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8. Influence of chelating agent on the morphological properties of α-CuMoO4 powder synthesized by sol–gel method

Author

Benchikhi, M., Rachida El Ouatib, Guillemet-Fritsch, S., Er-Rakho, L., Durand, B., Kassmi, K., Laboratoire de Physico-Chimie des Matériaux Inorganiques, Faculté des Sciences Aïn Chock [Casablanca] (FSAC), Université Hassan II [Casablanca] (UH2MC)-Université Hassan II [Casablanca] (UH2MC), Centre interuniversitaire de recherche et d'ingenierie des matériaux (CIRIMAT), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC), Université Mohammed Premier [Oujda], Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - INPT (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Université Ibn Tofail (MOROCCO), Université Mohammed Premier Oujda (MOROCCO), and Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)

Subjects
Morphology, Copper molybdate, Sol-gel, Matériaux, Grain size, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract

International audience; In this work, we have synthesized precursor gels of copper molybdate with various chelating agents (glycine, polyacrylic acid, citric acid). After heating at adequate temperatures, the obtained precursors led to the pure phase α-CuMoO4, whose morphology and grain size depend on the chemical nature of the chelating agent used.

Published
2015

10. Preparation of Cement Clinker from Geopolymer-Based Wastes.

Author

Hattaf R, Benchikhi M, Azzouzi A, El Ouatib R, Gomina M, Samdi A, and Moussa R

Abstract

In order to avoid potential environmental pollution from geopolymer-based material wastes, this work investigated the feasibility of using these materials as alternative raw materials in the preparation of cement clinker. The geopolymer binders and mortars were used as substitutes for natural mineral clays since they are rich in silica and alumina. Simulated geopolymer wastes were prepared by the activation of metakaolin or fly ash by an alkaline silicate solution. The cement-clinkers fired at 1450 °C for 1h were characterized by XRD, XRF, SEM-EDS, and a free lime (CaO f ) content test. The anhydrous clinker mineral phases C 3 S (Ca 3 SiO 5 ), C 2 S (Ca 2 SiO 4 ), C 3 A (Ca 3 Al 2 O 6 ), and C 4 AF (Ca 4 Al 2 Fe 2 O 10 ) were well-crystallized in all investigated formulations. The free lime was lower than 1.3 wt% in all elaborated clinkers, which indicates a high degree of clinkerization. The results demonstrate that geopolymer binder and mortar materials are suitable substitutes for natural mineral clay incement clinker preparation.

Published
2021
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