Adsorption of nitrogen on organized mesoporous alumina

Čejka, Jiřı́; Veselá, Lenka; Rathouský, Jiřı́; Zukal, Arnošt

doi:10.1016/s0167-2991(02)80572-9

Cited by 4 publications

(6 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…that ofCaragheorgheopol et al (23)) it seems to be clear that condensation of Al-O-Al, which is required to stabilize the framework, proceeds still during the first calcination steps. This is in agreement with27 Al MAS NMR data (Figure 9)showing a substantial shift from Al-octahedral to Al-tetrahedral arrangement after calcination. In general, with increasing temperature of calcination, surface areas and void volumes of organized mesoporous aluminas decrease while the apparent pore sizes increase.…”

supporting

confidence: 91%

“…Čejka et al (26,27) modified slightly the former procedure to synthesize mesoporous aluminas in order to carry out a detailed textural characterization by N 2 sorption measurements. Samples were templated with lauric and stearic acid in 1propanol solution.…”

Section: Anionic Surfactantsmentioning

confidence: 99%

“…27 Al MAS NMR spectra of aluminas synthesised in 1,4-dioxane solution using Tergitol 15-S-9 as template and Al sec-butoxide (a) and ethyl acetoacetate-modified Al sec-butoxide (b) as aluminum source. The samples were calcined at 550 ºC.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Synthesis, Characterization and Catalytic Applications of Organized Mesoporous Aluminas

et al. 2008

View full text Add to dashboard Cite

The synthesis of organized mesoporous aluminas has opened a very interesting area for application of this type of materials, particularly as catalysts or catalyst supports. This review focuses on the individual synthesis routes to produce organized mesoporous aluminas with large surface areas and narrow pore size distributions, and on the evaluation of their textural, chemical and thermal properties. Second part outlines examples of catalytic applications of organized mesoporous alumina-based catalysts. We tried to rationalize the synthetic approaches to prepare organized mesoporous aluminas, to relate their properties to synthetic procedures used as well as to their catalytic behavior in different reactions. Utilization of various structure-directing agents for "cationic", "neutral", "anionic", "nanocasting" and special approaches leading to scaffolding and lathlike organized mesoporous aluminas is discussed in the first part of this review, as well as textural and structural characterization and thermal stability of mesoporous aluminas synthesized by different synthetic approaches. In the second part, catalytic applications of organized mesoporous aluminas described in the open literature are evaluated from the standpoint of the importance of these reactions for technological applications.

show abstract

supporting

confidence: 91%

Section: Anionic Surfactantsmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis, Characterization and Catalytic Applications of Organized Mesoporous Aluminas

et al. 2008

View full text Add to dashboard Cite

show abstract

“…Cabrera et al (35) have used triethanolamine with CTAB for synthesis of organized mesoporous aluminas (OMA). Cejka et al (36) have used Al(sec-BuO) 3 , lauric acid or stearic acid and 1-propanol for preparation of OMA.…”

Section: Synthesis Of Mesoporous Aluminamentioning

confidence: 99%

“…This mechanism was more closely analogous to boehmite-surfactant sandwich structure proposed by González-Peña et al (50) . Cejka et al (36) reported the synthesis of organized mesoporous aluminas (OMA) by using carboxylic acids surfactants (lauric acid and stearic acids). Length of the hydrophobic hydrocarbon chain of carboxylic acids played the similar role like alkyl trimethylammonium surfactants in the synthesis of MCM-41, i.e.…”

Section: Mechanism Of Formation Of Mesoporous Aluminamentioning

confidence: 99%

Synthesis,Mechanisms and Different Applications of Mesoporous Materials Based on Silica and Alumina

Gobara

2016

Egypt. J. Chem.

View full text Add to dashboard Cite

ILICATE mesoporous materials have received widespread interest …..because of their potential applications. These novel materials, prepared either by soft-or hard-templating syntheses, become more and more important in many fields of science and technology such as adsorption, catalysis, separations, environmental processes, nanotechnology and biotechnology. According to IUPAC definition inorganic solids that contain pores with diameter in the size range of 2-50 nm are considered mesoporous materials, They also possess extremely high surface areas (>700 m 2 g −1) and narrow pore size distributions. This article review shows the current state of art and outlines the recent patents in mesoporous materials research in three general areas: synthesis, various mechanisms involved for porous structure formation and applications of mesoporous materials based on silica and alumina.

show abstract