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Current Pharmaceutical Analysis


ISSN (Print): 1573-4129
ISSN (Online): 1875-676X

Research Article

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* and Xianzhang Ling*

Volume 16, Issue 2, 2020

Page: [153 - 158] Pages: 6

DOI: 10.2174/1573412914666181017145307

Price: $65


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.

Graphical Abstract
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