Multiwalled carbon nanotube/TiO2 nanocomposite as a highly active photocatalyst for photodegradation of Reactive Black 5 dye

Hamid, Sharifah Bee Abd; Tan, Tong Ling; Lai, Chin Wei; Samsudin, Emy Marlina

doi:10.1016/s1872-2067(14)60210-2

Cited by 50 publications

(21 citation statements)

References 32 publications

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“…In the TiO 2 coated nanotubes, calcined 500 and 1000ºC, these bands are considerably shifted to higher wave numbers, between 1342-1359 cm -1 and 1583-1594 cm -1 , respectively. In this case, the upshift of the D band is related to stress induced by the TiO 2 bonded to the surface of the MWCNT 35,36 and the upshift in the G band is due to the high interaction level between the TiO 2 and the MWCNT 37,38 . Figure 2 shows the X-ray diffractograms obtained from samples of TiO 2 coated MWCNT, calcined at 500 and 1000ºC.…”

Section: Resultsmentioning

confidence: 99%

Production of TiO2 Coated Multiwall Carbon Nanotubes by the Sol-Gel Technique

2017

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In recent years, efforts in developing high strength-low density materials are increasing significantly. One of the promising materials to attend this demand is the carbon nanotube (CNT), to be used mainly as a reinforcing phase in lightweight metal matrix composites (MMC). In the present work, the sol-gel technique has been employed to obtain TiO 2 coating on the surface of commercial multiwall carbon nanotubes (MWCNT). The aim of such coating is to improve the thermal stability of MWCNT in oxidize environment, which is necessary in most of MMC processing routes. Calcination in inert atmosphere was performed in order to crystallize a stable coating phase. The hybrid CNT/TiO 2 nanocomposite was characterized by X-Ray Diffractometry (XRD), Raman spectroscopy, Thermogravimetry (TGA) and Field Emission Gun -Scanning Electron Microscopy (FEG-SEM). The coating structure was observed to change from anatase to rutile, as the calcination temperature increases from 500 to 1000ºC. Results from thermogravimetric analysis showed that the samples calcined at 1000 ºC were more resistant to oxidation at high temperatures.

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Section: Resultsmentioning

confidence: 99%

Production of TiO2 Coated Multiwall Carbon Nanotubes by the Sol-Gel Technique

2017

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“…Both bands are slightly shifted to larger wavenumbers, when comparing to Figure 7(a). According to the literature [41,42], upshift of the D band can be related to stresses induced by the presence of TiO 2 shell on the surface of the MWCNT core, and the upshift of the G band is due to a high-structural interaction (bonding) between the TiO 2 and the MWCNTs [43,44].…”

Section: Advances In Materials Science and Engineeringmentioning

confidence: 99%

Core/Shell Structure of TiO₂‐Coated MWCNTs for Thermal Protection for High‐Temperature Processing of Metal Matrix Composites

Rodriguez

Travessa

2018

Advances in Materials Science and Engineering

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e production of metal matrix composites with elevated mechanical properties depends largely on the reinforcing phase properties. Due to the poor oxidation resistance of multiwalled carbon nanotubes (MWCNTs) as well as their high reactivity with molten metal, the processing conditions for the production of MWCNT-reinforced metal matrix composites may be an obstacle to their successful use as reinforcement. Coating MWCNTs with a ceramic material that acts as a thermal protection would be an alternative to improve oxidation stability. In this work, MWCNTs previously functionalized were coated with titanium dioxide (TiO 2 ) layers of different thicknesses, producing a core-shell structure. Heat treatments at three different temperatures (500°C, 750°C, and 1000°C) were performed on coated nanotubes in order to form a stable metal oxide structure. e MWCNT/TiO 2 hybrids produced were evaluated in terms of thermal stability. ermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy (RS), and X-ray photoelectron spectroscopy (XPS) were performed in order to investigate TiO 2 -coated MWCNT structure and thermal stability under oxidative atmosphere. It was found that the thermal stability of the TiO 2 -coated MWCNTs was dependent of the TiO 2 layer morphology that in turn depends on the heat treatment temperature.

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“…Multiwalled Carbon Nano Tube (MWCNT)/TiO 2 photocatalyst was prepared by Hamid et al [14] with Titanium Isopropoxide and functionalized MWCNT as the starting precursors using…”

Section: Tio 2 As Photocatalystmentioning

confidence: 99%

Review on the photocatalytic activity of various composite catalysts

Sudha¹,

Palanisamy²

2015

Chemical Engineering and Processing: Process Intensification

241

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Multiwalled carbon nanotube/TiO2 nanocomposite as a highly active photocatalyst for photodegradation of Reactive Black 5 dye

Cited by 50 publications

References 32 publications

Production of TiO2 Coated Multiwall Carbon Nanotubes by the Sol-Gel Technique

Production of TiO2 Coated Multiwall Carbon Nanotubes by the Sol-Gel Technique

Core/Shell Structure of TiO₂‐Coated MWCNTs for Thermal Protection for High‐Temperature Processing of Metal Matrix Composites

Review on the photocatalytic activity of various composite catalysts

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Multiwalled carbon nanotube/TiO2 nanocomposite as a highly active photocatalyst for photodegradation of Reactive Black 5 dye

Cited by 50 publications

References 32 publications

Production of TiO2 Coated Multiwall Carbon Nanotubes by the Sol-Gel Technique

Production of TiO2 Coated Multiwall Carbon Nanotubes by the Sol-Gel Technique

Core/Shell Structure of TiO2‐Coated MWCNTs for Thermal Protection for High‐Temperature Processing of Metal Matrix Composites

Review on the photocatalytic activity of various composite catalysts

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Product

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Core/Shell Structure of TiO₂‐Coated MWCNTs for Thermal Protection for High‐Temperature Processing of Metal Matrix Composites