Synthesis of nanocrystalline eskolaite via grimaldiite

Robić, Marko; Ristić, Mira; Krehula, Stjepko; Jurić, Marijana; Musić, Svetozar (2020) Synthesis of nanocrystalline eskolaite via grimaldiite. Chemical Papers, 75 (2). pp. 735-741. ISSN 2585-7290

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Official URL: http://doi.org/10.1007/s11696-020-01338-4

Abstract

Grimaldiite (α-CrOOH) was precipitated hydrothermally from the CrCl3 aqueous solution in the presence of hexamethylenetetramine (HMTA). The crystallite size of grimaldiite samples was estimated to be ~ 2 nm. Eskolaite (α-Cr2O3) was produced by the calcination of grimaldiite at 500 and 700 °C. FE-SEM images showed amorphous-like aggregates of grimaldiite due to very fine particles (crystallites), whereas eskolaite was in the form of sphere-like nanoparticles. Synthesized grimaldiite and eskolaite were used in the investigation of rhodamine B (RhB) degradation. The significant degradation percentage of RhB obtained by grimaldiite was explained as catalytic effect (in dark) and photocatalytic contribution (with illumination).

Item Type:

Article

Additional Information:

This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://link.springer.com/article/10.1007/s11696-020-01338-4

Uncontrolled Keywords:

Grimaldiite ; Eskolaite ; HMTA ; Nanocrystallinity ; Rhodamine B

Subjects:

NATURAL SCIENCES > Chemistry > Inorganic Chemistry
NATURAL SCIENCES > Chemistry > Applied Chemistry

Divisions:

Division of Materials Chemistry

Projects: