Solid-state NMR characterization of a controlled-pore glass and of the effects of electron irradiation

Brunet, F.; Charpentier, Thibault; Caër, Sophie Le; Renault, Jean Philippe

doi:10.1016/j.ssnmr.2007.12.001

Cited by 25 publications

(37 citation statements)

References 62 publications

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“…The large resonance can be calculated with major contributions at about 3.5, 4.2, and 6.5 ppm. A similar peak at 3.5 ppm was observed in hydrated silica and assigned to physisorbed water. This contribution is very important for basic and acidic treatments.…”

Section: Resultssupporting

confidence: 66%

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Influence of Alteration Solutions on the Chemical Durability of the Zerodur^® Glass‐Ceramic: Structural Investigation

Doret

Pellerin

Allix

et al. 2014

Int J Applied Ceramic Tech

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The Zerodur® glass‐ceramic chemical durability has been studied by leaching. The nuclear magnetic resonance spectroscopy analysis has allowed highlighting the network changes. A macroscopic evaluation of the surface alteration has been performed by contact angle measurements, this analysis being sensible to the roughness and the hydrophilic character. In basic solutions, depolymerization phenomena concern all former cations, as result of hydrolysis phenomena. A preferential attack of the interface matrix‐nanocrystals, implicating phosphorus involves some nanocrystals removing. The Zerodur® glass‐ceramic keeps an excellent chemical durability during exposition to acidic aqueous solutions. But in basic medium, the biphasic nature involves a strong alteration.

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Section: Resultssupporting

confidence: 66%

“…The first group comprises several narrow peaks between 0 and 2 ppm. They can be attributed to nonhydrogen‐bonded silanols groups, also called free hydroxyl groups . The second part of the signal is a large resonance in the range 3.5–7 ppm except for basic‐treated powder, which presents fine lines in this region.…”

Section: Resultsmentioning

confidence: 99%

Influence of Alteration Solutions on the Chemical Durability of the Zerodur^® Glass‐Ceramic: Structural Investigation

Doret

Pellerin

Allix

et al. 2014

Int J Applied Ceramic Tech

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show abstract

“…Nevertheless, the hydroxylation of the silica surface has an effect on the nature of the mechanism and a strongly dehydrated surface can tune the excitonic chemistry to a more ionic one as shown by the reactivity of the electron at the surface (dissociative electron attachment to -OH groups (11)) [82]. The reaction shown in Equation 11 accounts for the previous observation of ionic reactions on high temperature activated silica surfaces [83].…”

Section: Ste Excitonmentioning

confidence: 84%

Water Radiolysis: Influence of Oxide Surfaces on H2 Production under Ionizing Radiation

Caër

2011

Water

488

309

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Abstract:The radiolysis of water due to ionizing radiation results in the production of electrons, H  atoms,  OH radicals, H 3 O + ions and molecules (dihydrogen H 2 and hydrogen peroxide H 2 O 2 ). A brief history of the development of the understanding of water radiolysis is presented, with a focus on the H 2 production. This H 2 production is strongly modified at oxide surfaces. Different parameters accounting for this behavior are presented.

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“…Glass irradiation, which occurs when radioactive nuclear waste is stored in porous glasses, is known to decrease the surface density of silanol (OH) groups at their surface [23]. As a result, investigating the role of surface chemistry is crucial to predict and prevent potential leakage issues.…”

Section: Introductionmentioning

confidence: 99%

Water self-diffusion at the surface of silica glasses: effect of hydrophilic to hydrophobic transition

Siboulet¹,

Molina²,

Coasne³

et al. 2013

Molecular Physics

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We study water dynamics at a silica aqueous interface. Both hydrophilic (hydroxylated) surfaces and hydrophobic surfaces (dehydroxylated upon irradiation) have been generated from atomistic simulations. A new method for the calculation of the normal self-diffusion coefficients based on the calculation of mean first passage times is proposed. It uses the Smoluchowski theory of Brownian motion and it takes proper account of the layering of the molecules. In the case of parallel self-diffusion coefficients, a decrease is found compared to the bulk values. It can be described in terms of hydrodynamic boundary conditions induced by the surface confinement. This hydrodynamic explanation is not enough to interpret the case of normal self-diffusion coefficients for which an important diminution is found. Normal self-diffusion coefficients appear to depend strongly on the hydrophilicity of the surface. They tend towards their bulk value only at long distances from the surfaces. The first layer of water molecules is found to be partially adsorbed.

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Solid-state NMR characterization of a controlled-pore glass and of the effects of electron irradiation

Cited by 25 publications

References 62 publications

Influence of Alteration Solutions on the Chemical Durability of the Zerodur^® Glass‐Ceramic: Structural Investigation

Influence of Alteration Solutions on the Chemical Durability of the Zerodur^® Glass‐Ceramic: Structural Investigation

Water Radiolysis: Influence of Oxide Surfaces on H2 Production under Ionizing Radiation

Water self-diffusion at the surface of silica glasses: effect of hydrophilic to hydrophobic transition

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Solid-state NMR characterization of a controlled-pore glass and of the effects of electron irradiation

Cited by 25 publications

References 62 publications

Influence of Alteration Solutions on the Chemical Durability of the Zerodur® Glass‐Ceramic: Structural Investigation

Influence of Alteration Solutions on the Chemical Durability of the Zerodur® Glass‐Ceramic: Structural Investigation

Water Radiolysis: Influence of Oxide Surfaces on H2 Production under Ionizing Radiation

Water self-diffusion at the surface of silica glasses: effect of hydrophilic to hydrophobic transition

Contact Info

Product

Resources

About

Influence of Alteration Solutions on the Chemical Durability of the Zerodur^® Glass‐Ceramic: Structural Investigation

Influence of Alteration Solutions on the Chemical Durability of the Zerodur^® Glass‐Ceramic: Structural Investigation