Pretreatment of the photocatalyst and the photocatalytic degradation of trichloroethylene in the gas-phase

Photocatalytic degradation of trichloroethylene using N-doped TiO2 prepared by a simple sol–gel process

“…In addition to this, the relative rate of the rise in CO 2 to the decay of TCE during visible irradiation was also faster than that during UV irradiation. This result is supported by the reaction mechanism that the by-products are CO and CO 2 , respectively, when COCl 2 is produced via DCAC and directly from TCE [22]. There are, however, also other reaction processes that produce CO, CO 2 , and HCl.…”

“…Three typical characteristic IR bands of TCE at 944 cm -1 (C-Cl stretching), 849 cm -1 (C-Cl stretching), and 783 cm -1 (C-H bending) rapidly decreased on UV irradiation. In addition to these, CO (2,231-2,066 cm -1 ), CO 2 (2,398-2,280 cm -1 ), COCl 2 (856 cm -1 ), HCl (3,037-2,723 cm -1 ), and dichloroacetyl chloride (DCAC) (800 and 741 cm -1 ) were mainly produced during the reaction [10,13,16,21,22,26]. The degradation of TCE was confirmed by these IR measurements.…”

“…Because of careless handling, such chemical materials have contaminated air, soil, rivers, and groundwater throughout the world. Because photocatalytic degradation of TCE is very important environmentally and ecologically, the products obtained have been globally investigated and reaction mechanisms have been suggested [16,[19][20][21][22][23][24][25][26]. It is very important to investigate the photocatalytic degradation of TCE and its reaction mechanism to examine the reactivity and stability of the prepared N-doped TiO 2 and, furthermore, to acquire detailed information for design of effective photocatalysts.…”

Lead removal kinetics from synthetic effluents using Algerian pine, beech and fir sawdust’s: optimization and adsorption mechanism

“…9 where the amount of Pb(II) ions adsorbed per mass unit of sawdust (q e ) was plotted as function of temperature. So the lead adsorption is an exothermic phenomenon since it is favored at low temperature (Jianga et al 2009;Kim et al 1999). This fact can be explained either by the higher mobility of ions at high temperature or by the destruction or solubilisation of adsorption sites.…”

Modeling of a multiannular photocatalytic reactor for perchloroethylene degradation in air

“…Most of the scientific literature concerning the photocatalytic degradation of chlorinated ethylenes in the gas phase report studies based on trichloroethylene (TCE) as the model compound 3‐10. Few studies on tetrachloroethylene (or PCE) oxidation can be found in the scientific literature,11, 12 in which all of them use a reaction scheme similar to that of TCE.…”