Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7887658 | Ceramics International | 2018 | 13 Pages |
Abstract
A new and "flexible" microwave-assisted hydrothermal (MWH) synthesis of crednerite CuMnO2 materials is proposed. Single-phase compounds are synthesized by means of the MWH method in a significantly shorter time than by conventional hydrothermal heating. CuMnO2 single-phase compounds are obtained in the 80-180 °C temperature range, with times ranging from 5 min to 1 h, starting from nitrate reactants. The structure and the phase composition were studied by X-Ray diffraction and FT-IR spectroscopy, and reveal that all samples crystallize within the crednerite structure with the C2/m space group and without other impurities. The surface area is 59.5 m2/g for the sample obtained at 120 °C, 5 min, and 76.8 m2/g for the sample obtained at 80 °C, 5 min, respectively. The morphological analysis by transmission electron microscopy revealed plate-like nanoparticles, 20-50 nm in diameter. As application, in the case of the as-obtained products the catalytic activity was tested for hydrogen evolution in aqueous sulphide solution.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
M. Poienar, R. Banica, P. Sfirloaga, C. Ianasi, C.V. Mihali, P. Vlazan,