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Rare earth/rare earth carbonate-based solid carbonate electrode and preparation method thereof

A rare earth carbonate and carbonate technology, which is applied in the direction of material analysis, measuring devices, and instruments by electromagnetic means, can solve the problems of deviation between calculation results and actual conditions, and achieve good anti-interference, compact structure, and preparation method. easy 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, the content of carbonate ions in seawater is usually calculated based on parameters such as the pH value and alkalinity of the water body or dissolved inorganic carbon. Indirect calculations inevitably introduce assumptions and simplifications, which lead to deviations between calculation results and actual conditions.

Method used

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  • Rare earth/rare earth carbonate-based solid carbonate electrode and preparation method thereof

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preparation example Construction

[0027] The steps of the preparation method of the solid carbonate electrode based on rare earth / rare earth carbonate are as follows:

[0028] 1) Rare earth wires 1 with a diameter of 0.5 to 1 mm and a length of 5 to 15 cm are washed sequentially in acetone and dilute acid to remove oil stains and oxide films on the surface, and then washed with deionized water and dried;

[0029] 2) The soluble carbonate solution is prepared by dissolving soluble carbonate in 5 to 10 times the water;

[0030] 3) Take the rare earth wire 1 as the working electrode, namely the anode, graphite as the reference electrode, and the Pt sheet as the auxiliary electrode, namely the cathode, connected to the electrochemical workstation, and immerse the above three electrodes in the soluble carbonate solution. Cyclic scanning potential method, scanning rate is 30 to 80mVs -1 , The potential range is 0 to 1V, scanning 1 to 10 cycles, the formation of rare earth carbonate 2 precipitation on the surface of the rar...

Embodiment 1

[0041] 1) The yttrium wire 1 with a diameter of 0.5 mm and a length of 10 cm is washed sequentially in acetone and dilute acid to remove the surface oil and oxide film, and then washed with deionized water and dried;

[0042] 2) Dissolve potassium carbonate in 5 times the water to prepare a potassium carbonate solution;

[0043] 3) Use the yttrium wire 1 as the working electrode (anode), graphite as the reference electrode, and the Pt sheet as the auxiliary electrode (cathode), connected to the electrochemical workstation, immerse the above three electrodes in the carbonic acid solution, and use the cyclic scanning potential Method, the scan rate is 50mVs -1 , The potential range is 0 to 1V, scanning 8 cycles, forming yttrium carbonate 2 precipitation on the surface of yttrium wire 1; washing with water after plating is completed, and then drying at room temperature or vacuum drying;

[0044] 4) Dissolve the following reagents in tetrahydrofuran (THF) 10 times the total weight of the...

Embodiment 2

[0051] 1) The scandium wire 1 with a diameter of 1 mm and a length of 10 cm is washed sequentially in acetone and dilute acid to remove the surface oil and oxide film, then washed with deionized water and dried;

[0052] 2) Dissolve sodium bicarbonate in 8 times the amount of water to prepare a sodium bicarbonate solution;

[0053] 3) Using scandium wire 1 as the working electrode (anode), graphite as the reference electrode, and Pt sheet as the auxiliary electrode (cathode), connect to the electrochemical workstation, immerse the above three electrodes in the carbonic acid solution, and use the cyclic scanning potential Method, the scan rate is 80mVs -1 , The potential range is 0 to 1V, scanning for 5 cycles, the formation of scandium carbonate 2 precipitates on the surface of scandium wire 1; washing with water after plating is completed, and then drying at room temperature or vacuum drying;

[0054] 4) Dissolve the following reagents in 10 dimethylformamide (DMF), the total weight...

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Abstract

The invention discloses a rare earth / rare earth carbonate-based solid carbonate electrode and a preparation method thereof. The rare earth / rare earth carbonate-based solid carbonate electrode comprises a rare earth wire, a rare earth carbonate, a cation shielding film and a heat-shrinkable tube, wherein a rare earth carbonate layer is electroplated on the lower surface of the rare earth wire in an in-situ mode; the cation shielding film is coated on the external surface of the rare earth carbonate; and the heat-shrinkable tube is coated on the middle part of the rare earth wire and the upper part of the cation shielding film. The rare earth / rare earth carbonate-based solid carbonate 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 carbonate ion content in seawater, culture water and chemical and chemical engineering water media.

Description

Technical field [0001] The invention relates to a solid carbonate electrode based on rare earth / rare earth carbonate and a preparation method thereof. Background technique [0002] The content of carbonate ions in water bodies is an important parameter for environmental assessment, which is of great significance for understanding the activities of aquatic organisms and microorganisms, as well as the carbon cycle between the hydrosphere and the atmosphere. At present, the content of carbonate ions in seawater is usually calculated based on the pH and alkalinity of the water or dissolved inorganic carbon. Indirect calculations inevitably introduce assumptions and simplifications, which leads to deviations between the calculation results and the actual situation. Therefore, there is an objective need for a sensor capable of in-situ detection of carbonate ion content in natural water. The present invention provides an electrode for detecting carbonate ion content in water to meet thi...

Claims

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Application Information

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