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Characterization and photoluminescence properties of ultrafine copper molybdate (α-CuMoO4) powders prepared via a combustion-like process

Benchikhi, Mohamed and El Ouatib, Rachida and Guillemet, Sophie and Er-Rakho, Lahcen and Durand, Bernard Characterization and photoluminescence properties of ultrafine copper molybdate (α-CuMoO4) powders prepared via a combustion-like process. (2016) International Journal of Minerals, Metallurgy, and Materials, 23 (11). 1340-1345. ISSN 1674-4799

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Official URL: https://doi.org/10.1007/s12613-016-1356-3

Abstract

We report a simple method for preparing copper(II) molybdate (CuMoO4) powders via a combustion-like process. A gel was first prepared by the polymerizable complex method, where citric acid was used as a complexing and polymerizing agent and nitric acid was used as an oxidizing agent. The thermal decomposition behavior of the (CuMo)-precursor gel was studied by thermogravimetry–differential thermal analysis (TG–DTA), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). We observed that the crystallization of CuMoO4 powder was completed at 450°C. The obtained homogeneous powder was composed of grains with sizes in the range from 150 to 500 nm and exhibited a specific surface area of approximately 5 m2/g. The average grain size increased with increasing annealing temperature. The as-prepared CuMoO4 crystals showed a strong green photoluminescence emission at room temperature under excitation at 290 nm, which we mainly interpreted on the basis of the Jahn-Teller effect on [MoO 4 2− ] complex anions. We also observed that the photoluminescence intensity increased with increasing crystallite size.

Item Type:Article
HAL Id:hal-02434423
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Université Hassan II Casablanca - UH2C (MOROCCO)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
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Funders:
Volubilis Partenariat Hubert Curien - Projet de Recherches Convention Internationale du CNRS
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Deposited By: Yves MOMBOISSE
Deposited On:10 Jan 2020 08:50

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