Graphene Oxide Facilitates Solvent‐Free Synthesis of Well‐Dispersed, Faceted Zeolite Crystals

Li, Hui; Liu, Xing; Qi, Siqi; Xu, Linli; Shi, Guosheng; Ye, Ding; Yan, Xiaoying; Huang, Yong; Geng, Jianxin

doi:10.1002/ange.201707823

Cited by 22 publications

(19 citation statements)

References 47 publications

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“…The use of additives can also effectively tailor the aspect ratio of zeolite crystals. Different types of additives, including alcohol, 38,39 tributylphosphine oxide, 40 graphene oxide, 41 peptoids, 42 and amino acid arginine, 43 were employed to modify crystal morphology of different types of zeolites. Although some positive results were published, a dramatic change in the aspect ratio between different faces was not reported to the best of our knowledge.…”

Section: Introductionmentioning

confidence: 99%

Platelike MFI Crystals with Controlled Crystal Faces Aspect Ratio

et al. 2021

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Zeolite crystals offering a short diffusion pathway through the pore network are highly desired for a number of catalytic and molecule separation applications. Herein, we develop a simple synthetic strategy toward reducing the thickness along b-axis of MFI-type crystals, thus providing a short diffusion path along the straight channel. Our approach combines preliminary aging and a fluoride-assisted low-temperature crystallization. The synthesized MFI crystals are in the micron-size range along a-and c-axis, while the thickness along the b-axis is a few tens of nanometers. The synthesis parameters controlling the formation of plate-like zeolite are studied, and the factors controlling the zeolite growth identified. The synthesis strategy works equally well with all-silica MFI (silicalite-1) and its Al-and Ga-containing derivatives. The catalytic activity of plate-like ZSM-5 in the methanol-to-hydrocarbons (MTH) reaction is compared with a commercial nano-sized ZSM-5 sample, as the plate-like ZSM-5 exhibits a substantially extended lifetime. The synthesis of plate-like MFI crystals is successfully scaled up to a kilogram scale.

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Section: Introductionmentioning

confidence: 99%

Platelike MFI Crystals with Controlled Crystal Faces Aspect Ratio

et al. 2021

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“…We followed the MD calculation of aqueous interfaces described in refs. ,− A classical MD simulation system, which consists of a monolayer of 120 four-carbon-long alkyl chains and ∼4 nm layer of water (2656 molecules), is displayed in Figure a. The four-carbon-long alkyl chains are arranged as the (111) face of an FCC lattice with a packing density (Σ) of 5 nm –2 .…”

Section: Resultsmentioning

confidence: 99%

Sharing of Na⁺ by Three −COO^– Groups at Deprotonated Carboxyl-Terminated Self-Assembled Monolayer-Charged Aqueous Interface

Liu

Huang

et al. 2018

J. Phys. Chem. C

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By combining theoretical calculations and experimental observations, we show that Na + can be shared by three charged −COO − groups of the deprotonated carboxyl-terminated self-assembled monolayers in aqueous solution at lipid−aqueous interface. This is similar to the sharing structure of Na + usually found in crystals. Notably, this ionic configuration leads to a hydroxyl orientation distribution of interfacial water molecules, showing a maximum toward the bulk solution, in addition to the maximum toward the charged surface expected based on the structure of one-to-one ion-pair formation between Na + and −COO − . Our results provide new insights for a better understanding of electrochemically and biologically related charged interfaces at the molecular level and should be helpful to design the nanodevices and bioinspired human-made nanomaterials.

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“…The mesopore and/or macropore templates are firstly imbedded within the zeolite precursor slurry and then removed after the zeolite formation to free additional porosity. Depending on the rigidity (solid or liquid) of mesopore and/or macropore templates, these synthesis strategies can be classified into the hard templating route ,− ...…”

Section: Synthesismentioning

confidence: 99%

“…The hard templating route produces zeolites with high crystallinity, uniform additional porosity, and a tailorable porous structure. The hard templating route is very suitable to fabricate hierarchical titanosilicate zeolites due to the special nature of the titanium species under either acid or alkali leaching treatments. , Carbonaceous materials, ,− polymers/aerogel/resin, − inorganic solid materials, − …”

Section: Synthesismentioning

confidence: 99%

Hierarchically Structured Zeolites: From Design to Application

et al. 2020

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Hierarchical zeolites combine the intrinsic catalytic properties of microporous zeolites and the enhanced access and transport of the additional meso-and/or macroporous system. These materials are the most desirable catalysts and sorbents for industry and become a highly evolving field of important current interests. In addition to the enhanced mass transfer leading to high activity, selectivity, and cycle time, another essential merit of the hierarchical structure in zeolite materials is that it can significantly improve the utilization effectiveness of zeolite materials resulting in the minimum energy, time, and raw materials consumption. Substantial progress has been made in the synthesis, characterization, and application of hierarchical zeolites. Herein, we provide an overview of recent achievements in the field, highlighting the significant progress in the past decade on the development of novel and remarkable strategies to create an additional pore system in zeolites. The most innovative synthesis approaches are reviewed according to the principle, versatility, effectiveness, and degree of reality while establishing a firm link between the preparation route and the resultant hierarchical pore quality in zeolites. Zeolites with different hierarchically porous structures, i.e., micro-mesoporous structure, micromacroporous structure, and micro-meso-macroporous structure, are then analyzed in detail with concrete examples to illustrate their benefits and their fabrications. The significantly improved performances in catalytic, environmental, and biological applications resulting from enhanced mass transport properties are discussed through a series of representative cases. In the concluding part, we envision the emergence of "material-properties-by-quantitative and real rational design" based on the "generalized Murray's Law" that enables the predictable and controlled productions of bioinspired hierarchically structured zeolites. This Review is expected to attract important interests from catalysis, separation, environment, advanced materials, and chemical engineering fields as well as biomedicine for artificial organ and drug delivery systems.

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Graphene Oxide Facilitates Solvent‐Free Synthesis of Well‐Dispersed, Faceted Zeolite Crystals

Cited by 22 publications

References 47 publications

Platelike MFI Crystals with Controlled Crystal Faces Aspect Ratio

Platelike MFI Crystals with Controlled Crystal Faces Aspect Ratio

Sharing of Na⁺ by Three −COO^– Groups at Deprotonated Carboxyl-Terminated Self-Assembled Monolayer-Charged Aqueous Interface

Hierarchically Structured Zeolites: From Design to Application

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Graphene Oxide Facilitates Solvent‐Free Synthesis of Well‐Dispersed, Faceted Zeolite Crystals

Cited by 22 publications

References 47 publications

Platelike MFI Crystals with Controlled Crystal Faces Aspect Ratio

Platelike MFI Crystals with Controlled Crystal Faces Aspect Ratio

Sharing of Na+ by Three −COO– Groups at Deprotonated Carboxyl-Terminated Self-Assembled Monolayer-Charged Aqueous Interface

Hierarchically Structured Zeolites: From Design to Application

Contact Info

Product

Resources

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Sharing of Na⁺ by Three −COO^– Groups at Deprotonated Carboxyl-Terminated Self-Assembled Monolayer-Charged Aqueous Interface