Polymer surfactant (Triton-100) assisted low cost method for preparing silver and graphene oxide modified Bi-MnOx nanocomposite for enhanced sensor and anti-microbial health care applications


Silver nanoparticles decorated on nanotubes morphology of Bismuth doped manganese oxide (Bi-MnOx) was prepared by Triton-X-100 polymer assisted precipitation process. In the second step, Ag nanoparticle with very fine particle size and graphene nanoparticle deposition by high power ultra-sonication method. Biogenic route synthesized silver nanoparticles have forms the spherical particle morphology with particle size obtained <10 nm. Polymer assisted method prepared pristine Bi-MnOx has existing in Nano- tubular morphology. The nanotube formation/nano particle incorporation has clearly confirmed by Scanning and Transmision electron microgph images. The synthesized silver nanoparticle modified Bi-MnOx composite was further tested for non-enzymatic detection of hydrogen peroxide sensor application. To exploit the biological activity of as prepared Bi-MnOx and biogenic route prepared silver quantum dot (QDs) particle and graphene oxide (GO) modified Bi-MnOx nanocomposite was further studied for gram positive and gram-negative bacterial strain. The nanoparticle dispersed Bi-MnOx could be adopted as low cost coating materials in health care smart building construction. Diffuse reflectance spectral studies are described for as prepared Ag QDs/GO doped Bi-MnOx is shown reduced band gap values (2.93 eV) than the pristine Bi-MnOx (3.17 eV) and it could be adopted for visible light photo-catalysis and antimicrobial applications.


  • Silver nanoparticles with quantum dot particles are produced by the biogenic route.

  • Ag QDs incorporated on Bi- MnOx nanotubes show effective porous texture.

  • Ag QD and GO are inserted into the tubular morphology of Bi-MnOx.

  • Ag@Bi-MnOx and Bi-MnOx show effective antibacterial activity.

  • Ag@Bi-MnOx and Ag-Bi-MnOx/GO show promising sensor activity.

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We extend their appreciation to the Deputyship for Research & Innovation, “Ministry of Education” in Saudi Arabia for funding this research work through the project no. (IFKSURG-1440-014).

Authors Contribution

RJR: Supervision, Methodology; PA: Data curation, Formal analysis. HAA: Formal analysis, editing. TR: editing, Data curation, Formal analysis. AJN: Methodology, Conceptualization,. TP: analysis, writing, editing; MD W: Data collection, Methodology.

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Correspondence to Jothi Ramalingam Rajabathar.

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Rajabathar, J.R., Arunachalam, P., AL-Lohedan, H.A. et al. Polymer surfactant (Triton-100) assisted low cost method for preparing silver and graphene oxide modified Bi-MnOx nanocomposite for enhanced sensor and anti-microbial health care applications. J Sol-Gel Sci Technol (2021). https://doi.org/10.1007/s10971-021-05468-3

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  • Bismuth oxide
  • Manganese oxide
  • Nanotube
  • Silver nanoparticles
  • H2O2
  • TritonX-100