A dual TiO 2 /Ti-stainless steel anode for the degradation of orange G in a coupling photoelectrochemical and photo-electro-Fenton system

Ching Fang Liu, C. P. Huang, Chi Chang Hu, Ch-Hpin Huang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

A dual-anode consists of stainless steel and TiO 2 /Ti electrodes is used to study the kinetics of the degradation of hazardous chemicals exemplified by azo dye orange G (OG) using a coupling photoelectrochemical catalytic and photoelectro-Fenton (PEC/PEF) system. Concurrent generation of hydroxyl radicals on the TiO 2 /Ti photocatalyst and in-situ generation of Fenton reagents on the stainless steel electrode greatly enhances the performance of the PEC/PEF electrodes over that of the PEC and the PEF alone process. The efficiency of the PEC/PEF process is a function of Fe 2+ and H 2 O 2 concentration OH⋅ in the solution bulk, which promotes the oxidative degradation of OG and its byproducts. The mean carbon oxidation state (COS) is estimated to reflect the degree of mineralization. Based on the pseudo first-order kinetics with respect to OH[rad], OG, Fe 2+ , the corresponding reaction rates is established. UV–Vis spectrometry reveals the presence of four major intermediates, which helps establish the OG degradation pathways.

Original languageEnglish
Pages (from-to)221-229
Number of pages9
JournalScience of the Total Environment
Volume659
DOIs
StatePublished - 1 Apr 2019

Keywords

  • Electro-Fenton
  • Electrochemical oxidation
  • Orange G
  • Photoelectro-Fenton
  • Photoelectrochemical catalytic oxidation

Fingerprint Dive into the research topics of 'A dual TiO <sub>2</sub> /Ti-stainless steel anode for the degradation of orange G in a coupling photoelectrochemical and photo-electro-Fenton system'. Together they form a unique fingerprint.

Cite this