Supercritical hydrothermal flow synthesis of xonotlite nanofibers

Díez-Garcia, Marta; Gaitero, Juan J.; Santos, José Ignacio; Dolado, Jorge S.; Aymonier, Cyril

doi:10.1007/s41981-018-0012-7

Cited by 11 publications

(17 citation statements)

References 34 publications

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“…The product obtained under supercritical conditions was compared to the one obtained under subcritical conditions at 300 8Ca nd 25 MPa for 20 seconds. [60] Under subcritical conditions, ap oorly crystalized xonotlitei so btained. Under supercritical conditions, instead, highly crystallinea nd pure xonotlite is produced.…”

Section: Scw For the Synthesis Of Xonotlitementioning

confidence: 97%

“…The reaction occurs in just 20 seconds. The product obtained under supercritical conditions was compared to the one obtained under subcritical conditions at 300 °C and 25 MPa for 20 seconds . Under subcritical conditions, a poorly crystalized xonotlite is obtained.…”

Section: Ultra‐fast Continuous Synthesis Of Minerals In Scwmentioning

confidence: 99%

“…X-ray diffraction patterns of xonotlites ynthesized at 300 and 400 8Cc ompared with the reference (PDF 00-023-0125). Reprinted with permissionfrom Ref [60]…”

mentioning

confidence: 99%

“…a) GeneralT EM vision of the synthetic xonotlite nanofibers synthesized under supercritical conditionsb)HR-TEM analysisoft he synthetic xonotlite fibers and identificationo ft wo characteristic planes of the synthetic xonotlite structure. Reprintedw ith permission from Ref [60]…”

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confidence: 99%

“…Direct pulse (left) and cross-polarized (right) Blacka nd red linescorrespond to experimental and fittingr esults,r espectively.b) 1 HM AS NMR spectra ofs ynthetic xonotlite. Reprintedw ith permission from Ref [60]…”

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confidence: 99%

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Continuous Synthesis of Nanominerals in Supercritical Water

Claverie

Díez-Garcia

Martin

et al. 2019

Chemistry A European J

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The synthesis of minerals should play a crucial role in the development of new and advanced materials. Since 2016, a renewal of interest to enlarge the mineral synthesis towards industrial requirements has been observed, especially thanks to three main recent papers. The innovative process exposed combines a continuous process with the use of supercritical water. In addition to curtail synthesis times, this process offers a control on the particle characteristics (size, crystallinity, structure, etc.) and a capacity to be easily transferable at an industrial scale. This innovative concept is demonstrated with the synthesis of three minerals which are the talc (a phyllomineral), the xonotlite and the tobermorite (two inominerals). This article proposes an overview of the possibilities to synthesize nanominerals in continuous processing for the development of advanced materials with promising industrial applications.

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Section: Scw For the Synthesis Of Xonotlitementioning

confidence: 97%

Section: Ultra‐fast Continuous Synthesis Of Minerals In Scwmentioning

confidence: 99%

“…X-ray diffraction patterns of xonotlites ynthesized at 300 and 400 8Cc ompared with the reference (PDF 00-023-0125). Reprinted with permissionfrom Ref [60]…”

mentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Continuous Synthesis of Nanominerals in Supercritical Water

Claverie

Díez-Garcia

Martin

et al. 2019

Chemistry A European J

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Correlation between the Dynamics of Nanoconfined Water and the Local Chemical Environment in Calcium Silicate Hydrate Nanominerals

Musumeci

Goracci

Camacho

et al. 2021

Chemistry A European J

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Calcium silicate hydrates are members of a large family of minerals with layered structures containing pendant CaOH and SiOH groups that interact with confined water molecules. To rationalize the impact of the local chemical environment on the dynamics of water, SiOH‐ and CaOH‐rich model nanocrystals were synthesized by using the continuous supercritical hydrothermal method and then systematically studied by a combination of spectroscopic techniques. In our comprehensive analysis, the ultrafast relaxation dynamics of hanging hydroxy groups can be univocally assigned to CaOH or SiOH environments, and the local chemical environment largely affects the H‐bond network of the solvation water. Interestingly, the ordered “ice‐like” solvation water found in the SiOH‐rich environments is converted to a disordered “liquid‐like” distribution in the CaOH‐rich environment. This refined picture of the dynamics of confined water and hydroxy groups in calcium silicate hydrates can also be applied to other water‐containing materials, with a significant impact in many fields of materials science.

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Peculiarities of xonotlite synthesis from the raw materials with different SiO2 activities

Smalakys

Šiaučiūnas

2020

J Therm Anal Calorim

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Supercritical hydrothermal flow synthesis of xonotlite nanofibers

Cited by 11 publications

References 34 publications

Continuous Synthesis of Nanominerals in Supercritical Water

Continuous Synthesis of Nanominerals in Supercritical Water

Correlation between the Dynamics of Nanoconfined Water and the Local Chemical Environment in Calcium Silicate Hydrate Nanominerals

Peculiarities of xonotlite synthesis from the raw materials with different SiO2 activities

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