Parameters affecting carbofuran photocatalytic degradation in water using ZnO nanoparticles

Abstract

Carbofuran photodegradation in water using zinc oxide nanoparticles as a catalyst was examined as well as some parameters influencing its percentage degradation rate such as zinc oxide load, initial concentration of carbofuran, the temperature of the reaction, the initial pH of the solution, and doping of zinc oxide nanoparticles with 5% (w:w) silver. Zinc oxide and Ag-doped zinc oxide nanoparticles were produced using solvothermal and photoreduction methods, respectively, and silver doping effects on the structural, optical, and photocatalytic properties of zinc oxide nanoparticles were investigated using XRD, UV-VIS spectrophotometer, TEM, SEM, SEM/EDX, and FTIR. The average diameter of the synthesized samples was 26.6, 30.55 nm for undoped zinc oxide and Ag-doped zinc oxide, respectively. Zinc oxide doping with silver did not change the shape of the zinc oxide crystal, but decreased the reflection in the visible region, as well as the energy of the bandgap, and increased the zinc oxide photocatalytic activity.

Visible light‐excited surface plasmon resonance charge transfer significantly improves the photocatalytic activities of ZnO semiconductor for pollutants degradation

“…It is clear that ZnO shows absorption edge at 377 nm wavelength indicating a direct band gap of 3.30 eV. [ 39 ] However, when Au nanoparticles are loaded on the surface of ZnO nanoparticles, the abortion edge is significantly improved and shifted to 580 nm with sufficient increase in visible light absorption. Further, the light absorption is progressively increased when the amount of Au nanoparticles is increased.…”

Synergy of Nd:YAG Picosecond Pulsed Laser Irradiation and Electrochemical Anodization in the Formation of TiO2 Nanostructures for the Photocatalytic Degradation of Pesticide Carbofuran

“…Photonics 2024, 11, x FOR PEER REVIEW 11 of (54.8%). The change in CBF concentration was followed by its characteristic absorptio band (λ = 275 nm) (inset Figure 7a) [52]. The introduction of atomic-scale defects Ti 3+ and VO in the L15TiO2 and L30TiO samples was a crucial step that significantly reduced the recombination of eˉ and h thereby improving the photocatalytic activity of the irradiated samples.…”

“…The results are shown in Figure 7b, indicating that L15TiO 2 (71.4%) and L30TiO 2 (85.1%) exhibit better photocatalytic performance than TiO 2 (54.8%). The change in CBF concentration was followed by its characteristic absorption band (λ = 275 nm) (inset Figure 7a) [52].…”

Photodegradation of Carbofuran in Paddy Water Samples

“…The pesticide's photodegradation rate is substantially faster in seawater, pond water, and humic acid solutions than in distilled water at the same pH values, implying that dissolved organic matter is indirectly sensitized in photodegradation, a critical loss mechanism. While carbofuran degrades more rapidly in river water than seawater, the addition of humic acids has been shown to lower the direct photolysis rate of carbofuran (Atwan et al 2020;Campbell et al 2004;Iwafune 2018).…”