10.1007/s40089-015-0178-z

Spectral characterization of mechanically synthesized MoO3-CuO nanocomposite

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  • Dola Sundeep*1,
  • A. Gopala Krishna1,
  • R. V. S. S. N. Ravikumar2,
  • T. Vijaya Kumar3,
  • S. Daniel Ephraim4,
  • Y. L. Pavan3,
  1. School of Nanotechnology, Institute of Science and Technology (IST), Jawaharlal Nehru Technological University (JNTUK), Kakinada, Andhra Pradesh, 533003, IN
  2. Department of Physics, Acharya Nagarjuna University, Guntur, Andhra Pradesh, 522510, IN
  3. Department of Mechanical Engineering, K L University, Guntur, Andhra Pradesh, 522502, IN
  4. Department of Mechanical Engineering, Jawaharlal Nehru Technological University, Kakinada, Andhra Pradesh, 533003, IN
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Published in Issue 2016-01-26

How to Cite

Sundeep, D., Gopala Krishna, A., Ravikumar, R. V. S. S. N., Vijaya Kumar, T., Daniel Ephraim, S., & Pavan, Y. L. (2016). Spectral characterization of mechanically synthesized MoO3-CuO nanocomposite. International Nano Letters, 6(2 (June 2016). https://doi.org/10.1007/s40089-015-0178-z
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Abstract

Abstract In this work, MoO 3 -CuO metal oxide composite nanopowders are prepared by simple mechanochemical assisted synthesis technique with the stoichiometric weight ratios of MoO 3 and CuO as 2.3:1 and 3.3:1, respectively. The structural and spectroscopic properties of the as-synthesised samples are characterised by XRD, SEM with EDS, FT-IR, Raman spectroscopy and TGA/DTA. X-ray diffraction pattern demonstrates the peaks correspond to orthorhombic phase of α-MoO 3 and monoclinic phase of β-CuO. The average crystalline sizes of the 2.3:1 and 3.3:1 samples were found to be 16 and 24 nm, respectively, which are supported by Williamson–Hall (W–H) calculations. The correlations between the milling rotational speeds with morphological characteristics are revealed by the SEM images. The fundamental modes of Mo=O and Cu–O were analysed by FT-IR. Raman analysis has provided the qualitative information about the structure of the mixed oxide composite. Thermogravimetry analysis and Differential Thermal Analysis (DTA) of MoO 3 -CuO have revealed that the dual phase mixed oxide composite is stable up to 709 °C with a negligible weight loss. Based on the above, it can be inferred that the synthesised mixed lubricous oxide nanocomposite could be used as a solid lubricant at elevated temperatures.

Keywords

  • Mixed oxide nanocomposites,
  • Mechanochemical synthesis,
  • Williamson–Hall plot,
  • TGA and DTA
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