Metallic oxide electrode for organic wastewater processing and preparation thereof

A technology for organic wastewater treatment and oxidation, applied in the direction of electrochemical water/sewage treatment, electrodes, electrolysis process, etc., can solve the problems of high cost, complicated preparation process, long cycle, etc., and achieve low production cost, good electrical conductivity, The effect of long service life

Inactive Publication Date: 2010-06-02
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

They all use the thermal decomposition method to prepare an intermediate layer, which alleviates the oxidation of the substrate to a certain extent and prolongs the service life of the electrode, but the preparation process is complicated, the cycle is long, and the cost is high.

Method used

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  • Metallic oxide electrode for organic wastewater processing and preparation thereof
  • Metallic oxide electrode for organic wastewater processing and preparation thereof
  • Metallic oxide electrode for organic wastewater processing and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A metal oxide composite electrode for waste water treatment and its preparation method: Firstly, the industrial pure titanium plate is polished successively with 120-mesh and 600-mesh sandpaper, washed, put into acetone solution, and washed by ultrasonic oscillation for 20-30 minutes. 10-20% NaOH solution, 10-20% H 2 SO 4 solution and a saturated oxalic acid solution were boiled and etched for 1-1.5 hours respectively, and then rinsed with distilled water to obtain a pretreated titanium metal substrate.

[0023] Then two titanium plates were symmetrically distributed on both sides of the pretreated titanium metal substrate as cathodes, and placed together on the MnSO 4 120~140g / L,H 2 SO 4 In the 30-50g / L mixed solution, adopt the anode electrodeposition method, under the conditions of agitator stirring and temperature of 80-90°C, the anode current density is 5-10mA / cm 2 Deposit for 25 to 30 minutes; take it out and bake at 400 to 450°C for 1 to 1.5 hours to obtain T...

Embodiment 2

[0027] A metal oxide composite electrode for wastewater treatment and its preparation method: Firstly, the industrial pure titanium plate is polished successively with 120-mesh and 600-mesh sandpaper, washed and put into acetone solution, and washed by ultrasonic oscillation for 20-30 minutes . In turn, the mass percentage is 20-30% NaOH solution, 20-30% H 2 SO 4 solution and saturated oxalic acid solution were boiled and etched for 1.5-2 hours respectively, and then rinsed with distilled water to obtain a pretreated titanium metal substrate.

[0028] Then two titanium plates were symmetrically distributed on both sides of the pretreated titanium metal substrate as cathodes, and placed together on the MnSO 4 140~160g / L,H 2 SO 4 In the 50-60g / L mixed solution, the anode electrodeposition method is adopted, under the conditions of agitator stirring and temperature of 90-100°C, the anode current density is 10-15mA / cm 2Deposit for 20 to 25 minutes; take it out and bake at 450...

Embodiment 3

[0032] A metal oxide composite electrode for wastewater treatment and its preparation method: Firstly, the industrial pure titanium plate is polished successively with 120-mesh and 600-mesh sandpaper, washed and put into acetone solution, and washed by ultrasonic oscillation for 30-40 minutes . In turn, the mass percentage is 30-40% NaOH solution, 30-40% H 2 SO 4 solution and saturated oxalic acid solution were boiled and etched for 1.5-2 hours respectively, and then rinsed with distilled water to obtain a pretreated titanium metal substrate.

[0033] Then two titanium plates were symmetrically distributed on both sides of the pretreated titanium metal substrate as cathodes, and placed together on the MnSO 4 160~180g / L,H 2 SO 4 In the 60-80g / L mixed solution, the anode electrodeposition method is adopted, under the conditions of aeration and stirring and a temperature of 90-100°C, the anode current density is 15-20mA / cm 2 Deposit for 10 to 20 minutes; take it out and bake...

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Abstract

The invention relates to a metal oxide electrode used for the treatment of organic wastewater and a production method thereof. The technical proposal the following steps of: sequentially boiling and etching the industrially pure titanium sheet that is ground and washed in an alkali solution, acid solution and saturated oxalic acid solution respectively, then taking out and washing with a distilledwater to obtain a pre-treated metallic matrix of titanium; placing cathode titanium plates at two dies of the metallic matrix of titanium symmetrically and placing the both into a mixture of MnSO4 and H2SO4, then calcining after deposited by the anode electro-deposition process to obtain Ti / MnO2 electrode; the titanium plate cathode and the Ti / MnO2 electrode are placed in the mixture of Pb(No3)2,Cu(NO3)2, NaF and HNO3, then power is supplied by two stage during the anode electro-deposition process to obtain the Ti / MnO2 / PbO2 composite electrode. The production method provided by the inventionis simple and the manufacturing cost is low; the metal oxide electrode produced by the invention can be used for the treatment of organic wastewater and is characterized by high activity, good conductivity, strong anodic oxidation resistance and long service life.

Description

technical field [0001] The invention belongs to the technical field of metal oxide electrodes and their preparation. In particular, it relates to a metal oxide electrode for organic wastewater treatment and a preparation method thereof. Background technique [0002] Electrocatalytic technology has great application potential in the degradation of organic pollutants in water bodies, and has obvious advantages over photocatalytic and wet catalytic oxidation technologies in the mineralization and decomposition of refractory toxic organic substances. The electrocatalytic oxidation method has the advantages of no need for chemicals, small footprint, no secondary pollution, and convenient management. The mechanism of electrocatalytic oxidation technology is that it can directly or indirectly generate hydroxyl radicals through catalytically active electrode reactions at normal temperature and pressure, which can react with almost any organic pollutants and completely oxidize them ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/06C02F1/46
Inventor 张惠灵徐亮任大军农佳莹王晶范艳辉
Owner WUHAN UNIV OF SCI & TECH
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