Preparation of Co-doped TiO2 for Photocatalytic Degradation of NOx in Air under Visible Light

Abstract

Co-doped visible light active photocatalysts were obtained by chemical modification of TiO

Enhancing the physical properties and photocatalytic activity of TiO2 nanoparticles via cobalt doping

“…For example, the bandgap energy of pure TiO 2 is significant (3–3.2 eV), corresponding to ultraviolet radiation such that a small portion of the solar spectrum is absorbed in the UV region, which decreases the photocatalytic activity. 10,11 The photocatalytic activity of TiO 2 is enhanced by doping due to the narrowing of the band gap. With doping, new mid-gap energy states are introduced at the top of the conduction band and thus narrow the band gap such that the absorption edge is extended from the UV-region to the Vis-light region.…”

New Holistic Conceptual Framework for the Assessment of the Performance of Photocatalytic Pavement

“…Actually, the situation is much more complex than this, as the amount of UV-A in the solar radiation reaching the Earth surface is extremely dependent on the latitude and time of the year (Folli et al, 2014). Significant efforts have been carried out to extend the absorption range and to increase the absorbed photon flux (Bengtsson et al, 2009;Rehman et al, 2009;Folli and Macphee, 2016). The scoring of this subindicator was designed to account for current and future photocatalysts, giving the photocatalysts with the red bound of the absorption spectrum in cyan (475-495 nm: 2.612-2.506 eV) a higher score, followed by the blue (450-475 nm: 2.757-2.612 eV) and violet (380-450 nm: 3.265-2.757 eV) ranges.…”

Pollution Control Applications of Nano Titanium Dioxide in the Construction Industry

“…So, to make use of most of the visible rays from the sun, Nano-TiO 2 is either doped with another element/compound, or the structure modification is done so that the bandgap is altered and the corresponding wavelength required is favorable. Many dopants have been used by researchers around the world like Sulfur, SnO 2 , MnO 2 , Iron, Vanadium, Cobalt, etc (19). Dopants are selected based on their availability and their ability to alter the properties of the catalyst.…”