Photocatalytic degradation of dibenzothiophene using La/PEG-modified TiO2 under visible light irradiation

Moradi, Shapour; Vossoughi, Manouchehr; Feilizadeh, Mehrzad; Zakeri, S. Mohammad Esmaeil; Mohammadi, Mohammad Moein; Rashtchian, Davood; Booshehri, Amin Yoosefi

doi:10.1007/s11164-013-1519-z

Cited by 40 publications

(16 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several scientific studies on the modification and development of TiO 2 catalyst in order to increase its visible light sensitivity have been reported over the past decades . Doping TiO 2 with metals and non‐metals (such as silver and sulphur respectively) has been known as an efficient strategy to extend its optical response from UV to visible light range .…”

Section: Introductionmentioning

confidence: 99%

Individual and interaction effects of operating parameters on the photocatalytic degradation under visible light illumination: Response surface methodological approach

et al. 2017

Self Cite

View full text Add to dashboard Cite

In this study, for the first time a statistical analysis based on the response surface methodology (RSM) was employed to investigate individual and interaction effects of key operating parameters of the photocatalytic degradation under visible-light irradiation using Ag-S/PEG/TiO 2 . Ag-S/PEG/ TiO 2 is a visible-light-driven photocatalyst and was synthesized (based on earlier research) by co-doping of TiO 2 with silver and sulphur and addition of polyethylene glycol (as a reagent template). In addition, the model pollutant was methylene orange (MO) and the studied operating parameters included the photocatalyst loading, initial concentration of the pollutant, and pH of the solution. The statistics-based experimental design and RSM was utilized to find a quadratic model as a functional relationship between the degradation efficiency and the three operating parameters. The regression analysis with R 2 value of 0.9678 showed a close fit between the model prediction and experimental data of the degradation efficiency. The analysis of variance based on the model indicated that pH of the solution was the most influential factor, while the two other operating parameters were also significant. The efficiency of MO degradation reached 94.0 % under the optimum conditions (i.e. photocatalyst loading of 1.20 g/L, MO concentration of 5 mg/L, and pH of 2).

show abstract

Section: Introductionmentioning

confidence: 99%

Individual and interaction effects of operating parameters on the photocatalytic degradation under visible light illumination: Response surface methodological approach

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…XRD patterns of the prepared Pt/TiO 2 as well as pristine TiO 2 are presented in Figure S2. The average Anatase (101) and Rutile (110) crystal sizes of both of the samples were estimated to be around 20 and 30 nm, respectively, using the Scherrer equation . By considering the peak heights of Anatase (101) and Rutile (110) reflections, it was revealed that around 15% of each sample is composed of Rutile crystals.…”

Section: Resultsmentioning

confidence: 99%

An intrinsic kinetic model for liquid‐phase photocatalytic hydrogen production

2019

Self Cite

View full text Add to dashboard Cite

A kinetic study was accomplished to describe the photocatalytic production of hydrogen in liquid phase. A reaction mechanism and a kinetic model were proposed to predict the rate of hydrogen production, which is a function of light intensity, catalyst loading, substrate concentration, and time. To assess the capability of the proposed model, glycerol and ethanol were selected as representative hydrogen sources (substrates). The experimental data performed under different operating conditions, based on Box-Behnken experimental design, were used to train the developed kinetic model, optimize the parameters using genetic algorithms and check its accuracy. The analysis confirms the validity of the model under different operating conditions. In addition, the ability of the model to predict the rate of hydrogen production for other substrates, photocatalysts, and operating conditions was confirmed by comparing model predictions with experimental data from literature.

show abstract

“…Among all various alternative energy resources, solar energy is one of the potentially powerful sources to provide for energy demands in the future . Due to the critical need to develop sustainable water treatment technologies for the decontamination of hazardous pollutants, solar photocatalysis using titanium dioxide (TiO 2 )‐based semiconductors has attracted much attention in the recent years . The photo‐excitation of TiO 2 occurs only in a limited range of wavelength of the solar spectrum (usually λ < 385 nm) .…”

Section: Introductionmentioning

confidence: 99%

Hydrogen peroxide‐assisted photocatalysis under solar light irradiation: Interpretation of interaction effects between an active photocatalyst and H₂O₂

2019

Self Cite

View full text Add to dashboard Cite

In this work, the combination of H 2 O 2 and an active visible-light-driven photocatalyst (Ag-S/PEG/TiO 2 ) was utilized under natural solar radiation for the degradation of 2-nitrophenol (2-NP), and interaction effects between the photocatalyst and hydrogen peroxide were analyzed. For this purpose, experiments were designed using the response surface methodology based on the central composite design. The resulting data was utilized to obtain a model for the prediction of response (the degradation efficiency) as a function of two independent factors (H 2 O 2 concentration and the photocatalyst loading). The statistical analysis indicated that optimum values of each of the two independent factors decreased by increasing the other one and vice versa. Moreover, it was found that adding the optimal amount of H 2 O 2 to the solution, which contained just the photocatalyst, can enhance the degradation significantly (up to 45 %). However, using higher concentrations of H 2 O 2 may decrease the efficiency. The global optimum condition was found to be 545 ppm and 316 mM for Ag-S/PEG/TiO 2 loading and H 2 O 2 concentration, respectively. In this condition, the degradation efficiency of 2-NP reached 92.4 % after only 45 min of solar light irradiation.

show abstract

Photocatalytic degradation of dibenzothiophene using La/PEG-modified TiO2 under visible light irradiation

Cited by 40 publications

References 42 publications

Individual and interaction effects of operating parameters on the photocatalytic degradation under visible light illumination: Response surface methodological approach

Individual and interaction effects of operating parameters on the photocatalytic degradation under visible light illumination: Response surface methodological approach

An intrinsic kinetic model for liquid‐phase photocatalytic hydrogen production

Hydrogen peroxide‐assisted photocatalysis under solar light irradiation: Interpretation of interaction effects between an active photocatalyst and H₂O₂

Contact Info

Product

Resources

About

Photocatalytic degradation of dibenzothiophene using La/PEG-modified TiO2 under visible light irradiation

Cited by 40 publications

References 42 publications

Individual and interaction effects of operating parameters on the photocatalytic degradation under visible light illumination: Response surface methodological approach

Individual and interaction effects of operating parameters on the photocatalytic degradation under visible light illumination: Response surface methodological approach

An intrinsic kinetic model for liquid‐phase photocatalytic hydrogen production

Hydrogen peroxide‐assisted photocatalysis under solar light irradiation: Interpretation of interaction effects between an active photocatalyst and H2O2

Contact Info

Product

Resources

About

Hydrogen peroxide‐assisted photocatalysis under solar light irradiation: Interpretation of interaction effects between an active photocatalyst and H₂O₂