Aqueous Solution Surface Chemistry of Carbon Nanotubes

Deb, Anup K.; Chusuei, Charles C.

doi:10.5772/51869

Cited by 2 publications

(1 citation statement)

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“…Biologic materials containing proteins, nucleic acids and cells can bind Cd(II) and Pb(II) with high affinity and specificity, but they are more susceptible to the environment which limits their application. Nanomaterials like graphene [18] and carbon nanotubes [19] have many unusual characters such as physicochemical, mechanical, excellent electrical, optical and thermal conductivity, which makes them been applied in many fields. Some researchers tried to combine graphene and carbon nanotubes.…”

Section: Introduction mentioning

confidence: 99%

Graphene oxide/multi-walled carbon nanotubes/gold nanoparticle hybridfunctionalized disposable screen-printed carbon electrode to determine Cd(II) and Pb(II) in soil

Wang

Yin

Zhao

et al. 2019

International Journal of Agricultural and Biological Engineering

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Cadmium (Cd) and lead (Pb) in soil or water environment cause the ecological destruction and environmental deterioration when their contents exceed the natural background values. To trace the concentrations of Cd(II) and Pb(II), a sensitive and selective electrode was developed using disposable screen-printed carbon electrode (SPE) immobilized with a composite film of reduced graphene oxide/carboxylation multi-walled carbon nanotubes/gold nanoparticle hybrid (RGO-MWNT-AuNP) through π-π bind. This highly conductive nano-composite layer, "RGO-MWNT-AuNP," was characterized by scanning electron microscopy, UV-visible spectrometer, cyclic voltammetry, and electrochemical impedance spectroscopy. Square wave stripping voltammetry was applied to RGO-MWNT-AuNP/SPE to electroplate bismuth film and monitor the Cd(II) and Pb(II) simultaneously. To obtain high current responses, the detecting parameters were optimized. Under optimized conditions, the current responses showed a linear relationship with the concentrations of Cd(II) and Pb(II) in the range from 1.0 to 80.0 μg/L with a lower detection limit of 0.7 µg/L and 0.3 µg/L (S/N = 3), respectively. Finally, the prepared electrode was further employed to detect Cd(II) and Pb(II) in soil samples with good results.

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Section: Introduction mentioning

confidence: 99%