Improvement of photocatalytic degradation of organic dyes by vanadium doped titanium oxide nanoparticles using solar simulator
Year: 2025
Type: article
Abstract: The removal of complex organic contaminants and pollutants from water, the heterogeneous photocatalytic degradation of methylene blue (MB), Eosin, Fluorescein and Rhodamine 6G (Rh 6G) dyes were studied using vanadium-doped titanium oxide nanoparticles (V-TiO 2 NP s ) as a derived catalyst, incorporated in a Polyvinyl Alcohol (PVA) solution as a host to form thin films doped from dyes and V-TiO 2 NP s . Solar simulator light was tested for the photodegradation process. Vanadium-doped titanium oxide nanoparticles (V-TiO 2 NP s ) was successfully synthesized by a sol-gel technique and the solid-state thin films of PVA/dye/V-TiO 2 were prepared by a casting method. The chemical synthesis of V-TiO 2 NP s was confirmed by X-ray diffractograms, Energy Dispersive X-ray (EDX), High Resolution Transmission Electron [HRTEM] and Fourier transform infrared spectroscopy [FTIR]. We had studied the effect of V-TiO 2 NP s as a catalyst to enhance the photocatalytic activity of different organic dyes and we found that the vanadium doped TiO 2 nanoparticle behave as the best catalyst for successfully photodegraded of Methylene Blue (MB), Eosin and Fluorescein dyes but effect of V-TiO 2 NP s as a catalyst on the photodegradation of Rh 6G dye take a more time to degraded under solar simulator. The V-TiO 2 nanoparticles displayed eminent realization for achieving nearly 99% degradation of MB, 97% of Fluorescein, 99% of Eosin after 120 min. So, the V-TiO 2 NPs can be used as a pollutant removal in the wastewater application. But from the results of photocatalytic performance of Rh 6G, we noticed that the photodegradation of Rh 6G dye in the presence of V-TiO 2 NPs is weak as 50% photodegraded after 300 min and this is due to the strong reaction between the catalyst and Rh 6G dye. In this case, V-TiO 2 NPs behave as a photostabilizer for Rh 6G dye under solar simulator and this structure (Rh 6G/V-TiO 2 ) can be apply as a photoanode in a dye sensitized solar cell application. The optical band gap energy of V-TiO 2 NP s with a MB, Eosin and Fluorescein dyes were calculated at zero minute and at 120 min but the band gap energy for Rh 6G dye with a catalyst was calculated at 300 min and we found that the band gap energy was increased by increasing exposure time. From the observation to measure the pseudo-first-order rate constants of four dyes were computed. The photodegradation percentage was determined and found that the photodegradation percentage of MB, Eosin and Fluorescein in the presence of the of V-TiO 2 NP s as a catalyst is higher than the photodegradation percentage of pure dyes.
Source: Scientific Reports
Authors: Moustafa. E. Elsisi, A. F. Mansour
Institution: Zagazig University
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,690
OpenAlex ID: W4410922662