The Visible Light Activity of the TiO₂ and TiO₂:V⁴⁺ Photocatalyst

Abstract

TiO2 and vanadium-doped TiO2 nanoparticles were synthesized by using the hydrothermal method. The V doping contents are 0.0; 0.1; 0.3; 0.5; 0.7 and 0.9% molar.The vanadium-doped TiO2 nanoparticles have identical anatase phase with an average crystal size of 10-20nm. The oleic acid and ethanol solvents with different molar concentrations can make spherical nanograins, or stick form grains, which influence the photo activity of the materials. The absorption spectra of doped samples exhibited longtailed absorption in the visible light region above 380nm.The visible light photocatalytic activity was evaluated by the degradation of phenol aqueous solutions; after 360 min. under the visible irradiation, the normalized concentration of phenol decreased to 9%.

Sequential Processes to Produce N-TiO2Films Through Rf Plasmas

“…It is remarkable that the E 1g vibration band, it is very intense and acute, similar conditions have been reported by other researchers [31], [28], [25]. In Table 1 shows that after the doping process with nitrogen, the N-TiO 2 film has a vibrational band right shifted, indicating that the particle size has been increased, this effect has been observed by others authors [32], [33]. Later is consistent with the results of XRD.…”

Characterization of TiO2 Nanofilms Obtained by Sol-Gel and Anodic Oxidation

“…The characteristics of the films, such as thickness, morphology and structure, are presented and compared with the aim of establishing the parameters of each process, which could produce suitable TiO2 thin films as coatings of Ti6Al-4V prosthetic heart valves. On the other hand, knowing how different parameters affect the technical properties of coatings could allow the synthesizing of these nano-TiO2 films for various technological applications related to biocompatible [23] and environmental features [24,25].…”

Aktivitas Antibakteri TiO2-Anatas Terdadah -Vanadium dan -Kromium

“…Ion logam, seperti: V, Mn, Fe, Cu, Ce, W, Cr, Co, Ag, dll. secara luas digunakan sebagai pendadah (Liu et al, 2009;Tian et al, 2012;Thuy et al, 2012;Chang and Liu, 2014;Zhang et al, 2013;Yang et al, 2014;Al-Hartomy, 2014). Pergeseran kinerja kearah sinar tampak dapat memfasilitasi dan mempercepat pengembangan material untuk dekontaminasi sumber air menggunakan sinar matahari karena biaya lebih ekonomis daripada menggunakan sinar ultraviolet.…”