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A kind of iodine-doped lead dioxide electrode and its preparation method and application

A technology doped with lead dioxide and iodine, which is applied in chemical instruments and methods, electrolytic inorganic material coatings, water pollutants, etc., can solve environmental pollution and other problems, and achieve the effects of low price, effective removal, and strong catalytic activity

Active Publication Date: 2018-05-08
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to statistics, the presence of chlorophenols has been detected in surface water, groundwater, sediment and soil, which has caused serious pollution to the environment.

Method used

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  • A kind of iodine-doped lead dioxide electrode and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0021] (1) Preparation method of iodine-doped lead dioxide electrode: a, surface roughening treatment of titanium substrate: the thickness is 1mm, the size is 6cm 2 (2cm×3cm) pure titanium sheet was polished with 800# and 1200# sandpaper in turn, so that the surface showed a silvery white metallic luster, and then rinsed with deionized water; soaked in NaOH solution with a mass fraction of 40% for 3h, and took it out with deionized water Rinse with water; finally, etch with an oxalic acid solution with a mass fraction of 20% at 90°C for 3 hours, rinse with distilled water to remove the remaining oxalic acid and titanium oxalate on the surface of the titanium substrate, and obtain a pretreated titanium substrate; the pretreated titanium substrate, Preserve it in oxalic acid with a mass fraction of 1.5%; b, alkaline electroplating α-PbO 2 Bottom layer: The electrode prepared in step a is used as the anode, and the platinum sheet (2cm×2cm) of equal area is used as the cathode, wh...

Embodiment 2

[0024] Preparation of iodine-doped lead dioxide electrode except HIO in step (1) c 3 The concentration is 0.034mol / L, all the other operations are identical with embodiment 1 step (1).

[0025]The iodine-doped lead dioxide electrode prepared above was used as the anode, and 0.5mmol / L4-CP was treated, and the remaining operations were as in step (2) of Example 1. After the iodine-doped lead dioxide electrode electrochemically degraded 4-CP for 18h, the TOC The removal rate is 71.39%.

Embodiment 3

[0027] Preparation of iodine-doped lead dioxide electrode except HIO in step (1) c 3 The concentration is 0.054mol / L, all the other operations are identical with embodiment 1 step (1).

[0028] The iodine-doped lead dioxide electrode prepared above was used as the anode, and 0.5mmol / L4-CP was treated, and the remaining operations were as in step (2) of Example 1. After the iodine-doped lead dioxide electrode electrochemically degraded 4-CP for 18h, the TOC The removal rate is 56.28%.

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Abstract

The invention provides an iodine-doped lead dioxide electrode, a production method of the electrode and application of the electrode to treatment of 4-CP in waste water. The iodine-doped lead dioxide electrode is sequentially composed of a titanium substrate, an alpha-PbO2 bottom layer electrically deposited on the titanium substrate and an iodine-doped beta-PbO2 active layer electrically deposited on the alpha-PbO2 bottom layer from inside to outside. The production process of the electrode is simple, the treatment cost is low, and the effect of removing 4-CP in the waste water is obvious. The produced electrode has the advantages of being low in manufacturing cost, high in activity and long in service life and has wide market development prospects in application of electro-catalysis treatment of 4-CP in the waste water.

Description

technical field [0001] The invention relates to an iodine-doped lead dioxide electrode and a preparation method thereof, and the application of the iodine-doped lead dioxide electrode to electrocatalytically treat p-chlorophenol (4-CP) in organic waste water. Background technique [0002] The rapid development of industrial production and science and technology has led to the discharge of a large amount of organic pollutants that are difficult to degrade in the water body, especially the wastewater containing phenol, which has caused very serious pollution and damage to the environment and has become one of the major environmental problems faced by human beings. . Studies have shown that high concentrations of phenols can coagulate proteins and penetrate deeply into the body, causing tissue damage, necrosis and even systemic poisoning, while low concentrations of phenols can denature proteins. If humans drink water polluted by phenolic compounds for a long time, chronic poi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D9/06C02F1/461C02F101/34
CPCC02F1/46109C02F1/4672C02F2001/46138C02F2101/345C25D9/06
Inventor 宋爽余岩何志桥张博文
Owner ZHEJIANG UNIV OF TECH
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