An electrochemical sensor based on graphene/poly(brilliant cresyl blue) nanocomposite for determination of epinephrine
A graphene modified with poly(brilliant cresyl blue) (PBCB) glassy carbon electrode was fabricated by a simple method of drop-casting and two-step-electropolymerization for facilitating electrocatalytic detection of epinephrine (EP). Surface characterization of PBCB/graphene/GCE was conducted by ele...
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| Published in | Journal of electroanalytical chemistry (Lausanne, Switzerland) Vol. 763; pp. 25 - 31 |
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| Main Authors | , , , , , , |
| Format | Journal Article |
| Language | English |
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Elsevier B.V
15.02.2016
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| Abstract | A graphene modified with poly(brilliant cresyl blue) (PBCB) glassy carbon electrode was fabricated by a simple method of drop-casting and two-step-electropolymerization for facilitating electrocatalytic detection of epinephrine (EP). Surface characterization of PBCB/graphene/GCE was conducted by electrochemical impedance spectroscopy (EIS), whose results showed that the electron transfer process at PBCB/graphene is faster than at bare GCE, graphene/GCE and PBCB/GCE. And the scanning electron microscopy (SEM) image confirmed the graphene dispersion incorporated with PBCB on the GCE. A noticeable enhancement in the microscopic area of the electrode resulted in an appreciable increase of the peak current of EP oxidation (~9.4 times). The catalytic oxidation peak currents obtained from cyclic voltammetry (CV) increased linearly with EP concentrations in the range of 1.0×10−6 to 1.0×10−3mol/L with the limit of detection 2.4×10−7mol/L (S/N=3). Furthermore, the fabricated PBCB/graphene/GCE nanocomposite can determine EP in the presence of a large excess of ascorbic acid (AA) and uric acid (UA) by differential pulse voltammetry (DPV). The modified electrode can be used for the determination of EP in practical pharmaceutical formulation. |
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| AbstractList | A graphene modified with poly(brilliant cresyl blue) (PBCB) glassy carbon electrode was fabricated by a simple method of drop-casting and two-step-electropolymerization for facilitating electrocatalytic detection of epinephrine (EP). Surface characterization of PBCB/graphene/GCE was conducted by electrochemical impedance spectroscopy (EIS), whose results showed that the electron transfer process at PBCB/graphene is faster than at bare GCE, graphene/GCE and PBCB/GCE. And the scanning electron microscopy (SEM) image confirmed the graphene dispersion incorporated with PBCB on the GCE. A noticeable enhancement in the microscopic area of the electrode resulted in an appreciable increase of the peak current of EP oxidation (~9.4 times). The catalytic oxidation peak currents obtained from cyclic voltammetry (CV) increased linearly with EP concentrations in the range of 1.0×10−6 to 1.0×10−3mol/L with the limit of detection 2.4×10−7mol/L (S/N=3). Furthermore, the fabricated PBCB/graphene/GCE nanocomposite can determine EP in the presence of a large excess of ascorbic acid (AA) and uric acid (UA) by differential pulse voltammetry (DPV). The modified electrode can be used for the determination of EP in practical pharmaceutical formulation. |
| Author | Liang, Xizhen Zou, Hongbin Zhou, Yueming Ma, Jianguo Wang, Zhenzhen Wang, Min Ding, Mang |
| Author_xml | – sequence: 1 givenname: Mang surname: Ding fullname: Ding, Mang organization: Fundamental Science on Radioactive Geology and Exploration Technology Laboratory, East China Institute of Technology, Nanchang 330013, China – sequence: 2 givenname: Yueming orcidid: 0000-0002-2717-3142 surname: Zhou fullname: Zhou, Yueming email: ymzh@iccas.ac.cn organization: Fundamental Science on Radioactive Geology and Exploration Technology Laboratory, East China Institute of Technology, Nanchang 330013, China – sequence: 3 givenname: Xizhen surname: Liang fullname: Liang, Xizhen organization: Fundamental Science on Radioactive Geology and Exploration Technology Laboratory, East China Institute of Technology, Nanchang 330013, China – sequence: 4 givenname: Hongbin surname: Zou fullname: Zou, Hongbin organization: College of Chemistry, Biology and Materials Science, East China Institute of Technology, Nanchang 330013, China – sequence: 5 givenname: Zhenzhen surname: Wang fullname: Wang, Zhenzhen organization: College of Chemistry, Biology and Materials Science, East China Institute of Technology, Nanchang 330013, China – sequence: 6 givenname: Min surname: Wang fullname: Wang, Min organization: College of Chemistry, Biology and Materials Science, East China Institute of Technology, Nanchang 330013, China – sequence: 7 givenname: Jianguo surname: Ma fullname: Ma, Jianguo organization: College of Chemistry, Biology and Materials Science, East China Institute of Technology, Nanchang 330013, China |
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| Keywords | Epinephrine Electrocatalytic oxidation Poly(brilliant cresyl blue) Nanocomposite Graphene |
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| SubjectTerms | Electrocatalytic oxidation Epinephrine Graphene Nanocomposite Poly(brilliant cresyl blue) |
| Title | An electrochemical sensor based on graphene/poly(brilliant cresyl blue) nanocomposite for determination of epinephrine |
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