Hydrothermal synthesis of titanosilicate type zeolitic layered PLS-1 and CDS-1 molecular sieve with CDO topology

Murase, Tomoyuki; Komura, Kenichi

doi:10.1007/s10934-016-0253-5

Cited by 4 publications

(3 citation statements)

References 17 publications

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“…Meanwhile, the hydrothermal and thermal stability of the interlayer expanded structure are not as good as that of the conventional 3D structure. There are also reports about the preparing of titanosilicate of FER topology in non-aqueous alkali-free seeded system [27] or of CDO topology possessed ferrierite sheets [28]. But they only mentioned the synthesis of these materials, the catalytic properties are not involved.…”

Section: Introductionmentioning

confidence: 99%

Preparing and catalytic performance of a novel titanosilicate with FER topology

Yang¹,

Cui²,

Zhou³

et al. 2020

Mater. Res. Express

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Ti-PLS-3, a kind of layered titanosilicates of FER topology was developed by hydrothermal synthesis with the help of using pure silica PLS-3 as seed. The Si/Ti ratio of this material can be adjusted in a wide range from 20−∞. The structure and active sites of Ti-PLS-3 were detected by various characterization. After mild acid treatment to eliminate the hexa-coordinated extra-framework Ti species, the resulting material turned out to be a more effective catalyst for epoxidation of 1-hexene with H 2 O 2 than reported FER type Ti-containing material Ti-FER.

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Section: Introductionmentioning

confidence: 99%

Preparing and catalytic performance of a novel titanosilicate with FER topology

Yang¹,

Cui²,

Zhou³

et al. 2020

Mater. Res. Express

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“…The topotactic condensation is often accompanied by the removal of the organic species or guest water . Among the 245 framework structures embodied by the International Zeolite Association (IZA), the 3D zeolites STI (IZA structure framework code), MWW, , FER, − CDO, ,− SOD, − AST, MTF, NSI, RRO, − RWR, , RTH, AFO, HEU, and CAS , could be obtained by topotactic condensation of their layered precursors. Except for the precursors of the aluminophosphate AFO and the silicogermanate STI, most of the zeolite precursors are layered silicates or aluminosilicates.…”

Section: Introductionmentioning

confidence: 99%

A New Layered Silicogermanate PKU-23 and Its Transformation to a Zeolite with Three-Dimensional Channels

Wang

Firdous

et al. 2019

Crystal Growth & Design

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PKU-23, a new layered silicogermanate with eight-ring pores in the crystalline sheets, was hydrothermally synthesized under fluoride conditions by using 4-dimethylaminopyridine (DMAP) or 1-benzyl-4-dimethylaminopyridinium hydroxide (DMAP-Bn) as organic structure directing agents (OSDAs). The structure determination from single-crystal X-ray diffraction showed the PKU-23 was a layered material with the double four-ring (d4r) units connected by the interrupted zigzag chains. The layers in PKU-23 were found to stack by simple translation. The OSDA cations were occluded between the adjacent layers. The topotactic condensation of layered PKU-23 resulted in a three-dimensional (3D) zeolite PKU-23-Z, which possessed a 10 × 8 × 8 channel system. The framework topology of PKU-23-Z is the same as zeolite ECNU-16. PKU-23 is the first reported zeolite precursor that could form a 3D channel system after topotactic condensation.

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“…Our groups have been interested in the synthesis of metal incorporated CDS‐1 zeolites possessing CDO ‐type topology and their applications for heterogeneous catalyst . The demand for new synthetic strategy of zeolitic precursor PLS‐1 and CDS‐1 zeolite encourages us to change a mind for preparing method from HTS to DGC, because the HTS synthesis of PLS‐1 crystal using H‐kanemite requires very small amount of water; usually the ratio of H 2 O/H‐kanemite = 5.0.…”

Section: Introductionmentioning

confidence: 99%

Large Crystals Synthesis of Siliceous Layered Zeolitic PLS‐1 and CDS‐1 Zeolite by Dry Gel Conversion Method

Banno

Komura

2018

Crystal Research and Technology

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The large crystal of siliceous zeolitic layered PLS-1, which is a precursor of CDS-1 zeolite with CDO-type topology, can be successfully prepared by dry-gel conversion (DGC) method from a dry-gel containing layered silicate H-kanemite and tetramethylammonium hydroxide (TMAOH) as an organic structure-directing agent (OSDA), and it allows transform to CDS-1 zeolite by calcination with retaining its large crystal particle. Characterizations of the obtained CDS-1 zeolite reveal the different morphology compared by conventional methods. Its particle is found to be aggregated by an enlarged thickness of layered crystals reflecting a zeolitic precursor of PLS-1. Gradual increases of nitrogen adsorption at around middle pressure and FE-SEM measurements strongly indicate that the obtained particles have many steps and aperture like card-house assembly of layered PLS-1 large crystals.

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Hydrothermal synthesis of titanosilicate type zeolitic layered PLS-1 and CDS-1 molecular sieve with CDO topology

Cited by 4 publications

References 17 publications

Preparing and catalytic performance of a novel titanosilicate with FER topology

Preparing and catalytic performance of a novel titanosilicate with FER topology

A New Layered Silicogermanate PKU-23 and Its Transformation to a Zeolite with Three-Dimensional Channels

Large Crystals Synthesis of Siliceous Layered Zeolitic PLS‐1 and CDS‐1 Zeolite by Dry Gel Conversion Method

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