The influence of mechanical activation on the nanostructure of zeolite

Bohács, Katalin; Kristály, Ferenc; Mucsi, Gábor

doi:10.1007/s10853-018-2502-2

Cited by 12 publications

(8 citation statements)

References 26 publications

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“…Near 1040, 785, and 463 cm -1 , additional bands can be seen. The 1040 cm -1 band corresponds to asymmetric stretching vibration modes of internal T-O bonds in TO 4 tetrahedra (T = Si and Al) as previous authors have always described [11,15]. The 785 and 463 cm -1 bands are assigned to the stretching vibration modes of O-T-O groups and the bending vibrations of T-O bonds [16].…”

Section: Results and Discussion Characterization Of Zeolitementioning

confidence: 99%

“…The hydroxyl of illite [11], silanol, or aluminol (Si-O(H)-Al bridging hydroxyls) groups associated to Broensted acidity [14] are assigned to the band over 3600 cm -1 . The water molecules linked to the native zeolite structure are responsible for the bands at 3443 and 1635 cm -1 [11,15]. Near 1040, 785, and 463 cm -1 , additional bands can be seen.…”

Section: Results and Discussion Characterization Of Zeolitementioning

confidence: 99%

“…Mechanical activation of natural zeolite leads to amorphous products with a higher surface area and adsorption properties than raw zeolite [8,9]. Previous references [10,11] provide contradictory results in the sorption research of mechanically milled clinoptilolite. The mechanically amorphized clinoptilolite's cation exchange capacity (CEC) increased, according to Zolzaya et al [10].…”

Section: Introductionmentioning

confidence: 99%

“…The mechanically amorphized clinoptilolite's cation exchange capacity (CEC) increased, according to Zolzaya et al [10]. In contrast, Bohacs et al discovered that methylene blue adsorption is maintained in mechanically activated clinoptilolite [11]. Mechanical amorphization can be accomplished by milling the crystalline compounds alone or in conjunction with other crystalline compounds; however, in the latter case, the mechanochemical production of a new amorphous or crystalline compound is also possible.…”

Section: Introductionmentioning

confidence: 99%

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Influence of co-milling oxide physical properties on the structural changes of natural clinoptilolite zeolites

Natsagdorj,

Lkhagvasuren,

Munkhjargal

et al. 2023

Mong. J. Chem.

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Zeolites are a family of open-framework aluminosilicate minerals used in many diverse fields, including building materials, agriculture, water treatment, and catalysis. In this study, natural zeolites were mechano-chemically treated by co-milling with corundum and cristobalite. The idea behind the study was that co-milling with high-hardness oxides would cause natural zeolite to undergo more structural distortion, potentially increasing its reactivity and sorption capabilities. Corundum has a density of 3.95 g/cm3 and a hardness of 9, while cristobalite has a density of 2.27 g/cm3 and a hardness of 6-7, according to the Mohs hardness scale. In a planetary ball mill, the zeolites and 20 wt.% of various oxides were co-ground for 30 min. The grinding media used were hardened steel balls with a weight ratio of 20:1 between the balls and the minerals. Raw minerals and milled products were evaluated using X-ray diffraction, Fourier-transform infrared spectroscopy and scanning electron microscopy. It revealed that co-milling with different hardness oxides had a minor effect on the structural distortion of raw zeolite. Crystallite size reduction and amorphization were observed in high hardness oxides rather than in zeolite particles. After milling, the amorphization of natural zeolite milled alone was 30.4%, while no significant amorphization was observed when co-milled with corundum and cristobalite. Preliminary results of Cr(VI) adsorption tests on raw and milled zeolites indicate that co-milling with high-hardness oxides is not the preferred method to enhance the activity of natural zeolite.

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Section: Results and Discussion Characterization Of Zeolitementioning

confidence: 99%

Section: Results and Discussion Characterization Of Zeolitementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of co-milling oxide physical properties on the structural changes of natural clinoptilolite zeolites

Natsagdorj,

Lkhagvasuren,

Munkhjargal

et al. 2023

Mong. J. Chem.

View full text Add to dashboard Cite

show abstract

“…Peinecke et al [37] and Romero and Huot [38] analyze the effect of high-energy milling in the hydrogen absorption-desorption properties of, respectively, a metal hydride Na 3 AlH 6 and a TiFe alloy, both doped with different additives. Finally, the last group of papers deals with the milling effect in the characteristics and properties of different materials with potential technological applications including antifungal calcium zinc hydroxide dihydrate [39], the sintering of commercial PZT powders [40] and the activation of natural zeolite powders [41] as well as for the recovery of Co and Li, from spent lithium ion batteries [42] and aluminum from natural pyrophyllite ore [43].…”

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confidence: 99%