Carbon Nanotubes Engineering Assisted by Natural Biopolymers

Lu, Luhua; Hu, Ying; Chang, Chunrui; Chen, Wei

doi:10.5772/18016

Cited by 1 publication

(1 citation statement)

References 100 publications

(80 reference statements)

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“…When the pH value of suspension for chitosan-wrapped CNTs is higher than 6.59, the -NH 3 + group deprotonated into -NH 2 , and a precipitate could be observed. The CNTs functionalized by chitosan derivates that contain COOH group deprotonate in an acidic environment of pH lower than 4.66 aggregate [ 47 ]. This could explain the micrometric aggregation of composite shown in Figure 5 after long exposure in the acid buffer at pH 4.0.…”

Section: Resultsmentioning

confidence: 99%

Nitrites Detection with Sensors Processed via Matrix-Assisted Pulsed Laser Evaporation

et al. 2022

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This work is focused on the application of a laser-based technique, i.e., matrix-assisted pulsed laser evaporation (MAPLE) for the development of electrochemical sensors aimed at the detection of nitrites in water. Commercial carbon-based screen-printed electrodes were modified by MAPLE via the application of a newly developed composite coating with different concentrations of carbon nanotubes (CNTs), chitosan, and iron (II) phthalocyanine (C32H16FeN8). The performance of the newly fabricated composite coatings was evaluated both by investigating the morphology and surface chemistry of the coating, and by determining the electro-catalytic oxidation properties of nitrite with bare and modified commercial carbon-based screen-printed electrode. It was found that the combined effect of CNTs with chitosan and C32H16FeN8 significantly improves the electrochemical response towards the oxidation of nitrite. In addition, the MAPLE modified screen-printed electrodes have a limit of detection of 0.12 µM, which make them extremely useful for the detection of nitrite traces.

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Section: Resultsmentioning

confidence: 99%