Iron/Sulfur Co-Doped Titanium Dioxide Nanotubes: Optimization of the Photoelectrocatalytic Degradation of Phenol Red under Visible Light

Abstract:

Photoelectrocatalysis is a rapidly developing technology for degrading recalcitrant organic compounds in wastewater due to its ability to overcome electron-hole recombination. Herein, we synthesized Fe/S co-doped TiO₂ nanotubes through an in-situ anodization technique. We developed a simple reduced quadratic model based on response surface modeling which can be used to adequately correlate the operating parameters with the photoelectrocatalytic performance of Fe/S-TiNTs in degrading phenol red. Predicted maximum dye degradation of 54.78% was achieved by the generated model using the optimized parameters: initial phenol red concentration = 5.22 mg L^-1, applied voltage = 27.4 V, and dopant loading = 2.97 wt.%. Upon validation, experimental maximum phenol degradation of 53.24% was obtained, which agrees well with the predicted value within statistical significance. Overall, our model can be potentially used for process optimization within the design space studied.

• Periodical: Key Engineering Materials (Volume 847)
• Pages: 95-101
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.847.95
• Online since: June 2020
• Authors: Edgar Clyde R. Lopez, Nicole Elyse B. Saputil, Lance A. Loza, Fiona Fritz G. Camiguing, Marlon L. Mopon Jr., Jem Valerie D. Perez*
• Keywords: Co-Doping, In Situ Anodization, Photoelectrocatalysis, Titanium Dioxide Nanotubes

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