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

A technology of rare earth carbonates and carbonates, which is applied to the electrochemical variables of materials, material analysis through electromagnetic means, and measurement devices, which can solve problems such as deviations between calculation results and actual conditions, and achieve easy integration and use, and simple preparation methods , the effect of compact structure

Inactive Publication Date: 2013-12-25
ZHEJIANG UNIV
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  • Abstract
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  • 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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  • Metal/rare earth carbonate-based solid carbonate electrode and preparation method thereof

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preparation example Construction

[0032] The steps of the preparation method of the solid carbonate electrode based on metal / rare earth carbonate are as follows:

[0033] 1) Clean the metal wire 1 with a diameter of 0.5 to 1 mm and a length of 5 to 15 cm in acetone and dilute acid in order to remove surface oil and oxide film, then wash with deionized water and dry;

[0034] 2) Dissolving soluble carbonate in water to prepare a soluble carbonate solution with a concentration of 3% to 10% by mass;

[0035] 3) The metal wire is used as the working electrode, that is, the anode, the graphite is used as the reference electrode, and the Pt sheet is used as the auxiliary electrode, that is, the cathode, connected to the electrochemical workstation, and the above three electrodes are immersed in the soluble carbonate solution. Sweep potentiometric method with a scan rate of 30 to 80mVs -1 , the potential range is 0 to 1V, scanning 1 to 10 cycles, metal carbonate precipitation is formed on the surface of the wire; af...

Embodiment 1

[0050]1) Clean the silver wire 1 with a diameter of 0.5 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;

[0051] 2) Potassium carbonate is dissolved in water to prepare a potassium carbonate solution with a mass percentage concentration of 3%;

[0052] 3) Take the silver wire 1 as the working electrode (anode), the graphite as the reference electrode, and the Pt sheet as the auxiliary electrode (cathode), connect it to the electrochemical workstation, immerse the above three electrodes in the carbonic acid solution, and use the cyclic scanning potential method with a scan rate of 50mVs -1 , with a potential range of 0 to 1V, scanning for 8 cycles, forming a silver carbonate 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;

[0053] 4) Dissolving lanthanum trichlori...

Embodiment 2

[0062] 1) Clean the cadmium wire 1 with a diameter of 0.5 mm and a length of 10 cm in acetone and dilute nitric acid in order to remove surface oil and oxide film, then wash with deionized water and dry;

[0063] 2) Sodium bicarbonate is dissolved in water to prepare a sodium bicarbonate solution with a concentration of 10% by mass;

[0064] 3) Use cadmium wire 1 as the working electrode (anode), graphite as the reference electrode, and Pt sheet as the auxiliary electrode (cathode), connect it to the electrochemical workstation, immerse the above three electrodes in the carbonic acid solution, and use cyclic scanning potential method with a scan rate of 50mVs -1 , with a potential range of 0 to 1V, scanning for 5 cycles, forming a cadmium carbonate precipitate on the surface of the cadmium wire 1; washing with water after the electroplating is completed, and then drying at room temperature or vacuum drying;

[0065] 4) Dissolving yttrium nitrate in water to prepare a solution...

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Abstract

The invention discloses a metal / rare earth carbonate-based solid carbonate electrode and a preparation method thereof. The metal / rare earth carbonate-based solid carbonate electrode comprises a metal 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 metal 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 metal wire and the upper part of the cation shielding film. The metal / 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 metal / rare earth carbonate-based solid carbonate electrode and a preparation method thereof. Background technique [0002] The content of carbonate ions in water is an important parameter for environmental assessment, and it 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 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. Therefore, there is an objective need for a sensor capable of in-situ detection of the content of carbonate ions in natural water bodies, and the present invention proposes an electrode for detecting the conten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/333
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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