Synthesis and Characterization of Al-TON Zeolite Using a Dialkylimizadolium as Structure-Directing Agent

Lopes, Christian Wittee; Villarroel-Rocha, Jhonny; Silva, Bernardo Araldi da; Mignoni, Marcelo Luís; Pergher, Sibele B. C.

doi:10.1590/1980-5373-mr-2016-0041

Cited by 6 publications

(3 citation statements)

References 28 publications

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“…The observed diffraction angles were in good agreement with previous reports, thereby confirming the crystalline state of the aluminosilicates. As reported earlier, three notable diffraction peaks in the range of 15 to 35 degrees indicated the face-centered spherical crystalline index of the aluminoslicate 35,36 . However, the diffraction lines of (100) and indicated lattice fringes that correspond to the planes of a cubic structure 37 .…”

Section: X-ray Diffraction Spectroscopy (Xrd) Aluminosilicate Nanocosupporting

confidence: 73%

Aluminosilicate Nanocomposites from Incinerated Chinese Holy Joss Fly Ash: A Potential Nanocarrier for Drug Cargos

Ramanathan

Gopinath

Arshad

et al. 2020

Sci Rep

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An incredible amount of joss fly ash is produced from the burning of Chinese holy joss paper; thus, an excellent method of recycling joss fly ash waste to extract aluminosilicate nanocomposites is explored. The present research aims to introduce a novel method to recycle joss fly ash through a simple and straightforward experimental procedure involving acidic and alkaline treatments. The synthesized aluminosilicate nanocomposite was characterized to justify its structural and physiochemical characteristics. A morphological analysis was performed with field-emission transmission electron microscopy, and scanning electron microscopy revealed the size of the aluminosilicate nanocomposite to be ~25 nm, while also confirming a uniformly spherical-shaped nanostructure. The elemental composition was measured by energy dispersive spectroscopy and revealed the Si to Al ratio to be 13.24 to 7.96, showing the high purity of the extracted nanocomposite. The roughness and particle distribution were analyzed using atomic force microscopy and a zeta analysis. X-ray diffraction patterns showed a synthesis of faceted and cubic aluminosilicate crystals in the nanocomposites. The presence of silica and aluminum was further proven by X-ray photoelectron spectroscopy, and the functional groups were recognized through Fourier transform infrared spectroscopy. The thermal capacity of the nanocomposite was examined by a thermogravimetric analysis. In addition, the research suggested the promising application of aluminosilicate nanocomposites as drug carriers. The above was justified by an enzyme-linked apta-sorbent assay, which claimed that the limit of the aptasensing aluminosilicateconjugated ampicillin was twofold higher than that in the absence of the nanocomposite. The drug delivery property was further justified through an antibacterial analysis against Escherichia coli (gramnegative) and Bacillus subtilis (gram-positive). An increasing amount of fly ash is being produced at an alarming rate throughout the world, and it is not a simple subject to be neglected. More than 90 million tons of fly ash are being produced annually in India, China and the USA and ~50,000 acres of land are used for ash ponds 1. Apart from coal combustion in thermal power plants, joss paper fly ash also shows a significant contribution toward tremendous fly ash accumulation. Joss paper has been used since the time of the six dynasties, and it is widely burned by the Chinese population during their festivals and funerals as a notable tradition. An estimated 90,000 to 220,000 tons of joss paper is burned each year. Although the exact figure has not been identified, it is one of the main causes of air pollution, predominantly in China and Taiwan. Efforts toward the invention of ecofriendly burning furnaces with high-efficiency incinerators, to reduce the release of heavy metals from fly ash, are not disregarded but have never met the expected objective 2,3. Several efforts have been shown for the disposal or recycling of joss fly ash. The consumption of fly ash...

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Section: X-ray Diffraction Spectroscopy (Xrd) Aluminosilicate Nanocosupporting

confidence: 73%

Aluminosilicate Nanocomposites from Incinerated Chinese Holy Joss Fly Ash: A Potential Nanocarrier for Drug Cargos

Ramanathan

Gopinath

Arshad

et al. 2020

Sci Rep

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“…Recently, Wen et al [19] noted that the size of 1butyl-3-methylimidazolium (one of the most investigated ionic liquids found in literature [30,31]) is consistent with the channel size of TON, what makes it a good candidate as structure-directing agent for this topology. Indeed, this behavior was confirmed by our group in the synthesis of TiO 2 and Al-containing TON zeolite in hydroxide media [10,11].…”

Section: Introductionsupporting

confidence: 60%

Fluoride-mediated synthesis of TON and MFI zeolites using 1-butyl-3-methylimidazolium as structure-directing agent

Lopes

Gómez‐Hortigüela²,

Rojas

et al. 2017

Microporous and Mesoporous Materials

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“…Using a similar procedure, the synthesis of Al-containing ZSM-22 was studied by adding aluminum salt to the starting gel. Lopes et al (2016) reported the synthesis of the Al-TON structure using 1-butyl-3-methylimidazolium chloride as OSDA. This organic cation showed greater efficiency and selectivity for the synthesis of TON zeolites under different reaction conditions compared to 1,8-diaminooctane (a traditional OSDA).…”

Section: Introductionmentioning

confidence: 99%

Different approaches to the synthesis of ZSM-22 zeolite with application in n-heptane cracking

Júnior

Ribeiro

Silva

et al. 2022

RSD

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The synthesis of ZSM-22 zeolite has been extensively studied due to its properties of form selectivity, acidity and hydrothermal stability, which is applied in important reactions in the areas of petroleum refining and petrochemicals. In view of this, the present work studied different approaches of synthesis of ZSM-22 using: 1-diaminohexane as a structure directing agent, (ii) methanol and seed crystals, (iii) aging of the synthesis gel with addition of polymer, surfactant and silane and (iv) starch, calcium carbonate and silanized silica with subsequent desilication. Thus, the effects of these methodologies on the textural properties, acidity and catalytic activity of the zeolites obtained were evaluated. The samples were characterized by X-ray diffraction (XRD), nitrogen adsorption-desorption, scanning electron microscopy (SEM), ammonia desorption at programmed temperature (NH3-TPD) and thermal analysis (TG/DTG). The catalytic activity and selectivity of the catalysts were evaluated in the model catalytic cracking reaction of n-heptane at 650 °C for 180 min. The synthesis route using methanol and seed crystals allowed obtaining ZSM-22 in 3 h of crystallization, drastically reducing the synthesis time compared to other methodologies. Despite this, the use of 1-diaminohexane led to the obtaining of zeolite with textural properties, acidity and catalytic activity superior to the other samples. The generation of mesoporosity was obtained through the use of silanized silica and subsequent desilication, leading to greater catalytic stability and less deactivation by coke. All catalysts showed similar selectivity to the formation of compounds in the range C2 to C4.

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Synthesis and Characterization of Al-TON Zeolite Using a Dialkylimizadolium as Structure-Directing Agent

Cited by 6 publications

References 28 publications

Aluminosilicate Nanocomposites from Incinerated Chinese Holy Joss Fly Ash: A Potential Nanocarrier for Drug Cargos

Aluminosilicate Nanocomposites from Incinerated Chinese Holy Joss Fly Ash: A Potential Nanocarrier for Drug Cargos

Fluoride-mediated synthesis of TON and MFI zeolites using 1-butyl-3-methylimidazolium as structure-directing agent

Different approaches to the synthesis of ZSM-22 zeolite with application in n-heptane cracking

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