Syntheses of Carbon Nanotube-Metal Oxides Composites; Adsorption and Photo-degradation

Gupta, Vinod Kumar; Saleh, Tawfik A.

doi:10.5772/18009

Cited by 72 publications

(61 citation statements)

References 59 publications

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“…In figure 3(a), the peaks at about 2θ=20°and 45°attributed to the pure PAr [20] which were still detected for PAr/MWCNT composites (figures 3(b) and (c)), suggesting the structure of PAr was well retained during the melt mixing and compression molding processes of PAr with MWCNT. The characteristic sharp peak observed at 2θ=25.2°(figure 3(c)) confirms the presence of MWCNTs in the composites [21][22][23][24].…”

Section: Resultssupporting

confidence: 53%

MWCNT induced negative real permittivity in a copolyester of Bisphenol-A with terephthalic and isophthalic acids

Özdemir

Daşdan

Kavak

et al. 2020

Mater. Res. Express

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In the present study, the negative real permittivity behavior of a copolyester of bisphenol-A with terephthalic acid and isophthalic acid (PAr) containing 1.5 to 7.5 wt% multi-walled carbon nanotubes (MWCNTs) have been investigated in detail. The structural and morphological analysis of the meltmixed composites was performed by Fourier transform infrared spectroscopy using attenuated total reflection (FTIR-ATR), atomic force microscopy (AFM), x-ray diffraction (XRD), and light microscopy. The influences of the MWCNT filler on the AC impedance, complex permittivity, and AC conductivity of the PAr polymer matrix were investigated at different operating temperatures varied between 296 K and 373 K. The transition from a negative to positive real permittivity was observed at different crossover frequencies depending on the MWCNT content of the composites whereas pure PAr showed positive values at all frequencies. The negative real permittivity characteristic of the composites was discussed in the context of Drude model.

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Section: Resultssupporting

confidence: 53%

MWCNT induced negative real permittivity in a copolyester of Bisphenol-A with terephthalic and isophthalic acids

Özdemir

Daşdan

Kavak

et al. 2020

Mater. Res. Express

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“…Depending on the type of metal oxide, the characteristic peak of the metal oxide nanoparticles appears between 500 and 1000 cm -1 . Typically, this peak appears at 700 cm -1 for WO 3 nanoparticles [31], and as shown in Fig. 2, the WO 3 nanoparticles have a wide peak in the range of 500-900 cm -1 .…”

Section: Resultsmentioning

confidence: 93%

Facile synthesis of decorated graphene oxide sheets with WO3 nanoparticles

Adineh

Rasuli

2015

Appl. Phys. A

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Potential applications of graphene oxide (GO) nanocomposites have attracted remarkable attention to modify its properties by functionalizing and decorating with nanoparticles. In this work, after synthesis of GO sheets by oxidation and exfoliation of natural graphite, they were decorated with tungsten oxide nanoparticles using arc discharge in GO solution. Transmission electron microscopy shows that the chain of WO 3 nanoparticles decorates the GO sheets. Fourier transform infrared spectroscopy and Raman spectroscopy show that WO 3 nanoparticles are attached to GO sheets by bond formation between the tungsten and oxygen of functional groups, especially with epoxides on the GO sheets. Nanocomposite production in different arc currents shows that the greater the electrical current, the stronger the bond is formed between WO 3 and GO. X-ray diffraction confirms that the WO 3 nanoparticles on the GO are highly crystalline in monoclinic phase. Moreover, by increasing the arc current from 20 to 40 A, the band gap energy of GO ? WO 3 decreases to *2.6 eV.

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“…The interaction could be through hydrogen bonding, or the oxygen atoms of hydroxyl or carboxyl groups interact with aluminum atoms through the pair of electrons on the oxygen atoms. The formation of chemical bond is also possible [33].…”

Section: Sensing Mechanism: Region-amentioning

confidence: 99%

Highly efficient Ceramic-SWCNT based free standing films for gas sensing application

Mishra

Islam

2015

Materials Science in Semiconductor Processing

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Syntheses of Carbon Nanotube-Metal Oxides Composites; Adsorption and Photo-degradation

Cited by 72 publications

References 59 publications

MWCNT induced negative real permittivity in a copolyester of Bisphenol-A with terephthalic and isophthalic acids

MWCNT induced negative real permittivity in a copolyester of Bisphenol-A with terephthalic and isophthalic acids

Facile synthesis of decorated graphene oxide sheets with WO3 nanoparticles

Highly efficient Ceramic-SWCNT based free standing films for gas sensing application

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