Nanoengineering of a Magnetically Separable Hydrogenation Catalyst

Lu, An-Hui; Schmidt, Wolfgang; Matoussevitch, Nina; Bönnemann, Helmut; Spliethoff, Bernd; Tesche, B.; Bill, Eckhard; Kiefer, W.; Schüth, Ferdi

doi:10.1002/ange.200454222

Cited by 200 publications

(115 citation statements)

References 13 publications

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“…[120] We have established a series of consecutive manipulation steps to fabricate magnetically separable ordered mesoporous carbons, on which magnetic nanoparticles were selectively deposited on the outer surface of the carbons-the pore system was left blocked during the modification, and the nanoparticles were protected by a nanometerthick carbon layer. [121] The overall synthetic strategy and typical TEM images of such a magnetically separable carbon are presented in Figures 11 and 12, respectively. Such magnetic nanocomposites have very high surface areas, large pore volumes, and uniform pore sizes.…”

Section: Functionalized Porous Solids By Nanocastingmentioning

confidence: 99%

Nanocasting: A Versatile Strategy for Creating Nanostructured Porous Materials

2006

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Nanocasting is a powerful method for creating materials that are more difficult to synthesize by conventional processes. We summarize recent developments in the synthesis of various structured porous solids, covering silica, carbon, and other nonsiliceous solids that are created by a nanocasting pathway. Structure replication on the nanometer length scale allows materials' properties to be manipulated in a controlled manner, such as tunable composition, controllable structure and morphology, and specific functionality. The nanocasting pathway with hard templates opens the door to the design of highly porous solids with multifunctional properties and interesting application perspectives.

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Section: Functionalized Porous Solids By Nanocastingmentioning

confidence: 99%

Nanocasting: A Versatile Strategy for Creating Nanostructured Porous Materials

2006

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“…These catalysts are generally separated by either allowing the particles to stick to the magnetic stirring bar [61] or by collecting them with a permanent magnet held next to the reaction vessel and decanting the liquid [60,103] .…”

Section: Magnetic Separationmentioning

confidence: 99%

Application of alternative energy forms in catalytic reactor engineering

Houlding

Rebrov

2012

Green Processing and Synthesis

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This review provides a general overview of recent applications of magnetic nanoparticles for controlled radiofrequency (RF) heating in catalytic synthesis, mass transfer enhancement in laminar fl ow and magnetic separation. By directly delivering RF energy to magnetic materials, issues such as long heating periods and energy losses can be minimized. The main mechanisms of RF heating are briefl y reviewed. The effect of nanoparticles size, shape and composition on the effi ciency of RF heating is discussed. RF energy has been shown to be effective in many applications, however, it is still not used in chemicals due to high equipment costs.

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“…Magnetic nanoparticles are of great interest for researchers from a wide range of disciplines, including magnetic fluids, [1] catalysis, [2,3] biotechnology/biomedicine, [4] magnetic resonance imaging, [5,6] data storage, [7] and environmental remediation. [8,9] While a number of suitable methods have been developed for the synthesis of magnetic nanoparticles of various different compositions, successful application of such magnetic nanoparticles in the areas listed above is highly dependent on the stability of the particles under a range of different conditions.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Nanoparticles: Synthesis, Protection, Functionalization, and Application

2007

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This review focuses on the synthesis, protection, functionalization, and application of magnetic nanoparticles, as well as the magnetic properties of nanostructured systems. Substantial progress in the size and shape control of magnetic nanoparticles has been made by developing methods such as co-precipitation, thermal decomposition and/or reduction, micelle synthesis, and hydrothermal synthesis. A major challenge still is protection against corrosion, and therefore suitable protection strategies will be emphasized, for example, surfactant/polymer coating, silica coating and carbon coating of magnetic nanoparticles or embedding them in a matrix/support. Properly protected magnetic nanoparticles can be used as building blocks for the fabrication of various functional systems, and their application in catalysis and biotechnology will be briefly reviewed. Finally, some future trends and perspectives in these research areas will be outlined.

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Nanoengineering of a Magnetically Separable Hydrogenation Catalyst

Cited by 200 publications

References 13 publications

Nanocasting: A Versatile Strategy for Creating Nanostructured Porous Materials

Nanocasting: A Versatile Strategy for Creating Nanostructured Porous Materials

Application of alternative energy forms in catalytic reactor engineering

Magnetic Nanoparticles: Synthesis, Protection, Functionalization, and Application

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