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Method for electrolyzing orange G by adopting cerium-doped tin antimony oxide coated titanium electrode

An oxide coating and electrolytic treatment technology, applied in the field of electrochemistry and environmental chemistry, can solve the problems of unsatisfactory removal rate and current density, difficult industrial application, high degradation efficiency, etc., and achieve electrolysis equipment and its operation is simple and the time is short , The effect of simple production process

Inactive Publication Date: 2010-09-15
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have problems such as high cost, low efficiency, and possible secondary pollution that needs to be dealt with.
At present, there are many research reports on advanced oxidation technologies such as photocatalytic technology, and their degradation efficiency is high. However, photocatalytic oxidation technology requires excitation means, which is difficult for industrial application
[0004] The Chinese invention patent with the application number 200610144146.9 discloses "a method for electrolytic treatment of organic wastewater using an iridium-tantalum-tin oxide-coated titanium electrode". Although this electrode can remove a variety of organic substances, the removal rate and current density are still not ideal

Method used

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  • Method for electrolyzing orange G by adopting cerium-doped tin antimony oxide coated titanium electrode
  • Method for electrolyzing orange G by adopting cerium-doped tin antimony oxide coated titanium electrode
  • Method for electrolyzing orange G by adopting cerium-doped tin antimony oxide coated titanium electrode

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Effect test

Embodiment 1

[0039] A method for electrolytically treating orange G with a cerium-doped tin antimony oxide coated titanium electrode comprises the following steps:

[0040] (1) Preparation of cerium-doped tin antimony oxide coated titanium electrode

[0041] ①Preparation of coating solution: at 60°C, first react ethylene glycol with citric acid to obtain an alcohol solution of ethylene glycol citrate, and then add SnCl 4 ·5H 2 O: SbCl 3 : Ce[Ce(NO 3 ) 3 ·6H 2 O] is 100:10:1 (molar ratio), controls ethylene glycol, citric acid, chloride to be 14:3:1 (molar ratio), stirs and heats up to 90 DEG C, constant temperature 30min, obtains coating solution;

[0042] ②Pretreatment of titanium substrate: polish the titanium sheet with sandpaper, rinse it with water, heat it to boiling in 5% NaOH solution for 1h, rinse it with deionized water, and immerse it in HF:HNO 3 :H 2After 1 min in O=1:4:5 (volume ratio), take out and heat to boiling with 10% (mass fraction) oxalic acid solution for 2 hou...

Embodiment 2

[0047] A method for electrolytically treating orange G with a cerium-doped tin antimony oxide coated titanium electrode comprises the following steps:

[0048] (1) Preparation of cerium-doped tin antimony oxide coated titanium electrode

[0049] ①Preparation of coating solution: At 100°C, first react ethylene glycol with citric acid to obtain an alcohol solution of ethylene glycol citrate, and then add SnCl 4 ·5H 2 O: SbCl 3 : Ce[Ce(NO 3 ) 3 ·6H 2 O] is 80: 12: 0.8 (molar ratio), control ethylene glycol, citric acid, and chloride to 12: 3.6: 0.8 (molar ratio), stir and heat up to 80 ° C, keep the temperature for 20 minutes, and the coating solution is obtained;

[0050] ② Pretreatment of titanium substrate: polish the titanium sheet with sandpaper, rinse it with water, heat it to boiling in 10% NaOH solution for 1 hour, rinse it with deionized water, and immerse it in HF:HNO 3 :H 2 After 1 min in O=0.8:4.8:4.0 (volume ratio), take out and heat to boiling with 10% (mass ...

Embodiment 3

[0055] A method for electrolytically treating orange G with a cerium-doped tin antimony oxide coated titanium electrode comprises the following steps:

[0056] (1) Preparation of cerium-doped tin antimony oxide coated titanium electrode

[0057] ①Preparation of coating solution: at 80°C, first react ethylene glycol with citric acid to obtain an alcohol solution of ethylene glycol citrate, and then add SnCl 4 ·5H 2 O: SbCl 3 : Ce[Ce(NO 3 ) 3 ·6H 2 O] is 120:8:1 (molar ratio), controls ethylene glycol, citric acid, chloride to be 16:3:1.2 (molar ratio), stirs and heats up to 100 DEG C, constant temperature 40min, obtains coating solution;

[0058] ②Pretreatment of titanium substrate: polish the titanium sheet with sandpaper, rinse it with water, heat it to boiling in 20% NaOH solution for 2 hours, rinse it with deionized water, and immerse it in HF:HNO 3 :H 2 After 4 minutes in O=1.2:4:6 (volume ratio), take out and heat to boiling with 10% (mass fraction) oxalic acid sol...

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Abstract

The invention relates to a method for electrolyzing orange G by adopting a cerium-doped tin antimony oxide coated titanium electrode. The invention belongs to the technical field of electrochemistry and environmental chemistry, in particular to a method of carrying out oxidative degradation research on orange G analog waste water in an aseptate electrode tank by adopting a constant current electrolytic method by taking a self-made cerium-doped tin antimony oxide coated titanium electrode as the anode and a titanium plate as the cathode. Under the optimum process conditions that the effective areas of a negative electrode and a positive electrode are both 2.5cm*2.5cm, the distance between the electrodes is 1.5cm, i is equal to 4.8mA / cm<2>, the concentration of the orange G is 40mg / L, the concentration of NaCl is 0.35mol / L and pH is 7, the time of electrolysis is 30min, and the removing rate of the orange G reaches 99.4 percent. The invention improves the removing effect of the orange G with low energy consumption and no secondary pollution and meets the actual demands of industry.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry and environmental chemistry, and in particular relates to a self-made cerium-doped tin-antimony oxide coated titanium electrode as an anode, and a titanium plate as a cathode, which is oxidized by a constant current electrolysis method in an electrode tank without a diaphragm. Degradation of orange G. Background technique [0002] Orange G belongs to azo dyes. This kind of compound has -N=N-chromophoric group and is the main synthetic chromophoric organic compound. Due to its stable chemical properties and multi-functionality, the global annual usage accounts for more than 50% of the total dyes, and is widely used in textiles, leather, paper, rubber, plastics, cosmetics, medicine, food and other industries. These compounds are refractory, toxic, potentially carcinogenic, and mutagenic pollutants. Wastewater discharged during production and use will cause ecological damage to receiving wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F101/38
Inventor 方战强杨梅南俊民成文黄华坚
Owner SOUTH CHINA NORMAL UNIVERSITY
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