Preparation method of rare earth Pr (praseodymium)-Dy (dysprosium) doped nanometer titanium-based tin dioxide-antimony double coating electrode

A technology of tin dioxide and nano-titanium, applied in chemical instruments and methods, electrodes, electrolytic components, etc., can solve the problems of large grain size of the coating, poor bonding force between the coating and the substrate, and low service life

Inactive Publication Date: 2012-01-04
SHANDONG UNIV
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Problems solved by technology

However, there are still three defects in this method: first, the coating solution during immersion is a solution, and particle agglomeration is prone to occur during sintering, and the coating obtained by sintering has a large grain size, which limits the improvement of electrode performance; Under sintering, the internal stress of the coating particles is not fully released, which will also lead to larger grain size of the coating; third, the electrode only contains Nd-doped Sn and Sb catalytic layers, and the bonding force between the coating and the substrate is poor. The titanium substrate is easily passivated, and the durability and life of the coated electrode are poor
However, the electrode is still sintered at a single high temperature, and only contains Gd-doped Sn and Sb catalytic layers. It still has a large grain size of the coating and poor bonding between the coating and the substrate. The titanium substrate is easily passivated, and the coating Poor electrode durability and short lifespan

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  • Preparation method of rare earth Pr (praseodymium)-Dy (dysprosium) doped nanometer titanium-based tin dioxide-antimony double coating electrode
  • Preparation method of rare earth Pr (praseodymium)-Dy (dysprosium) doped nanometer titanium-based tin dioxide-antimony double coating electrode
  • Preparation method of rare earth Pr (praseodymium)-Dy (dysprosium) doped nanometer titanium-based tin dioxide-antimony double coating electrode

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Embodiment Construction

[0018] The preparation method of rare earth praseodymium and dysprosium joint doping nano-titanium-based tin dioxide-antimony double-coated electrode, the steps are as follows:

[0019] (1) Prepare mixed solution I with crystalline tin tetrachloride, antimony trichloride and praseodymium oxide according to the ratio of ion molar concentration Sn:Sb:Pr=100:5~7:0.75~1.25, and ultrasonic 10 at 70~100Hz ~30min, standing and aging for 1~2h to prepare Pr-doped sol I;

[0020] (2) Prepare mixed solution II with crystallized tin tetrachloride, antimony trichloride and dysprosium oxide according to the ratio of ion molar concentration Sn:Sb:Dy=100:5~7:0.75~1.25, and ultrasonicate at 70~100Hz for 10 ~30min, standing and aging for 1~2h to obtain Dy-doped sol II;

[0021] (3) Put the treated electrode matrix into the Pr-doped sol I prepared in step (1), let it stand for 4 to 8 minutes, dry, repeat 3 to 5 times, and then put the coated electrode matrix into Carry out pre-sintering in a m...

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Abstract

The invention relates to a preparation method of a rare earth Pr (praseodymium)-Dy (dysprosium) Pr-Dy doped nanometer titanium-based tin dioxide-antimony (Ti / Sb-SnO2) double coating electrode, belonging to the technical field of electrochemical water treatment. The sol-gel technology is adopted to coat the Pr-Dy doped Sn-Sb sol on the surface of a pretreated electrode substrate; and the heat treatment technology combining soaking-bottom low temperature sintering and temperature programming is adopted to prepare the nanometer Ti / Sb-SnO2 double coating electrode with a Pr doped Sn-Sb intermediate layer and a Dy doped Sn-Sb catalyst layer. The electrode is characterized by high oxygen evolution potential, high catalytic performance, high conductivity, durability and the like.

Description

technical field [0001] The present invention relates to the preparation method of nano-coating electrode, particularly a kind of rare earth praseodymium (Pr) and dysprosium (Dy) joint doping nano-titanium-based tin dioxide-antimony (Ti / Sb-SnO 2 ) The preparation method of a double-coated electrode belongs to the technical field of electrochemical water treatment. Background technique [0002] With the increasing types and complex components of pollutants discharged into water bodies by humans, especially the discharge of a large amount of toxic and biodegradable organic matter, it has brought great challenges to the traditional wastewater treatment industry. Therefore, it is urgent to develop new sewage purification treatment technology with good reliability, low cost and high benefit. [0003] Electrochemical technology is a promising method of sewage purification, which can convert refractory organic matter into easily biodegradable organic matter or completely oxidize it...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/04C02F1/461
Inventor 李善评曾雪媛张启磊
Owner SHANDONG UNIV
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