Polyaniline/Al Bismuthate Composite Nanorods Modified Glassy Carbon Electrode for the Detection of Benzoic Acid

Author(s): Lizhai Pei, Fanglv Qiu, Yue Ma, Feifei Lin, Chuangang Fan*, Xianzhang Ling*

Journal Name: Current Pharmaceutical Analysis

Volume 16 , Issue 2 , 2020


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Graphical Abstract:


Abstract:

Context: Benzoic acid is a kind of extensively used preservative. It is of great significance to detect benzoic acid by a rapid method for quality assurance and protection in the fields of pharmaceutical, food and chemistry industry.

Objective: The present research is aimed to prepare polyaniline/Al bismuthate composite nanorods by an in-situ polymerizing process for effective detection of benzoic acid.

Methods: The polyaniline/Al bismuthate composite nanorods are prepared by an in-situ polymerizing process. The structure, morphology and electrochemical performance of the obtained polyaniline/Al bismuthate composite nanorods are analyzed by X-ray diffraction (XRD), transmission electron microscopy and electrochemical measurement.

Results: XRD and transmission electron microscopy observations show that the amorphous nanoscale polyaniline particles attach to the surface of the crystalline nanorods. The electrochemical measurement of 2 mM benzoic acid using the composite nanorods modified glassy carbon electrode (GCE) shows that a pair of semi-reversible CV peaks is located at -0.11 V (cvp1) and -0.48 V (cvp1′), respectively. The electrochemical responses of 2 mM benzoic acid at the composite nanorods modified GCE are enhanced with increasing the scan rate and benzoic acid concentration. The polyaniline/Al bismuthate composite nanorods modified GCE shows a linear range of 0.001-2 mM with the limit of detection (LOD) of 0.18 µM.

Conclusion: The composite nanorods may be used as the electrode materials with good reproducibility and stability for the detection of benzoic acid.

Keywords: Al bismuthate nanorods, polyaniline, composites, glassy carbon electrode, electrochemical detection, benzoic acid.

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Article Details

VOLUME: 16
ISSUE: 2
Year: 2020
Published on: 23 January, 2020
Page: [153 - 158]
Pages: 6
DOI: 10.2174/1573412914666181017145307
Price: $65

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