Roles of titanium dioxide and ion-doped titanium dioxide on photocatalytic degradation of organic pollutants (phenolic compounds and dyes) in aqueous solutions: A review

Teh, Chao Min; Mohamed, Abdul Rahman

doi:10.1016/j.jallcom.2010.10.181

Cited by 415 publications

(215 citation statements)

References 179 publications

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“…The photocatalytic activity is greatly limited by electron-hole recombination, and therefore several methods are used to increase the efficiency of charge carrier separation and therefore to improve the photocatalytic performance of the SC photocatalyst [139][140][141]. In this context, the combination of graphene with the SC photocatalyst represents an innovative strategy [55,69,142].…”

Section: The Photocatalytic Process: Fundamentals Of Graphene-tio 2 Pmentioning

confidence: 99%

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Recent Advances in Graphene Based TiO2 Nanocomposites (GTiO2Ns) for Photocatalytic Degradation of Synthetic Dyes

et al. 2017

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Synthetic dyes are widely used in textile, paper, food, cosmetic, and pharmaceutical industries. During industrial processes, some of these dyes are released into the wastewater and their successive release into rivers and lakes produces serious environmental problems. TiO 2 is one of the most widely studied and used photocatalysts for environmental remediation. However, it is mainly active under UV-light irradiation due to its band gap of 3.2 eV, while it shows low efficiency under the visible light spectrum. Regarding the exploration of TiO 2 activation in the visible light region of the total solar spectrum, the incorporation of carbon nanomaterials, such as graphene, in order to form carbon-TiO 2 composites is a promising area. Graphene, in fact, has a large surface area which makes it a good adsorbent for organic pollutants removal through the combination of electrostatic attraction and π-π interaction. Furthermore, it has a high electron mobility and therefore it reduces the electron-hole pair recombination, improving the photocatalytic activity of the semiconductor. In recent years, there was an increasing interest in the preparation of graphene-based TiO 2 photocatalysts. The present short review describes the recent advances in TiO 2 photocatalyst coupling with graphene materials with the aim of extending the light absorption of TiO 2 from UV wavelengths into the visible region, focusing on recent progress in the design and applications in the photocatalytic degradation of synthetic dyes.

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Section: The Photocatalytic Process: Fundamentals Of Graphene-tio 2 Pmentioning

confidence: 99%

“…Titanium dioxide (TiO2) is generally considered the best SC material that can be used as a photocatalyst [18,139,143], showing almost all of the required properties for an efficient photocatalytic process, except for activity under visible light irradiation.…”

Section: The Photocatalytic Process: Fundamentals Of Graphene-tio 2 Pmentioning

confidence: 99%

Recent Advances in Graphene Based TiO2 Nanocomposites (GTiO2Ns) for Photocatalytic Degradation of Synthetic Dyes

et al. 2017

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“…Photocatalytic removal of organic pollutants from water has been a topic of great interest over the years, in which titanium dioxide (TiO 2 ) and its modifications were mostly reported as the photocatalysts [15][16][17][18]. As for photocatalytic degradation of 2,4-D, the most widely used photocatalysts were also TiO 2 and its modifications [2][3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Cobalt Oxide-Modified Titanium Dioxide Nanoparticle Photocatalyst for Degradation of 2,4-Dichlorophenoxyacetic Acid

et al. 2017

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“…Textile dyes are an important class of synthetic organic compounds which are found in water bodies coming from different sources and they represent an environmental danger [3]. In the textile industry, dyes are lost during the dyeing process; the discharge of dyes into the water is unpleasant, not only because of their color, but also because many released dyes are toxic, carcinogenic or mutagenic to life forms [4].…”

Section: Introductionmentioning

confidence: 99%

Kinetic Model for Simultaneous Adsorption/Photodegradation Process of Alizarin Red S in Water Solution by Nano-TiO2 under Visible Light

et al. 2016

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Abstract:The simultaneous adsorption and visible light photodegradation of Alizarin Red S in water solutions were studied in real time mode by using nano-TiO 2 , such as Anatase and Aeroxide P-25, supported on polypropylene strips. Kinetic results of the overall process were compared with those obtained from separated steps of adsorption and photodegradation previously studied; kinetic advantages were evidenced with the simultaneous approach. From the study of different dye concentrations, a kinetic model has been proposed which describes the overall process. This model considered two consecutive processes: The adsorption of dye on TiO 2 surface and its photodegradation. The obtained results were in good agreement with experimental data and can predict the profiles of free dye, dye adsorbed on TiO 2 and photoproduct concentrations during the total process.

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Roles of titanium dioxide and ion-doped titanium dioxide on photocatalytic degradation of organic pollutants (phenolic compounds and dyes) in aqueous solutions: A review

Cited by 415 publications

References 179 publications

Recent Advances in Graphene Based TiO2 Nanocomposites (GTiO2Ns) for Photocatalytic Degradation of Synthetic Dyes

Recent Advances in Graphene Based TiO2 Nanocomposites (GTiO2Ns) for Photocatalytic Degradation of Synthetic Dyes

Cobalt Oxide-Modified Titanium Dioxide Nanoparticle Photocatalyst for Degradation of 2,4-Dichlorophenoxyacetic Acid

Kinetic Model for Simultaneous Adsorption/Photodegradation Process of Alizarin Red S in Water Solution by Nano-TiO2 under Visible Light

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