Demineralization of organic pollutants on the dye modified TiO2 semiconductor particulate system using visible light

Photocatalytic Activities of TiO2 Modified by Poly(fluorene- co-bithiophene) under Visible Light

“…It showed that little phenol was decomposed with pure TiO 2 under visible light, while with PFB/TiO 2 nearly 75% of the phenol was removed. It is suggested that PFB is an effective photosensitizer, as has been reported for some dyes [9][10][11]. Kinetically, the degradation reaction showed the firs-order behavior.…”

“…This indicated that interactions between TiO 2 and PFB were responsible for the photocatalytic degradation, because neither TiO 2 nor PFB alone is effective. It is generally believed [10,11] that upon visible light irradiation, the photosensitizer adsorbed onto the surface of TiO 2 gets excited and injects an electron into the conduction band of TiO 2 . This conduction band electron is subsequently captured by dioxygen adsorbed onto the surface of TiO 2 and induces the generation of ·O 2 -/HO· radicals which attack organic pollutants to yield the ultimate products.…”

“…Recently many studies have been devoted to improving photocatalytic activity under the visible light by surface modifying TiO 2 using dyes. Great success was achieved in the field of dye-sensitized solar cell [7,8] as well as the dye-sensitized TiO 2 for photocatalytic degradation of the organic pollutions [9][10][11]. Three basic processes are involved in the dye sensitizing semiconductor.…”

Visible Light Solar Photocatalytic Degradation of Pulp and Paper Wastewater Using Dye-Sensitised Tio2

“…They are much better adapted to small scale operations and make use of diffused radiation. [9][10] In this study, the evaluation of the photocatalytic activity of surface modified, dye-sensitised TiO 2 is done to effectively reduce the TOC and COD of pulp and paper mill effluent. Experimental parameters taken into account are the catalyst loading and the initial concentration of the effluent.…”

The Synergistic Effect of Nitrogen and Ni2O3over TiO2Photocatalyst in the Degradation of 2,4,6-Trichlorophenol Under Visible Light

“…More recently, much interest has been focused on the surface modification of TiO 2 with organic dyes for the construction of dye-sensitized photocatalytic systems under visible light irradiation. 11 Since the dye molecules are generally absorbed on rather than chemically bonded to the surface of TiO 2 , a gradual decrease in photocatalytic activity has been observed. To increase the efficiency, the e − /h + recombination rate needs to be reduced.…”