Decoration of Ti/TiO₂Nanotubes with Pt Nanoparticles for Enhanced UV-Vis Light Absorption in Photoelectrocatalytic Process

Continuous-Flow Photocatalytic Degradation of Organics Using Modified TiO2 Nanocomposites

“…The main anatase TiO2 diffraction peaks were located at 25.36°, 48.13°, and 55°, corresponding to (101, (200), and (105) planes, respectively [24]. The rutile peaks were identified at 37.23° and 68.57°, and main Ti peaks were found at 35.10°, 41.10°, 53.98°, and 70.92°.…”

Photoelectrocatalytic/photoelectro-Fenton coupling system using a nanostructured photoanode for the oxidation of a textile dye: Kinetics study and oxidation pathway

“…A potentiostat/galvanostat (AUTOLAB Model PGSTAT 302) was used in the electrochemical assays. The detailed preparation and characterization of the Pt/TiO 2 NT electrode was reported in our previous work (Almeida and Zanoni, 2014).…”

“…Previous studies (Almeida and Zanoni, 2014) have indicated that Pt-decorated TiO 2 nanotubes (Pt/TiO 2 NTs) presented lower band gap energies (2.87 eV) when acting as photoanodes in the PEC system, which promoted high degradation efficiency of acid red 29 dye. Thus, coupling the Pt/TiO 2 NT photoanode with the air-diffusion PTFE cathode (referred to as the coupled PEC/PEF process in this study) could be a good strategy for providing an extra source of Å OH radicals.…”

“…In PEC, when TiO 2 (E bg = 3.21 eV) is irradiated with ultraviolet light, electrons are promoted from the valence band (e À VB ) to the conduction band (e À CB ), generating highly oxidative holes (h + ) in the valence band that produce Å OH radicals on the electrode surface due to water oxidation (Zhang et al, 2012). The PEC method was successfully employed for oxidizing herbicides (Xin et al, 2011), textile dyes (Olya et al, 2013;Almeida and Zanoni, 2014) and pharmaceuticals (Cheng et al, 2013).…”

“…The incorporation of metal nanoparticles, such as Pt (Almeida and Zanoni, 2014), Au (Gao et al, 2014) and Ag (Liu et al, 2014), on the TiO 2 surface is an attractive method for improving the PEC performance because it minimizes electron/hole recombination and amplifies UV-Vis light absorption. Previous studies (Almeida and Zanoni, 2014) have indicated that Pt-decorated TiO 2 nanotubes (Pt/TiO 2 NTs) presented lower band gap energies (2.87 eV) when acting as photoanodes in the PEC system, which promoted high degradation efficiency of acid red 29 dye.…”