Preparation and characterization of Fe,Co,Si-pillared montmorillonites with aminosilanes as silicon pillars precursor

Fang, Liang; Wang, Li; Zhou, Tao; Liu, Lihua; Zhou, Jian; Li, Menglin

doi:10.1016/j.clay.2017.02.006

Cited by 21 publications

(4 citation statements)

References 64 publications

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“…Montmorillonite was pillared in order to obtain catalyst supports or catalyst. Polyhydroxymetal ions were normally used as pillaring agent such as Al, Fe, Zn, Mn, Co, and Si [6], [7], [8]. These metal ions were able to separate the layer of clay and thus increasing the surface area, porosity, and acid sites of the clay.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Immobilized Molybdenum Complex on Pillared Montmorillonite K-10

Harun¹,

Nor²,

Othman³

2018

MJoSHT

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This study was carried out to immobilize molybdenyl (VI) acetylacetonate (MoO2(acac)2) complex on alumina pillared montmorillonite K-10 (MMT K-10). Pillar MMT K-10 was produced by introducing MMT K-10 with a hydrolysis solution of NaOH with AlCl3. Different concentrations of pillaring solution were prepared in terms of OHto Al3+ ratio (0.5, 1.0, 1.5 and 2.0) to observe the structural characteristics of MMT K-10. The pillared materials were then immobilized with 0.1 M MoO2(acac)2 and were characterized using X-ray diffractometry (XRD), scanning electron microscopy coupled in an energy dispersive X-ray spectrometer (SEM-EDX) and Fourier transform infrared spectroscopy with attenuated total reflection (FTIR-ATR) techniques. FTIR bands at ca. 890 – 930 cm-1 indicate that the Mo complex was immobilized on the surface of pillared MMT K-10 not in between the layers. This is supported by the SEM and XRD analysis where the SEM micrograph showed deposition of Mo on the surface of MMT K-10 as well as no modification of basal spacing was observed by XRD. Meanwhile, the d(001) spacing of the alumina pillared MMT K10 samples were seen to increase slightly as the concentration of OH/Al3+ increased.

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Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Immobilized Molybdenum Complex on Pillared Montmorillonite K-10

Harun¹,

Nor²,

Othman³

2018

MJoSHT

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“…However, due to the inorganic nature of bentonite, it is not compatible with organic media and, hence, requires being organo-modified [ 7 , 8 , 9 , 10 ]. Many different methods, including ion exchange [ 11 , 12 ], grafting of organic compounds [ 13 , 14 ], acid–base reactions [ 15 ], pillaring by different types of polycations [ 16 , 17 ], ion-dipole interaction [ 11 , 18 ], etc., were applied to modify the bentonite minerals. Among these, the conventional wet cation exchange technique has been commercialized and widely used for the synthesis of organo-montmorillonite (OMMT).…”

Section: Introductionmentioning

confidence: 99%

Mechanochemical Synthesis of Rosin-Modified Montmorillonite: A Breakthrough Approach to the Next Generation of OMMT/Rubber Nanocomposites

2021

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The current investigation presents a green mechanochemical procedure for the synthesis of a special kind of rubber-compatible organo-montmorillonite (OMMT) for use in the inner liner compound of tires. The compatibility character of the OMMT arises from the mechanochemical reaction of the raw bentonite mineral and gum rosin as some of the organic constituents of the inner liner composition. The monitoring of OMMT synthesis by various characterization techniques reveals that gum rosin gradually intercalates into the montmorillonite (MMT) galleries during milling and increases the interlayer spacing to 41.1 ± 0.5 Å. The findings confirm the simultaneous formation of single- or few-layered OMMT platelets with average sizes from the sub-micron range up to several micrometers during the milling process. The mechanical properties of the OMMT/rubber nanocomposite, such as tensile strength, tear resistance and elongation, present a good enhancement in comparison to the un-modified material. Moreover, the organo-modification of the inner liner composition also leads to a property improvement of about 50%.

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“…In recent years, the method of surface functionalization with silicone compounds for the purpose of enhancing the selectivity has been used for clay minerals of different types of structure: with aluminosilicalayer 1:1 of kaolinite group minerals [11,12]; with layer 2:1 of montmorillonite group minerals [13][14][15][16], fibrous silicates of palygorskite group [17][18][19] and synthetic clay minerals [20,21]. At the same time, due to the structural peculiarities of clay minerals, the processes of their surface functionalization have a series of significant distinctions from those of silica-based sorbents [22].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Uranium (VI) from Aqueous Solutions by Amino-functionalized Clay Minerals

Тобілко

Spasonova

Kovalchuk

et al. 2019

Colloids and Interfaces

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Silylation of clay minerals from Cherkasy deposit (Ukraine) montmorillonite (layer silicate) and palygorskite (fibrous silicate) was performed using organosilane (3-aminopropyl)triethoxysilane (APTES). Solvents with different polarity (ethanol, toluene) were used in synthesis. The structure of modified minerals was characterized by complex of methods (X-ray powder diffraction, Fourier transform infrared spectroscopy, nitrogen adsorption-desorption at −196 °C and thermal analysis). Studies of adsorption characteristics of APTES-modified clay minerals were carried out in relation to uranium (VI). The results indicated that modified montmorillonite and palygorskite were effective materials for water purification from UO22+.

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Preparation and characterization of Fe,Co,Si-pillared montmorillonites with aminosilanes as silicon pillars precursor

Cited by 21 publications

References 64 publications

Preparation and Characterization of Immobilized Molybdenum Complex on Pillared Montmorillonite K-10

Preparation and Characterization of Immobilized Molybdenum Complex on Pillared Montmorillonite K-10

Mechanochemical Synthesis of Rosin-Modified Montmorillonite: A Breakthrough Approach to the Next Generation of OMMT/Rubber Nanocomposites

Adsorption of Uranium (VI) from Aqueous Solutions by Amino-functionalized Clay Minerals

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