Innovative visible light-activated sulfur doped TiO2 films for water treatment

Nitrogen and copper doped solar light active TiO2 photocatalysts for water decontamination

“…Previous studies have reported on the applications of titanium dioxide species to the remediation of microbial [9] and chemical [10][11][12] contaminants, and have also characterized the behavior of titania particles doped with copper and other transition metals [21]. However, to our knowledge, this is the first attempt to characterize the ability of a self-adhered nitrogen-or copper-doped titania thin film to degrade chemical and microbial contaminants in water.…”

“…Studies have demonstrated the ability of TiO 2 to accelerate the sunlight-mediated inactivation of microorganisms [9] and the degradation of organic and inorganic contaminants [10][11][12]. Studies using suspended titania photocatalysts in water have typically demonstrated greater efficacy than studies using heterogeneous photocatalysts immobilized on substrates [13].…”

Influence of the chemical synthesis on the physicochemical properties of N-TiO2 nanoparticles

“…N-TiO 2 was characterized by the presence of paramagnetic species whose EPR spectrum has been widely discussed in previous work [4,5,6]. The main paramagnetic species (indicated as N i O • ) was present in all samples investigated ( Fig.…”

“…Different strategies have been followed until now to reach this target such as doping with transition metal ions or surface sensitization with organic and organometallic dyes. More recently, doping TiO 2 with p-block (N, F, C, S) elements and in particular with nitrogen, has attracted the attention of the photocatalytic community as the introduction of such elements in the crystalline network produces materials capable of absorbing photons corresponding to visible radiation [2][3][4][5].…”

Prototype composite membranes of partially reduced graphene oxide/TiO2 for photocatalytic ultrafiltration water treatment under visible light

“…Following the spreading of visible-light-active materials and technologies using solar radiation, like photovoltaics and optical fibers, attempts to extend the photoresponse of TiO 2 into the visible region and exploitation of solar light driven applications has become a topic of great interest. Surface modification of TiO 2 by anion or metal doping [23][24][25][26], or the development of composites with carbon materials like carbon nanotubes (CNTs), fullerenes, graphene, nanodiamonds and other nanocarbons mainly of graphitic type, have led to significant enhancement of their photocatalytic activity under visible light [27][28][29].…”