Optical properties of bimetallic (SrO-K2O) nanofillers

Olusola Olaitan Ayeleru, Sisanda Dlova, Freeman Ntuli, Williams Kehinde Kupolati, Peter Apata Olubambi

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


In this study, bimetallic nanofiller capable of usage as reinforcement was synthesized from expanded polystyrene (EPS). Bimetallic materials consist of two different metals. The bimetallic nanofiller consisting of SrO and K2O was successfully developed by the hydrothermal method which many researchers have well utilized to prepare nanoparticles in recent times. This study aims to synthesize and characterize bimetallic SrO-K2O, nanofillers from recycled expanded polystyrene (EPS). Products obtained were characterized by Zeta potential and Raman spectra. The Zeta potential was used to determine the surface charge of the nanofillers in solution. The Raman spectroscopy was used to determine the crystalline structure of the nanofillers. Based on the results, it was concluded that stability of nanoparticle materials in acidic medium decreases as the pH increases, and for the basic medium, stability reduces with decrease pH. The mixture of SrO and K2O to form SrO-K2O bimetallic oxide affects the stability of the nanofillers produced both in the acidic and basic medium. The Raman spectra indicated the Dband and Gband of the synthesized SrO, K2O and bimetallic SrO-K2O at 1006, 1008 and 1004 cm-1 and 1598, 1610 and 1606 cm-1 respectively. It was concluded that the shift in band gaps were because of structural changes in the molecules of the recycled expanded polystyrene.

Original languageEnglish
Pages (from-to)483-489
Number of pages7
JournalProcedia Manufacturing
Publication statusPublished - 2019
Event14th Global Congress on Manufacturing and Management, GCMM 2018 - Brisbane, Australia
Duration: Dec 5 2018Dec 7 2018

All Science Journal Classification (ASJC) codes

  • Industrial and Manufacturing Engineering
  • Artificial Intelligence


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