1. Enhanced photoelectrochemical degradation of Ibuprofen and generation of hydrogen via BiOI-deposited TiO 2 nanotube arrays.
- Author
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Chen H, Peng YP, Chen TY, Chen KF, Chang KL, Dang Z, Lu GN, and He H
- Subjects
- Electrodes, Hydrogen chemistry, Oxidation-Reduction, Electrochemical Techniques, Ibuprofen chemistry, Models, Chemical, Nanotubes chemistry, Titanium chemistry
- Abstract
This study employed BiOI-deposited TiO
2 nanotube arrays (BiOI-TNTAs) electrode in a photoelectrochemical (PEC) system to oxidize Ibuprofen and generate hydrogen in the anodic and cathodic chamber, respectively. FESEM results revealed the diameter of TiO2 nanotubes was 90-110nm. According to the XRD analysis, the BiOI-TNTAs were dominated by the anatase phase and tetragonal structure of BiOI. XPS results confirmed the coexistence of BiOI in the BiOI-TNTAs associated with Bi (33.76%) and I (8.81%). UV-vis absorption spectra illustrated BiOI-TNTAs exhibit strong absorptions in the visible light region. The PEC method showed the best degradation efficiency for Ibuprofen is a rate constant of 3.21×10-2 min-1 . The results of the Nyquist plot revealed the recombination of photogenerated electron-hole pairs was inhibited as the bias potential was applied. Furthermore, the Bode plot demonstrated the lifetime (τel ) of photoexcited electrons of BiOI-TNTAs was 1.8 and 4.1 times longer than that of BiOI-Ti and TNTAs, respectively. In the cathodic chamber, the amount of hydrogen generation reached 219.94μM/cm2 after 3h of reaction time., (Copyright © 2018 Elsevier B.V. All rights reserved.)- Published
- 2018
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