Visible light induced photodegradation of organic pollutants on dye adsorbed TiO2 surface

Chatterjee, Debabrata; Mahata, Anima

doi:10.1016/s1010-6030(02)00291-5

Cited by 163 publications

(87 citation statements)

References 31 publications

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“…It showed that little phenol was decomposed with pure TiO 2 under visible light, while with PFB/TiO 2 nearly 75% of the phenol was removed. It is suggested that PFB is an effective photosensitizer, as has been reported for some dyes [9][10][11]. Kinetically, the degradation reaction showed the firs-order behavior.…”

Section: Photocatalytic Removal Of Phenolsupporting

confidence: 53%

“…Recently many studies have been devoted to improving photocatalytic activity under the visible light by surface modifying TiO 2 using dyes. Great success was achieved in the field of dye-sensitized solar cell [7,8] as well as the dye-sensitized TiO 2 for photocatalytic degradation of the organic pollutions [9][10][11]. Three basic processes are involved in the dye sensitizing semiconductor.…”

Section: Introductionmentioning

confidence: 99%

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Photocatalytic Activities of TiO2 Modified by Poly(fluorene- co-bithiophene) under Visible Light

Song¹,

Zeng²,

Zhang³

2011

Energy Procedia

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Abstract-Photocatalytic removal of phenol was studied using the photocatalyst poly(fluorine-co-bithiophene) (PFB)/TiO 2 under visible light. After two hours irradiation with a three watts GaN LEDs (light emitting diode) cluster, about 75% removal of phenol. the degradation reaction showed the firsorder behavior and the reaction rate constants (k) of PFB/TiO 2 was calculated to be 0.0169 min -1 . Diffuse reflectance spectra showed that the absorbance range of PFB/TiO 2 was expanded from 387 nm (TiO 2 ) to above 500 nm. Photoluminescent spectra and photoluminescent quantum efficiency indicated that electrons were transferred from PFB to the conduction band of TiO 2 . The surface modification using PFB did not decrease the photocatalytic activity of TiO 2 under the UV light irradiation.

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Section: Photocatalytic Removal Of Phenolsupporting

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Photocatalytic Activities of TiO2 Modified by Poly(fluorene- co-bithiophene) under Visible Light

Song¹,

Zeng²,

Zhang³

2011

Energy Procedia

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“…Several strategies and methods for modifying the optical properties of TiO 2 particles, e.g., doping of a transition metal [3,4], plasma treatments [5] and nitrogen doping [6,7], have been proposed, and photoactivity under visible-light irradiation has been proved in some limited reactions. Much interest has also been shown in surface modification of TiO 2 with transition metal complexes and/or organic dyes for construction of dye-sensitized photocatalytic systems that work under visible-light irradiation [8,9] as well as for improvement of the efficiency of dye-sensitized solar cells [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Photochemical hydrogen evolution from aqueous triethanolamine solutions sensitized by binaphthol-modified titanium(IV) oxide under visible-light irradiation

Ikeda

Abe

Torimoto

et al. 2003

Journal of Photochemistry and Photobiology A: Chemistry

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Surface modification of titanium(IV) oxide (TiO 2 ) powders with 1,1'-binaphthalene-2,2'-diol (bn(OH) 2 ), having two phenolic hydroxyls and atropisomeric chirality, in refluxed ethanol led to the formation of a deep yellow-colored surface complex, giving visible-light absorption at a wavelength below ca. 550-600 nm.Quantitative analyses of the surface complex revealed that absorption intensity at 450 nm in diffuse reflection measurement was almost proportional to its amount and that its amount depended strongly on the amount of surface hydroxyl groups of TiO 2 but not on the crystal structure of TiO 2 , anatase and rutile. The bn(OH) 2 complexation was also applied to platinized TiO 2 to drive photocatalytic molecular hydrogen (H 2 ) evolution from 1 deaerated triethanolamine solutions under visible-light irradiation at a wavelength even longer than 540 nm. The photonic efficiency of the photocatalytic reaction at 450 nm was estimated to be 0.02% for bn(OH) 2 -modified TiO 2 (JRC-TIO-3) loaded with 0.1 wt% of platinum. On the basis of these experimental results, the reaction mechanism, which involves visible-light excitation of the surface complex, injection of electrons from the complex to TiO 2 , and migration of the electrons to platinum deposits, where reduction of H + takes place to give H 2 , was elucidated.

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“…Dye molecules adsorbed on the surface extend the range of excitation energies of the semiconductor into visible region. Photo-excited methylene blue, accepts an electron to produce semimethylene blue dye species, whereas, surface adsorbed rhodamine B upon excitation injects electrons to the conduction band of the semiconductor [7].a…”

Section: ____________________________________________________________mentioning

confidence: 99%

Visible Light Solar Photocatalytic Degradation of Pulp and Paper Wastewater Using Dye-Sensitised Tio2

Priya¹

2015

IJRET

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Visible light induced photodegradation of organic pollutants on dye adsorbed TiO2 surface

Cited by 163 publications

References 31 publications

Photocatalytic Activities of TiO2 Modified by Poly(fluorene- co-bithiophene) under Visible Light

Photocatalytic Activities of TiO2 Modified by Poly(fluorene- co-bithiophene) under Visible Light

Photochemical hydrogen evolution from aqueous triethanolamine solutions sensitized by binaphthol-modified titanium(IV) oxide under visible-light irradiation

Visible Light Solar Photocatalytic Degradation of Pulp and Paper Wastewater Using Dye-Sensitised Tio2

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