A copper-organic framework/graphene modified electrode for sensitive electrochemical detection of bisphenol A

• Published in: Journal of applied electrochemistry Vol. 55; no. 1; pp. 177 - 188
• Main Authors: Zhang, Lina, Ma, Hainan, Sun, Haolin, Zhang, Xiaoyu, Sun, Ruimeng, Zheng, Haoran, Wang, Han, Wang, Yurou, Guo, Jiayu, Liu, Yanqi, Qi, Yanfei
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.01.2025; Springer Nature B.V
• Subjects: Accumulation; Bisphenol A; Cetyltrimethylammonium bromide; Chemical sensors; Chemistry; Chemistry and Materials Science; Composite materials; Copper; Electrochemical analysis; Electrochemistry; Electrodes; Electron transport; Food packaging; Graphene; Industrial Chemistry/Chemical Engineering; Metal-organic frameworks; Noise sensitivity; Physical Chemistry; Recovery; Research Article; Sensors; Signal to noise ratio; Surface area; Synergistic effect; Synthesis; Transport rate; Voltammetry; X ray photoelectron spectroscopy; Electrochemistry; Signal enhancement; Bisphenol A; Graphene; Modified electrode; Copper-organic framework
• ISSN: 0021-891X; 1572-8838
• DOI: 10.1007/s10800-024-02160-6

Bisphenol A (BPA), a known endocrine-disrupting chemical, has been the subject of widespread bans in food packaging and baby bottles. Due to the potential health risks associated with BPA exposure, precise detection methods are crucial for toxicity assessments, ensuring food safety, and monitoring environmental pollutants. To address this imperative, we have developed an electrochemical sensor utilizing a composite material composed of copper-organic framework (Cu-MOF), cetyltrimethylammonium bromide (CTAB), and graphene (GN). This modified composite, known as CTAB-GN-Cu-MOF, was successfully synthesized and characterized via SEM, FT-IR, XPS, XRD, Zeta, and Size analyses. The integration of Cu-MOF, CTAB, and GN resulted in a synergistic effect, enhancing the electron transport rate and accumulation efficiency for BPA. This technological advancement led to increased signals in differential pulse voltammetry and a substantial electroactive surface area (0.031 cm 2 ). The sensor exhibited a linear response range from 0.100 to 800 μmol L −1 with a detection limit of 35.0 nmol L −1 (signal-to-noise ratio of 3). The sensitivity was measured at 0.890 μA μM −1  cm −2 within the concentration range of 25.0–800 μmol L −1 and 8.87 μA μmol −1  cm −2 within the range of 0.10–10.0 μmol L −1 . The device demonstrated stable and satisfactory recovery rates between 96.56% and 103.88% when detecting BPA in various plastic samples, highlighting its potential for practical applications. Graphical Abstract An electrochemical sensing platform with good performance based on a CTAB-GN-Cu-MOF modified electrode was fabricated in this paper for simultaneous detection of Bisphenol A (BPA). This modified composite, CTAB-GN-Cu-MOF, was successfully synthesized and characterized via SEM, FT-IR, XPS, XRD, Zeta, and Size analyses. The integration of Cu-MOF, CTAB, and GN resulted in a synergistic effect, enhancing the electron transport rate and accumulation efficiency for BPA. This technological advancement increased signals in differential pulse voltammetry and a substantial electroactive surface area (0.031 cm 2 ). The sensor exhibited a linear response range from 0.100 to 800 μmol L −1 with a detection limit of 35.0 nmol L −1 . The device demonstrated stable and satisfactory recovery rates between 96.56% and 103.88% when detecting BPA in various plastic samples, highlighting its potential for practical applications.