Aqueous synthesis of glutathione-capped CuInS2/ZnS quantum dots-graphene oxide nanocomposite as fluorescence “switch OFF” for explosive detection

Rodney Maluleke; El Hadji Mamour Sakho; Oluwatobi S. Oluwafemi

doi:10.1016/j.matlet.2020.127669

Aqueous synthesis of glutathione-capped CuInS₂/ZnS quantum dots-graphene oxide nanocomposite as fluorescence “switch OFF” for explosive detection

Rodney Maluleke, El Hadji Mamour Sakho, Oluwatobi S. Oluwafemi

Chemical Sciences

University of Johannesburg

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

This work reports a simple and fast aqueous preparation of CuInS₂/ZnS-graphene oxide (CIS/ZnS-GO) nanocomposite as a fluorescence “switch OFF” probe for the fluorescence detection of 2, 4, 6-trinitrophenol (TNP.) – a raw material for various explosive devices. The as-synthesized nanocomposites was characterised using Ultraviolet–visible (UV–Vis) spectroscopy, photoluminescence (PL) spectroscopy, high resolution transmission electron microscopy (HR-TEM), Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and Raman scattering. The PL studies revealed that the adsorption of TNP onto GO via π-π stacking enhanced the charges transfer from CuInS₂/ZnS-GO to the analyte. The limit of detection (LOD) for the analyte is 57 μΜ.

Original language	English
Article number	127669
Journal	Materials Letters
Volume	269
DOIs	https://doi.org/10.1016/j.matlet.2020.127669
Publication status	Published - 15 Jun 2020

Keywords

Detection
Explosive
Fluorescence
Nanocomposite
Quenching
Trinitrophenol

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1016/j.matlet.2020.127669

Cite this

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title = "Aqueous synthesis of glutathione-capped CuInS2/ZnS quantum dots-graphene oxide nanocomposite as fluorescence “switch OFF” for explosive detection",

abstract = "This work reports a simple and fast aqueous preparation of CuInS2/ZnS-graphene oxide (CIS/ZnS-GO) nanocomposite as a fluorescence “switch OFF” probe for the fluorescence detection of 2, 4, 6-trinitrophenol (TNP.) – a raw material for various explosive devices. The as-synthesized nanocomposites was characterised using Ultraviolet–visible (UV–Vis) spectroscopy, photoluminescence (PL) spectroscopy, high resolution transmission electron microscopy (HR-TEM), Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and Raman scattering. The PL studies revealed that the adsorption of TNP onto GO via π-π stacking enhanced the charges transfer from CuInS2/ZnS-GO to the analyte. The limit of detection (LOD) for the analyte is 57 μΜ.",

keywords = "Detection, Explosive, Fluorescence, Nanocomposite, Quenching, Trinitrophenol",

author = "Rodney Maluleke and Sakho, {El Hadji Mamour} and Oluwafemi, {Oluwatobi S.}",

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AU - Maluleke, Rodney

AU - Sakho, El Hadji Mamour

AU - Oluwafemi, Oluwatobi S.

PY - 2020/6/15

Y1 - 2020/6/15

N2 - This work reports a simple and fast aqueous preparation of CuInS2/ZnS-graphene oxide (CIS/ZnS-GO) nanocomposite as a fluorescence “switch OFF” probe for the fluorescence detection of 2, 4, 6-trinitrophenol (TNP.) – a raw material for various explosive devices. The as-synthesized nanocomposites was characterised using Ultraviolet–visible (UV–Vis) spectroscopy, photoluminescence (PL) spectroscopy, high resolution transmission electron microscopy (HR-TEM), Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and Raman scattering. The PL studies revealed that the adsorption of TNP onto GO via π-π stacking enhanced the charges transfer from CuInS2/ZnS-GO to the analyte. The limit of detection (LOD) for the analyte is 57 μΜ.

AB - This work reports a simple and fast aqueous preparation of CuInS2/ZnS-graphene oxide (CIS/ZnS-GO) nanocomposite as a fluorescence “switch OFF” probe for the fluorescence detection of 2, 4, 6-trinitrophenol (TNP.) – a raw material for various explosive devices. The as-synthesized nanocomposites was characterised using Ultraviolet–visible (UV–Vis) spectroscopy, photoluminescence (PL) spectroscopy, high resolution transmission electron microscopy (HR-TEM), Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and Raman scattering. The PL studies revealed that the adsorption of TNP onto GO via π-π stacking enhanced the charges transfer from CuInS2/ZnS-GO to the analyte. The limit of detection (LOD) for the analyte is 57 μΜ.

KW - Detection

KW - Explosive

KW - Fluorescence

KW - Nanocomposite

KW - Quenching

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