Impacts of pH on photocatalytic efficiency, the control of energy and morphological properties of CuO nanoparticles for industrial wastewater treatment applications Articles uri icon

authors

  • Sarathi, R.
  • Meenakshi Sundar, S.
  • Jayamurugan, P.
  • Ganganagunta, Srinivas
  • Sudhadevi, D.
  • Ubaidullah, Mohd
  • PANDIT, BIDHAN
  • Gupta, Manish
  • Sehgal, Satbir S.
  • Seshagiri Rao, N. V.S.S.

publication date

  • December 2023

volume

  • 298

abstract

  • Copper oxide nanoparticles were synthesised using a microwave oven method at different pH conditions (2, 5, 9, 12) in this study. FTIR, PL, FE-SEM, EDAX, XRD, TEM, XPS, and photocatalytic activity were used to investigate the prepared materials. The standard monoclinic structure of the CuO nanoparticle is seen by XRD. The FE-SEM image depicts an agglomerated spherical granular shape. A PL spectrum of copper oxide nanoparticles reveals three peaks at 362 nm, 528 nm, and 596 nm. The existence of CuO nanoparticles in the molecular structure was confirmed by FTIR. HRTEM images indicate spherical morphology at 100 nm, 50 nm, and 20 nm. The SAED diagram's diffraction rings matched nicely with the XRD diagram's peaks. The EDAX spectra confirm the presence of copper and oxygen in abundance in these nanoparticles. During a malachite green dye treatment, the highest pH concentration was 98.33 % higher photocatalytic activity than the other samples. According to the XPS study, the two satellite peaks at 939 eV to 946 eV and 959 eV to 965 eV show the formation of CuO with the oxidation state Cu (+2). As part of the application to meet the needs of the company, the samples were tested for the photocatalytic decomposition of malachite green industrial dye under the irradiation of a visible light source, and the samples demonstrated an excellent result in the waste water decomposition of industrial dye in a very short period of time.the band gap energy values were found to be 1.71, 1.70, 1.69 and 1.68 eV.

subjects

  • Materials science and engineering

keywords

  • industrial wastewater treatment; photocatalytic properties; sem; tem; xps