Potential of Piper betle@Co₃O₄ nanoparticles as high-performance photocatalysts for the removal of industrial dyes

Sanjeev KUMAR, Gagandeep KAUR, Mohit RAWAT, Yiu Fai TSANG, Kun-Yi LIN, Ki-Hyun KIM

Research output: Contribution to journalArticlespeer-review

Abstract

In this study, cobalt oxide (Co₃O₄) NPs were bio-synthesized for photocatalytic application through the reduction of cobalt chloride hexahydrate using extract of Piper betle (e.g., polyphenols). The as-prepared Co₃O₄ NPs exhibited the face-centered cubic structure of Co₃O₄ with the crystallite sizes ranging from 20 to 30 nm with an energy band gap of 3.86 eV. FTIR spectra revealed that Piper betle extracts were present on the surface of the resulting Co₃O₄. HRTEM confirmed the dispersion of non-agglomerated uniformly spherical particles over a large area. The photocatalytic activity of the Co₃O₄ NPs was investigated for the degradation of the industrial dye, Eriochrome Black T (EBT). The degradation efficiency of EBT could exceed 94% within 80 min under UV light. The Piper betle@Co₃O₄ NPs recorded superior performance (quantum yield of 1.98 × 10⁻⁴ Φ and figure-of-merit of 1.59 × 10⁻⁹ mol L J⁻¹ g⁻¹ h⁻¹) with a low energy requirement of 2.35 × 10⁹ J mol⁻¹. As such, the Piper betle@Co₃O₄ NPs are recognized as a high-efficiency photocatalyst for efficient degradation of industrial dyes. Copyright © 2022 Elsevier Ltd. All rights reserved.

Original languageEnglish
Article number132242
JournalJournal of Cleaner Production
Volume361
Early online dateMay 2022
DOIs
Publication statusPublished - Aug 2022

Citation

Kumar, S., Kaur, G., Rawat, M., Tsang, Y. F., Lin, K.-Y., & Kim, K.-H. (2022). Potential of Piper betle@Co₃O₄ nanoparticles as high-performance photocatalysts for the removal of industrial dyes. Journal of Cleaner Production, 361. Retrieved from https://doi.org/10.1016/j.jclepro.2022.132242

Keywords

  • Cobalt oxide
  • Piper betle
  • Photocatalysis
  • Eriochrome black T dye

Fingerprint

Dive into the research topics of 'Potential of Piper betle@Co₃O₄ nanoparticles as high-performance photocatalysts for the removal of industrial dyes'. Together they form a unique fingerprint.