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Preparation method of L-cysteine modified nano-gold porous membrane electrode

A technology of cysteine ​​and nano-gold, which is applied in the field of preparation of L-cysteine-modified nano-gold porous membrane electrodes, and achieves the effect of simple preparation method

Inactive Publication Date: 2015-05-27
白晓东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no report on the preparation of nanoporous gold membranes on ITO substrates

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] A sort of L -The preparation method of cysteine-modified nano-gold hole membrane electrode adopts the following steps:

[0020] Step 1: Preparation of nano-gold-silver alloy membrane electrode:

[0021] Divide the ITO conductive glass into a rectangle of 4.0cm×0.5cm, and then use dilute ammonia water

[0022] , anhydrous ethanol, and sub-boiling water for 10 min, and then cyclic voltammetry was used to deposit gold-silver alloy nanofilms.

[0023] Step 2: Preparation of Nanoporous Gold Membrane Electrode:

[0024] Soak the prepared gold-silver alloy nano-membrane electrode in HClO 4 solution, take it out after 12 hours, and place it in an oven for 1 hour to prepare a nanoporous gold film electrode.

[0025] Step 3: Preparation of L-cysteine ​​modified gold nanoporous membrane electrode:

[0026] Soak the prepared nanoporous gold film electrode in 1 mmol / L L -In the aqueous solution of cysteine, store it in the refrigerator at 4°C for about 2 hours, take it out...

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Abstract

The invention relates to the technical field of preparation of analytical chemical materials, and in particular relates to a preparation method of an L-cysteine modified nano-gold porous membrane electrode. The preparation method of the L-cysteine modified nano-gold porous membrane electrode comprises the following steps: scratching ITO conductive glass to be of a rectangle with the size of 4.0*0.5cm; ultrasonically cleaning for 10 minutes by sequentially using diluted ammonia water, absolute ethyl alcohol and sub-boiling water; depositing a gold-silver alloy nano-membrane by means of cyclic voltammetry; soaking the prepared gold-silver alloy nano-membrane into HClO4 solutions; taking out after 12 hours; keeping the processed gold-silver alloy nano-membrane to stand for 1 hour in a drying oven to prepare the nano-gold porous membrane electrode; soaking the nano-gold porous membrane electrode into L-cysteine aqueous solutions with the concentration of 1mmol / L; storing for 2 hours in refrigerator being 4 DEG C; and cleanly washing and blowing by using high-purity nitrogen to prepare the L-cysteine modified nano-gold porous membrane electrode. By adopting electrochemical deposition of gold-silver alloys and a dealloying method, the nano-gold porous membrane is prepared on the surface of the ITO electrode, the preparation method of the electrode is simple, and a porous membrane structure and a superficial area can be controlled by an electro-depositional condition.

Description

technical field [0001] The invention relates to the technical field of preparation of analytical chemical materials, in particular to a preparation method of an L-cysteine ​​modified nano-gold hole membrane electrode. Background technique [0002] In recent years, due to the large specific surface area and good chemical stability of nanoporous gold membranes, it has aroused widespread interest in catalysis, sensors and fuel cells. It is usually prepared by dealloying method. Firstly, a gold-containing bimetallic alloy is prepared, such as Au-Ag, Au-zn, etc., and then the more active metal is selectively removed by chemical or electrochemical methods to obtain nanoporous gold. [0003] In catalytic and electrochemical applications, nanoporous gold needs to be fixed on solid substrates, such as gold electrodes, glassy carbon electrodes and silicon substrate surfaces. The main methods of preparation are: gold substrate corrosion method, direct bonding method and deposit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30B82Y40/00
Inventor 白晓东
Owner 白晓东