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Silver/metal phosphate-based solid phosphate electrode and preparation method thereof

A technology of metal phosphate and phosphate root, which is applied in the direction of material analysis, measuring devices, and instruments through electromagnetic means, which can solve the problems of large volume and difficult long-term monitoring, and achieves simple preparation methods, good anti-interference performance, and compact structure Effect

Inactive Publication Date: 2013-12-25
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, most of the commonly used phosphate detection electrodes are liquid film electrodes, which are relatively large and fragile, and are difficult to use for online observation and long-term monitoring in the actual environment.

Method used

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  • Silver/metal phosphate-based solid phosphate electrode and preparation method thereof

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preparation example Construction

[0032] The steps of the preparation method of the solid phosphate electrode based on silver / metal phosphate are as follows:

[0033] 1) Clean the silver wire 1 with a diameter of 0.5 to 1 mm and a length of 5 to 15 cm in acetone and dilute hydrochloric acid in order to remove surface oil and oxide film, then wash with deionized water and dry; oil removal can also be done Use other organic solvents, such as gasoline. There is a dense and hard oxide film on the metal surface, and the oxide film is dissolved after dilute hydrochloric acid treatment. When the silver wire 1 bubbles in the dilute hydrochloric acid, it indicates that the oxide film has been dissolved, and it should be taken out of the dilute hydrochloric acid as soon as possible and enter the next process to prevent the surface from being re-oxidized.

[0034] 2) Soluble phosphate solution is prepared by dissolving soluble phosphate in 5 to 10 times of water; the soluble phosphate is one or more of K or Na phosphate...

Embodiment 1

[0046] 1) Clean the silver wire 1 with a diameter of 0.5 mm and a length of 5 cm in acetone and dilute hydrochloric acid in order to remove surface oil and oxide film, then wash with deionized water and dry;

[0047]2) Dissolve tripotassium phosphate in 5 times of water to make tripotassium phosphate solution;

[0048] 3) Take silver wire 1 as the working electrode (anode), graphite as the reference electrode, and Pt electrode as the auxiliary electrode (cathode), connect it to the electrochemical workstation, immerse the above three electrodes in the solution, and use the cyclic scanning potential method , scan rate is 50mVs -1 , with a potential range of 0 to 1V, scanning for 8 cycles, forming silver phosphate precipitates on the surface of the silver wire 1; washing with water after the electroplating is completed, and then drying at room temperature or vacuum drying;

[0049] 4) Dissolve copper acetate (copper acetate) in water to prepare a solution with a concentration o...

Embodiment 2

[0058] 1) Clean the silver wire 1 with a diameter of 1 mm and a length of 10 cm in acetone and dilute hydrochloric acid in order to remove surface oil and oxide film, then wash with deionized water and dry;

[0059] 2) Dissolve trisodium phosphate in 8 times of water to make trisodium phosphate solution;

[0060] 3) Take silver wire 1 as the working electrode (anode), graphite as the reference electrode, and Pt electrode as the auxiliary electrode (cathode), connect it to the electrochemical workstation, immerse the above three electrodes in the solution, and use the cyclic scanning potential method , scan rate is 80mVs -1 , with a potential range of 0 to 1V, scanning for 5 cycles, forming a silver phosphate precipitate on the surface of the silver wire 1; washing with water after the electroplating is completed, and then drying at room temperature or vacuum drying;

[0061] 4) Dissolve lead formate in water to prepare a solution with a concentration of 0.1 mol / liter;

[006...

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Abstract

The invention discloses a silver / metal phosphate-based solid phosphate electrode and a preparation method thereof. The silver / metal phosphate-based solid phosphate electrode comprises a silver wire, a metal phosphate, a cation shielding film and a heat-shrinkable tube, wherein a metal phosphate layer is electroplated on the lower surface of the silver wire in an in-situ mode; the cation shielding film is coated on the external surface of the metal phosphate; and the heat-shrinkable tube is coated on the middle part of the silver wire and the upper part of the cation shielding film. The silver / metal phosphate-based solid phosphate electrode has the advantages of high mechanical strength, high toughness, high sensitivity, small size, quick detection response, low detection lower limit, long service life and the like, is matched with a solid reference electrode, and is suitable for performing on-line detection and long-term in-situ monitoring on the phosphate ion content in seawater, culture water, industrial cycle cooling water and boiler water.

Description

technical field [0001] The invention relates to a silver / metal phosphate-based solid phosphate electrode and a preparation method thereof. Background technique [0002] Phosphoric acid and phosphate are commonly used food, chemical, and pharmaceutical raw materials, and are also important components of organisms and essential nutrients for life. The increase in the concentration of phosphate in the water environment will cause eutrophication of the water body and stimulate the growth of harmful algae. Harm to the ecological environment. Monitoring the concentration of phosphate in water is one of the main contents of ecological environment protection and environmental restoration. At present, most of the commonly used phosphate detection electrodes are liquid film electrodes, which are large in size and fragile, and are difficult to use in the actual environment for online observation and long-term monitoring. Contents of the invention [0003] The purpose of the present...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/333
Inventor 叶瑛黄元凤贾健君殷天雅秦华伟张斌潘依雯陈雪刚夏枚生
Owner ZHEJIANG UNIV
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