Photoassisted Degradation (in the UV) of Phenyltin(IV) Chlorides in the Presence of Titanium Dioxide

Abstract

The photoassisted degradation of phenyltin(IV) chlorides in air-equilibrated aqueous TiO2 suspension has been studied. The stability of the triphenyltin(IV) derivative in aqueous solutions at different pH values and the extent of adsorption of tri-and diphenyltin(IV) chloride species were examined. Particular interest is focused on the TiO2-assisted photodegradation of phenyltin species. Detailed surface analyses of the catalyst particles by IR and of the liquid medium by GC-MS are reported. A mechanism consisting of interfacial trapping of a photogenerated electron-hole pair can explain the TiO2-photoassisted degradation of phenyltin species. The results are compared with those previously reported on the photolytic degradation of theses species in water and with those of n-butyltin species (photolytic and TiO2-photoassisted). Our results allow that this is not a photocatalysis system but a photoassisted one in the presence of TiO2.

Notice of Retraction: Air Cleaning Paper Based on the Enhanced Photocatalytic Activity of Nano-TiO2/ZnO

“…TiO 2 , because of its excellent chemical and photochemical stability, non-toxic, and capability of photo-oxidative destruction of most organic pollutants [1][2][3][4], has a wide range of technologically relevant applications such as gas sensors, photo and thermal catalysis, photo-electrocatalysis [5][6][7]. Most of organic compounds involving environmental pollutants can be oxidized to CO 2 by the hydroxyl radicals produced on the TiO 2 surfaces when nano-TiO 2 absorbs photons with greater energies than the band gap [8][9][10].…”

Photoelectrochemical activity of liquid phase deposited TiO2 film for degradation of benzotriazole

“…Among these, TiO 2 is one of the most important photocatalyst due to its excellent physical and chemical properties such as low photocorrosive and toxic characteristics, and capability of completing mineralization of the pollutants into less toxic or harmless compounds [16][17][18]. However, a costly and difficult posttreatment process is required to separate slurry TiO 2 [19], although the slurry TiO 2 is efficient in the photodegradation of organic pollutants.…”

Photoinduced degradation by iron(III): removal of triphenyltin chloride from water

“…Because of the very low value of Φ, degradation of TPT was investigated by the action of powdered TiO 2 under UV illumination in aqueous solution. 5 However, the rate constant for the photodegradation of TPT in the presence of TiO 2 is slightly lower than in the absence of the catalyst. Degradation of several water pollutants photoinduced by iron(III) has been studied in our laboratory.…”