Synthesis of Lamellar Mesostructured ZSM-48 Nanosheets

Zhang, Yunjuan; Ma, Yangmin; Che, Shunai

doi:10.1021/acs.chemmater.8b00146

Cited by 47 publications

(44 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, MIT (Massachusetts Institute of Technology)-1 [67] and self-pillared pentasil (SPP) [40,68] have been prepared using the templating method in a one-step crystallization processes. Other aluminosilicate zeolites, such as MEL (ZSM-11 (eleven)) [69], FAU (faujasite) [70][71][72], TON (Theta-1) [73], MOR (mordenite) [74] and MRE (ZSM-48 (forty-eight)) [75], with 2D lamellar structures have also been explored, although the obtained layer structures have not been downsized into the unit-cell thickness level.…”

Section: History Of 2d Zeolite Precursors and Their Derivativesmentioning

confidence: 99%

“…The successful synthesis of lamellar MFI zeolite inspired the exploration of other 2D zeolite frameworks containing heteroatoms and medium/large micropores. In the past decade, 2D lamellar zeolites with MEL [69], MOR [74], MRE [75], TON [73], and FAU [70,71] topologies have been prepared. It should be noted that these zeolites do not yet have unilamellar, multilamellar, or 2D derivative structures, unlike the 2D layered zeolites discussed in Sections 3.1-3.4 above.…”

Section: Other Types Of 2d Zeolites (Mel Fau Mor Mre Ton)mentioning

confidence: 99%

“…Lastly, nanosheets possessing an MRE zeolite topology (LMZN) were synthesized using a benzophenanthrene template and a ((C 6 H 2 ) 3 -(O-C n H 2n -N + (CH 3 ) 2 -C 6 H 12 -N(CH 3 ) 2 (Br − ))6 (denoted BPT n−6−0 ) surfactant. The nanosheets were composed of alternating ∼30 Å-thick zeolite layers and ∼40 Å -thick surfactant micelles [75].…”

Section: Other Types Of 2d Zeolites (Mel Fau Mor Mre Ton)mentioning

confidence: 99%

See 2 more Smart Citations

Two-Dimensional Zeolite Materials: Structural and Acidity Properties

Schulman

Liu

2020

Materials

View full text Add to dashboard Cite

Zeolites are generally defined as three-dimensional (3D) crystalline microporous aluminosilicates in which silicon (Si4+) and aluminum (Al3+) are coordinated tetrahedrally with oxygen to form large negative lattices and consequent Brønsted acidity. Two-dimensional (2D) zeolite nanosheets with single-unit-cell or near single-unit-cell thickness (~2–3 nm) represent an emerging type of zeolite material. The extremely thin slices of crystals in 2D zeolites produce high external surface areas (up to 50% of total surface area compared to ~2% in micron-sized 3D zeolite) and expose most of their active sites on external surfaces, enabling beneficial effects for the adsorption and reaction performance for processing bulky molecules. This review summarizes the structural properties of 2D layered precursors and 2D zeolite derivatives, as well as the acidity properties of 2D zeolite derivative structures, especially in connection to their 3D conventional zeolite analogues’ structural and compositional properties. The timeline of the synthesis and recognition of 2D zeolites, as well as the structure and composition properties of each 2D zeolite, are discussed initially. The qualitative and quantitative measurements on the acid site type, strength, and accessibility of 2D zeolites are then presented. Future research and development directions to advance understanding of 2D zeolite materials are also discussed.

