Photocatalytic degradation using design of experiments: A review and example of the Congo red degradation

Sakkas, Vasilios A.; Islam, Md. Azharul; Stalikas, Constantine D.; Albanis, Triantafyllos A.

doi:10.1016/j.jhazmat.2009.10.050

Cited by 323 publications

(172 citation statements)

References 63 publications

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“…From the results, it can be seen that the dye effluent was completely removed at concentration of 20 and 40 mg L of TiO 2 (pH 7, Irradiation time of 100 min). The same behaviour was observed for irradiation time and for pH, acidic and basic range showed adverse effect on removal [35][36][37][38][39][40].…”

Section: Effect Of Dye Concentration On Removal Efficiencysupporting

confidence: 76%

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Box behnken design based optimization of solar induced photo catalytic decolourization of textile dye effluent

Senthilkumar¹,

Perumalsamy

Prabhu

et al. 2012

Open Engineering

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Box-Behnken design was employed for the decolourization of synthetic dye bath effluent using solar induced photo catalytic degradation with mixed semi conductor catalysts. Four independent variables namely concentration of dye effluent, catalyst loading, pH and irradiation time was chosen as process variables. The optimum concentrations of dye effluent, catalyst dosage, pH, and irradiation time were found to be 60 mg L −1 , 200 mg L −1 , 7 and 100 min, respectively, for maximum decolourization of dye effluent (91.24%). Predicted values were found to be in good agreement with experimental values and as a result reflected the precision and the applicability of Response Surface Methodology (RSM) (R 2 =0.9785 and Adj R 2 = 0.9569).

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Section: Effect Of Dye Concentration On Removal Efficiencysupporting

confidence: 76%

“…It shows that predicted and experimental results were in good agreement as evidenced by the points distributed closely to the diagonal line (Fig. 2) [35,36,[38][39][40].…”

Section: Adequacy Of the Regression Modelsupporting

confidence: 63%

Box behnken design based optimization of solar induced photo catalytic decolourization of textile dye effluent

Senthilkumar¹,

Perumalsamy

Prabhu

et al. 2012

Open Engineering

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“…According to the forecasts done, verification experiments were conducted under optimum The similarity between the predicted and experimental results verified the validity of the model and existence of an optimal point. This confirms that the RSM was a powerful tool for determining the exact optimal values of the individual factors [31,32].…”

Section: Optimum Condition and Verificationsupporting

confidence: 71%

Preparation and characterization of nano-spherical CoFe2O4 supported on copper slag as a catalyst for photocatalytic degradation of 2-nitrophenol in water

Zeynolabedin

Mahanpoor

2017

J Nanostruct Chem

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In this research, new catalyst prepared by supporting CoFe 2 O 4 on copper slag (CS) and characterization of this catalyst was done with using scanning electron microscopy image, energy-dispersive X-ray spectroscopy, BET surface area, and X-ray diffraction patterns. UV ? H 2 O 2 processes by CoFe 2 O 4 /CS as a photocatalyst was used for degradation of 2-nitrophenol (2NP) as a pollutant in water. Response surface methodology in the Basis of a three-variable Box-Behnken design was applied to determine the effect of pH values (4, 7 and 10), concentration of 2-nitrophenol (10, 20 and 30 ppm), and concentration of H 2 O 2 (30, 60 and 90 ppm) on the levels of response and optimized these operational parameters. The optimal conditions were determined as pH = 10, concentration of 2-nitrophenol = 10 ppm, and concentration of H 2 O 2 = 90 ppm. Degradation efficiency in optimal condition was 96.55%.

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“…pairs participates in chemical conversion reactions, whereas the other part undergoes recombination (Fujishima et al, 2007;Sakkas et al, 2010). This makes define two regimes as regards to the effect of light intensity on PDEs: 1) a first-order regime in which electronhole pairs are consumed more rapidly by chemical reactions than by recombination, that is, at low light intensity and high input concentration, and 2) a half-order regime in which recombination is the most dominant process, that is, at high light intensity and low input concentration.…”

Section: Photocatalytic Activity Dependence On Light Intensitymentioning

confidence: 99%

Application of Light-emitting-diodes to Annular-type Photocatalytic Reactor for Removal of Indoor-level Benzene and Toluene

Jo¹,

Kang²,

Kim³

2012

Journal of Environmental Science International

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Unlike water applications, the photocatalytic technique utilizing light-emitting-diodes as an alternative light source to conventional lamp has rarely been applied for low-level indoor air purification. Accordingly, this study investigated the applicability of UV-LED to annular-type photocatalytic reactor for removal of indoor-level benzene and toluene at a low concentration range associated with indoor air quality issues. The characteristics of photocatalyst was determined using an X-ray diffraction meter and a scanning electron microscope. The photocatalyst baked at 350 o C exhibited the highest photocatalytic degradation efficiencies(PDEs) for both benzene and toluene, and the photocatalysts baked at three higher temperatures(450, 550, and 650 o C) did similar PDEs for these compounds. The average PDEs over a 3-h period were 81% for benzene and close to 100% for toluene regarding the photocatalyst baked at 350 o C, whereas they were 61 and 74% for benzene and toluene, respectively, regarding the photocatalyst baked at 650 o C. As the light intensity increased from 2.4 to 3.5 MW cm -1 , the average PDE increased from 36 to 81% and from 44% to close to 100% for benzene and toluene, respectively. In addition, as the flow rate increased from 0.1 to 0.5 L min -1 , the average PDE decreased from 81% to close to zero and from close to 100% to 7% for benzene and toluene, respectively. It was found that the annular-type photocatalytic reactor inner-inserted with UV-LEDs can effectively be applied for the decomposition of low-level benzene and toluene under the operational conditions used in this study.

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Photocatalytic degradation using design of experiments: A review and example of the Congo red degradation

Cited by 323 publications

References 63 publications

Box behnken design based optimization of solar induced photo catalytic decolourization of textile dye effluent

Box behnken design based optimization of solar induced photo catalytic decolourization of textile dye effluent

Preparation and characterization of nano-spherical CoFe2O4 supported on copper slag as a catalyst for photocatalytic degradation of 2-nitrophenol in water

Application of Light-emitting-diodes to Annular-type Photocatalytic Reactor for Removal of Indoor-level Benzene and Toluene

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