A Simple “Nano-Templating” Method Using Zeolite Y Toward the Formation of Carbon Schwarzites

Boonyoung, Pawan; Kasukabe, Takatoshi; Hoshikawa, Yasuto; Berenguer-Murcia, Ángel; Cazorla‐Amorós, Diego; Boekfa, Bundet; Nishihara, Hirotomo; Kyotani, Takashi; Nueangnoraj, Khanin

doi:10.3389/fmats.2019.00104

Cited by 16 publications

(13 citation statements)

References 28 publications

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“…These materials have been used for cleaning up polluted water; plastic wastes and biomass gasification residues to chars and activated carbon are also attracting a lot of attention (Bazargan et al, 2013;Benedetti et al, 2019). Of late, some new adsorbent materials such as graphenes (Kyzas et al, 2018;Abu-Nada et al, 2020), carbon nanotubes (Gupta et al, 2013), MCM-41 (Lam et al, 2007), schwartzites (Boonyoung et al, 2019) have also been reported in the literature as high capacity adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Char Products From Bamboo Waste Pyrolysis and Acid Activation

Parthasarathy¹,

Mackey²,

Mariyam³

et al. 2021

Front. Mater.

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Bamboo is found worldwide but is especially concentrated in tropical and subtropical areas with the major producing nations being China, Indonesia and Thailand with an annual production of 12 million tonnes. It has found uses in many applications such as: furniture, flooring, roofing, fencing, interior design and scaffolding in the construction industry. In this study, discarded waste bamboo furniture was used in the ground form as the raw material feedstock for the production of a series of biochars and activated carbons. The biochars were produced at different temperatures, namely, 723, 823, 923, 1,023, 1,123 and 1223 K, in a muffle furnace inerted with nitrogen and for different pyrolysis times. The product chars yields were 20–30% by weight of the raw material, surface areas were 100–350 m2/g. Other tests include elemental analysis, helium displacement density, pH, ICP-AES on a leachate sample. Four of the different temperature samples of biochar were used to adsorb the basic dye methylene blue and were shown to possess high adsorption capacities. Then, the same bamboo raw material powder was treated with acid and pyrolysed/activated in a nitrogen atmosphere at the same range of temperatures to produce activated carbons; these were characterized using similar test methods to the biochars. The yields are in the range 20–40% by weight of the raw material feedstock and the BET surface areas are in the range 200–600 m2/g. Three of the different temperature activated carbons were used to adsorb methylene blue and the results were compared with the biochar results. All the adsorption experimental isotherm results were analyzed using conventional isotherm equations. The benefits and cost implications of both biochar and activated carbon routes are discussed. The methylene blue adsorption capacities are extremely attractive in the range 0.42–1.12 mmol/g (150–300 mg/g char product) and extend to over 2.35 mmol/g (700 mg/g) for the bamboo derived activated carbons. The micropore and mesopore volumes have been determined under the various char and activated carbon experimental conditions and coupled with the surface areas; these results have been used to explain the trends in the methylene blue adsorption capacities.

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Section: Introductionmentioning

confidence: 99%

Char Products From Bamboo Waste Pyrolysis and Acid Activation

Parthasarathy¹,

Mackey²,

Mariyam³

et al. 2021

Front. Mater.

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“…On the basis of molecular simulations, it was recently proposed that the structure of the ZTC forming within larger zeolite crystals would differ (less dense structure) to that developing within small crystals (denser structure). 15 The authors compared zeolite crystals of 40 vs. 300 nm, which might not present a sufficiently important size difference to observe a real impact of the crystal size on structural quality. Indeed, independently of the crystal size ethylene does not face diffusion limitations in large pore zeolites.…”

Section: Introductionmentioning

confidence: 99%

Impact of the crystal size of beta zeolite on the structural quality of zeolite templated carbons

Aumond

Esteves

Pouilloux

et al. 2022

Microporous and Mesoporous Materials

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The impact of the crystal size of the template zeolite on the textural properties of resulting Zeolite Templated Carbons was studied using nano-(20 nm) and micron-sized (5 µm) zeolite beta crystals. ZTCs were obtained for both nano-and micron-sized zeolite beta crystals, yet for the micron-sized sample the presence of supermicropores and small mesopores was detected, indicating a higher degree of structural defects during the templating process and hence in the final ZTC. The insights gained from nitrogen physisorption were confirmed by TEM, TGA and XPS. Despite, long range structural order, evidenced by X-ray powder diffraction (XRD) for both, nano-and micron-sized ZTCs was inferred. These results suggests that XRD patterns allow to evidence the well-ordered part of the sample but might not be the method of choice for characterizing the structural quality of ZTCs. Simulated XRD powder patterns allowed to propose a graphene-based nanoribbon structure grown in the zeolite pores as a satisfactory model for ZTCs in beta zeolite.

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“…For a long time TPMSs remained quite abstract objects; however, in the last few years, they have attracted great interest as models for potential porous materials possessing valuable physical properties (Park & Lee, 2019;Zheng et al, 2018), or playing a template role in chemical syntheses (Braun et al, 2018;Boonyoung et al, 2019) and manufacturing of metamaterials (Al-Ketan & Abu Al-Rub, 2019). However, no methods for the comprehensive generation of TPMSs have been proposed and the practical applications mainly rest upon several TPMSs for which the analytical functions are known, in particular, primitive (P), diamond (D) and gyroid (G) surfaces (Abueidda et al, 2017;Maskery et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Generating triply periodic surfaces from crystal structures: the tiling approach and its application to zeolites

et al. 2022

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Physical properties of objects depend on topological features of the corresponding triply periodic surfaces; thus topological exploration and classification of the surfaces has practical relevance. A general method is developed for generating triply periodic surfaces from triply periodic crystal structures. A triply periodic surface is derived from the natural tiling of a crystal network by an appropriate removal of some tile faces and subsequent smoothing of the resulting facet surface. The labyrinth nets of a generated triply periodic surface are built from the natural tiling, and in turn the topological parameters of the labyrinth nets are used to determine if the surface is isomorphic to a minimal surface. This method has been applied to all known 253 zeolite frameworks and 98 triply periodic surfaces were obtained, which belong to 55 topological types. Twelve surfaces were found to be isomorphic to already known triply periodic minimal surfaces (TPMSs), while four surfaces can be treated as isomorphic to new TPMSs. A procedure has also been developed for transferring the generated surfaces to a 3D-printer-readable format.

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A Simple “Nano-Templating” Method Using Zeolite Y Toward the Formation of Carbon Schwarzites

Cited by 16 publications

References 28 publications

Char Products From Bamboo Waste Pyrolysis and Acid Activation

Char Products From Bamboo Waste Pyrolysis and Acid Activation

Impact of the crystal size of beta zeolite on the structural quality of zeolite templated carbons

Generating triply periodic surfaces from crystal structures: the tiling approach and its application to zeolites

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