Kinetics of crystal violet dyes photocatalytic degradation in an aqueous media using TiO2 nanoparticles synthesized from Tithonia diversifolia leaf crude extracts
نویسندگان
1 Department of Chemistry and Biochemistry, Laikipia University, P.O. BOX 1100-20300, Nyahururu, Kenya
2 Department of Chemistry and Biochemistry, Laikipia University, P.O. BOX 1100-20300, Nyahururu, Kenya
doi
10.22090/jwent.2025.02.005چکیده
The current study focused on the degradation of crystal violet (CV) dyes using TiO2 nanoparticles under UV light irradiation. The TiO2-NPs were biosynthesized using Tithonia diversifolia leaf crude extracts. They were then characterized using FT-IR, XRD, TGA, SEM-EDX, and UV-visible spectrophotometer and employed in dye photodegradation experiments. The T. diversifolia-mediated TiO2-NPs showed a maximum absorbance of 280 nm. The spectroscopic analysis showed thermally stable TiO2 nanoparticles dominated by the anatase phase with Ti-O-Ti and Ti-O functional groups. The nanoparticle efficiency (89.54 %) was greatly influenced by pH (9), interaction time (50 minutes), dosage (30 mg), and concentration (40 mg/L). The kinetic plots indicated that the rate of CV photodegradation followed pseudo-first-order degradation mechanisms. The regeneration studies showed that the TiO2-NPs can be reused with a high degradation efficiency (> 60 %). The findings of the study report a novel, ecologically friendly, and cost-effective technique for TiO2-NPs synthesis for dye wastewater treatment.
