Tailoring photocatalysts and elucidating mechanisms of photocatalytic degradation of perfluorocarboxylic acids (PFCAs) in water: a comparative overview

Huu Tuan Do, Lan Anh Phan Thi, Ngoc Han Dao Nguyen, Chao Wei Huang, Quyet Van Le, Van Huy Nguyen

Research output: Contribution to journalReview articlepeer-review

24 Citations (Scopus)

Abstract

A perfluorooctanoic acid (PFOA), as the most important representative of perfluorocarboxylic acids (PFCAs), is environmentally persistent and bioaccumulative. Among treatment techniques for PFOA decomposition, photocatalytic degradation of PFOA has received considerable attention. A series of candidate photocatalytic materials, including TiO2-, carbonaceous-, Ga2O3-, In2O3-based, etc., have been successfully proposed to eliminate PFOA. Overall, there are two types of mechanisms for photocatalytic degradation of PFCAs, including conventional mechanism and charge transfer mechanism. For a conventional mechanism, the mechanism of PFOA photodegradation over bulk TiO2 via two pathways: photo-redox and β-scission. For the charge transfer mechanism, the PFOA degradation pathway in water-soluble H3PW12O40 is mainly via charge-transfer excited complex ([PW12O40]3−*). Finally, attention on critical challenges and prospects for photodegradation of PFOA are also intensified.

Original languageEnglish
Pages (from-to)2569-2578
Number of pages10
JournalJournal of Chemical Technology and Biotechnology
Volume95
Issue number10
DOIs
Publication statusPublished - 2020 Oct 1
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Waste Management and Disposal
  • Pollution
  • Organic Chemistry
  • Inorganic Chemistry

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