期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 169, 期 1, 页码 -出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1945-7111/ac4ab2
关键词
Au-CuNPs@PSi nanocomposite; Electrocatalysis; Nanosensor; Screen-printed carbon electrode; Simultaneous determination; Codeine; Acetaminophen
资金
- Research Council of Urmia University
In this study, Au-CuNPs@PSi nanocomposite was successfully fabricated and used as a modifier in SPCE for the simultaneous determination of COD and ACE with high sensitivity. The combination of PSi and metal nanoparticles provides a porous and high surface area with excellent electrical conductivity. The nanosensor exhibits low detection limits and wide linear ranges for COD and ACE, and performs well in real samples.
In the present study, a bimetallic nanostructure of gold-copper (Au-CuNPs) was decorated on the surface of porous silicon (PSi) using an easy galvanic replacement reaction between metal ions and PSi in the presence of 0.1 M hydrofluoric acid solution. The morphology and structures of the Au-CuNPs@PSi nanocomposite were characterized using X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FE-SEM), fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) energy-dispersive X-ray spectroscopy (EDX) and cyclic voltammetry (CV) techniques. Then, prepared nanocomposite was used as a modifier in screen-printed carbon electrode (SPCE) for the highly sensitive simultaneous determination of codeine (COD) and acetaminophen (ACE). The combination of PSi and metals nanoparticles provide a porous and high surface area with excellent electrical conductivity which leads to reduce the peak potentials and enhance the oxidation peak currents of COD and ACE at the surface of the Au-CuNPs@PSi/SPCE nanosensor. The dynamic linear ranges were obtained from 0.06 to 0.6 mu M for both COD and ACE and the detection limits (3.0 S/N) estimated 0.35 mu M for COD and 0.30 mu M for ACE, respectively. Moreover, recovery tests were carried out in real samples such as urine, human blood plasma, and tablets.
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