FTIR studies of nitrogen doped carbon nanotubes

Misra, Abha; Tyagi, Pawan; Singh, Manoj K.; Misra, D.S.

doi:10.1016/j.diamond.2005.08.013

Cited by 239 publications

(113 citation statements)

References 22 publications

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“…Additionally it is significantly more difficult to assign peaks from functional attachment groups thereby monitoring chemical modification. [81][82][83] Similar to CNTs, crystalline silicon has minimal infrared absorption. [84] However, modification of the silicon surface, or [a] Purified sample HTVA ¼ 1400;8C (c.f.…”

Section: Characterization Of Nanotubes On Silicon Surfaces 31 Inframentioning

confidence: 99%

Carbon Nanotubes Anchored to Silicon for Device Fabrication

et al. 2010

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This report highlights recent progress in the fabrication of vertically aligned carbon nanotubes (VA-CNTs) on silicon-based materials. Research into these nanostructured composite materials is spurred by the importance of silicon as a basis for most current devices and the disruptive properties of CNTs. Various CNT attachments methods of covalent and adsorptive nature are critically compared. Selected examples of device applications where the VA-CNT on silicon assemblies are showing particular promise are discussed. These applications include field emitters, filtration membranes, dry adhesives, sensors and scaffolds for biointerfaces.

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Section: Characterization Of Nanotubes On Silicon Surfaces 31 Inframentioning

confidence: 99%

Carbon Nanotubes Anchored to Silicon for Device Fabrication

et al. 2010

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“…-1 correspond to C-O bonds (Jiang et al, 2003;Misra et al, 2006), which arise from the carbonate contamination resulting from the atmospheric carbon dioxide reacting with ferrihydrite (Liu et al, 2009). The band at 1676cm -1 is assigned to the O-H bending mode of water, whereas the other O-H stretching bands are in the region 3000-3400cm -1 .…”

Section: Characterization Of Cnt and Cnt-ferrihydrite Compositementioning

confidence: 99%

Preparation, characterization and As(V) adsorption behaviour of CNT-ferrihydrite composites

Poinern¹,

Parsonage²,

Issa³

et al. 2011

Int. J. Eng. Sci. Tech

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A Carbon nano tube (CNT)-Ferrihydrite nanocomposite was synthesized through precipitation in ethyl alcohol media. Its detailed characterization was carried out using XRD, SEM, FTIR and EDAX. The adsorption characteristics of the composite for As(V) removal were carried out as function of pH, adsorbent dose, As(V) concentration and contact time. Although pure CNT did not show any significant adsorption, CNT-Ferrihydrite proved to be a good adsorbent for arsenic. With increase in pH, the As(V) adsorption on the composite first decreased up to pH 5.0, thereafter it remained nearly constant. The adsorption followed the Langmuir isotherm model and from the data its monolayer adsorption capacity was estimated to be 44.1 mg/g. The adsorption data were best described by the pseudo-second order kinetic model.

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“…The two peaks at 1125-1150 cm -1 yield the fingerprint of this carbon. The sharp absorption band at 1125 cm -1 is ascribed to either Si-O (Misra et al, 2005) or C-O stretching in alcohol, ether or hydroxyl groups (Park et al, 1997, Attia et al, 2006. The band at 1150 cm -1 can also be associated with ether C-O symmetric and asymmetric stretching vibration (-C-O-C-ring) (Lapuente et al, 1998).…”

Section: Characterization Of the Produced Carbonmentioning

confidence: 99%

Production and characterization of granular activated carbon from activated sludge

Al-Qodah

Shawabkah

2009

Braz. J. Chem. Eng.

198

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-In this study, activated sludge was used as a precursor to prepare activated carbon using sulfuric acid as a chemical activation agent. The effect of preparation conditions on the produced activated carbon characteristics as an adsorbent was investigated. The results indicate that the produced activated carbon has a highly porous structure and a specific surface area of 580 m 2 /g. The FT-IR analysis depicts the presence of a variety of functional groups which explain its improved adsorption behavior against pesticides. The XRD analysis reveals that the produced activated carbon has low content of inorganic constituents compared with the precursor. The adsorption isotherm data were fitted to three adsorption isotherm models and found to closely fit the BET model with R 2 equal 0.948 at pH 3, indicating a multilayer of pesticide adsorption. The maximum loading capacity of the produced activated carbon was 110 mg pesticides/g adsorbent and was obtained at this pH value. This maximum loading was found experimentally to steeply decrease as the solution pH increases. The obtained results show that activated sludge is a promising low cost precursor for the production of activated carbon.

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FTIR studies of nitrogen doped carbon nanotubes

Cited by 239 publications

References 22 publications

Carbon Nanotubes Anchored to Silicon for Device Fabrication

Carbon Nanotubes Anchored to Silicon for Device Fabrication

Preparation, characterization and As(V) adsorption behaviour of CNT-ferrihydrite composites

Production and characterization of granular activated carbon from activated sludge

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