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Method for determining electron transfer rate of liquid/liquid interface

A technology of electron transfer and liquid interface, applied in the direction of material electrochemical variables, etc., can solve the problems of labor and material waste, achieve the effect of simplifying the experimental procedure, promoting further development, and simple measurement process

Inactive Publication Date: 2011-09-21
NORTHWEST NORMAL UNIVERSITY
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Problems solved by technology

However, in actual measurement, it is often a waste of effort to explore the optimal experimental conditions.

Method used

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  • Method for determining electron transfer rate of liquid/liquid interface
  • Method for determining electron transfer rate of liquid/liquid interface
  • Method for determining electron transfer rate of liquid/liquid interface

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Embodiment Construction

[0035] In order to illustrate content of the present invention more clearly, below in conjunction with accompanying drawing to measure 7,7,8,8-tetracyanide dimethylbenzoquinone and potassium ferrocyanide (TCNQ-K 4 Fe(CN) 6 ) system in the organic phase is nitrobenzene (NB) water phase as an example for the electron transfer rate on the water interface, and the present invention is further described:

[0036] The programmed program is completed by MATLAB language, and the operating environment is windows XP. The instruments and reagents used in the experiment include: quartz tube heating type automatic double pure water distiller (1810B, Shanghai Asia-Pacific Technology Glass Co.), pyrolytic graphite electrode (Shanghai Chenhua Instrument Co., Ltd.) with a diameter of 0.64 cm, and the working system It is a three-electrode system, using Ag / AgCl (saturated KCl) as reference electrode, and Pt wire (0.5mm) as counter electrode. Nitrobenzene (NB, Shanghai Chemical Reagent Company...

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Abstract

The invention provides a method for determining the electron transfer rate of a liquid / liquid interface, and the method comprises the following steps: through combining a computer simulation method with a thin-layer cyclic voltammetry, based on the liquid / liquid interface electron transfer theory of the thin-layer cyclic voltammetry, carrying out simulation and forecasting on a thin-layer cyclic voltammetry model through numerical simulation firstly so as to obtain the optimal experiment condition parameter; then, applying the optimal experiment condition to a specific experimental operation so as to obtain a series of ideal cathode platform current values; and finally, carrying out linear fitting on the cathode platform current values so as to obtain the precise constant value of the electron transfer rate of the liquid / liquid interface. In the method disclosed by the invention, the optimal experiment condition is determined by taking computer simulation as the guide and then applied to the specific experimental operation, therefore, the method disclosed by the invention is a new operable method which integrates the advantages of the computer simulation method and the thin-layer cyclic voltammetry, therefore, by using the method, the determination on the electron transfer rate of the liquid / liquid interface is more convenient, quick and accurate.

Description

technical field [0001] The invention belongs to a method for measuring liquid / liquid interface electron transfer rate. Background technique [0002] Since the liquid / liquid interface can be regarded as a simple model for simulating biological membranes or artificial membranes, studying the electron transfer process on it is of great significance for understanding the complex physiological change process of organisms. The methods for studying the liquid / liquid interface mainly include: microtube technology, spectroelectrochemical method, droplet electrochemical method, scanning electrochemical microscopy (SECM), thin layer cyclic voltammetry (TLCV), second harmonic generation method ( SHG) and total frequency generation method (SFG), etc. As a new experimental method, SECM solves many problems that cannot be solved by traditional electrochemical methods, such as IR drop, charging current, and distinguishes between electron transfer and ion transfer processes. However, SECM ...

Claims

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Application Information

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IPC IPC(8): G01N27/48G01N27/30G01N27/38
Inventor 卢小泉张韶华董德芳姚冬娜何勇
Owner NORTHWEST NORMAL UNIVERSITY
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