Preparation and photoelectrocatalytic properties of titania/carbon nanotube composite films

Jiang, Guodong; Zhao, Lin; Zhu, Lihua; Ding, Yaobin; Tang, Heqing

doi:10.1016/j.carbon.2010.05.029

Cited by 59 publications

(28 citation statements)

References 36 publications

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“…Some of the reasons for the improvement in performance include superior characteristics regarding separation of charge carriers within the nanocomposite, 12 excellent electrical conductivity, and a relatively large surface area for physico-chemical processes. Several examples that utilize TiO 2 /CNT nanocomposites have been reported in literature, and these include research on photo-catalysis, [13][14][15][16][17][18][19] electrochemical energy conversion 20 and storage, 21 and dye-sensitized solar cells. 10,14,22,23 Carbon nanotubes can be simply described as a rolled up sheet of graphene, and based on the number of sheets they can be classified as single, double, and multiwalled CNTs.…”

Section: Introductionmentioning

confidence: 99%

“…Use of MWCNTs in DSSCs is an active area of research, and early work in this field used MWCNTs in DSSCs as either a counter electrode, 25 an additive, 26 or as a nanocomposite material. [27][28][29] MWCNT-titania nanocomposites have been fabricated by a number of ways such as sol-gel, 30 mechanical mixing, 10 electro-spinning, 14,23 electrophoresis deposition, 31 novel surfactant solgel wrapping, 18 blending, 13 physical vapour deposition, sputtering deposition, 16 supercritical fluid deposition, 19 capillary action, hydrothermal 32 and chemical vapour deposition (CVD). 33 MWCNTs agglomerate easily and extra care must be taken to ensure that the nanotubes disperse homogeneously within a matrix of interest.…”

Section: Introductionmentioning

confidence: 99%

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Multiwalled carbon nanotube-titania nanocomposites: Understanding nano-structural parameters and functionality in dye-sensitized solar cells

Mombeshora¹,

Simoyi²,

Nyamori³

et al. 2015

S.Afr.j.chem

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Nanocomposites consisting of multiwalled carbon nanotubes and titania were synthesized by two methods, namely, sol-gel and chemical vapour deposition (CVD) methods. The work takes advantage of the bridging ability of nanotechnology between macromolecules and the solid state process in engineering alternative nanomaterials for various applications including solar cell fabrication. Physical and chemical characterization of the mesoporous nanocomposites from the two synthetic methods were investigated using Raman spectroscopy, thermogravimetric analysis, Fourier transformation infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, surface characterization and X-ray diffraction analysis. Physicochemical properties in the nanocomposites such as thermal stability, pore volume, crystallinity and surface area were observed to be a subject of MWCNT: titania ratios and synthetic methods. From the CVD synthetic method, observed attributes include more uniform and smoother coating; better crystallinity and larger pore width than sol-gel method. On the other hand, nanocomposites from sol-gel synthetic method had larger surface areas, were more defective and less thermally stable than those from CVD. Nanocomposites by the CVD method performed 39.2 % more efficient than those from sol-gel in light-harvesting experiments. The study shows that the nanocomposites synthesized were more effective than titania alone when the cheaper natural dye, Eosin B, was used. This highlights the great potential of typical nanomaterials in improving the performances of titania in DSSCs as well as lowering the cost of the ultimate devices.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multiwalled carbon nanotube-titania nanocomposites: Understanding nano-structural parameters and functionality in dye-sensitized solar cells

Mombeshora¹,

Simoyi²,

Nyamori³

et al. 2015

S.Afr.j.chem

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“…Generally, the ways explored to improve the efficiency of DSSCs have focused on upgrading the components of the solar cell to enhance photovoltage (V OC ) by varying (a) the supporting oxide, (b) the electrolyte which stabilizes the solar cell, and (c) the dyes which enhance the photocurrent [4,5]. Carbon in DSC electrodes has gained attention recently, for instance, flexible C to complete with Pt:FTOs [6], C:TiO 2 for photocatalysis [7][8][9].…”

