Physical properties of the CNT:TiO2 thin films prepared by sol–gel dip coating

Ramírez-Morales, E.; Reyes-Coronado, David; Magaña, Carlos; Acosta, Dwight; Alonso-Núñez, G.; Martínez, Omar S.; Mathew, Xavier

doi:10.1016/j.solener.2011.06.027

Cited by 41 publications

(27 citation statements)

References 23 publications

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“…The oxidized (acid-treated) CNT showed peaks of carbonyl and carboxyl groups at 1,650 cm −1 and 1,710 cm −1 , respectively. Furthermore, the carbonyl group was confirmed by a strong peak in the C-O stretching at 1,180 cm −1 (broad band at 1,100-1,300 cm −1 ) [16,24]. These indicated the presence of chemically functional groups on CNT.…”

Section: Acid Treatment Of Cntmentioning

confidence: 89%

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Photocatalytic Improvement under Visible Light in TiO₂ Nanoparticles by Carbon Nanotube Incorporation

Wongaree

Chiarakorn

Chuangchote

2015

Journal of Nanomaterials

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Photocatalytic activity of TiO 2 nanoparticles was successfully enhanced by addition of multiwall carbon nanotubes (MWCNT) to make CNT/TiO 2 nanocomposites by sol-gel method at ambient temperature. CNT treated by HNO 3 : H 2 SO 4 treatment (1 : 3 v/v) was mixed with TiO 2 nanoparticles at various molar ratios and calcination temperatures. The optimal molar ratio of CNT : TiO 2 was found at 0.05 : 1 by weight. The optimal calcination condition was 400 ∘ C for 3 h. From the results, the photocatalytic activities of CNT/TiO 2 nanocomposites were determined by the decolorization of 1 × 10 −5 M methylene blue (MB) under visible light. CNT/TiO 2 nanocomposites could enhance the photocatalytic activity and showed faster for the degradation of MB with only 90 min. The degradation efficiency of the MB solution with CNT/TiO 2 nanocomposite achieved 70% which was higher than that with pristine TiO 2 (22%). This could be explained that CNT prevents TiO 2 from its agglomeration which could further enhance electron transfer in the composites. In addition, CNT/TiO 2 nanocomposites had high specific surface area (202 m 2 /g) which is very promising for utilization as a photocatalyst for environmental applications.

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Section: Acid Treatment Of Cntmentioning

confidence: 89%

“…2 Nanocomposites. Saleh and Gupta [16] and Morales et al [24] reported a method to prepare CNT/TiO 2 nanocomposites at relatively high temperature (70-80 ∘ C) with a long time process (typically 6-8 h). In this work, CNT/TiO 2 nanocomposites were synthesized by sol-gel method adapted from that method.…”

Section: Acid Treatment Of Cntmentioning

confidence: 99%

Photocatalytic Improvement under Visible Light in TiO₂ Nanoparticles by Carbon Nanotube Incorporation

Wongaree

Chiarakorn

Chuangchote

2015

Journal of Nanomaterials

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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%

“…Indeed, MWCNTs are good electrical conductors, and according to several authors, they could delocalise electrons and thus increase the lifetime of e --h ? pairs [7][8][9]. Moreover, MWCNTs could increase UV absorption [8] and also create some Ti-O-C bonds inducing a shift towards higher wavelengths, i.e.…”

Section: Introductionmentioning

confidence: 99%

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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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Characterization of natural dyes on ZnO and TiO2 thin films for applications in DSSC

Robledo

Pantoja

Avendaño

et al. 2023

J Mater Sci: Mater Electron

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Physical properties of the CNT:TiO2 thin films prepared by sol–gel dip coating

Cited by 41 publications

References 23 publications

Photocatalytic Improvement under Visible Light in TiO₂ Nanoparticles by Carbon Nanotube Incorporation

Photocatalytic Improvement under Visible Light in TiO₂ Nanoparticles by Carbon Nanotube Incorporation

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

Characterization of natural dyes on ZnO and TiO2 thin films for applications in DSSC

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Physical properties of the CNT:TiO2 thin films prepared by sol–gel dip coating

Cited by 41 publications

References 23 publications

Photocatalytic Improvement under Visible Light in TiO2 Nanoparticles by Carbon Nanotube Incorporation

Photocatalytic Improvement under Visible Light in TiO2 Nanoparticles by Carbon Nanotube Incorporation

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

Characterization of natural dyes on ZnO and TiO2 thin films for applications in DSSC

Contact Info

Product

Resources

About

Photocatalytic Improvement under Visible Light in TiO₂ Nanoparticles by Carbon Nanotube Incorporation

Photocatalytic Improvement under Visible Light in TiO₂ Nanoparticles by Carbon Nanotube Incorporation