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Method for preparation of BP (black phosphorene) modified electrode and detection of rutin

A technology for modifying electrodes and black phosphorene, applied in the direction of electrochemical variables of materials, etc., can solve the problems of poor stability, limited practical application value, easy decomposition, etc., and achieve high stability, good catalytic performance, and good electrochemical performance.

Active Publication Date: 2017-11-24
HAINAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the poor stability of BP under the conditions of oxygen, water and light, it is easy to decompose, which greatly limits its practical application value.

Method used

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  • Method for preparation of BP (black phosphorene) modified electrode and detection of rutin
  • Method for preparation of BP (black phosphorene) modified electrode and detection of rutin
  • Method for preparation of BP (black phosphorene) modified electrode and detection of rutin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 Electrochemical performance of the modified electrode

[0029] with K 3 [Fe(CN) 6 ] is an electrochemical probe, and the electrochemical performance of different electrodes is studied by cyclic voltammetry. The cyclic voltammetry curve is as follows figure 1 shown. A pair of redox peaks with good peak shape appeared on the bare GCE electrode (curve a), the redox peak currents were 15.87 μA (Ipa) and 16.10 μA (Ipc), respectively, and the peak potential difference was 90.0 mV; while in BP-PEDOT: The peak current drop on PSS / GCE is significantly enhanced (curve b), Ipa is 45.65 μA, and Ipc is 45.45 μA, which are 2.88 times and 2.82 times the peak current of the bare electrode, respectively. This is due to the accelerated [Fe(CN) 6 ] 3- / 4- the electron transfer rate.

Embodiment 2

[0030] Example 2 Solving the effective area of ​​the modified electrode

[0031] Using the Randles-Sevcik formula I pa (A)=(2.69×10 5 ) n 3 / 2 AD 1 / 2 C 0 υ 1 / 2 , where n is the electron transfer number; A is the effective area (cm 2 ); D is the diffusion coefficient of potassium ferricyanide solution (7.6×10 -6 cm s -1 ), C 0 is the concentration of potassium ferricyanide (1mmol / L), and the effective area of ​​BP-PEDOT:PSS / GCE is calculated to be 0.196 cm 2 , whose value is 8.34 times the effective area of ​​GCE (0.0235 cm 2 ), indicating that the presence of PEDOT:PSS can effectively increase the effective area of ​​the electrode, provide more active sites on the electrode surface, and improve the electrode performance.

Embodiment 3

[0032] Example 3 Research on the electrochemical behavior of rutin

[0033] In 0.1 mol / L PBS buffer solution with pH 2.5, 1.0×10 -5 The electrochemical behavior of mol / L rutin on different modified electrodes, the results are as follows figure 2 shown. On the bare GCE (curve a), rutin has a pair of redox peaks at 0.505V and 0.485V, ΔEp is 20 mV, Ipa and Ipc are 0.558 μA and 0.324 μA, respectively, indicating that rutin can realize its direct oxidation on the surface of GCE. electrochemistry. Curve b is the electrochemical behavior curve of rutin on PEDOT:PSS / GCE, Epa and Epc are located at 0.516 V and 0.493 V, ΔEp is 23 mV, Ipa and Ipc are 4.96 μA and 3.12 μA, and their values ​​are GCE 8.89 times and 9.63 times of , indicating that the presence of PEDOT:PSS accelerates the electron transfer rate of rutin on the electrode surface and improves the electrochemical response. Curve c is the electrochemical behavior curve of rutin on BP-PEDOT:PSS / GCE. 13.69 times and 16.48 t...

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Abstract

The invention discloses a method for preparation of a BP (black phosphorene) modified electrode and detection of rutin. The method comprises specific steps as follows: (1), poly(3,4-ethylenedioxythiophene) / polystyrene sulfonate (PEDOT:PSS) is taken as a protective agent and mixed with BP, and a BP-PEDOT:PSS composite material is prepared; (2), the BP-PEDOT:PSS composite material prepared in the step (1) is applied to the surface of a glassy carbon electrode (GCE) through coating and is air-dried, and the modified electrode BP-PEDOT:PSS / GCE is obtained; (3), electrochemical behaviors of rutin are researched by utilizing BP-PEDOT:PSS / GCE as a working electrode, and electrochemical parameters of related electro-catalytic reactions are calculated; (4), an electrochemical sensitivity detection method of rutin is established with differential pulse voltammetry, linear ranges are 0.02-15.0 mu mol / L and 15.0-80.0 mu mol / L, and limit of detection is 0.007 mu mol / L (3sigma). The modified electrode is successfully applied to determination of rutin tablet samples.

Description

technical field [0001] The invention specifically relates to a method for preparing a black phosphorene modified electrode and detecting rutin, and belongs to the field of chemically modified electrodes and electrochemical sensors. Background technique [0002] Black phosphorus (black phosphorus) is an allotrope of phosphorus, which was first prepared by Bridgman in 1914 by high-pressure method, which opened the prelude to the research on the physical properties and applications of black phosphorus. Due to the advantages of high carrier mobility, good current saturation characteristics and planar anisotropy, black phosphorus has a good application prospect in the fields of electronics and optoelectronics. Compared with black phosphorus, two-dimensional black phosphorene (BP, black phosphorene) has higher specific surface area, excellent mechanical properties and electrical properties, so it has good application prospects in photoelectrochemistry, batteries, sensors and other...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/48
CPCG01N27/30G01N27/48
Inventor 孙伟牛学良翁文举殷春晓谢慧门永玲
Owner HAINAN NORMAL UNIV
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