Photocatalytic degradation of phenol in natural seawater using visible light active carbon modified (CM)-n-TiO2 nanoparticles under UV light and natural sunlight illuminations

Shaban, Yasser A.; Sayed, Mohamed A. El; Maradny, Amr A. El; Farawati, Radwan Kh. Al; Zobidi, Mousa

doi:10.1016/j.chemosphere.2012.11.035

Cited by 113 publications

(41 citation statements)

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“…After the same irradiation time, only 49.25% of the same concentration of Cr was removed using regular n-TiO 2 under the same experimental conditions. The observed enhanced photocatalytic activity of carbon modified CM-n-TiO 2 nanoparticles, can be attributed to carbon modification of TiO 2 during the synthesis process [21,22,[24][25][26].…”

Section: Photocatalytic Experimentsmentioning

confidence: 91%

“…Semiconductor photocatalysis has attracted considerable interest as an effective and economical technique for detoxification of polluted waters [13][14][15][16][17][18][19][20][21][22]. It can effectively reduce highly toxic Cr(VI) into the less harmful Cr(III), which can then be precipitated as Cr(OH) 3 in neutral or alkaline solutions [23].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, much attention has been devoted to enhancing its catalytic efficiency or expanding its applicability under solar irradiation. Recently, carbon modification of n-TiO 2 has been proved to be an effective approach to enhance its catalytic efficiency [21,22,[24][25][26].…”

Section: Introductionmentioning

confidence: 99%

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Effective Photocatalytic Reduction of Cr(VI) by Carbon Modified (CM)-n-TiO2 Nanoparticles under Solar Irradiation

Shaban¹

2013

WJNSE

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Photocatalytic reduction of toxic Cr(VI) was successfully achieved using carbon modified titanium oxide (CM-n-TiO 2 ) nanoparticles under natural sunlight illumination. Modification of titanium oxide by carbon significantly enhanced the photocatalytic reduction of Cr(VI) under natural sunlight irradiation. The effects of various experimental parameters such as catalyst dose, initial concentration of Cr(VI), and solution pH on the reduction rate of Cr(VI) were investigated. The highest reduction rate of Cr(VI) was obtained at the optimal conditions of pH 5 and 2.0 g·L −1 of CM-n-TiO 2 . Interestingly, in the presence of phenol, as a sacrificial electron donor, the rate of Cr(VI) reduction was nearly 1.7 times higher than in its absence. The solar photoreduction of Cr(VI) in aqueous solution using CM-n-TiO 2 obeyed a pseudo-first order kinetics according to the Langmuir-Hinshelwood model.

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Section: Photocatalytic Experimentsmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

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Effective Photocatalytic Reduction of Cr(VI) by Carbon Modified (CM)-n-TiO2 Nanoparticles under Solar Irradiation

Shaban¹

2013

WJNSE

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“…The Langmuir-Hinshelwood model is used to describe the kinetics of AOPs of organics in aqueous solutions (Shaban et al 2013). It basically relates the degradation rate (r) and reactant concentration (C) in water at time t, which is expressed by the following equation (Kartal et al 2001):…”

Section: Degradation Kineticsmentioning

confidence: 99%

Investigation of optimum conditions and costs estimation for degradation of phenol by solar photo-Fenton process

Alalm

Tawfik

2014

Appl Water Sci

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In this study, solar photo-Fenton reaction using compound parabolic collectors reactor was assessed for removal of phenol from aqueous solution. The effect of irradiation time, initial concentration, initial pH, and dosage of Fenton reagent were investigated. H 2 O 2 and aromatic intermediates (catechol, benzoquinone, and hydroquinone) were quantified during the reaction to study the pathways of the oxidation process. Complete degradation of phenol was achieved after 45 min of irradiation when the initial concentration was 100 mg/L. However, increasing the initial concentration up to 500 mg/L inhibited the degradation efficiency. The dosage of H 2 O 2 and Fe ?2 significantly affected the degradation efficiency of phenol. The observed optimum pH for the reaction was 3.1. Phenol degradation at different concentration was fitted to the pseudo-first order kinetic according to Langmuir-Hinshelwood model. Costs estimation for a large scale reactor based was performed. The total costs of the best economic condition with maximum degradation of phenol are 2.54 €/ m 3 .

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“…Over the past several years, heterogeneous semiconductor photocatalysis using titanium dioxide has received considerable attention for its application in water splitting to produce hydrogen (Fujishima & Honda, 1972;Khan, Al-Shahry, & Ingler, 2002;Shaban & Khan, 2010;Shaban, 2013), and degradation of organic pollutants (Xu, Killmeyer, Gray, & Khan, 2006;Shaban, El Sayed, El Maradny, Al Farawati, & Al Zobidi, 2013;Shaban, 2013). However, its utilization is limited to the UV region due to its wide band gap (3.0-3.2 eV).…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Removal of Methylene Blue From Seawater Under Natural Sunlight Using Carbon-Modified n-TiO2 Nanoparticles

Shaban¹

2013

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In this study, photocatalytic removal of methylene blue (MB) from natural seawater was examined using carbon-modified titanium oxide (CM-n-TiO 2 ) nanoparticles under illumination of real sunlight. CM-n-TiO 2 nanoparticles exhibited significantly higher photocatalytic degradation efficiency compared to unmodified n-TiO 2 . Photocatalytic removal studies were carried out at different initial dye concentrations (5-30 µM), catalyst dose (0.5-1.5 gL -1 ), and pH (3-9). The highest removal rate of MB was obtained at the optimal conditions of pH 8 and 1.0 gL -1 of CM-n-TiO 2 . The solar photocatalytic removal of MB from seawater using CM-n-TiO 2 obeyed a pseudo-first order kinetics according to the Langmuir-Hinshelwood model.

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Photocatalytic degradation of phenol in natural seawater using visible light active carbon modified (CM)-n-TiO2 nanoparticles under UV light and natural sunlight illuminations

Cited by 113 publications

References 50 publications

Effective Photocatalytic Reduction of Cr(VI) by Carbon Modified (CM)-n-TiO2 Nanoparticles under Solar Irradiation

Effective Photocatalytic Reduction of Cr(VI) by Carbon Modified (CM)-n-TiO2 Nanoparticles under Solar Irradiation

Investigation of optimum conditions and costs estimation for degradation of phenol by solar photo-Fenton process

Enhanced Photocatalytic Removal of Methylene Blue From Seawater Under Natural Sunlight Using Carbon-Modified n-TiO2 Nanoparticles

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