Cost effective one-pot synthesis approach for the formation of pure Cr2O3 nanocrystalline materials

• Published in: Results in Chemistry Vol. 4; p. 100594
• Main Authors: Ashika, S.A., Balamurugan, S., Sana Fathima, T.K.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.01.2022; Elsevier
• Subjects: Combustion synthesis; Cr2O3; Fuel efficiency; Hexamine fuel; Properties; Combustion synthesis; Cr2O3; Fuel efficiency; Properties; Hexamine fuel
• ISSN: 2211-7156; 2211-7156
• DOI: 10.1016/j.rechem.2022.100594

•The cost-effective, less time consumption synthesis of pure Cr2O3 nanomaterials was successfully carried out in a systematic way for the first time using hexamine as a fuel.•Varied the equivalence ratio, ɸe of the fuel as ɸe = 0, 1, 2, 3, 4, and 5 for comparative studies.•The highlight of our present work is that we could obtain the pure phase Cr2O3 nanomaterials only by heating the dissolved precursor, Cr(NO3)3·9H2O in deionized water without the use of fuel.•Pure nanocrystalline Cr2O3 trigonal [R-3c h (167)] phase materials were formed for as ɸe = 0, 1, 2, 3, 4, and 5.•Aggregates of fine particles of the Cr2O3 phase were seen in the FESEM images. A simple onepot synthesis method is used for the preparation of pure Cr2O3 nanomaterials by varying the fuel efficiency of hexamine as ɸe = 0, 1, 2, 3, 4, and 5. Powder XRD, TG / DTA, Raman, and FESEM-EDX are the characterization techniques used to examine the structural, microstructural, thermal, optical, and morphological features of obtained Cr2O3 nanomaterials. The XRD pattern confirms the as-prepared Cr2O3 nanomaterials are pure and it reveals the trigonal structure with the space group, R-3c h (167). The D values for the different Cr2O3 nanomaterials are in the range of 15.8–21.6 nm. The TGA shows the maximum weight loss of 15 % for the Cr2O3 nanomaterials obtained with ɸe = 0 and the minimum weight loss of 1.5 % with ɸe = 2. The fine agglomerated particles are seen for the combustion product (ɸe = 2) of Cr2O3 nanomaterials by FESEM images.