Mesoporous Alumina Molecular Sieves

Bagshaw, Stephen A.; Pinnavaia, Thomas J.

doi:10.1002/anie.199611021

Cited by 562 publications

(335 citation statements)

References 23 publications

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“…In the literature, organized mesoporous alumina are usually obtained using P123/Al molar ratio ranging from 0.01 to 0.017 [14,33,34], with exception of the pioneer works of Bagshaw and Pinnavaia where molar ratio up to 1 was used [7]. We thus focused on P123/Al molar ratio in the 0.005-0.016 range.…”

Section: P123/al Ratiomentioning

confidence: 99%

“…Following the discovery of mesoporous silica-based materials [2][3][4], Vaudry et al reported the first synthesis of mesoporous alumina materials from aluminium alkoxides using carboxylic acids with a long alkyl chain [5]. Concomitantly, Bagshaw et al obtained alumina with a well-defined mesoporosity using non-ionic polymers [6,7]. These works paved the way for further preparation of alumina-based materials with a controlled mesoporosity following addition of porogens.…”

Section: Introductionmentioning

confidence: 99%

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A Reliable Method for the Preparation of Multiporous Alumina Monoliths by Ice-Templating

et al. 2016

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Alumina supports presenting a bimodal porosity are generally advantageous for the conversion of bulky molecules such as found in biomass, refining, and petrochemistry. However, shaping of such materials, while controlling pores size and orientation, proves to be hard. This problem can be tackled by using a simple method involving sol-gel chemistry, surfactant self-assembly, and ice-templating. Herein, a systematic study of the formulation and process parameters' influence on the final material properties is presented. This protocol results in the repeatable preparation of centimeter-sized alumina monoliths presenting a uni-directional macroporosity and structured mesopores. These monoliths should be of particular interest in high flow rate catalytic applications.

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Section: P123/al Ratiomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Reliable Method for the Preparation of Multiporous Alumina Monoliths by Ice-Templating

et al. 2016

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“…Furthermore, it is possible to synthesize mesoporous structures of the materials other than silica. Methodology to prepare mesoporous silica via the template synthesis is extended to preparation of a various mesoporous metal oxides [46][47][48][49][50][51][52][53][54][55][56][57][58][59] such as TiO 2 , Ta 2 O 5 , Nb 2 O 5 , ZrO 2 , Al 2 O 3 , and V 2 O 5 as well as synthesis of mesoporous aluminophosphate [60][61][62][63].…”

Section: Introductionmentioning

confidence: 99%

New families of mesoporous materials

Vinu

Mori

Ariga

2006

Science and Technology of Advanced Materials

167

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Mesoporous materials have been paid much attention in both scientific researches and practical applications. In this review, we focus on recent developments on preparation and functionalization of new families of mesoporous materials, especially non-siliceous mesoporous materials invented in our research group. Replica synthesis is known as the method to synthesize mesoporous materials composed of various elements using originally prepared mesoporous replica. This strategy has been applied for the syntheses of novel mesoporous materials such as carbon nanocage and mesoporous carbon nitride. Carbon nanocage has a cage-type structure with huge surface area and pore volume, which exhibits superior capabilities for biomolecular adsorption. Mesoporous carbon nitride was synthesized, for first time, by using mixed material source of carbon and nitrogen simultaneously. As a totally new strategy for synthesis of mesoporous materials, the elemental substitution method has been recently proposed by us. Direct substitution of component elements in original mesoporous materials, with maintaining structural regularity, provided novel mesoporous materials. According to this synthetic strategy, mesoporous boron nitride and mesoporous boron carbon nitride have been successfully prepared, for first time. In addition to these material inventions, hybridization of high functional materials, such as biomaterials, to mesoporous structure has been also developed. Especially, immobilization of proteins in mesopores was systematically researched, and preparation of peptidehybridized mesoporous silica was demonstrated. These new families of mesoporous materials introduced in this review would have high potentials in future practical applications in wide ranges from electronics and photonics to environmental and medical uses. r

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“…In general, the pore size of pillared clays is larger than that of zeolites and smaller than that of inorganic meso-and macroporous solids such as silica and alumina [9,10]. The pore size and physicochemical properties of pillared clays can be controlled by varying both the host crystals and pillaring agents.…”

Section: Introductionmentioning

confidence: 99%

Preparation of M0 metal/alumina-pillared mica composites (M = Cu, Ni) by in situ reduction of interlayer M2+ ions of alumina-pillared fluorine micas

Yamaguchi

Taruta

Yamakami

et al. 2007

Materials Research Bulletin

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Alumina-pillared fluorine micas form micropores in the interlayer region and exhibit cation exchangeability. Reduction of 3d transition metal cations (Cu 2+ and Ni 2+ ) in the interlayer regions of the cation exchanged alumina-pillared micas was attempted using ethylene glycol or diethylene glycol. The Cu 2+ -exchanged pillared mica led to the formation of a pillared mica composite containing interlayer zero-valence Cu 0 metal clusters along with Cu 0 metal fine particles on external surfaces of pillared mica flakes when refluxed in either ethylene glycol or diethylene glycol. Ni 2+ cations in the interlayer region were also found to be reducible by refluxing in diethylene glycol. The zero-valence metal contained in the refluxed products occurs in three forms: M 0 clusters in the interlayer region, elongated fine particles sandwiched between silicate layers, and submicron spherical particles on external surfaces of mica crystals. The zero-valence metal/alumina-pillared mica composites thus obtained largely retained the micropore properties of the alumina-pillared micas.

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Mesoporous Alumina Molecular Sieves

Cited by 562 publications

References 23 publications

A Reliable Method for the Preparation of Multiporous Alumina Monoliths by Ice-Templating

A Reliable Method for the Preparation of Multiporous Alumina Monoliths by Ice-Templating

New families of mesoporous materials

Preparation of M0 metal/alumina-pillared mica composites (M = Cu, Ni) by in situ reduction of interlayer M2+ ions of alumina-pillared fluorine micas

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