期刊
ELECTROCHIMICA ACTA
卷 374, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2021.137968
关键词
Bisphenol A; Ultrasonication; Polyaniline; Gold nanoparticles; Electrocatalysts
资金
- Ministry of Education, Bangladesh [PS20191122]
- King Saud University [RG- 1440-102]
- Center of Excellence in Nanotechnology (CENT), King Fahd University of Petroleum & Minerals, Saudi Arabia
A conducting polymer and nanometal composite electrocatalyst was prepared for sensitive detection of BPA, with electrochemical studies showing synergistic promotion of electron transfer by PANI and AuNPs, resulting in a low detection limit of 0.4 nM.
In this work, a conducting polymer and nanometal composite electrocatalyst was prepared for the sensitive detection of bisphenol A (BPA) over a wide concentration window. Polyaniline (PANI) was first prepared from aniline through a chemical method, and gold nanoparticles (AuNPs) were embedded with the prepared PANI via ultrasonication to obtain the PANI_AuNPs electrocatalyst. The morphological, chemical, and electrochemical properties of the electrocatalyst were then determined, and BPA oxidation was investigated with the help of electroanalytical techniques to understand the electron-transfer process occurring at the PANI_AuNPs interface. The results showed that BPA was oxidized through a multistep electron-transfer process without any intermediate chemical step, and the rate-determining step was the second electron-transfer step. The oxidation proceeded as a 2e(-)/2H(+) process with an electron-transfer coefficient of similar to 0.69. These results indicate that the PANI and AuNPs work synergistically to promote the electron transfer from BPA. The quantitative analysis gave a broad linear range and a low limit of detection of 0.4 nM. The sensor was also tested for the detection of BPA in tap water, bottled water, and a canned beverage for real sample analysis. (c) 2021ElsevierLtd. Allrightsreserved.
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