Section: Introduction: Efficiency Improvement Efforts On Dye Solar Cellsmentioning

confidence: 99%

Effect of Carbon Modification on the Electrical, Structural, and Optical Properties ofTiO2Electrodes and Their Performance in Labscale Dye-Sensitized Solar Cells

Taziwa

Meyer

Sideras‐Haddad

et al. 2012

International Journal of Photoenergy

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Carbon-modified titanium dioxide nanoparticles (C:TiO 2 NPs) have been synthesized by ultrasonic nebulizer spray pyrolysis (USP) and pneumatic spray pyrolysis (PSP) techniques. HRTEM on the NPs shows difference in lattice spacing in the NP structures prepared by the two methods-2.02Å for the USP NPs and an average of 3.74Å for the PSP NPs. The most probable particle sizes are 3.11 nm and 5.5 nm, respectively. Raman spectroscopy supported by FTIR confirms the TiO 2 polymorph to be anatase with the intense phonon frequency at 153 cm −1 blue-shifted from 141 cm −1 ascribed to both carbon doping and particle size. A modified phonon confinement model for nanoparticles has been used to extract phonon dispersion and other parameters for anatase for the first time. Electronic measurements show "negative conductance" at some critical bias voltage, which is characteristic of n-type conductivity in the carbon-doped TiO 2 NPs as confirmed by the calculated areas under the I-V curves, a property suited for solar cell applications. Practical solar cells built from carbon-doped TiO 2 electrodes show up to 1.5 times improvement in efficiency compared to pure TiO 2 electrodes of similar construction.

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“…for NH 3 [1], photocatalyst [2][3][4][5][6][7], photoelectrochemical catalyst [3,[8][9][10], antibacterial material [2], easy-to-clean material [11], anode in lithium ion batteries [12] and dyesensitised solar cells [13]. When it is illuminated by UV light, electrons in the valence band are promoted to the conduction band inducing the formation of electron-hole (e --h ? )…”

Section: Introductionmentioning

confidence: 99%

Doping TiO2 films with carbon nanotubes to simultaneously optimise antistatic, photocatalytic and superhydrophilic properties

Léonard

Remy

Heinrichs

2016

J Sol-Gel Sci Technol

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Pure and multiwall carbon nanotube (MWCNT)-doped titanium dioxide (TiO 2 ) films, synthesised from two sol-gel routes (alcoholic and aqueous) and deposited by dipcoating on glass, have been developed as conductive, photocatalytic and superhydrophilic materials. While already crystallised in anatase structure at low temperature when synthesised in water, samples prepared in alcohol are amorphous. Their crystallisation in air has been studied at increasing temperatures. Effective incorporation of functionalised MWCNTs is confirmed in both aqueous and alcoholic samples with a closer interaction with TiO 2 particles in the case of aqueous synthesis. In alcoholic samples, 400°C seems to be an optimised calcination temperature since 300°C does not allow crystallisation into anatase and 500°Cremoves MWCNTs through burning. The purpose of MWCNT doping is to obtain coatings that exhibit easy-toclean or self-cleaning properties. This can be achieved through an optimised combination of electrical conductivity (for antistatic property), photoactivity and superhydrophilicity. These three properties require the crystallisation of TiO 2 into anatase. MWCNT doping dramatically increases both conductivity and photocatalytic activity, especially in alcoholic samples for the former and in aqueous samples for the latter. On the other hand, MWCNT introduction does not significantly affect the (super)hydrophilicity of films, which depends solely on the crystallinity of TiO 2 . Graphical Abstract

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Preparation and photoelectrocatalytic properties of titania/carbon nanotube composite films

Cited by 59 publications

References 36 publications

Multiwalled carbon nanotube-titania nanocomposites: Understanding nano-structural parameters and functionality in dye-sensitized solar cells

Multiwalled carbon nanotube-titania nanocomposites: Understanding nano-structural parameters and functionality in dye-sensitized solar cells

Effect of Carbon Modification on the Electrical, Structural, and Optical Properties ofTiO2Electrodes and Their Performance in Labscale Dye-Sensitized Solar Cells

Doping TiO2 films with carbon nanotubes to simultaneously optimise antistatic, photocatalytic and superhydrophilic properties

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