Cargando…
Room Temperature Synthesis of V-Doped TiO(2) and Its Photocatalytic Activity in the Removal of Caffeine under UV Irradiation
In this work, the influence of simple acids in the room temperature sol-gel synthesis of TiO(2) was investigated and the efficiency of prepared photocatalysts was evaluated in the removal of caffeine. To improve the photoactivity of TiO(2), vanadium-doped TiO(2) (VTiO(2)) samples were obtained start...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6472005/ https://www.ncbi.nlm.nih.gov/pubmed/30893877 http://dx.doi.org/10.3390/ma12060911 |
Sumario: | In this work, the influence of simple acids in the room temperature sol-gel synthesis of TiO(2) was investigated and the efficiency of prepared photocatalysts was evaluated in the removal of caffeine. To improve the photoactivity of TiO(2), vanadium-doped TiO(2) (VTiO(2)) samples were obtained starting from different amount of vanadyl sulphate as a dopant source. The samples were centrifuged, washed and finally dried at room temperature, and no calcination step was carried out. The prepared photocatalysts were characterized by different techniques (X-ray powder diffraction (XRD), specific surface area (SSA), ultraviolet-visible diffuse reflectance spectra (UV-vis DRS) and Raman). VTiO(2) photocatalysts were tested in the photocatalytic removal of aqueous solutions containing caffeine. The photocatalytic tests were carried out in a recirculating batch cylindrical photoreactor irradiated by a UV LEDs strip (nominal power of 12 W and wavelength emission peak at about 365 nm) surrounding the external surface of the reactor. The optimized VTiO(2) photocatalyst was able to reach a caffeine degradation of about 96% after 360 min of UV light irradiation with a total organic carbon (TOC) removal of 72%. |
---|