Gas-Phase Photooxidation of Trichloroethylene on TiO<sub>2</sub> and ZnO:  Influence of Trichloroethylene Pressure, Oxygen Pressure, and the Photocatalyst Surface on the Product Distribution

Driessen, Michelle; Goodman, Angela; Miller, T.; Zaharias, G. A.; Grassian, Vicki H.

doi:10.1021/jp972351e

Cited by 104 publications

(42 citation statements)

References 24 publications

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“…The amount of DCAC adsorbed on Sample T was three times greater than the initial amount of TCE. It is reported that TiO 2 can adsorb DCAC to some extent [17][18][19]24,29]. The adsorption capacities of Samples M and C for DCAC are about four times greater than that of Sample T. Figure 3 shows the changes in the average degradation rate of TCE during the repeated runs using Samples T, M, and C. The degradation rate increased with the repeated run for all the samples.…”

Section: Photocatalytic Degradation Of Tcementioning

confidence: 97%

Degradation of trichloroethylene using highly adsorptive allophane–TiO2 nanocomposite

Nishikiori¹,

Furukawa²,

Fujii³

2011

Applied Catalysis B: Environmental

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A highly adsorptive allophane−TiO 2 nanocomposite photocatalyst was prepared by dispersing nanoparticles of the natural clay mineral allophane into a titanium alkoxide solution by the sol-gel method. During the photocatalytic degradation of trichloroethylene using the allophane−TiO 2 nanocomposite, emission of the intermediate product, phosgene, was drastically inhibited.Trichloroethylene was transformed into the intermediate products,phosgene and dichloroacetyl chloride, on the TiO 2 during the UV irradiation. These compounds are rapidly adsorbed on the allophane. The compounds then gradually degraded after diffusing to the TiO 2 .

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Section: Photocatalytic Degradation Of Tcementioning

confidence: 97%

Degradation of trichloroethylene using highly adsorptive allophane–TiO2 nanocomposite

Nishikiori¹,

Furukawa²,

Fujii³

2011

Applied Catalysis B: Environmental

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“…Similar to phosgene, trichloroacetaldehyde is also oxidized in combined system; following pathways for photocatalytic destruction of trichloroacetaldehyde have been reported (Driessen et al 1998;Fan and Yates 1996).…”

Section: By-productsmentioning

confidence: 94%

Decomposition of gas-phase chloroform using nanophotocatalyst downstream the novel non-thermal plasma reactor: by-products elimination

Shahna

Ebrahimi

Jaleh

et al. 2015

Int. J. Environ. Sci. Technol.

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Combination the non-thermal plasma technique by photocatalytic oxidation can enhance volatile organic compounds degradation. In this study, the decomposition of chloroform vapors in a novel non-thermal plasma reactor as well as an integrated system of this reactor in conjunction with the photocatalysis process was investigated. Expanded graphite was used as discharge electrode of dielectric barrier discharge reactor and the support of TiO 2 and ZnO catalysts as well. Results showed that chloroform degradation increased in hybrid system. The non-thermal plasma reactor had high content of NO and NO 2 , whereas the concentration of these two pollutants dropped dramatically in hybrid system; moreover, the generated ozone from the non-thermal plasma process was degraded on the photocatalyst and consequently was not detected in the output gas of the combined system. The generated organic by-products in non-thermal plasma process (phosgene and trichloroacetaldehyde) were reoxidized with un-oxidized chloroform in the second stage of the combined system. This increased the selectivity of CO 2 and Cl 2 .

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“…They reported that the degradation of TCE proceeded by active species, such as the hydroxyl radical, chlorine radicals [3,5−7,10−17], and adsorbed oxygen species [8,9].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic degradation of chlorinated propenes using TiO2

Nishikiori

Sato

Oki³

et al. 2014

Res Chem Intermed

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The photocatalytic degradation of chlorinated propenes using TiO 2 was investigated by FTIR spectroscopy. The chlorinated propenes were degraded to HCl, CO 2 , CO, H 2 O, and HCOOH during UV irradiation.During the degradation of 3-chloro-1-propene, the concentrations of CO 2 , CO, and HCOOH increased just after starting the irradiation.The onset of the HCl formation was delayed. On the other hand, the onset of the HCOOH formation was delayed during the degradation of 1-chloro-1-propene. During the degradation of 2-chloro-1-propene, the rate of the HCOOH production was slower than that during the degradation of 3-chloro-1-propene although the HCl production was not delayed. These results indicated that HCOOH was produced by the degradation of the double-bonded carbon bonding to two H atoms during the initial stage. The chlorinated compounds were preferentially produced from the double-bonded carbon bonding to the Cl atom and rapidly degraded to HCl, CO 2 , and CO during the initial stage. The residual part was degraded in the latter steps. Furthermore, it is suggested that the Cl atom on one of the double-bonded C atoms of the propenes was transferred to the other C atom before the degradation. Consequently, the double-bonded carbon bonding to two H atoms in 2-chloro-1-propene was chlorinated, then degraded to HCl, CO 2 , and CO during the initial stage.

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Gas-Phase Photooxidation of Trichloroethylene on TiO₂ and ZnO: Influence of Trichloroethylene Pressure, Oxygen Pressure, and the Photocatalyst Surface on the Product Distribution

Cited by 104 publications

References 24 publications

Degradation of trichloroethylene using highly adsorptive allophane–TiO2 nanocomposite

Degradation of trichloroethylene using highly adsorptive allophane–TiO2 nanocomposite

Decomposition of gas-phase chloroform using nanophotocatalyst downstream the novel non-thermal plasma reactor: by-products elimination

Photocatalytic degradation of chlorinated propenes using TiO2

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Gas-Phase Photooxidation of Trichloroethylene on TiO2 and ZnO: Influence of Trichloroethylene Pressure, Oxygen Pressure, and the Photocatalyst Surface on the Product Distribution

Cited by 104 publications

References 24 publications

Degradation of trichloroethylene using highly adsorptive allophane–TiO2 nanocomposite

Degradation of trichloroethylene using highly adsorptive allophane–TiO2 nanocomposite

Decomposition of gas-phase chloroform using nanophotocatalyst downstream the novel non-thermal plasma reactor: by-products elimination

Photocatalytic degradation of chlorinated propenes using TiO2

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Gas-Phase Photooxidation of Trichloroethylene on TiO₂ and ZnO: Influence of Trichloroethylene Pressure, Oxygen Pressure, and the Photocatalyst Surface on the Product Distribution