Dissolved hydrogen sulfide detection electrode based on silver/nano silver and preparation method for dissolved hydrogen sulfide detection electrode

A detection electrode and nano-silver technology, which is applied in the field of electrochemical detection, can solve the problems of difficult integration of micro sensors and large electrode volume, and achieve the effects of low detection limit, small size and long service life

Inactive Publication Date: 2012-06-20
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of electrode is bulky and difficult to be integrated into a miniature sensor; the glass casing of a commercial electrode predestined it to be used only in a laboratory environment

Method used

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  • Dissolved hydrogen sulfide detection electrode based on silver/nano silver and preparation method for dissolved hydrogen sulfide detection electrode
  • Dissolved hydrogen sulfide detection electrode based on silver/nano silver and preparation method for dissolved hydrogen sulfide detection electrode
  • Dissolved hydrogen sulfide detection electrode based on silver/nano silver and preparation method for dissolved hydrogen sulfide detection electrode

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Experimental program
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Effect test

preparation example Construction

[0022] The steps of the preparation method of the dissolved hydrogen sulfide detection electrode based on silver / nano-silver are as follows:

[0023] 1) Polish the surface of the first silver wire 1 with a length of 5-15 cm with corundum powder, then wash it with 1-2M dilute hydrochloric acid or dilute nitric acid, rinse it with deionized water, and then dry it;

[0024] 2) Adjust the function signal generator 8 to make it generate a sine wave function signal with a peak value of 600-1000mV and a frequency of 50Hz; then the anode of the output voltage of the function signal generator 8 is connected to the anode of the diode 7, and the cathode of the diode 7 Connect with the signal channel of the oscilloscope, and observe the oscilloscope graph, which shows that the obtained power supply is a half-sine wave carrier DC power supply with a peak value of 450-800mV and a frequency of 50HZ;

[0025] 3) Connect one end of the polished and cleaned first silver wire 1 to the negative e...

Embodiment 1

[0030] 1) Polish the surface of the first silver wire 1 with a length of 5 cm with corundum powder, then wash it with 1M dilute hydrochloric acid or dilute nitric acid, rinse it with deionized water, and then dry it;

[0031] 2) Adjust the function signal generator 8 (Rite Electronics SG1005A) to generate a sine wave function signal with a peak value of 600 mV and a frequency of 50 Hz; then connect the negative pole of the output voltage of the function signal generator 8 (Rite Electronics SG1005A) The cathode of diode 7 (Schottky diode MBR1045) is connected, and the anode of diode 7 (Schottky diode MBR1045) is connected to the signal channel of the oscilloscope (Tektronix TDS1002). Observing the oscilloscope graph shows that the obtained power is 450mV in peak value. Half sine wave carrier DC power supply with a frequency of 50HZ;

[0032] 3) Connect one end of the polished and cleaned first silver wire 1 to the anode of the diode 7 (Schottky diode MBR1045) through a wire, an...

Embodiment 2

[0036] 1) Polish the surface of the first silver wire 1 with a length of 15 cm with corundum powder, then wash it with 2M dilute hydrochloric acid or dilute nitric acid, rinse it with deionized water, and then dry it;

[0037]2) Adjust the function signal generator 8 (Rite Electronics SG1005A) to generate a sine wave function signal with a peak value of 1000mV and a frequency of 50Hz; The positive poles of 7 (Schottky diode MBR1045) are connected, and the negative poles of diode 7 (Schottky diode MBR1045) are connected with the signal channel of the oscilloscope (Tektronix TDS1002). Observe the oscilloscope graph, which shows that the obtained power is 800mV in peak value and the frequency 50HZ half sine wave carrier DC power supply;

[0038] 3) Connect one end of the polished and cleaned first silver wire 1 to the negative electrode of the output voltage of the function signal generator 8 (Rite Electronics SG1005A) through a wire, and connect one end of the second silver wire...

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Abstract

The invention discloses a dissolved hydrogen sulfide detection electrode based on silver / nano silver and a preparation method for the dissolved hydrogen sulfide detection electrode. The dissolved hydrogen sulfide detection electrode based on the silver / nano silver is provided with a first silver wire, wherein a nanoparticle metal silver particle layer is coated on a lower surface of the first silver wire; an Ag2S sensitive film is coated on a surface layer of the metal silver particle layer; an insulating layer is coated on the upper part of the Ag2S sensitive film; and the insulating layer is formed by cladding a shrinkable tube or coating an insulating paint. The electrode has the advantages of fast detection response, high sensitivity, extremely low detection lower limit, long service life and the like. The Ag / Ag2S electrode has wide application ranges in the fields of on-line detection, long-term monitoring and the like of geologic processes and natural environments in high-temperature, high-pressure, high radioactivity, strong acid and other extreme detection environments.

Description

technical field [0001] The invention relates to electrochemical detection technology, in particular to a silver / nanometer silver-based dissolved hydrogen sulfide detection electrode and a preparation method thereof. Background technique [0002] The detection of dissolved hydrogen sulfide content in aqueous fluid is mature in theory and technology in the field of electrochemistry, usually based on Ag / Ag 2 S is the working electrode, Ag / AgCl is the reference electrode, and the dissolved hydrogen sulfide content in the medium has a simple functional relationship with the potential difference between the electrode pair. Commodity Ag / Ag 2 The S electrode is made of silver powder pressed into a sheet, with its own internal reference electrolyte. This kind of electrode is bulky and difficult to be integrated into a miniature sensor; the glass casing of a commercial electrode predestined it to be used only in a laboratory environment. [0003] The content of dissolved hydrogen s...

Claims

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Application Information

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IPC IPC(8): G01N27/30
Inventor 叶瑛丁茜潘依雯陈雪刚夏枚生张海燕
Owner ZHEJIANG UNIV
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