In-situ generated H2O2 induced efficient visible light photo-electrochemical catalytic oxidation of PCP-Na with TiO2

Liu, Wei; Liu, Huichao; Ai, Zhihui

doi:10.1016/j.jhazmat.2015.02.024

Cited by 22 publications

(5 citation statements)

References 42 publications

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“…Different methods such as adsorption [4,6,7], biodegradation [8][9][10], oxidation [2,11,12] photocatalytic degradation [13,14], and electrochemical methods [15][16][17] have been used to remove PCP from the aquatic solutions.…”

Section: Introductionmentioning

confidence: 99%

Performance of photocatalytic ozonation process for pentachlorophenol (PCP) removal in aqueous solution using graphene-TiO2 nanocomposite (UV/G-TiO2/O3)

Zazouli

Yousefi

Ghanbari³

et al. 2020

J Environ Health Sci Engineer

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The aim of this study was to evaluate the efficiency of photocatalytic ozonation process using graphene-dioxide titanium nanocomposite in removing Pentachlorophenol (PCP) from aqueous solutions. In this study, nanocomposites with graphene to TiO 2 (G/T) ratios of 1:10 and 1:20 were synthesized by hydrothermal method, and its characteristics were assessed using various analyses, SEM, XRD, FTIR, TEM, BET and TGA. In this process, the effects of parameters including O 3 concentration (0.25-1.25 mg/L), nanocomposite concentration (50-500 mg/L), initial PCP concentration (10-100 mg/L), and time (10-60 min), were studied. The results showed that PCP removal efficiency was increased by decreasing solute concentration. Increasing nanocomposite dose to 100 mg/L was led to an increase in efficiency (99.1%), but then a decreasing trend was observed. Increasing the concentration of ozone, up to specific value, also enhanced the efficiency but then had a negative effect on process efficiency. Furthermore, the optimum ratio of the catalyst was determined to be 1:20. The highest efficiency of the process for initial pentachlorophenol concentration of 100 mg/L was obtained 98.82% in optimum conditions (catalyst dose of 100 mg/L and 60 min). It is concluded that the photocatalytic ozonation process using graphene-dioxide titanium nanocomposite had the highest efficiency in removal and mineralization of PCP.

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Section: Introductionmentioning

confidence: 99%

Performance of photocatalytic ozonation process for pentachlorophenol (PCP) removal in aqueous solution using graphene-TiO2 nanocomposite (UV/G-TiO2/O3)

Zazouli

Yousefi

Ghanbari³

et al. 2020

J Environ Health Sci Engineer

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“…In recent years, the advanced oxidation processes (AOPs) were widely used for the wastewater treatment . Among the AOPs, anodic oxidation with electrogenerated H 2 O 2 (AO-H 2 O 2 ), the electro-Fenton (EF), and photoelectro-Fenton (PEF) are promising methods because they are environmentally friendly and could generate hydroxyl radicals to oxidize pollutants. − In the EF process, hydroxyl radicals generated from the Fenton’s reagent (Fe 2+ and H 2 O 2 ) at the cathode are given as follows …”

Section: Introductionmentioning

confidence: 99%

“…When TiO 2 is irradiated with light photons (λ < 390 nm), an electron from the filled valence band is excited to the empty conduction band (e CB – ) with an energy gap of 3.2 eV, generating a positively charged vacancy or hole (h VB + ) by reaction . The holes generated at the TiO 2 surface could oxidize water to produce • OH from reactions and , which can destroy the organics. ,, …”

Section: Introductionmentioning

confidence: 99%

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Treatment of Polyaniline Wastewater by Coupling of Photoelectro-Fenton and Heterogeneous Photocatalysis with Black TiO₂ Nanotubes

Wang

et al. 2019

ACS Omega

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In this study, mineralization of organic pollutants in polyaniline (PANI) wastewater was achieved by a combination of photoelectro-Fenton (PEF) and heterogeneous photocatalysis with black TiO 2 nanotubes. Organics were decomposed by the • OH radicals and SO 4 −• radicals formed on the black TiO 2 nanotube photocatalyst and at the IrO 2 /Ti anode during water oxidation and from the Fenton's reaction between Fe 2+ and generated H 2 O 2 . Poor chemical oxygen demand (COD) removal was obtained utilizing visible light/TiO 2 , anodic oxidation with generated H 2 O 2 (AO-H 2 O 2 ), visible light/ black TiO 2 /AO-H 2 O 2 , and electro-Fenton. The mineralization was strongly increased by the PEF/black TiO 2 process because of the photolysis of products under visible light irradiation; it was improved by coupled heterogeneous photocatalysis due to the additional • OH radicals at the black TiO 2 nanotube surface. The results demonstrated that about 96.4% COD and 85% total organic carbon of PANI wastewater were removed after 360 min by the PEF/black TiO 2 process under the optimal conditions. The black TiO 2 nanotubes exhibited good stability as the mineralization ratio in 360 min which was still above 80% after 10 cycles' degradation, showing that the black TiO 2 nanotubes are powerful and promising photocatalysts for improving the removal efficiency of PANI wastewater.

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“…12 Consequently, tremendous research efforts have been devoted to the development of photocatalysts and electrochemical methods for the in situ generation of H 2 O 2 through the cathodic reduction of dissolved oxygen. [13][14][15][16][17] Moreover, bio-electrochemistry has also been applied for the in situ generation of H 2 O 2 though bioreactions. 18,19 However, the specic operating conditions, such as high electrolyte concentrations, electrical energy, luminous energy, nutrients or elevated voltage hindered the practical applications of these systems.…”

Section: Introductionmentioning

confidence: 99%

Efficient in situ generation of H₂O₂ by novel magnesium–carbon nanotube composites

et al. 2018

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In-situ generated H2O2 induced efficient visible light photo-electrochemical catalytic oxidation of PCP-Na with TiO2

Cited by 22 publications

References 42 publications

Performance of photocatalytic ozonation process for pentachlorophenol (PCP) removal in aqueous solution using graphene-TiO2 nanocomposite (UV/G-TiO2/O3)

Performance of photocatalytic ozonation process for pentachlorophenol (PCP) removal in aqueous solution using graphene-TiO2 nanocomposite (UV/G-TiO2/O3)

Treatment of Polyaniline Wastewater by Coupling of Photoelectro-Fenton and Heterogeneous Photocatalysis with Black TiO₂ Nanotubes

Efficient in situ generation of H₂O₂ by novel magnesium–carbon nanotube composites

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In-situ generated H2O2 induced efficient visible light photo-electrochemical catalytic oxidation of PCP-Na with TiO2

Cited by 22 publications

References 42 publications

Performance of photocatalytic ozonation process for pentachlorophenol (PCP) removal in aqueous solution using graphene-TiO2 nanocomposite (UV/G-TiO2/O3)

Performance of photocatalytic ozonation process for pentachlorophenol (PCP) removal in aqueous solution using graphene-TiO2 nanocomposite (UV/G-TiO2/O3)

Treatment of Polyaniline Wastewater by Coupling of Photoelectro-Fenton and Heterogeneous Photocatalysis with Black TiO2 Nanotubes

Efficient in situ generation of H2O2 by novel magnesium–carbon nanotube composites

Contact Info

Product

Resources

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Treatment of Polyaniline Wastewater by Coupling of Photoelectro-Fenton and Heterogeneous Photocatalysis with Black TiO₂ Nanotubes

Efficient in situ generation of H₂O₂ by novel magnesium–carbon nanotube composites