SPR response of CS-GO nanostructured thin films for selective detection of Pb(II) ions in the Saigon River, Vietnam

N. F. Lokman, Ahmad Ashrif A Bakar, S. Abdul Talib, Fatihah Suja`

Research output: Contribution to journalArticle

Abstract

The use of surface plasmon resonance (SPR) sensors offers a promising quantitative technique for Pb(II) detection in solutions. This study investigated the SPR response of chitosan/graphene oxide (CS-GO) nanostructured thin films in the presence of Pb(II). Gold (Au) or silver (Ag) films incorporating a CS-GO layer were fabricated and characterized by X-ray diffraction (XRD) analysis. The detection limit of Pb(II) solutions was determined using the SPR sensor on samples from the Saigon River, Vietnam. The XRD analysis revealed little difference in the crystallinity for Au/CS-GO and Ag/CS-GO films. The SPR sensitivity towards the Pb(II) ion solution was 1.332° ppm−1 for Ag/ CS-GO, which was slightly higher than that for the Au/CS-GO, which was 1.222° ppm−1. Compared to the Ag/CS-GO film, the Au/CS-GO film was reusable up to three times for all concentrations of Pb(II). Upon exposure to water samples from the Saigon River, both of the films successfully detected Pb(II) even with the interference of other metals. The CS-GO fabricated on the thin films favours the binding potential with the Pb(II) ions. Thus, the proposed Au/CS-GO film may be an economic solution due to higher reusability and higher sensitivity for the detection of Pb(II) in the polluted water.

Original languageEnglish
Pages (from-to)180-186
Number of pages7
JournalDesalination and Water Treatment
Volume93
DOIs
Publication statusPublished - 1 Oct 2017

Fingerprint

Surface plasmon resonance
Chitosan
Graphene
Rivers
oxide
Thin films
Oxides
ion
Ions
river
Oxide films
X ray diffraction analysis
X-ray diffraction
detection
sensor
Sensors
Reusability
crystallinity
Water
silver

Keywords

  • Chitosan
  • Graphene oxide
  • Polluted water
  • SPR
  • Thin films
  • Toxic metals

ASJC Scopus subject areas

  • Water Science and Technology
  • Ocean Engineering
  • Pollution

Cite this

SPR response of CS-GO nanostructured thin films for selective detection of Pb(II) ions in the Saigon River, Vietnam. / Lokman, N. F.; A Bakar, Ahmad Ashrif; Talib, S. Abdul; Suja`, Fatihah.

In: Desalination and Water Treatment, Vol. 93, 01.10.2017, p. 180-186.

Research output: Contribution to journalArticle

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