Výsledky vyhledávání - "Rachid Segni"

Hydrocalumite-type materials: 1. Interest in hazardous waste immobilization

Autor: Christine Taviot-Guého, Laetitia Vieille, Rachid Segni, Fabrice Leroux

Publikováno v: Journal of Physics and Chemistry of Solids. 67:1037-1042

This study investigated the incorporation of Cr, V and Si oxoanions into hydrocalumite. Hydrocalumite together with ettringite form during the hydration of Portland cement and the use of these materials in hazardous waste immobilization is of current

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9032151541875581d6031ef03055f18d
https://doi.org/10.1016/j.jpcs.2006.01.081

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Hydrocalumite-type materials: 2. Local order into Ca2Fe(OH)6(CrO42−)0.5·nH2O in temperature studied by X-ray absorption and Mössbauer spectroscopies

Autor: Laetitia Vieille, Christine Taviot-Guého, Fabrice Leroux, Rachid Segni, Nabil Allali

Publikováno v: Journal of Physics and Chemistry of Solids. 67:1043-1047

Local order around the cations Fe 3+ into Ca 2 Fe(OH) 6 (CrO 4 2− ) 0.5 · n H 2 O is studied by XAS and Mossbauer spectroscopies. The hydrocalumite phase Ca 2 Fe(OH) 6 (CrO 4 2− ) 0.5 · n H 2 O presents a Mossbauer spectrum which is refined wit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::79824c7720a3d43694a984bb74e17c23
https://doi.org/10.1016/j.jpcs.2006.01.023

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Trivalent Cation Substitution Effect into Layered Double Hydroxides Co2Fey Al1−y(OH)6Cl·nH2O: Study of the Local Order

Autor: Rachid Segni, Christophe Payen, Mourad Intissar, Fabrice Leroux, Jean-Pierre Besse

Publikováno v: Journal of Solid State Chemistry. 167:508-516

A series of layered double hydroxide materials of composition Co2FeyAl1−y(OH)6Cl·nH2O (0≤y≤1) was prepared via chimie douce. The crystalline parameter related to the cation to cation distance obeys the expected variation, showing that the subs

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eb57fd29d43cfd89831316b7b2045e0f
https://doi.org/10.1006/jssc.2002.9669

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Reactive sputtering DC magnetron-deposited TiO2 thin films intended for photoelectrolysis of water for hydrogen production

Autor: Rachid Segni, Smain Boukrouh, Djahida Kerdoud, Farida Medjani, Tahar Kezai

Publikováno v: 2012 International Conference on Renewable Energies for Developing Countries (REDEC).

Because of its photoelectrochemical properties, titanium dioxide is an attractive material in photoelectrolysis of water for hydrogen production. Magnetron sputtering is a common and practicable technique that has been used to deposit TiO 2 thin film

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ff4fcc661be0f7556afc654d0fdecac4
https://doi.org/10.1109/redec.2012.6416705

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A Raman study of the sulfated cement hydrates: ettringite and monosulfoaluminate

Autor: Jean-Marie Nedelec, Dorota Mentel, Rachid Segni, Guillaume Renaudin, Christine Taviot-Guého, Fabrice Leroux

Publikováno v: Journal of Advanced Concrete Technology
Journal of Advanced Concrete Technology, Japan Concrete Institute, 2007, 5 (3), pp.299-312. ⟨10.3151/jact.5.299⟩
Journal of Advanced Concrete Technology, 2007, 5 (3), pp.299-312. ⟨10.3151/jact.5.299⟩

International audience; Ettringite (the AFt Ca6Al2(OH)12·(SO4)3·26H2O compound) and monosulfoaluminate (the AFm Ca4Al2(OH)12·SO4·6H2O compound) phases were synthesised by the coprecipitation method and studied by micro-Raman spectroscopy. Hydroge

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8f3299c29ba559a811450028382d8f0f
https://hal.archives-ouvertes.fr/hal-00187345/file/36_JAdvConcTech07_5_299.pdf

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