Synthesis and characterization of a novel extra large ring of aluminophosphate JDF-20

Huo, Quan; Xu, Ruren; Li, Shougui; Ma, Zhuang; Thomas, John Meurig; Jones, Richard H.; Chippindale, Ann M.

doi:10.1039/c39920000875

Cited by 251 publications

(124 citation statements)

References 6 publications

(3 reference statements)

Supporting

Mentioning

117

Contrasting

Unclassified

Order By: Relevance

“…Beside the well-known zeolitic aluminium silicates, aluminium phosphate based molecular sieves (AlPO 4 [6,7]. Strict alternation of phosphorus and aluminium on framework sites in their structures is characteristic of these aluminium phosphate networks.…”

Section: Introductionmentioning

confidence: 99%

Low Temperature Syntheses of Highly-ordered Framework Materials: The Aluminium Phosphate Ammonium Taranakite

Schwieger

Altenschildesche

Kokotailo

et al. 1998

Z. anorg. allg. Chem.

View full text Add to dashboard Cite

The formation of a highly crystalline ammonium analogue of the aluminium phosphate mineral taranakite at ambient temperature and above is described. The high crystallinity and ordering of the products obtained when ammonium is used as a templating agent suggests that it is intimately involved in the structure. At long crystallization times and at higher temperatures, transformation to the framework structure of AlPO4‐15 occurs. Results from powder x‐ray diffraction, solid state NMR, electron microscopy, thermal and element analyses are presented and discussed. They demonstrate the high degree of crystallinity and ordering of the taranakite samples synthesized by this method. These results – in particular the very mild synthesis conditions – suggest the possibility that there may be sequestering of ammonium phosphate fertilizers in form of NH4‐taranakite from their interaction with clay materials in soils.

show abstract

Section: Introductionmentioning

confidence: 99%

Low Temperature Syntheses of Highly-ordered Framework Materials: The Aluminium Phosphate Ammonium Taranakite

Schwieger

Altenschildesche

Kokotailo

et al. 1998

Z. anorg. allg. Chem.

View full text Add to dashboard Cite

show abstract

“…However, relatively small individual micropores in zeolites such as Beta, ZSM-5, and Y strongly influence mass transport to and from the active sites located within them, severely limiting the performance of industrial catalysts. [1,2] To overcome this problem, various strategies have been successfully pursued, such as the synthesis of nanosized zeolites, [3] ultralarge-pore zeolites and zeolite analogues (VPI-5, [4] JDF-20, [5] UTD-1, [6,7] CIT-5, [8] SSZ-53, [9] ECR-34, [10] UCSB, [11] ITQ-21, [12] IM-12, [13] and SU-M, [14,15] among others), and ordered mesoporous materials (e.g. MCM-41, [17] SBA-15, [18] and FSM-16, [19]).…”

mentioning

confidence: 99%

Catalytic Properties of Hierarchical Mesoporous Zeolites Templated with a Mixture of Small Organic Ammonium Salts and Mesoscale Cationic Polymers

et al. 2006

Self Cite

View full text Add to dashboard Cite

Crystals of zeolites with intricate micropores have been widely used in industry as heterogeneous catalysts, in particular as solid acid catalysts in the fields of oil refining and petrochemistry. However, relatively small individual micropores in zeolites such as Beta, ZSM-5, and Y strongly influence mass transport to and from the active sites located within them, severely limiting the performance of industrial catalysts. [1,2] [19]). However, the use of these materials is rather limited owing to the difficult separation of nanosized zeolite crystals from the reaction mixture,[3] the complexity of the templates used for the synthesis of ultralarge-pore zeolites, [6][7][8][9] and the relatively low thermal and hydrothermal stability of ordered mesoporous materials. [17][18][19][20][21][22][23][24][25][26][27][28] More recently, mesoporous zeolites from nanosized carbon templates have also been successfully synthesized, [29][30][31][32] but their industrial applications are still limited by the complexity of the synthetic procedure involved and the hydrophobicity of the carbon templates.Herein, we demonstrate a facile, controllable, and universal route for the synthesis of hierarchical mesoporous zeolites templated from a mixture of small organic ammonium salts and mesoscale cationic polymers. The route involves a one-step hydrothermal synthesis, and the templated mixture is homogeneously dispersed in the synthetic gel. Importantly, these novel zeolites exhibit excellent catalytic properties compared with conventional zeolites. This work may give an entry to the synthesis of hierarchical mesoporous zeolites that reveal fast mass transport, with potential application in industrial catalysis.Beta zeolite is generally synthesized from a small organic template of tetraethylammonium hydroxide (TEAOH). In the present strategy, hierarchical mesoporous Beta zeolite (Beta-H) was crystallized in the presence of TEAOH and a mesoscale cationic polymer, polydiallyldimethylammonium chloride (PDADMAC). For comparison, conventional Beta zeolite was prepared in the absence of cationic polymer by a similar procedure.The X-ray diffraction (XRD) pattern of calcined Beta-H (Figure 1a) shows well-resolved peaks in the 4-40° range, characteristic for the Beta zeolite structure.

