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Photocatalytic degradation of 4-chlorophenol

Venkatachalam, N., Palanichamy, M., Arabindoo, B. and Murugesan, V. (2007) Enhanced photocatalytic degradation of 4-chlorophenol by Zr4 + doped nano Ti02. Journal of Molecular Catalysis A Chemical, 266, 158-165. [Pg.243]

P.V. Kamat, Electrochemically assisted photocatalysis titania particulate film electrodes for photocatalytic degradation of 4-chlorophenol, J. Phys. Chem. 97 (1993) 9040-9044. [Pg.381]

To this purpose, in a study on the photocatalytic degradation of 4-chlorophenol, Camera-Roda and Santarelli [89] proposed an integrated system in which photocatalysis is coupled with pervaporation as process intensification for water detoxification. Pervaporation represents a useful separation process in the case of the removal of VOCs and in this study it is used to remove continuously and at higher rate the organic intermediates that are formed in the first steps of the photocatalytic degradation of the weakly permeable 4-CP. [Pg.351]

Li X, Cubbage JW, TetzlaffTA, Jenks WS. Photocatalytic degradation of 4-chlorophenol 1. The hydroquinone pathway. J Org Chem 1999 64 8509-8524. [Pg.124]

Stafford, U. Gray, K. A. Kamat, P. V. Varma, A. An in situ diffuse reflectance FTIR investigation of photocatalytic degradation of 4-chlorophenol on a Ti02 powder surface, Chem. Phys. Lett. 1993, 205, 55. [Pg.349]

Stafford U, Gray KA, Kamat PV. Radiolytic and Ti02-assisted photocatalytic degradation of 4-chlorophenol. A comparative study. J Phys Chem 1994 98 6343-51. [Pg.373]

Theurich J, Lindner M, Bahnemann DW. Photocatalytic degradation of 4-chlorophenol in aerated aqueous titanium dioxide suspensions a kinetic and mechanistic study. Langmuir 1996 12 6368-76. [Pg.373]

Mills et al. performed extensive investigations into the photocatalytic degradation of 4-chlorophenol. These included studies on the effects of different titania samples [102], effects of annealing temperature on the photocatalytic efficiency of titania [ 103] and a mechanistic study of the decomposition process. The rate of chlorophenol destruction was found to drop when using titania photo catalysts that had been heated above 600 °C. This was believed to be due to a build up of the rutile phase and a reduction of surface area following heat treatment above these temperatures. A number of intermediates were reported including 4-chlorocatechol, hydroquinone, benzoquinone and 4-chlororesorcinol [104],... [Pg.386]

Figure 16 Reaction pathway suggested for the photocatalytic degradation of 4-chlorophenol in acidic medium. Figure 16 Reaction pathway suggested for the photocatalytic degradation of 4-chlorophenol in acidic medium.
Table 10 has been reproduced from Appl. Catal. B Environ. Reference Satuf et al., 2008, Photocatalytic degradation of 4-chlorophenol A kinetic Study, Table 4 Copyright 2008, with permission from Elsevier Ltd. Table 10 has been reproduced from Appl. Catal. B Environ. Reference Satuf et al., 2008, Photocatalytic degradation of 4-chlorophenol A kinetic Study, Table 4 Copyright 2008, with permission from Elsevier Ltd.
Satuf, M.L., Brandi, R.J., Cassano, A.E., and Alfano O.M., Scaling-up of slurry reactors for the photocatalytic degradation of 4-chlorophenol . Catal. Today, 129, 110 (2007b). [Pg.288]

Photocatalytic Degradation of 4-Chlorophenol in Ti02 Aqueous Suspensions... [Pg.291]

Photocatalytic degradation of 4-chlorophenol in TiOz aqueous suspensions produces 4-chlorocatechol, an ortho hydroxylated product, as the main intermediate. This result disagrees with data reported by other researchers, who proposed the formation of a para-hydroxylated product, hydroquinone, as the major intermediate. Results also indicated that further oxidation of 4-chlorocatechol yields hydroxy hydroquinone, which can readily be oxidized and mineralized to carbon dioxide. Complete dechlorination and mineralization of 4-chlorophenol can be achieved. In contrast, direct photolysis of 4-chlorophenol produces hydroquinone and p-benzoquinorie as the main reaction products. The photocatalytic oxidation reaction, initially mediated by TiO2, is generated by an electrophilic reaction of the hydroxyl radical attacking the benzene ring. [Pg.291]

Figure 5. Mass spectra of derivatized intermediates from the photocatalytic degradation of 4-chlorophenol. Experimental conditions 4-chlorophenol = 10 3 M, TiO2 = 1 g/L, pH = 4.0, I = 5 X 10 2 M NaN03, oxygen atmosphere, temperature = 25 °C. Peak A is 4-Chlorophenol, peak B is hydroquinone, peak C is 4-chlorocatechol, and peak D is 4-chlororesorcinol. Figure 5. Mass spectra of derivatized intermediates from the photocatalytic degradation of 4-chlorophenol. Experimental conditions 4-chlorophenol = 10 3 M, TiO2 = 1 g/L, pH = 4.0, I = 5 X 10 2 M NaN03, oxygen atmosphere, temperature = 25 °C. Peak A is 4-Chlorophenol, peak B is hydroquinone, peak C is 4-chlorocatechol, and peak D is 4-chlororesorcinol.
Hermann, J.M., Matos, J., Disdier, J., et al. (1999). Solar photocatalytic degradation of 4-chlorophenol using the synergistic effect between titania and activated carbon in aqueous suspension. Catal. Today, 54(2-3), 255—65. [Pg.652]

STAFFORD, U., GRAY, K. A., KAMAT, P. V., Radiolytic and Ti02-Assisted Photocatalytic Degradation of 4-Chlorophenol. A Comparative Study , J. Phys. Chem. 1994, 98, 6343-6351. [Pg.13]

Photocatalytic degradation of 4-chlorophenol in an aqueous solution under visible light... [Pg.581]

Peill, N. J., and Hoffmann, M. R., 1995, Development and optimization of a Ti02 coated fiber - optic cable reactor Photocatalytic degradation of 4-chlorophenol, Env. Sci. Tech., 29 2974-2981. [Pg.46]


See other pages where Photocatalytic degradation of 4-chlorophenol is mentioned: [Pg.283]    [Pg.124]    [Pg.316]    [Pg.343]    [Pg.343]    [Pg.351]    [Pg.288]    [Pg.292]    [Pg.1085]    [Pg.283]    [Pg.299]    [Pg.885]   
See also in sourсe #XX -- [ Pg.292 , Pg.302 , Pg.303 ]

See also in sourсe #XX -- [ Pg.292 ]




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4-Chlorophenol

Chlorophenols

Of chlorophenols

Photocatalytic

Photocatalytic degradation

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