Preparation method of solid phosphate ion electrode based on aluminum and aluminum phosphate

An aluminum phosphate and phosphate technology, which is applied in the field of preparation of solid phosphate electrodes, can solve the problems of large volume and difficult long-term monitoring, and achieves the effects of simple preparation method, good anti-interference and compact structure.

Inactive Publication Date: 2013-07-10
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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  • Preparation method of solid phosphate ion electrode based on aluminum and aluminum phosphate

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preparation example Construction

[0028] Based on aluminum, the preparation method steps of the solid phosphate root electrode of aluminum phosphate are as follows:

[0029] 1) Clean the aluminum 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;

[0030] Other organic solvents, such as gasoline, can also be used to remove oil stains. There is a dense and hard oxide film on the metal surface, and the oxide film is dissolved after dilute acid treatment. When the aluminum wire bubbles in the dilute acid, it indicates that the oxide film has been dissolved, and it should be taken out of the dilute acid as soon as possible and enter the next process to prevent the surface from being re-oxidized.

[0031] 2) Dissolve phosphoric acid in 5 to 10 times alcohol to prepare a phosphoric acid solution;

[0032] Alcohol is used as a solvent for phosphoric acid because the intermediate product of...

Embodiment 1

[0050] 1) Clean the aluminum wire 1 with a diameter of 0.5 mm and a length of 10 cm in acetone and dilute acid in order to remove surface oil and oxide film, then wash with deionized water and dry;

[0051] 2) Dissolve phosphoric acid in 5 times alcohol to prepare phosphoric acid solution;

[0052] 3) Use the aluminum wire as the working electrode, the graphite as the reference electrode, and the Pt sheet as the auxiliary electrode, connect them to the electrochemical workstation, immerse the above three electrodes in the phosphoric acid solution, and use the cyclic scanning potential method with a scanning rate of 50mVs -1 , potential range 0 to 1V, scanning for 8 minutes, a white aluminum phosphate 2 precipitate is formed on the surface of the aluminum wire; after the electroplating is completed, it is first soaked in alcohol, and then dried at room temperature or vacuum dried;

[0053] 4) Dissolve the following reagents from Sigma in tetrahydrofuran (THF) 10 times the total...

Embodiment 2

[0060] 1) Clean the aluminum wire 1 with a diameter of 1 mm and a length of 10 cm in acetone and dilute acid in order to remove surface oil and oxide film, then wash with deionized water and dry;

[0061] 2) Dissolve phosphoric acid in 8 times alcohol to prepare phosphoric acid solution;

[0062] 3) Use the aluminum wire as the working electrode, the graphite as the reference electrode, and the Pt sheet as the auxiliary electrode, connect them to the electrochemical workstation, immerse the above three electrodes in the phosphoric acid solution, and use the cyclic scanning potential method with a scanning rate of 80mVs -1 , with a potential range of 0 to 1V, scanning for 5 minutes, a white aluminum phosphate 2 precipitate is formed on the surface of the aluminum wire; after the electroplating is completed, it is first soaked in alcohol, and then dried at room temperature or vacuum dried;

[0063] 4) Dissolve the following reagents from Sigma in N,N-dimethylformamide (DMF) 10 t...

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Abstract

The invention discloses a preparation method of a solid phosphate electrode based on aluminum and aluminum phosphate. The preparation method comprises the following steps of 1) placing an aluminum conductor sequentially in acetone and diluted acid for washing, and drying the aluminum conductor after being washed; 2) preparing a phosphoric acid solution; 3) immersing the aluminum conductor as a working electrode, graphite as a reference electrode and a platinum (Pt) sheet as an auxiliary electrode in the phosphoric acid solution, forming white aluminum phosphate precipitate on the surface of the aluminum conductor by utilizing a cycling scanning potential method, placing the aluminum conductor in alcohol, and then airing the aluminum conductor; 4) preparing a cation screened film solution by utilizing reagent of the Sigma company; 5) utilizing the aluminum conductor which is wrapped by the aluminum phosphate to rapidly dip into the cation screened film solution, and inverting the aluminum conductor for airing; and 6) utilizing a thermoplastic pipe to wrap the middle-upper part of the aluminum conductor, which is not wrapped by the aluminum phosphate or the cation screened film to obtain the solid phosphate electrode. The solid phosphate electrode prepared by the preparation method has the advantages of low cost, high mechanical strength, high sensitivity, small size, rapid detection response, minimal detection lower limit, long service life and the like.

Description

technical field [0001] The invention relates to a method for preparing a solid phosphate root electrode based on aluminum and aluminum phosphate. 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/333
Inventor 叶瑛黄元凤殷天雅刘舒婷潘依雯陈雪刚夏枚生
Owner ZHEJIANG UNIV
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