A review on the green synthesis of hierarchically porous zeolite

Maghfirah, Ainul; Ilmi, Moh. Mualliful; Fajar, Adroit T. N.; Kadja, Grandprix T.M.

doi:10.1016/j.mtchem.2020.100348

Cited by 55 publications

(24 citation statements)

References 95 publications

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“…Therefore, the calcination temperature of 500 °C was chosen for the following experiment since it is high enough for the transformation and it only uses a lower amount of electrical power. The results further showed that synthesized zeolite A was obtained using a calcination temperature of 5000 °C within two hours of airflow, which is much lower than the temperatures ranging from 550 °C–8000 °C reported in other studies of agricultural waste [ 17 , 21 ] and other materials [ 29 , 31 , 35 , 36 , 37 , 38 , 41 ].…”

Section: Resultsmentioning

confidence: 63%

“…Naturally occurring silicas found in agricultural waste are a good substitute for commercial silica precursors. Thus, raw materials from agricultural waste, such as corncob-stalk-and-leaves ash [ 12 ], rice husk ash [ 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 ], sugar cane bagasse ash [ 25 , 26 ], barley ash [ 27 ], coal ashes [ 28 , 29 , 30 , 31 , 32 , 33 , 34 ], clay minerals [ 35 , 36 , 37 , 38 , 39 , 40 ], industrial slags [ 41 ], natural zeolites [ 42 ], and solid waste incineration ashes [ 43 , 44 , 45 ], are used as alternative and cheap source materials for the synthesis of zeolite. The use of agricultural waste materials, such as those in the field of water purification and in the removal of ammonium or heavy metals, makes them appealing as useful products that contribute to the mitigation of environmental problems.…”

Section: Introductionmentioning

confidence: 99%

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Hydrothermal Synthesis and Characterization of Zeolite A from Corn (Zea Mays) Stover Ash

et al. 2021

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This study deals with the impact of calcination, alkalinity, and curing time parameters on the hydrothermal synthesis of zeolite A. The zeolite A sample, produced from corncob-stalk-and-leaves (corn stover) ash was characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermo-gravimetric analysis (TGA), and scanning electron microscopy (SEM). The results showed that calcination, alkalinity, and curing time have significant effects on the crystallization and the morphology of zeolite A. In addition, these parameters also impacted the cation exchange capacity. Furthermore, the synthesized zeolite A was obtained using a calcination temperature of 5000 °C within two hours of airflow, which is much lower than the temperatures previously reported in the literature for an agricultural waste and other waste materials. A fusion ratio of corn stover ash:NaOH of 1.0:1.5 and a curing time of nine hours were achieved. This is a major result as this curing time is much lower than those featured in other studies, which can reach up to twenty-four hours. In this paper, cubic crystal with rounded edge of zeolite A, having a cation exchange capacity of 2.439 meq Na+/g of synthesized anhydrous zeolite A, was obtained, which can be a good candidate for ion-exchange separation.

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Section: Resultsmentioning

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Hydrothermal Synthesis and Characterization of Zeolite A from Corn (Zea Mays) Stover Ash

et al. 2021

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“…Recently, hierarchical nanostructures have gained immense attention due to their multimodal versatility, such as porous architecture with high surface area, diverse functionality, synergistic interactions, multiple functionalities, and easy bottom-up synthesis method [ 127 , 128 ], which are in general difficult to achieve in cases of conventional nanomaterials. Owing to their versatility, hierarchical nanostructures have been used in areas of advanced applications, such as optoelectronics, energy harvesting, sensing, and photonics [ 129 , 130 ].…”

Section: Hierarchically Structured Fullerene Assembly For Vapor Sensor Usagementioning

confidence: 99%

Nanoarchitectonics for Hierarchical Fullerene Nanomaterials

2021

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Nanoarchitectonics is a universal concept to fabricate functional materials from nanoscale building units. Based on this concept, fabrications of functional materials with hierarchical structural motifs from simple nano units of fullerenes (C60 and C70 molecules) are described in this review article. Because fullerenes can be regarded as simple and fundamental building blocks with mono-elemental and zero-dimensional natures, these demonstrations for hierarchical functional structures impress the high capability of the nanoarchitectonics approaches. In fact, various hierarchical structures such as cubes with nanorods, hole-in-cube assemblies, face-selectively etched assemblies, and microstructures with mesoporous frameworks are fabricated by easy fabrication protocols. The fabricated fullerene assemblies have been used for various applications including volatile organic compound sensing, microparticle catching, supercapacitors, and photoluminescence systems.

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“…Organic compounds were usually served as a secondary template or porogen to assist the formation of mesopores or macropores [ 44 ] via a bottom-up strategy that was not environmentally friendly and economical. The up–down strategy could eliminate the use of mesoporogen.…”

Section: Formation Of Hierarchical Pore Structurementioning

confidence: 99%

A Brief Review on Solvent-Free Synthesis of Zeolites

2021

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The traditional hydrothermal method to prepare zeolite will inevitably use a large amount of water as a solvent, which will lead to higher autogenous pressure, low efficiency, and wastewater pollution. The solvent-free method can be used to synthesize various types of zeolites by mechanical mixing, grinding, and heating of solid raw materials, which exhibits the apparent advantages of high yield, low pollution, and high efficiency. This review mainly introduces the development process of solvent-free synthesis, preparation of hierarchical zeolite, morphology control, synthesis mechanism and applications of solvent-free methods. It can be believed that solvent-free methods will become a research focus and have enormous industrial application potential.

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A review on the green synthesis of hierarchically porous zeolite

Cited by 55 publications

References 95 publications

Hydrothermal Synthesis and Characterization of Zeolite A from Corn (Zea Mays) Stover Ash

Hydrothermal Synthesis and Characterization of Zeolite A from Corn (Zea Mays) Stover Ash

Nanoarchitectonics for Hierarchical Fullerene Nanomaterials

A Brief Review on Solvent-Free Synthesis of Zeolites

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