Preparation of mesoporous TiO2/CNT nanocomposites by synthesis of mesoporous titania via EISA and their photocatalytic degradation under visible light irradiation

Rajasekar, K.; Thennarasu, Sathiah; Rajesh, R.; Abirami, R.; Ameen, K. Balkis; Ramasubbu, A.

doi:10.1016/j.solidstatesciences.2013.09.003

Cited by 36 publications

(14 citation statements)

References 63 publications

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“…18(d)). Visible light active CNT-TiO 2 nanocomposites can also be prepared using other methods such as supercritical fluid deposition, 520 solvothermal, 521 evaporation induced selfassembly (EISA) 522 and biomimetic mineralization 523 for photocatalytic degradation applications. Among the many different strategies that have been developed so far, the sol-gel method is the most commonly used approach to synthesize CNT-TiO 2 binary nanocomposites.…”

Section: Photocatalytic Degradationmentioning

confidence: 99%

Carbon nanotube catalysts: recent advances in synthesis, characterization and applications

et al. 2015

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Carbon nanotubes are promising materials for various applications. In recent years, progress in manufacturing and functionalizing carbon nanotubes has been made to achieve the control of bulk and surface properties including the wettability, acid-base properties, adsorption, electric conductivity and capacitance. In order to gain the optimal benefit of carbon nanotubes, comprehensive understanding on manufacturing and functionalizing carbon nanotubes ought to be systematically developed. This review summarizes methodologies of manufacturing carbon nanotubes via arc discharge, laser ablation and chemical vapor deposition and functionalizing carbon nanotubes through surface oxidation and activation, doping of heteroatoms, halogenation, sulfonation, grafting, polymer coating, noncovalent functionalization and nanoparticle attachment. The characterization techniques detecting the bulk nature and surface properties as well as the effects of various functionalization approaches on modifying the surface properties for specific applications in catalysis including heterogeneous catalysis, photocatalysis, photoelectrocatalysis and electrocatalysis are highlighted.

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Section: Photocatalytic Degradationmentioning

confidence: 99%

Carbon nanotube catalysts: recent advances in synthesis, characterization and applications

et al. 2015

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“…may react with H 2 O resulting in formation of hydroxyl (HO Á ) radicals. These highly reactive radical species are responsible for decomposition of organic dyes [34,35]. The addition of CNT may also prevent agglomeration of TiO 2 particles and reducing particle size, which may increase available surface sites for photocatalytic process.…”

Section: Photocatalysismentioning

confidence: 99%

“…However, these procedures may require complex synthetic procedures and not be economical. There have also been efforts to enhance photocatalytic performance of TiO 2 using carbonaceous materials as support such as C 60 [30], CNT [31][32][33][34][35] and Graphene [36,37], and most of such studies deal with degradation of dyes under UV light.…”

Section: Introductionmentioning

confidence: 99%

Visible light assisted photocatalytic degradation of organic dyes on TiO2–CNT nanocomposites

Hemalatha

Madras

Ramesha

2014

J Sol-Gel Sci Technol

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Carbon nanotubes (CNTs) uniformly decorated with nano-anatase TiO 2 particles corresponding to different TiO 2 -CNT weight ratios (up to 90 % TiO 2 :10 % CNT) were prepared by employing sol-gel process. The nanocomposites were characterized by X-ray diffraction, IR, Raman, Scanning electron microscopy, Transmission electron microscopy, Photoluminescence, BET surface area and diffuse reflectance measurements. The composites show visible light assisted photocatalytic property, for example, the 90 % TiO 2 -10 % CNT composite completely degrades Indigo Carmine dye within 1 h of exposure to visible light. Similarly, Orange G and Congo Red dyes were decomposed within 2 h under visible light irradiation. The excellent visible light photocatalytic property of the composite is attributed to the synergetic effect of photoexcitation and photosensitization. This is due to the special nanoarchitecture wherein TiO 2 nanoparticles are anchored to CNT surface that provides high specific interfacial area for photon absorption and electron trapping.

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“…Titanium dioxide (TiO 2 ) has emerged as the most preferable among many photocatalysts because of its many desirable properties such as nontoxicity, strong oxidizing power, low cost, ready availability, and long term photostability [8]. However, application of TiO 2 is hindered by its large band gap (3.2 eV), which translates to use of high energy UV radiation for activation.…”

Section: Introductionmentioning

confidence: 99%

Double Walled Carbon Nanotube/TiO₂ Nanocomposites for Photocatalytic Dye Degradation

Kuvarega

Mamba

2016

Journal of Nanomaterials

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Double walled carbon nanotube (DWCNT)/N,Pd codoped TiO 2 nanocomposites were prepared by a modified sol-gel method and characterised using FTIR, Raman spectroscopy, TGA, DRUV-Vis, XRD, SEM, and TEM analyses. TEM images showed unique pearl-bead-necklace structured morphologies at higher DWCNT ratios. The nanocomposite materials showed characteristic anatase TiO 2 Raman bands in addition to the carbon nanotube D and G bands. Red shifts in the UV-Vis absorption edge were observed at low DWCNT percentages. The photocatalytic activity of DWCNT/N,Pd TiO 2 nanocomposite was evaluated by the photocatalytic degradation of eosin yellow under simulated solar light irradiation and the 2% DWCNT/N,Pd TiO 2 nanocomposite showed the highest photoactivity while the 20% DWCNT/N,Pd TiO 2 hybrid was the least efficient. The photocatalytic enhancement was attributed to the synergistic effects of the supporting and electron channeling role of the DWCNTs as well as the electron trapping effects of the platinum group metal. These phenomena favour the separation of the photogenerated electron-hole pairs, reducing their recombination rate, which consequently lead to significantly enhanced photoactivity.

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Preparation of mesoporous TiO2/CNT nanocomposites by synthesis of mesoporous titania via EISA and their photocatalytic degradation under visible light irradiation

Cited by 36 publications

References 63 publications

Carbon nanotube catalysts: recent advances in synthesis, characterization and applications

Carbon nanotube catalysts: recent advances in synthesis, characterization and applications

Visible light assisted photocatalytic degradation of organic dyes on TiO2–CNT nanocomposites

Double Walled Carbon Nanotube/TiO₂ Nanocomposites for Photocatalytic Dye Degradation

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Preparation of mesoporous TiO2/CNT nanocomposites by synthesis of mesoporous titania via EISA and their photocatalytic degradation under visible light irradiation

Cited by 36 publications

References 63 publications

Carbon nanotube catalysts: recent advances in synthesis, characterization and applications

Carbon nanotube catalysts: recent advances in synthesis, characterization and applications

Visible light assisted photocatalytic degradation of organic dyes on TiO2–CNT nanocomposites

Double Walled Carbon Nanotube/TiO2 Nanocomposites for Photocatalytic Dye Degradation

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Double Walled Carbon Nanotube/TiO₂ Nanocomposites for Photocatalytic Dye Degradation