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Alteration of CdO Lattice Structure By Cu2+ Doping for Enhanced Photocatalytic Application

  • Condensed Matter
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Abstract

Cadmium oxide (CdO) photocatalysts in pure and doped form have been prepared using chemically controlled co-precipitation method followed by calcination at different temperatures, to study the size-dependent structural properties and its influence on photocatalytic activity. As particle size and size distribution are the critical parameters in deciding the catalytic photodegradation, these were determined and correlated using X-ray diffraction (XRD), transmission electron microscope (TEM), and selected area electron diffraction (SAED). The calculated structural parameters using the recorded XRD patterns showed calcination temperature and dopant concentration reliance to its lattice structure. The extent of crystallinity changed by Cu doping and the measured crystallite sizes of all the prepared photocatalysts lied in the range 22 to 72 nm. Smallness in size together with the corresponding large surface area paved the way for the better photocatalytic activity of these nanoparticles in the degradation of methylene blue dye. Perceived well-defined edged morphology, with small size particles, as confirmed from TEM, advocates pronounced photocatalytic activity of the prepared pure and doped CdO nanoparticles. The distinct bright spotted rings seen in the SAED pattern exposed the high crystalline quality of the prepared samples. Impregnation of dopant ion Cu2+ into CdO lattice has been detected through X-ray photoelectron spectroscopy (XPS). Replaced Cu2+ enhanced the photocatalytic activity and is evaluated by monitoring the degradation of methylene blue solution. The highest photocatalytic activity of 1 wt.% Cu-doped CdO nanoarticles calcined at 400 °C was revealed from the superior percentage of color abatement (78.69%) and good rate constant (0.59814 h−1).

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Authors and Affiliations

  1. Department of Physics & Research Centre, Scott Christian College (Autonomous), Nagercoil, 629003, India

    D. J. Jeejamol & A. Moses Ezhil Raj

  2. Manonmaniam Sundaranar University, Abishekapatti, Tirunelveli, 627012, India

    D. J. Jeejamol & A. Moses Ezhil Raj

  3. Department of Mechanical Engineering, Noorul Islam Centre for Higher Education, Kumaracoil, 629180, India

    K. S. Jai Aultrin

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Jeejamol, D.J., Raj, A.M.E. & Aultrin, K.S.J. Alteration of CdO Lattice Structure By Cu2+ Doping for Enhanced Photocatalytic Application. Braz J Phys 51, 1550–1564 (2021). https://doi.org/10.1007/s13538-021-00993-6

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