Hollow and oval-configured ultrafine Co₃O₄ as a highly-efficient activator of monopersulfate for catalytic elimination of Azorubin S

Ta Cong KHIEM, Duong Dinh TUAN, Eilhann KWON, Bui Xuan THANH, Yiu Fai TSANG, Venkata Subbaiah MUNAGAPATI, Jet-Chau WEN, Chechia HU, Kun-Yi Andrew LIN

Research output: Contribution to journalArticlespeer-review

4 Citations (Scopus)

Abstract

Azorubin S (ARS) represents one of the most common and frequently-utilized toxic azo dyes produced from industrial activities. While various conventional treatment techniques could not effectively eliminate ARS from water, heterogeneous metal-based catalyst coupled with monopersulfate (MPS) is a highly-efficient process for eliminating ARS, in which tricobalt tetroxide (Co3O4) has been attracted increasing attention as a preeminent MPS activator due to its outstanding physicochemical properties. However, the nanoscale Co3O4 particles usually pose a limitation of serious agglomeration in the aqueous environment, thus lowering their efficiency. Thus, developing an easy-synthesized and exceptionally efficient Co3O4-based catalyst is crucially paramount. Therefore, in this work, a special hollow-structured oval-like cobalt oxide (abbreviated as HOCO) was successfully constructed using Co-metal organic framework as a precursor, which was then utilized for catalyzing activation of MPS to degrade ARS. This as-obtained HOCO exhibited distinct physicochemical characteristics from commercially-available Co3O4, which subsequently resulted in superior activities for MPS activation in ARS degradation. Specifically, 100% of ARS could be degraded in 30 min with a corresponding reaction kinetic of 0.22 min− 1 by HOCO + MPS system. SO4•– radicals were validated to be primary reactive species for ARS degradation while the degradation pathway of ARS was also elucidated. This study further provides insightful information about the development of novel hollow-structured Co3O4-based catalyst for catalyzing activation of MPS to remove toxic dyes from water. Copyright © 2022 The Author(s).

Original languageEnglish
Article number48
JournalSustainable Environment Research
Volume32
DOIs
Publication statusPublished - Dec 2022

Citation

Khiem, T. C., Tuan, D. D., Kwon, E., Thanh, B. X., Tsang, Y. F., Munagapati, V. S., . . . Lin, K.-Y. A. (2022). Hollow and oval-configured ultrafine Co₃O₄ as a highly-efficient activator of monopersulfate for catalytic elimination of Azorubin S. Sustainable Environment Research, 32. Retrieved from https://doi.org/10.1186/s42834-022-00158-3

Keywords

  • Azorubin S
  • Monopersulfate
  • Hollow
  • Cobalt oxide
  • Activation

Fingerprint

Dive into the research topics of 'Hollow and oval-configured ultrafine Co₃O₄ as a highly-efficient activator of monopersulfate for catalytic elimination of Azorubin S'. Together they form a unique fingerprint.