Method for preparing novel residual chlorine detecting electrode

A technology for detecting electrodes and residual chlorine, applied in the field of electrodes, can solve the problems of poor accuracy, inappropriate on-line detection, time-consuming and labor-intensive, etc.

Inactive Publication Date: 2006-01-04
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional methods for residual chlorine determination include: titration (such as arsenous acid titration, etc.), spectrophotometry (such as DPD spectrophotometry, etc.), they are all laboratory methods...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: immerse the newly processed base electrode (this electrode is polished, cleaned, activated (anodized in 0.1Ml phosphoric acid, potential+1.2V)) in the perchloric acid solution containing 1mM chloroauric acid, perchloric acid The concentration is 0.1M, and the three-step step potential method is used for polarization treatment: 1, 0V, 10s; 2, -0.3V, 60s; 3, 0V, 30s. The electrode is taken out, rinsed with water, and dried with an infrared lamp to obtain a modified electrode deposited with gold nanoparticles.

Embodiment 2

[0015] Embodiment 2: Immerse the newly processed substrate electrode (conditions are the same as in Example 1) in the perchloric acid solution containing 2mM chloroauric acid, the concentration of perchloric acid is 0.1M, and adopt three-step step potential method polarization treatment : One, 0V, 10s; Two, -0.3V, 30s; Three, 0V, 60s. The electrode is taken out, rinsed with water, and dried with an infrared lamp to obtain a modified electrode deposited with gold nanoparticles.

Embodiment 3

[0016] Embodiment 3: Immerse the newly processed base electrode (conditions are the same as in Example 1) in the perchloric acid solution containing 5mM chloroauric acid, the concentration of perchloric acid is 0.1M, and adopt three-step step potential method polarization treatment : One, 0.1V, 10s; Two, -0.2V, 30s; Three, 0.1V, 30s. The electrode is taken out, rinsed with water, and dried with an infrared lamp to obtain a modified electrode deposited with gold nanoparticles.

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PUM

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Abstract

The preparation process of novel residual chlorine detecting electrode includes selecting glass-carbon electrode, gold electrode, platinum electrode or graphite electrode as base electrode, and platinum filament as counter electrode, and saturated calomel electrode or silver/silver chloride electrode as reference electrode; soaking surface pre-treated base electrode in 0.1 M concentration perchloric acid solution containing 1-5mM concentration aurochlorohydric acid at room temperature; and three-step step potential process to obtain stable nanometer gold particle modified electrode. The obtained nanometer gold particles of 50-150 nm diameter are arranged compactly and orderedly on the surface of the base electrode. The modified electrode has excellent catalytic performance on the electrochemical reduction reaction of residual chlorine and the electrochemical reduction reaction of chlorine dioxide and dissolved oxygen.

Description

technical field [0001] The invention relates to an electrode, in particular to a preparation method for modifying gold nanoparticles on the surface of a base electrode. Background technique [0002] The use of chlorine preparations (chloramine, chlorine gas, hypochlorite, etc.) to disinfect and sterilize drinking water and industrial cooling water is a recognized technology widely used at home and abroad. For drinking water, it is mainly to kill infectious bacteria to protect people's health; for cooling water, it is mainly to kill microorganisms to ensure the good working condition of the heat exchange system. Residual chlorine refers to the remaining total amount of chlorine (active chlorine, OCl - And organic chlorine, chlorine was positive). The sterilization and disinfection effectiveness of chlorine preparations depends only on the residual chlorine concentration. In order to strictly monitor the water quality, the urban sanitation and epidemic prevention department...

Claims

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Application Information

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IPC IPC(8): G01N27/30
Inventor 邓群山郭琦龙辜志俊
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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