Kinetic study and modeling on photocatalytic degradation of para-chlorobenzoate at different light intensities

Meng, Yaobin; Huang, Xia; Wu, Yanxue; Wang, Xiaomao; Qian, Yi

doi:10.1016/s0269-7491(01)00184-1

Cited by 59 publications

(29 citation statements)

References 15 publications

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“…Moreover, as the rate of OH • generation increased, the reaction between OH • became faster; even faster than the rate of oxidation of the organic pollutants by OH • . As a result, the OH • were quenched by themselves and not available to oxidize the organic pollutants [33,[35][36][37][38].…”

Section: Effect Of H 2 O 2 Concentrationmentioning

confidence: 99%

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Optimization of photocatalytic oxidation of 2,2$prime;,3,3$prime;-tetrachlorobiphenyl

Wong

2004

Journal of Hazardous Materials

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Section: Effect Of H 2 O 2 Concentrationmentioning

confidence: 99%

“…•− ) [32,38]. Increasing the concentration of TiO 2 can enhance the production of these ROSs and lead to the greater removal of target organics.…”

Section: Effect Of Titanium Dioxide Concentrationmentioning

confidence: 99%

Optimization of photocatalytic oxidation of 2,2$prime;,3,3$prime;-tetrachlorobiphenyl

Wong

2004

Journal of Hazardous Materials

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“…He proposed that there is a competition between the chemical pathway of decay of the activate surface centers through interactions with reactant molecules and the physical pathway of decay of the active surface centers through recombination which contributes to the dependence of k r and K s on the light intensity. Meng [12] plotted the variation of k r and K s with five different intensities, finding correlations for k r and K s of the forms below: k r varied as I 0.5 , and 1/K s varied as m ? nI 0.5 , again in agreement with Ollis's argument mentioned above.…”

Section: A New Kinetic Modelmentioning

confidence: 99%

Photocatalytic degradation of dimethyl phthalate in aqueous TiO2 suspension: a modified Langmuir–Hinshelwood model

Zhang

Zheng

2009

React Kinet Catal Lett

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A modified Langmuir-Hinshelwood model based on intrinsic reactions was proposed. Similar to the Langmuir-Hinshelwood model, the modified model predicts that both the reciprocal of reaction rate constant 1/k r and the adsorption rate constant K s are linearly proportional to the reciprocal of the square root of light intensity 1/I 1/2 . The validity of the modified kinetic model was verified with the experimental data of dimethyl phthalate (DMP) degradation.Keywords Photocatalysis Á Langmuir-Hinshelwood Á Kinetic model InstructionLangmuir-Hinshelwood (L-H) kinetics is the most commonly used expression to explain the kinetics of the heterogeneous photocatalytic process [1]. It is given by:where r represents is the rate of reaction, k r is the apparent reaction rate constant, K s is the adsorption rate constant and C is the substrate concentration [2]. While widely cited in photocatalysis, flaws have been found with this model. Hoffmann found the L-H parameters k r and K s had a negative correlation [3], but the simple L-H kinetic model couldn't explain this. Several research groups observed that k r and 1/K s varied with light intensity to the same exponent, which may be 1.0 (very low intensity) or 0.5 (high intensity) [3,4]. As a parameter reflecting adsorptive affinity of a substrate on TiO 2 surface, K s should not vary with

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“…The photocatalytic degradation of methanol can be assumed to follow the Langmuir-Hinshelwood's model (Kim and Hong, 2002;Meng et al, 2002). Eq.…”

Section: Photocatalytic Activitymentioning

confidence: 99%

Influence of the geometry of a monolithic support on the efficiency of photocatalyst for air cleaning

Furman

Corbel

Gall

et al. 2007

Chemical Engineering Science

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Kinetic study and modeling on photocatalytic degradation of para-chlorobenzoate at different light intensities

Cited by 59 publications

References 15 publications

Optimization of photocatalytic oxidation of 2,2$prime;,3,3$prime;-tetrachlorobiphenyl

Optimization of photocatalytic oxidation of 2,2$prime;,3,3$prime;-tetrachlorobiphenyl

Photocatalytic degradation of dimethyl phthalate in aqueous TiO2 suspension: a modified Langmuir–Hinshelwood model

Influence of the geometry of a monolithic support on the efficiency of photocatalyst for air cleaning

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