Photo electrocatalytic degradation 2,4-dichlorophenoxyacetic acid in water using NiTiO2-NT/AC-PTFE electrode under ultraviolet and visible irradiation: Electrode fabrication and toxicity test
Year: 2024
Type: article
Abstract: The degradation of 2,4-Dichlorophenoxyacetic acid (2,4-D) pesticide by photo-electrocatalytic process (PEC) equipped with special NiTiO2-NT/AC-PTFE electrodes was evaluated. The NiTiO2-NT/AC-PTFE electrodes were prepared by electrodepositing method and doping Ni into TiO2 nanotubes. After that, fabricated electrodes were characterized using SEM, EDX, and XRD analyses. The results showed that increasing the flow rate, electrolyte concentration, and time, except for the pesticide concentration, led to an increase in the process efficiency. Additionally, Ni doping, increases the removal efficiency of 2,4-D in the UV and visible light range. The results showed that the use of an ultraviolet light source indicated a higher degradation in nickel concentration of 0.5 mg/L compared to 0.25 mg/L. Ni (as a conductive) bonding on TiO2, for the creation of an inner electric field at the jointing among the two materials, increases the differentiation of electron-hole, consequently increasing the removal efficiency. Under the condition of a 90-minute timeout, 0.1 A current, electrolyte concentration of 125 mg/L, and UV light source, the pesticide removal efficiency reached 90%. Therefore, the PEC process with the NiTiO2-NT/AC-PTFE electrode is as a relatively high-performance process for degrading 2,4-D from aqueous solutions. The organic byproducts were also identified by GC–MS analysis and toxicity tests were carried out by Chlorella Vulgaris. The high concentration of pesticides increases the inhibition of algae growth due to their effects on algae.
Source: Results in Engineering
Language: English
Subfield: Water Science and Technology
Field: Environmental Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,490
OpenAlex ID: W4404901826