and Ostwald ripening of droplets and bubbles.…”

Section: Contact Angle and Surface Tensionmentioning

confidence: 99%

“…The high energy associated with the adsorption of particles at interfaces contrasts to low adsorption energies of surfactants and leads to foams stabilized by particles being more stable than those stabilized with surfactants. It also leads to steric layers which strongly hinder bubbles' shrinkage and expansion, minimizing Ostwald ripening for very long periods of time [46].…”

mentioning

confidence: 99%

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Porous Ceramics

Sarkar¹,

Kim²

2015

Advanced Ceramic Processing

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The unique chemical composition and microstructure of porous ceramics enable the ceramic products used in a number of applications such as filtration of molten metals and hot corrosive gases, high-temperature thermal insulation, support for catalytic reactions, filtration of diesel engine exhaust gases, etc. These applications take advantage of special characteristics of porous ceramics such as low thermal mass, low thermal conductivity, controlled permeability, high surface area, low density, and high specific strength. In this chapter, we emphasize on direct foaming method, a simple and versatile approach that allows fabrication of porous ceramics with tailored microstructure along with distinctive properties. Foam stability is achieved upon controlled addition of amphiphiles to the colloidal suspension, which induce in situ hydrophobization, allowing the wet foam to resist coarsening upon drying and sintering.

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Section: Contact Angle and Surface Tensionmentioning

confidence: 99%

mentioning

confidence: 99%

Porous Ceramics

Sarkar¹,

Kim²

2015

Advanced Ceramic Processing

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“…Mesoporous silica [1][2][3][4] and semiconductor quantum dots (QDs) 5,6 are two distinct classes of nanostructured materials that are under intense study for potential uses in chemical catalysis, chromatographic separations, optoelectronics, and lately for biosensing and biolabeling. [7][8][9] Much of the interest in mesoporous silica arises from its ordered structure of nanopores in the size range of 2-100 nm diameter, 10,11 which provides a stable and accessible surface for immobilizing a variety of functional molecules and small particles.…”

Section: Introductionmentioning

confidence: 99%

Doping Mesoporous Materials with Multicolor Quantum Dots

2003

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Rapid and precise doping of mesoporous silica beads has been achieved with luminescent quantum dots, leading to 1-2 orders of magnitude improvements over the results previously achieved with polystyrene latex beads. A surprising finding is that multivalent hydrophobic interactions provide a strong driving force for efficient partitioning and immobilization of surfactant-coated quantum dots in the silica nanopores. The results indicate that the doping levels are so quantitative and precise that at least 30 ratios are distinguishable with two colors of quantum dots and that over 1000 ratios are possible with only three colors. By integrating mesoporous structures and quantum-confined particles, this work opens new possibilities in developing encoded or "smart" nanocomposite materials for multiplexed bioassay, high-throughput screening, and military security applications.

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“…The wide-angle powder X-ray diffraction diagram of mesoporous Mn 2 O 3 (Fig. 2, inset) exhibited reflections attributable to the crystalline (rock salt) structure of manganese oxide; such crystallinity was observed when the samples were kept at 873 K for 5 h after conversion of Mn(NO 3 ) 2 ․xH 2 O or Mn(AcAc) 2 to Mn 2 O 3 within the silica or carbon matrix.…”

Section: Synthesis Of Mesoporous Manganese Oxides By a Carbonmentioning

confidence: 99%

“…[1][2][3][4][5][6] In particular, mesoporous materials with a transition-metal oxide framework have immense potential for applications in catalysis, photocatalysis, sensors, and electrode materials because of their characteristic catalytic, optical, and electronic properties.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Ordered Mesoporous Manganese Oxides by Double Replication for Use as an Electrode Material

Guo

Kim²

2011

Bulletin of the Korean Chemical Society

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Periodically ordered mesoporous manganese oxides were synthesized in a single and double replication procedure. Mesoporous SBA-15 and -16 silica and their reverse replica carbons were successively used as hard templates. The silica and carbon pore systems were infiltrated with Mn(NO3)2․xH2O or Mn(AcAc)2, which was then converted to Mn2O3 at 873 K; the silica and carbon matrix were finally removed by NaOH solution or calcinations in air. The structure of the mesoporous Mn2O3, using a carbon template, corresponds to that of the original SBA-15 and SBA-16 silica. The products consist of hexagonally arranged cylindrical mesopores with crystalline pore walls or cubic mesoporous pores. The structure of replica has been confirmed by XRD, TEM analysis, and its electrochemical properties were tested with cyclic voltammetry. Formation of Mn2O3 inside the mesoporous carbon pore system showed much improved electrical properties.

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Microporous and Mesoporous Materials

Cited by 526 publications

References 42 publications

Porous Ceramics

Porous Ceramics

Doping Mesoporous Materials with Multicolor Quantum Dots

Synthesis of Ordered Mesoporous Manganese Oxides by Double Replication for Use as an Electrode Material

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