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Preparation method of porous nanometer crystal electrodes and application of porous nanometer crystal electrodes

A technology of electrodes and nanocrystals, applied in the field of electrochemistry, to achieve the effects of convenient operation, good treatment effect and mild reaction conditions

Inactive Publication Date: 2012-10-03
BEIJING NORMAL UNIVERSITY
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  • Abstract
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Problems solved by technology

[0004] So far, there is no report on the high-efficiency mineralization and purification technology of PFOA in water by electrochemistry

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  • Preparation method of porous nanometer crystal electrodes and application of porous nanometer crystal electrodes
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  • Preparation method of porous nanometer crystal electrodes and application of porous nanometer crystal electrodes

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Embodiment Construction

[0016] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0017] A method for electrochemically oxidizing and efficiently mineralizing perfluorooctanoic acid in water according to the present invention, and its preferred specific implementation method includes steps:

[0018] Porous nanocrystalline Ti / SnO 2 -Sn / Ce-PbO 2 Electrode preparation:

[0019] ① First, polish the Ti substrate with 200-mesh sandpaper, then immerse it in 8% sodium hydroxide solution at 100°C for 1 hour, take it out and wash it with distilled water, and then etch it in 10% oxalic acid solution at 100°C for 2.5 hours;

[0020] ② Dissolve a certain amount of citric acid in ethylene glycol at a temperature of 60°C, keep the temperature for 30 minutes after complete dissolution, then heat to 90°C, add SnCl 4 ·5H 2 O and SbCl 3 , stir well until the dissolution is complete, then raise the temperature to 100°C and keep the tempera...

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Abstract

The invention discloses a preparation method of porous nanometer crystal Ti / SnO2-Sn / Ce-PbO2 electrodes and a method for using the porous nanometer crystal Ti / SnO2-Sn / Ce-PbO2 electrodes for degrading and mineralizing perfluoro caprylic acid in water, and belongs to the technical field of electrochemistry. Waste water containing perfluoro caprylic acid is subjected to electrolytic oxidation treatment by using the porous nanometer crystal Ti / SnO2-Sn / Ce-PbO2 electrodes as anodes and Ti or 304 stainless steel as cathodes. The method is characterized in that the perfluoro caprylic acid can be efficiently mineralized under the mild condition. An electrochemical oxidation method is adopted, the technical flow process is simple, the operation is convenient, the reaction condition is mild, the treatment effect is good, in addition, stability and reliability are realized, and the industrial application is easy to realize. The adopted porous nanometer crystal Ti / SnO2-Sn / Ce-PbO2 electrodes have the advantages that the oxidation capacity is high, the service life is long, the processing is easy, the cost is low, and the like.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a preparation method of a porous nanocrystal electrode and a method for electrochemically oxidizing and efficiently mineralizing perfluorooctanoic acid in water. Background technique [0002] Perfluorooctanoic acid (PFOA, C7F15COOH) has been produced and used for more than fifty years as a surfactant, antifouling agent, additive, foam fire extinguishing agent, polymer emulsifier and insecticide. As one of the main destinations of perfluorinated compounds (PFCs) in the environment, perfluorooctanoic acid is widely present in natural water bodies, sediments, animals and human bodies due to its stable chemical properties, non-volatile and non-degradable characteristics of the ecosystem. Threats to the ecological environment and human health. At present, global PFOA pollution and its impact on human health have attracted great attention from governments and the ...

Claims

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Application Information

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IPC IPC(8): C02F1/46C02F101/36
Inventor 牛军峰林辉
Owner BEIJING NORMAL UNIVERSITY
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