Preparation method of composite beta-PbO2/manganese ore powder electrode

A composite electrode and manganese ore powder technology, applied in the electrode field, achieves the effect of compact electrode structure, good electrode stability, and simple preparation process

Inactive Publication Date: 2009-12-23
HEFEI UNIV OF TECH
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Problems solved by technology

However, the preparation of β-PbO 2 The electrode process is mostly electrodeposition method, and the plating layer falls off is PbO 2 The main corrosion method of the electrode. In order to solve this problem, a lot of research at home and abroad has been devoted to electrodeposition preparation conditions, selection of substrate materials, and doping modification.

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  • Preparation method of composite beta-PbO2/manganese ore powder electrode
  • Preparation method of composite beta-PbO2/manganese ore powder electrode
  • Preparation method of composite beta-PbO2/manganese ore powder electrode

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Embodiment Construction

[0027] 1. β-PbO 2 preparation of

[0028] 10g Pb(Ac) 2 Dissolve in 20mL water, adjust the pH value between 9.0 and 10.0 with NaOH, add 80mL Na 2 ClO, stirred evenly, and reacted at about 90°C for about 6 hours, and the obtained precipitate was filtered, washed and dried to obtain a dark brown powder. XRD test shows that the powder is β-PbO 2 , and has excellent electrical conductivity.

[0029] 2. Preparation of lead-manganese composite electrode

[0030] Get the pyrolusite powder and pulverize it through a 200-mesh sieve. spare.

[0031] (1) Take β-PbO 2 35 parts, 65 parts of pyrolusite powder, 2 to 5 parts of polytetrafluoroethylene binder (FDPF), mixed and ground evenly, molded into a sheet with a FW4 tablet press machine, and the electrode size is 13mm.

[0032] (2)β-PbO 2 99.9 parts, 0.1 part of pyrolusite powder, 2 to 5 parts of FDPF, the operation is the same as (1).

[0033] (3)β-PbO 2 40 parts, 60 parts of pyrolusite powder, 2 to 5 parts of FDPF, the ope...

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Abstract

A β-PbO2 / manganese ore powder composite electrode, which is a sheet-shaped electrode molded by uniformly mixing 35%-99.9% of β-PbO2 and 0.1%-65% of manganese ore powder with an organic binder. β-PbO2 is obtained by reacting lead acetate aqueous solution at pH 9-10 with sodium hypochlorite at 85-95°C for 5-7 hours, and then obtaining β-PbO2 after separation, washing and drying. The composite electrode is used as an anode for electrochemical oxidation to treat biologically refractory organic pollutants. The oxygen evolution potential of this electrode is about 1.8V, which is 20% higher than that of the β-PbO2 electrode, which is conducive to the degradation of organic pollutants on the anode, and at the same time inhibits the competition of side reactions. The electrode solves the problem of shedding of the coating β-PbO2 and has a long service life.

Description

1. Technical field [0001] The present invention relates to an electrode, in particular to PbO for electrochemical oxidation 2 electrode, to be exact a β-PbO 2 / Manganese ore powder composite electrode and β-PbO 2 method of preparation. 2. Background technology [0002] Electrochemical oxidation has its unique effect on the treatment of biologically refractory substances, such as dyes, phenols, benzoquinones, quinolines, and various wastewaters such as papermaking, leather, and landfill leachate, and its development prospects are eye-catching. One of the current research hotspots. The mechanism of electrocatalytic oxidation is mainly that the external voltage is the driving force of the chemical reaction, forcing the organic matter to lose electrons on the electrode and change the molecular structure to be oxidized. Electrode materials and catalytic materials are important determinants in electrocatalytic oxidation technology, which will directly affect the efficiency an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/02B22F1/00C25B11/16
Inventor 汪家权朱承驻金松李云霞谭茜
Owner HEFEI UNIV OF TECH
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