Photocatalytic effect of carbon-modified n-TiO2 nanoparticles under visible light illumination

Xu, Changhao; Killmeyer, R.P.; Gray, McMahan L.; Khan, Shahed U. M.

doi:10.1016/j.apcatb.2005.11.008

Cited by 179 publications

(126 citation statements)

References 21 publications

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“…The experimental results showed that up to 70% of NO x could be oxidized in a continuous flow type reaction system under irradiation with visible light. Other researchers modified TiO 2 by calcinations of hydrolysis product from Ti precursors and heat treatment with urea and thiourea (36)(37)(38) or tetrabutylammonium hydroxide (39)(40)(41)(42). These studies showed that carbon addition to TiO 2 lowered the band gap and make them active under irradiation with visible light.…”

Section: Introductionmentioning

confidence: 99%

The Photocatalytic Performance of Benzene- Modified TiO2 Photocatalysts under UV-vis Light Irradiation

Kusiak-Nejman¹,

Wanag²,

Kowalczyk³

et al. 2015

Journal of Advanced Oxidation Technologies

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Abstract:In this study a photocatalytic performance of new carbon-modified titanium dioxide photocatalysts was discussed. Benzene was used as carbon precursor. It was found that the photocatalytic activity of obtained samples increases with the increase of modification temperature and decrease of carbon concentration present in TiO 2 /C samples. This could be related to the kind of interactions between TiO 2 surface and carbon from thermal decomposition of benzene. The higher calcination temperature the less carbon deposits on the surface of modified samples and the higher probability of the Ti and C interaction confirmed by means of UV-vis/DR studies. It was proved that the photocatalytic activity of carbon modified titania nanomaterials strongly depends on carbon content in TiO 2 /C photocatalysts. Modification of starting TiO 2 with benzene is a promising method especially by taking into account the mineralization of phenol and the co-products of its degradation.

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Section: Introductionmentioning

confidence: 99%

The Photocatalytic Performance of Benzene- Modified TiO2 Photocatalysts under UV-vis Light Irradiation

Kusiak-Nejman¹,

Wanag²,

Kowalczyk³

et al. 2015

Journal of Advanced Oxidation Technologies

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show abstract

“…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%

“…Sakthivel and Kisch (2003) observed a fivefold increase in photocatalytic activity of carbon-doped n-TiO 2 as compared to nitrogen-doped n-TiO 2 . Xu et al (2006) reported that the carbon-modified n-TiO 2 nanoparticles, synthesized by a wet process using a glucose (C 6 H 12 O 6 ) solution as the carbon source, showed a significantly enhanced photocatalytic activity as compared to regular undoped n-TiO 2.…”

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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“…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%

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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Photocatalytic effect of carbon-modified n-TiO2 nanoparticles under visible light illumination

Cited by 179 publications

References 21 publications

The Photocatalytic Performance of Benzene- Modified TiO2 Photocatalysts under UV-vis Light Irradiation

The Photocatalytic Performance of Benzene- Modified TiO2 Photocatalysts under UV-vis Light Irradiation

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

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

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