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

Research output: Contribution to journalArticlepeer-review

11 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 languageEnglish
Article number127669
JournalMaterials Letters
Volume269
DOIs
Publication statusPublished - 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

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