Rapid and highly selective electrochemical sensor based on ZnS/Au-decorated f-multi-walled carbon nanotube nanocomposites produced via pulsed laser technique for detection of toxic nitro compounds.

Journal of Hazardous Materials
Shreyanka Shankar NaikMyong Yong Choi

Abstract

Novel ZnS/Au/f-multi-walled carbon nanotube (MWCNT) nanostructures were produced via a pulsed laser-assisted technique followed by a wet chemical process. ZnS nanospheres were synthesized via pulsed laser ablation of a Zn target in DMSO, which was used as a solvent and sulfur source. Notably, no additional sulfur sources, surfactants, or reducing agents were used during the synthesis. The structure and morphology of the prepared materials were characterized by X-ray diffraction, micro-Raman spectroscopy, X-ray photoelectron spectroscopy, ultraviolet-visible spectroscopy, field emission scanning electron microscopy, and high-resolution transmission electron microscopy. The fabricated electrochemical sensor based on ZnS/Au/f-MWCNT nanocomposites exhibited rapid and highly selective detection of a toxic pollutant, namely 4-nitrophenol (4-NP). Linear sweep voltammetry analysis revealed that the optimized ZnS/Au10/f-MWCNT3 nanocomposite displayed a wide linear dynamic response (10-150 μM) with high sensitivity (0.8084μAμM-1cm-2) and low limit of detection (30 nM). The excellent 4-NP sensing performance of the modified electrode was attributed to the availability of numerous active sites (electrochemical surface area=0.00369μFcm-2) a...Continue Reading

References

May 12, 2015·Journal of Nanoscience and Nanotechnology·Kwan-Woo SongCheol-Woong Yang
Jun 20, 2015·Environmental Science and Pollution Research International·Tawfik A Saleh
Sep 19, 2018·Chemical Reviews·Vera SchroederTimothy M Swager
Oct 21, 2018·Journal of Environmental Sciences (China)·Hyeon Jin JungMyong Yong Choi
Jun 4, 2019·Environmental Science and Pollution Research International·Manikandan RamalingamSriman Narayanan Sangilimuthu
Feb 6, 2021·Journal of Hazardous Materials·Jayaraman TheerthagiriMyong Yong Choi

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