show abstract

Section: History Of 2d Zeolite Precursors and Their Derivativesmentioning

confidence: 99%

Section: Other Types Of 2d Zeolites (Mel Fau Mor Mre Ton)mentioning

confidence: 99%

Section: Other Types Of 2d Zeolites (Mel Fau Mor Mre Ton)mentioning

confidence: 99%

See 1 more Smart Citation

Two-Dimensional Zeolite Materials: Structural and Acidity Properties

Schulman

Liu

2020

Materials

View full text Add to dashboard Cite

show abstract

“…5) Finally, single‐crystalline mesoporous ZSM‐5, with 3D pores and sheetlike mesopores layered along the a ‐axis were obtained using three‐armed bifunctional surfactants with three bis(quaternary ammonium)‐terminated alkyl chain branches symmetrically appended to a benzene ring and triphenylbenzene, respectively. Following the same design concept, lamellar mesostructured ZSM‐48 nanosheets were also synthesized using an amphiphilic template consisting of six tertiary‐amine‐terminated alkyl chain branches appended to one benzophenanthrene hydrophobic center . Our design concept for the fabrication of hierarchical porous zeolites provides important guidance for simultaneously governing the crystalline growth of zeolites and amphiphilic molecular self‐assembly.…”

Section: Discussionmentioning

confidence: 99%

π–π Interactions Between Aromatic Groups in Amphiphilic Molecules: Directing Hierarchical Growth of Porous Zeolites

Zhang

Che

2019

Angewandte Chemie

Self Cite

View full text Add to dashboard Cite

The development of hierarchical macro‐ or mesoporous zeolites is essential in zeolite synthesis because the size of the micropores limits mass transport and their use as industrial catalysts for bulky molecules. Although major breakthroughs have been achieved, fabricating crystallographically ordered mesoporous zeolites using a templating strategy is still an unsolved challenge. This minireview highlights our recent efforts on the self‐assembly of amphiphilic molecules to obtain ordered hierarchical MFI zeolites by introducing aromatic groups into the hydrophobic tail of the amphiphilic molecules. Owing to the geometric matching between the self‐assembled aromatic tails and the MFI framework, a) single‐crystalline mesostructured zeolite nanosheets (SCZNs), b) SCZNs with a 90° rotational intergrowth structure, c) a hierarchical MFI zeolite with a two‐dimensional square P4mm mesostructure, and d) a single‐crystalline mesoporous ZSM‐5 with three‐dimensional pores and sheetlike mesopores layered along the a‐axis were successfully synthesized.

show abstract

“…By introducing aromatic groups into the hydrophobic chain of bifunctional SDA molecules, Che et al have synthesized several lamellar MFI zeolites with different mesostructures, benefiting from the strong π-π stacking and the geometrical match between aromatic groups and MFI zeolitic frameworks [46][47][48]. This strategy of using bifunctional SDAs has been successfully extended to New Trends in Layered Zeolites DOI: http://dx.doi.org /10.5772/intechopen.86696 the synthesis of nanosheets with MTW [3], *MRE [49], and AlPO [50] frameworks, which have never been synthesized as 2D zeolites before.…”

Section: Synthesis Of Layered Zeolites With Bifunctional Amphiphilic mentioning

confidence: 99%

New Trends in Layered Zeolites

Xu¹,

Wu²

2020

Zeolites - New Challenges

View full text Add to dashboard Cite

Layered zeolites, with a flexible and changeable interlayer connection, can be modified to give a great number of derivative structures with enlarged pore sizes or enhanced external surface areas, via swelling, delamination, pillaring, or silylation. In recent years, great efforts have been devoted to the synthesis of novel-layered zeolite precursors, by using the specially designed bifunctional amphiphilic surfactants as the structure-directing agents or through the selective degradation of double four ring-containing germanosilicates. In addition, the novel modifications, such as mild delamination, interlayer expansion assisted by deconstruction-reconstruction, and layer-stacking reorganization by dissolution-recrystallization, have also been developed to create more derivatives while achieving better preservation of layer structures. Recent progresses in the field of layered zeolites are summarized in this chapter, and the challenges for future development are also proposed.

show abstract

Synthesis of Lamellar Mesostructured ZSM-48 Nanosheets

Cited by 47 publications

References 34 publications

Two-Dimensional Zeolite Materials: Structural and Acidity Properties

Two-Dimensional Zeolite Materials: Structural and Acidity Properties

π–π Interactions Between Aromatic Groups in Amphiphilic Molecules: Directing Hierarchical Growth of Porous Zeolites

New Trends in Layered Zeolites

Contact Info

Product

Resources

About