Lanthanum-gadolinium co-doping titanium-based lead dioxide electrode and preparation method and application thereof

A technology of lead dioxide and co-doping, which is applied in chemical instruments and methods, liquid chemical plating, and plating of superimposed layers, etc. It can solve the problems of electropoisoning, poor treatment effect, and difficult to degrade pollutants, etc. , to achieve mild conditions, save daily maintenance, and save equipment investment costs

Active Publication Date: 2013-06-05
ZHEJIANG UNIV OF TECH
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Problems solved by technology

In the 1940s, due to technical constraints such as electricity and materials, traditional industrial wastewater was often treated with physical and chemical methods, biochemical methods, etc., and it was difficult to truly achieve the purpose of degrading such pollutants.
Although new lead d

Method used

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  • Lanthanum-gadolinium co-doping titanium-based lead dioxide electrode and preparation method and application thereof
  • Lanthanum-gadolinium co-doping titanium-based lead dioxide electrode and preparation method and application thereof
  • Lanthanum-gadolinium co-doping titanium-based lead dioxide electrode and preparation method and application thereof

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Embodiment 1

[0042] The electrode preparation method is as follows:

[0043] (1) Coarsening treatment of Ti substrate: Ti sheet (3*7.5cm 2 ) was sanded and rounded with sandpaper, soaked in NaOH solution (mass fraction 40%) for 30min, washed with water, and then kept at 60°C for H 2 SO 4 Soak in solution (mass fraction: 20%) for 20min, wash with water, and finally treat in oxalic acid solution (mass fraction: 15%) at 80°C for 3h. After washing with water, the coarsened titanium sheet was obtained, which was gray and pitted, and placed in 1wt% oxalic acid for later use.

[0044] (2) Thermally decompose the bottom layer of tin antimony oxide: evenly coat the PPM precursor coating solution on the surface of the roughened Ti base, first bake it in a tubular electric furnace at a constant temperature of 130°C for 25 minutes, and then raise the temperature of the electric furnace to Bake at 500°C for 15 minutes at a constant temperature to complete one cycle, and repeat the aforementioned cyc...

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Abstract

The invention provides a preparation method of a lanthanum-gadolinium co-doping titanium-based lead dioxide electrode. Rough processing is carried out on the surface of a titanium-based body, a tin antimony oxide bottom layer is prepared in a plating mode through a thermal decomposition method, then an alpha-PbO2 layer is electroplated in an alkalinity mode, finally a beta-PbO2 layer containing rare-earth metal oxide is electroplated in an acidity mode, and the lanthanum-gadolinium co-doping titanium-based lead dioxide electrode is prepared. Through the co-doping of the lanthanum and the gadolinium, a certain synergistic effect is achieved, the provided electrode can process and degrade organic matters under the normal temperature and the normal pressure, processing effect is good, cost is low, and good application value is achieved.

Description

(1) Technical field [0001] The invention relates to a novel titanium-based lead dioxide electrode co-doped with lanthanum and gadolinium, a preparation method and application thereof. (2) Background technology [0002] With the development of the economy, the number and types of refractory organic compounds in industrial wastewater are increasing day by day. These toxic and harmful high-concentration refractory organic wastewater has always restricted the sustainable development of my country's chemical, pharmaceutical, printing and dyeing, papermaking and other industries. It also affects the normal life and physical and mental health of the people. A large amount of industrial wastewater discharged by these industries has the characteristics of complex components, various types, difficult biochemical degradation, high chemical oxygen demand, toxic and harmful, and some are even teratogenic, carcinogenic, and mutagenic "three-cause" pollutants. Without effective control and ...

Claims

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Application Information

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IPC IPC(8): C23C28/04C23C18/12C25D9/04C25D9/06C02F1/461
Inventor 戴启洲陈建孟王家德沈宏夏伊静
Owner ZHEJIANG UNIV OF TECH
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