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Investigation of nonlinear optical and photocatalytic properties of sol–gel derived KBiFe2O5

  • Ranjan Rai
  • Agnes George
  • V. Sai Muthukumar
  • K. B. R. Varma
  • Reji Philip
  • Muralikrishna MolliEmail author
Article
  • 35 Downloads

Abstract

KBiFe2O5 polycrystalline powder was synthesized via citrate assisted sol–gel route. Its structural, microstructural, linear, nonlinear optical and photocatalytic properties were investigated. X-ray diffraction analysis revealed its structure to be monoclinic phase at room temperature. Nonlinear optical absorption of this material was investigated using open aperture z-scan technique. A three-photon type absorption mechanism fitted well with the experimental data, and the corresponding nonlinear absorption coefficient was calculated to be 4 × 10−23 m3/W2. The band gap of this material as determined by diffuse reflectance spectroscopy was found to be 1.75 eV. This makes it suitable for visible light driven photocatalytic applications. The photocatalytic property of KBiFe2O5 was investigated by degradation of methylene blue under visible light irradiation at different pH. The degradation rate constant was found to be 0.031 min−1 at a pH of 11.

Notes

Acknowledgements

We express our gratitude to Bhagawan Sri Sathya Sai Baba, the founder chancellor of SSSIHL, for his constant guidance and inspiration. We are grateful to our university, SSSIHL, for providing constant support and Central Research Instruments Facility. We also acknowledge the financial support from DST-FIST (Sanction No. SR/FST/PSI-172/2012).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of PhysicsSri Sathya Sai Institute of Higher LearningAnantapurIndia
  2. 2.Materials Research Centre, Indian Institute of ScienceBangaloreIndia
  3. 3.Light and Matter Physics GroupRaman Research InstituteBangaloreIndia

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