Heterogeneous photocatalyzed oxidation of creosote components: mineralization of xylenols by illuminated TiO2 in oxygenated aqueous media

Terzian, Rita; Serpone, Nick

doi:10.1016/1010-6030(94)04020-3

Cited by 97 publications

(41 citation statements)

References 15 publications

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“…at low light intensities, h + trapping competes effectively with electron-hole recombination [16,20]. So;…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the surface area of catalyst can increase for forming more OH * radicals. The dependence of reaction rate constant (k p ) on sonolysis power is usually expressed with the following relation [20,34];…”

Section: Effect Of Amplitudementioning

confidence: 99%

“…30 (20,30,35 and 40 ppm) and 200 mg TiO 2 were introduced in this reactor. Solutions were stirred in the dark for 30 min.…”

Section: Acid Red 27 C I Disperse Red 92 and C I Acid Orange 10mentioning

confidence: 99%

“…In some studies the photocatalytic degradation of dyes has been reported as a mechanism; [14][15][16][17] In the photodegradation of dyes by UV radiation in the presence of TiO 2 , the rate-determining step is the reaction (5) between adsorbed OH * radicals and dye according to this mechanism [16,18]. The kinetics of photocatalytic degradation follows the Langmuir-Hinshelwood model and the reaction rate follows pseudo-first order kinetics by considering the steady-state conditions and based on several other literature reports [15,[18][19][20][21]. The kinetic expression is showed in the following form [16]:…”

Section: Introductionmentioning

confidence: 99%

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A Kinetic Study on Photocatalytic and Sonophotocatalytic Degradation of Textile Dyes

Yetim

Tekin

2016

Period. Polytech. Chem. Eng.

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“…at low light intensities, h + trapping competes effectively with electron-hole recombination [16,20]. So;…”

Section: Introductionmentioning

confidence: 99%

Section: Effect Of Amplitudementioning

confidence: 99%

“…30 (20,30,35 and 40 ppm) and 200 mg TiO 2 were introduced in this reactor. Solutions were stirred in the dark for 30 min.…”

Section: Acid Red 27 C I Disperse Red 92 and C I Acid Orange 10mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Kinetic Study on Photocatalytic and Sonophotocatalytic Degradation of Textile Dyes

Yetim

Tekin

2016

Period. Polytech. Chem. Eng.

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“…It is well known that the point of zero charge (pzc) for TiO 2 is at a pH between 5.6 and 6.4 and the surface coated with hydroxyl groups may add or release protons, as shown in the following equilibrium (CHEN and RAY, 1998;TERZIAN and SERPONE, 1995):…”

Section: Effect Of Initial Phmentioning

confidence: 99%

Photocatalytic Degradation of Monolinuron and Linuron in an Aqueous Suspension of Titanium Dioxide Under Simulated Solar Irradiation

Zouaghi

Zertal

David

et al. 2007

rseau

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The photocatalytic degradation of two phenylurea herbicides, monolinuron (MLN) and linuron (LN), was investigated in an aqueous suspension of TiO2 using simulated solar irradiation. The objective of the study was to compare their photocatalytic reactivity and to assess the influence of various parameters such as initial pesticide concentration, catalyst concentration and photonic flux on the photocatalytic degradation rate of MLN and LN. A comparative study of the photocatalytic degradation kinetics of both herbicides showed that these two compounds have a comparable reactivity with TiO2/simulated sun light. Under the operating conditions of this study, the photocatalytic degradation of MLN and LN followed pseudo first-order decay kinetics. The kobs values indicated an inverse dependence on the initial herbicide concentration and were fitted to the Langmuir-Hinshelwood equation. Photocatalytic degradation rates increased with TiO2 dosage, but overdoses did not necessarily increase the photocatalytic efficiency. The degradation rate of MLN increased with radiant flux until an optimum at 580 W m‑2 was reached and then decreased. Under these conditions, an electron-hole recombination was favored. Finally, the photocatalytic degradation rate depended on pH, where an optimum was found at a pH value close to the pH of the point of zero charge (pH = 6).La dégradation photocatalytique de deux herbicides, le monolinuron (MLN) et le linuron (LN), a été étudiée dans une suspension de TiO2 au contact de lumière solaire simulée. L’objectif de cette étude est de comparer leur photoréactivité et d’évaluer l’influence de différents paramètres tels que la concentration initiale en pesticide, la concentration en catalyseur et le flux photonique sur la cinétique de dégradation du monolinuron. L’étude comparative de la dégradation des deux herbicides a montré que les deux composés présentent une réactivité comparable avec le système TiO2/lumière simulée. Dans les conditions opératoires de cette étude, la dégradation photocatalytique du LN et du MLN suit une cinétique de pseudo ordre 1. La pseudo-constante kobs est inversement proportionnelle à la concentration initiale en pesticide et peut être décrite par une équation de Langmuir-Hinshelwood. L’étude de l’influence de la concentration en TiO2 a permis de montrer que la cinétique de dégradation du MLN augmente avec la dose de catalyseur, mais un surdosage n’est pas nécessaire pour augmenter l’efficacité du procédé. Cette étude a permis également de montrer que la pseudo‑constante d’ordre 1 de dégradation du MLN augmente linéairement avec le flux lumineux jusqu’à 580 W m-2 puis décroît. Dans ces conditions, la recombinaison des électrons trous est favorisée. Enfin, la cinétique de dégradation du MLN en fonction du pH passe par un optimum de pH proche du pH de point de charge nulle (pH = 6)

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Photochemistry of Phenols

Horspool

2009

Patai's Chemistry of Functional Groups

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Introduction General Observations Hydrogen Transfer Reactions Chalcones Quinonemethides from Phenol Derivatives Cyclizations within o ‐Allylphenols Rearrangements Carbene Formation Cycloadditions Miscellaneous Additions and Eliminations Hydroxycarboxylic Acids Oxidations

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Heterogeneous photocatalyzed oxidation of creosote components: mineralization of xylenols by illuminated TiO2 in oxygenated aqueous media

Cited by 97 publications

References 15 publications

A Kinetic Study on Photocatalytic and Sonophotocatalytic Degradation of Textile Dyes

A Kinetic Study on Photocatalytic and Sonophotocatalytic Degradation of Textile Dyes

Photocatalytic Degradation of Monolinuron and Linuron in an Aqueous Suspension of Titanium Dioxide Under Simulated Solar Irradiation

Photochemistry of Phenols

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