A new sensor for methyl paraben using an electrode made of a cellulose nanocrystal–reduced graphene oxide nanocomposite

Wan Elina Faradillawan Khalid, Mohamad Nasir Mat Arip, Latifah Jasmani, Yook Heng Lee

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A new cellulose nanocrystal–reduced graphene oxide (CNC–rGO) nanocomposite was successfully used for mediatorless electrochemical sensing of methyl paraben (MP). Fourier-transform infrared spectroscopy (FTIR) and field-emission scanning electron microscopy (FESEM) studies confirmed the formation of the CNC–rGO nanocomposite. Cyclic voltammetry (CV) studies of the nanocomposite showed quasi-reversible redox behavior. Differential pulse voltammetry (DPV) was employed for the sensor optimization. Under optimized conditions, the sensor demonstrated a linear calibration curve in the range of 2 �- 10−4–9 × 10−4� M with a limit of detection (LOD) of 1 �- 10−4� M. The MP sensor showed good reproducibility with a relative standard deviation (RSD) of about 8.20%. The sensor also exhibited good stability and repeatability toward MP determinations. Analysis of MP in cream samples showed recovery percentages between 83% and 106%. Advantages of this sensor are the possibility for the determination of higher concentrations of MP when compared with most other reported sensors for MP. The CNC–rGO nanocomposite-based sensor also depicted good reproducibility and reusability compared to the rGO-based sensor. Furthermore, the CNC–rGO nanocomposite sensor showed good selectivity toward MP with little interference from easily oxidizable species such as ascorbic acid.

Original languageEnglish
Article number2726
JournalSensors (Switzerland)
Volume19
Issue number12
DOIs
Publication statusPublished - 2 Jun 2019

Fingerprint

Parabens
Nanocomposites
Graphite
cellulose
Cellulose
Oxides
Graphene
nanocomposites
graphene
Electrodes
electrodes
oxides
sensors
Sensors
Fourier Transform Infrared Spectroscopy
Electron Scanning Microscopy
Calibration
Ascorbic Acid
Oxidation-Reduction
ascorbic acid

Keywords

  • Cellulose nanocrystal
  • Electrochemical sensor
  • Methyl paraben
  • Reduced graph ene oxide

ASJC Scopus subject areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Biochemistry
  • Instrumentation
  • Electrical and Electronic Engineering

Cite this

A new sensor for methyl paraben using an electrode made of a cellulose nanocrystal–reduced graphene oxide nanocomposite. / Faradillawan Khalid, Wan Elina; Nasir Mat Arip, Mohamad; Jasmani, Latifah; Lee, Yook Heng.

In: Sensors (Switzerland), Vol. 19, No. 12, 2726, 02.06.2019.

Research output: Contribution to journalArticle

Faradillawan Khalid, Wan Elina ; Nasir Mat Arip, Mohamad ; Jasmani, Latifah ; Lee, Yook Heng. / A new sensor for methyl paraben using an electrode made of a cellulose nanocrystal–reduced graphene oxide nanocomposite. In: Sensors (Switzerland). 2019 ; Vol. 19, No. 12.
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abstract = "A new cellulose nanocrystal–reduced graphene oxide (CNC–rGO) nanocomposite was successfully used for mediatorless electrochemical sensing of methyl paraben (MP). Fourier-transform infrared spectroscopy (FTIR) and field-emission scanning electron microscopy (FESEM) studies confirmed the formation of the CNC–rGO nanocomposite. Cyclic voltammetry (CV) studies of the nanocomposite showed quasi-reversible redox behavior. Differential pulse voltammetry (DPV) was employed for the sensor optimization. Under optimized conditions, the sensor demonstrated a linear calibration curve in the range of 2 �- 10−4–9 × 10−4� M with a limit of detection (LOD) of 1 �- 10−4� M. The MP sensor showed good reproducibility with a relative standard deviation (RSD) of about 8.20{\%}. The sensor also exhibited good stability and repeatability toward MP determinations. Analysis of MP in cream samples showed recovery percentages between 83{\%} and 106{\%}. Advantages of this sensor are the possibility for the determination of higher concentrations of MP when compared with most other reported sensors for MP. The CNC–rGO nanocomposite-based sensor also depicted good reproducibility and reusability compared to the rGO-based sensor. Furthermore, the CNC–rGO nanocomposite sensor showed good selectivity toward MP with little interference from easily oxidizable species such as ascorbic acid.",
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