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Nanotechnology

Nanoparticles Show Promise in Photocatalytic Degradation and Antibacterial Activity

Strategic Insights

— 1 min read

Scientists at Bharathidasan University in India have developed a new method for synthesizing copper oxide (CuO) nanoparticles using the sol-gel method. The researchers found that these nanoparticles exhibited excellent optical, structural, and morphological properties, making them suitable for various applications, including photocatalytic degradation of organic pollutants and antibacterial activity.

Key Takeaways:

  • The study found that the CuO nanoparticles had a high crystallinity and crystallite size of 19 nm, as determined by X-ray diffraction (XRD) patterns.
  • The nanoparticles exhibited an optical energy band gap of approximately 1.7 eV, contributing to their notable photocatalytic efficiency.
  • The photocatalytic activity of the CuO nanoparticles was tested against Methylene Blue (MB) and Congo Red (CR) dyes, with degradation rates of 79% and 81% respectively after 120 minutes.
  • The antibacterial activity of the CuO nanoparticles was assessed using the agar well diffusion method, and showed a zone of inhibition of 10 mm against B. cereus.
  • The researchers also tested the CuO nanoparticles against Tetracycline (TC), Ampicillin (AMP), Ciprofloxacin (CIP), and Azithromycin (AZM) antibiotics, with degradation efficiencies of 81.3%, 70.1%, 76.3%, and 71.1% respectively after 120 minutes.
  • The study concluded that the CuO nanoparticles were highly favorable and efficient catalysts, and exhibited remarkable recycling capabilities in the degradation of dyes.

Statistics:

  • Crystallite size of CuO nanoparticles: 19 nm
  • Optical energy band gap of CuO nanoparticles: 1.7 eV
  • Degradation rate of Methylene Blue (MB) dyes using CuO nanoparticles: 79% after 120 minutes
  • Degradation rate of Congo Red (CR) dyes using CuO nanoparticles: 81% after 120 minutes
  • Zone of inhibition against B. cereus using CuO nanoparticles: 10 mm
  • Degradation efficiency of Tetracycline (TC) using CuO nanoparticles: 81.3%
  • Degradation efficiency of Ampicillin (AMP) using CuO nanoparticles: 70.1%
  • Degradation efficiency of Ciprofloxacin (CIP) using CuO nanoparticles: 76.3%
  • Degradation efficiency of Azithromycin (AZM) using CuO nanoparticles: 71.1%

Sources:

  • NewsRx. Researchers from Bharathidasan University Discuss Findings in Nanoparticles (Photocatalytic Degradation of Organic Pollutants and Antibacterial Properties of Cuo Nanoparticles: a Study On Methylene Blue, Congo Red, Tetracycline, Ampicillin, ...). News of Science. July 20, 2025; p 3201.
  • Journal of Sol-Gel Science and Technology. Photocatalytic Degradation of Organic Pollutants and Antibacterial Properties of Cuo Nanoparticles: a Study On Methylene Blue, Congo Red, Tetracycline, Ampicillin, Ciprofloxacin, and Azithromycin. 2025.
  • Springer. Journal of Sol-Gel Science and Technology. www.springerlink.com/content/0928-0707/
  • Bharathidasan University. School of Physics, Dept. of Medical Physics, Tiruchirappalli 620024, Tamil Nadu, India.

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