rGO Blended PbS Nanoparticles for the Effective Degradation of Methylene Blue Dye and Growth Inhibition against <I>B. subtilis</I> Bacteria

Authors

  • C. Rajashree Department of Physics, AVVM Sri Pushpam College (Affiliated to Bharathidasan University, Tiruchirappalli), Poondi, Tamilnadu, India
  • A. R. Balu Department of Physics, AVVM Sri Pushpam College (Affiliated to Bharathidasan University, Tiruchirappalli), Poondi, Tamilnadu, India
  • M. Sriramraj Department of Physics, AVVM Sri Pushpam College (Affiliated to Bharathidasan University, Tiruchirappalli), Poondi, Tamilnadu, India
  • K. Devendran Department of Physics, AVVM Sri Pushpam College (Affiliated to Bharathidasan University, Tiruchirappalli), Poondi, Tamilnadu, India
  • A. Vinith Department of Physics, AVVM Sri Pushpam College (Affiliated to Bharathidasan University, Tiruchirappalli), Poondi, Tamilnadu, India
  • N. Arunkumar Department of Physics, AVVM Sri Pushpam College (Affiliated to Bharathidasan University, Tiruchirappalli), Poondi, Tamilnadu, India; Department of Physics, Anjalai Ammal-Mahalingam Engineering College (Affiliated to Anna University, Chennai), Kovilvenni, Tamilnadu, India
  • V. Rajamani Department of Physics, AVVM Sri Pushpam College (Affiliated to Bharathidasan University, Tiruchirappalli), Poondi, Tamilnadu, India

DOI:

https://doi.org/10.3329/jsr.v17i1.72669

Abstract

A simple one-pot synthesis method was used to synthesize reduced graphene oxide (rGO) blended PbS nanocomposite (NC) from Centella asiatica leaf extract. Its photocatalytic and antibacterial properties were studied and compared with that of PbS nanoparticles (NPs) synthesized by precipitation method. PbS with cubic structure was confirmed by XRD studies. With the incorporation of rGO, the size of PbS crystals decreased from 27 nm to 23 nm. For rGO-blended PbS, grain boundaries are well defined and agglomeration is minimised. Pb–S related bands seem to shift towards lower wavenumber side for rGO-PbS NC. PL intensity decreased for rGO-PbS NC due to suppression of recombined photoelectrons and holes. With rGO inclusion, the absorption edge shifted towards higher wavelength, decreasing the band gap. By providing larger surface area, rGO enhanced the photodegradation efficiency of PbS from 84.38 % to 95.06 % against methylene blue (MB)under visible light. Bacterial growth inhibition nature of PbS improved with rGO incorporation.

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Published

2025-01-01

How to Cite

Rajashree, C., Balu, A. R., Sriramraj, M., Devendran, K., Vinith, A., Arunkumar, N., & Rajamani, V. (2025). rGO Blended PbS Nanoparticles for the Effective Degradation of Methylene Blue Dye and Growth Inhibition against <I>B. subtilis</I> Bacteria. Journal of Scientific Research, 17(1), 57–70. https://doi.org/10.3329/jsr.v17i1.72669

Issue

Vol. 17 No. 1 (2025)

Section

Section A: Physical and Mathematical Sciences

License

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© Journal of Scientific Research

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