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Journal of Materials Science

, Volume 54, Issue 7, pp 5726–5742 | Cite as

Facile synthesis of exfoliated graphitic carbon nitride for photocatalytic degradation of ciprofloxacin under solar irradiation

  • Sambhu Prasad Pattnaik
  • Arjun Behera
  • Satyabadi Martha
  • Rashmi Acharya
  • Kulamani Parida
Materials for life sciences
  • 36 Downloads

Abstract

Exfoliated g-C3N4 nanoparticles prepared by a green route (an aqueous bi-thermal method) were characterized by techniques such as XRD, UV-VDRS, FESEM, PL, TEM. Degradation of an aqueous solution of ciprofloxacin (CPN), when exposed to solar irradiation in the presence of g-C3N4 nanoparticles, was studied to evaluate the photocatalytic activities of semiconductor photocatalyst. The photocatalytic activities of g-C3N4 have enhanced after its exfoliation. The exfoliated g-C3N4 obtained with the aqueous bi-thermal method provided about three times the large surface area and about two and half times effective photocatalyst as bulk g-C3N4. The results of electrochemical tests like linear sweep voltammetry, MS graphs of exfoliated g-C3N4 nanoparticles together with electrochemical impendence (EIS) corroborated the results of photocatalytic activities of g-C3N4 after exfoliation. The enhanced photocatalytic behavior of exfoliated g-C3N4 is the result of its efficient separation, low recombination of photogenerated charge carriers and high surface area. The effects of exfoliated g-C3N4 catalyst concentration, irradiation time and initial CPN concentration on the degradation of CPN were carefully studied. We found that 1 g/L nano-exfoliated g-C3N4 can degrade up to 78% a 20 ppm CPN solution exposed to solar light for 1 h. The studies also incorporated scavenger tests to possibly identify reactive species and mechanism for CPN degradation. This work provided a new method for scalable exfoliation of g-C3N4.

Notes

Acknowledgements

SPP acknowledges Siksha ‘O’ Anusandhan, Bhubaneswar, for XRD facilities and other infrastructure and help in patenting the exfoliation method.

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

Authors and Affiliations

  1. 1.Centre for Nano Science and Nano Technology, ITERSiksha ‘O’ Anusandhan UniversityBhubaneswarIndia

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