A high-performance electrochemical dopamine sensor based on a platinum–nickel bimetallic decorated poly(dopamine)-functionalized reduced graphene oxide nanocomposite. Issue 31 (27th July 2017)

• Record Type: Journal Article
• Authors: Shen, Yu; Sheng, Qinglin; Zheng, Jianbin
• Is Part Of: Analytical methods. Volume 9:Issue 31(2017)
• Page Start: 4566
• Page End: 4573
• Publication Date: 2017-07-27
• Subjects: Chemistry, Analytic -- Periodicals; Analytical biochemistry -- Periodicals; Chemical laboratories -- Standards -- Periodicals; 543.1905
• DOI: 10.1039/c7ay00717e
• Languages: English
• ISSNs: 1759-9660

Abstract

Abstract : A nanocomposite of platinum–nickel bimetallic decorated poly(dopamine)-functionalized reduced graphene oxide (Pt–Ni/PDA/rGO) was synthesized by a facile method and a high-performance electrochemical sensor for dopamine detection was fabricated. Abstract : A nanocomposite of platinum–nickel bimetallic decorated poly(dopamine)-functionalized reduced graphene oxide (Pt–Ni/PDA/rGO) was prepared by a facile and attractive method. Furthermore, a high-performance electrochemical sensor for the detection of dopamine was fabricated by dropping the Pt–Ni/PDA/rGO nanocomposites on a glassy carbon electrode. The morphology and composition of the Pt–Ni/PDA/rGO nanocomposites were characterized by field emission-scanning electron microscopy, transmission electron microscopy, X-ray powder diffraction, energy-dispersive X-ray spectroscopy, Raman microscopy and X-ray photoelectron spectroscopy. Electrochemical impedance spectroscopy, cyclic voltammetry and chronoamperometry were used to investigate the electrochemical behavior of the Pt–Ni/PDA/rGO nanocomposites. The linear range and detection limit were 0.2–911 μM and 0.07 μM, respectively. The sensitivity of this non-enzymatic dopamine sensor was calculated to be 912.8 μA mM −1 cm −2 . Moreover, the Pt–Ni/PDA/rGO nanocomposite-modified GCE also showed good anti-interference ability and stability.