show abstract

“…The diverse arrangements of AlO n polyhedral units (n = 4-6) and P(O b ) n (O t ) 4Àn tetrahedral units (b: bridging, t: terminal, n = 1-4) form zero-dimensional (0D) cluster, one-dimensional (1D) chain, two-dimensional (2D) layer, and three-dimensional (3D) open-framework structures with various stoichiometries, such as AlPO 4 [5] Notable examples are the extra-large-pore materials VPI-5 [6] and JDF-20. [7] For the anionic 2D layered compounds with [10] and…”

mentioning

confidence: 99%

Hydrogen‐Bonded Helices in the Layered Aluminophosphate (C₂H₈N)₂[Al₂(HPO₄)(PO₄)₂]

Song

et al. 2004

Angew Chem Int Ed

Self Cite

View full text Add to dashboard Cite

Following the discovery of microporous aluminophosphates AlPO 4 -n (n denotes a specific structure type), [1] there is considerable interest in developing new aluminophosphate compounds with novel framework structures because of their potential application in catalysis, adsorption, and separation. [2][3][4][5] The aluminophosphate family encompasses a rich structural variety enhanced by the employment of organic amines as structure-directing agent under hydrothermal/ solvothermal conditions. The diverse arrangements of AlO n polyhedral units (n = 4-6) and P(O b ) n (O t ) 4Àn tetrahedral units

show abstract

Synthesis and characterization of a novel extra large ring of aluminophosphate JDF-20

Abstract: A novel 20-membered ring channel aluminophosphate has been discovered; its synthesis and characterization are rep0 rted.

Cited by 251 publications

References 6 publications

Low Temperature Syntheses of Highly-ordered Framework Materials: The Aluminium Phosphate Ammonium Taranakite

Low Temperature Syntheses of Highly-ordered Framework Materials: The Aluminium Phosphate Ammonium Taranakite

Catalytic Properties of Hierarchical Mesoporous Zeolites Templated with a Mixture of Small Organic Ammonium Salts and Mesoscale Cationic Polymers

Hydrogen‐Bonded Helices in the Layered Aluminophosphate (C₂H₈N)₂[Al₂(HPO₄)(PO₄)₂]

Contact Info

Product

Resources

About

Synthesis and characterization of a novel extra large ring of aluminophosphate JDF-20

Abstract: A novel 20-membered ring channel aluminophosphate has been discovered; its synthesis and characterization are rep0 rted.

Cited by 251 publications

References 6 publications

Low Temperature Syntheses of Highly-ordered Framework Materials: The Aluminium Phosphate Ammonium Taranakite

Low Temperature Syntheses of Highly-ordered Framework Materials: The Aluminium Phosphate Ammonium Taranakite

Catalytic Properties of Hierarchical Mesoporous Zeolites Templated with a Mixture of Small Organic Ammonium Salts and Mesoscale Cationic Polymers

Hydrogen‐Bonded Helices in the Layered Aluminophosphate (C2H8N)2[Al2(HPO4)(PO4)2]

Contact Info

Product

Resources

About

Hydrogen‐Bonded Helices in the Layered Aluminophosphate (C₂H₈N)₂[Al₂(HPO₄)(PO₄)₂]