Application of Vibrational Spectroscopy in Clay Minerals Synthesis

Kloprogge, J. Theo

doi:10.1016/b978-0-08-100355-8.00008-4

Cited by 11 publications

(4 citation statements)

References 148 publications

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“…But the TOT-like layered structure with specific dissymmetric (hk) bands is recognizable 42 . The infrared spectra of the synthetic precursors are similar to those found in the literature for trioctahedral 2:1 clay minerals 25,44 (Figure 2). The band at 3648 cm -1 in Mg smectite precursor (Figure 2a) and at 3629 cm -1 in Ni smectite precursor (Figure 2b) is assigned vMg3OH and vNi3OH, respectively.…”

Section: Materials 1 Synthesis and Characterization Of Saponite Precursorssupporting

confidence: 80%

Crystal Growth of Smectite: A Study Based on the Change in Crystal Chemistry and Morphology of Saponites with Synthesis Time

Zhang

Petit

et al. 2019

ACS Earth Space Chem.

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.The crystal growth of smectite: A study based on the change in crystal-chemistry and morphology of saponites with synthesis time

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Section: Materials 1 Synthesis and Characterization Of Saponite Precursorssupporting

confidence: 80%

Crystal Growth of Smectite: A Study Based on the Change in Crystal Chemistry and Morphology of Saponites with Synthesis Time

Zhang

Petit

et al. 2019

ACS Earth Space Chem.

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“…The intensive peak at wave number of 1640 cm −1 is attributed to the bending vibration of water physically absorbed while the peak at 1036 cm −1 represented the Si-O stretching vibrations, which is mainly associated with Mt (Farmer, 1974). The doublet at 787 cm −1 indicates the presence of quartz impurity in the sample overlaps with a hydroxyl bending mode of montmorillonite (FeMg-OH) (Kloprogge, 2005), which has been confirmed by XRD. The small bands at 520 cm −1 is related to Ala b c d e Fig.…”

Section: Ftir Analysissupporting

confidence: 51%

Encapsulation and characterization of slow-release microbial fertilizer from the composites of bentonite and alginate

Liang

et al. 2015

Applied Clay Science

162

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“…Infrared (IR) spectroscopic techniques have long been established for the study of the clay mineral frameworks and of molecules adsorbed on their surfaces [53]. In addition, it has been applied to study the formation of clay minerals during synthesis [54]. In the studies by Vogels et al [27,31] IR spectroscopy was typically performed using an IR spectrometer equipped with an in situ diffuse reflectance infrared Fourier transform (DRIFT) accessory.…”

Section: Infrared Spectroscopy (Ir)mentioning

confidence: 99%

Urea-Assisted Synthesis and Characterization of Saponite with Different Octahedral (Mg, Zn, Ni, Co) and Tetrahedral Metals (Al, Ga, B), a Review

Ponce

Kloprogge

2020

Life

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Clay minerals surfaces potentially play a role in prebiotic synthesis through adsorption of organic monomers that give rise to highly concentrated systems; facilitate condensation and polymerization reactions, protection of early biomolecules from hydrolysis and photolysis, and surface-templating for specific adsorption and synthesis of organic molecules. This review presents processes of clay formation using saponite as a model clay mineral, since it has been shown to catalyze organic reactions, is easy to synthesize in large and pure form, and has tunable properties. In particular, a method involving urea is presented as a reasonable analog of natural processes. The method involves a two-step process: (1) formation of the precursor aluminosilicate gel and (2) hydrolysis of a divalent metal (Mg, Ni, Co, and Zn) by the slow release of ammonia from urea decomposition. The aluminosilicate gels in the first step forms a 4-fold-coordinated Al3+ similar to what is found in nature such as in volcanic glass. The use of urea, a compound figuring in many prebiotic model reactions, circumvents the formation of undesirable brucite, Mg(OH)2, in the final product, by slowly releasing ammonia thereby controlling the hydrolysis of magnesium. In addition, the substitution of B and Ga for Si and Al in saponite is also described. The saponite products from this urea-assisted synthesis were tested as catalysts for several organic reactions, including Friedel–Crafts alkylation, cracking, and isomerization reactions.

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Application of Vibrational Spectroscopy in Clay Minerals Synthesis

Cited by 11 publications

References 148 publications

Crystal Growth of Smectite: A Study Based on the Change in Crystal Chemistry and Morphology of Saponites with Synthesis Time

Crystal Growth of Smectite: A Study Based on the Change in Crystal Chemistry and Morphology of Saponites with Synthesis Time

Encapsulation and characterization of slow-release microbial fertilizer from the composites of bentonite and alginate

Urea-Assisted Synthesis and Characterization of Saponite with Different Octahedral (Mg, Zn, Ni, Co) and Tetrahedral Metals (Al, Ga, B), a Review

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