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Composite middle layer for titanium-based oxide electrode, titanium-based oxide electrode and preparation method of electrode

A composite intermediate layer, titanium-based oxide technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of unsatisfactory binding force and electrode electrocatalysis effect

Active Publication Date: 2019-05-21
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the tin-antimony intermediate layer cannot be directly used as the intermediate layer of titanium-based tin-based electrodes. At present, the intermediate layer of this type of electrode is mostly a single metal oxide such as Mn, Fe, etc., and its binding force with the titanium substrate and the electrocatalytic effect of the electrode are not ideal.

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  • Composite middle layer for titanium-based oxide electrode, titanium-based oxide electrode and preparation method of electrode
  • Composite middle layer for titanium-based oxide electrode, titanium-based oxide electrode and preparation method of electrode
  • Composite middle layer for titanium-based oxide electrode, titanium-based oxide electrode and preparation method of electrode

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preparation example Construction

[0035] The present invention provides a method for preparing a titanium-based oxide electrode described in the above technical solution, comprising the following steps:

[0036] (1) SnCl 4 , SbCl 3 , Mn(NO 3 ) 3 , Ce(NO 3 ) 3 Mixing with ethanol to obtain a first mixed ethanol solution, mixing the first mixed ethanol solution with hydrochloric acid and then aging to obtain an intermediate layer sol-gel coating solution;

[0037] (2) SnCl 4 , SbCl 3 、LaCl 3 Mixing with ethanol to obtain a second mixed ethanol solution, mixing the second mixed ethanol solution with hydrochloric acid and then aging to obtain an active layer sol-gel coating solution;

[0038] (3) coating the sol-gel coating solution of the intermediate layer in the step (1) on the surface of the titanium substrate, and then performing drying and thermal oxidation treatment successively to obtain a composite intermediate layer;

[0039] (4) Apply the active layer sol-gel coating liquid in the step (2) to t...

Embodiment 1

[0056] (1) Pretreatment of titanium substrate surface: 50mm×30mm×3mm titanium plates were polished with 180-mesh, 240-mesh, and 400-mesh sandpaper of different thickness and fineness, and then ultrasonicated in acetone for 30 minutes, then put in 10% hydrogen Heating in a water bath in sodium oxide solution for 1 hour, and finally slightly boiling in 10% oxalic acid solution for 2 hours;

[0057] (2) Preparation of intermediate layer coating solution: prepare SnCl with a molar concentration of 1mol / L 4 ·5H 2 O, the SbCl of 0.1mol / L 3 , 0.02mol / L Mn(NO 3 ) 3 and 0.02mol / L Ce(NO 3 ) 3 ·6H 2 O mixed ethanol solution, and then add an appropriate amount of dilute hydrochloric acid, stand and age for 3 hours before painting;

[0058] (3) Preparation of active layer coating solution: prepare SnCl with a molar concentration of 1mol / L 4 ·5H 2O, the SbCl of 0.1mol / L 3 and 0.015mol / L LaCl 3 ·7H 2 The mixed ethanol solution of O, other preparation methods are the same as (2); ...

Embodiment 2

[0109] Mn(NO in the embodiment 1 step (2) 3 ) 3 The concentration is changed to 0.05mol / L, Ce(NO 3 ) 3 ·6H 2 The concentration of O was changed to 0.02mol / L respectively, and the rest were the same as in Example 1 to obtain Ti / Ce-Mn / SnO 2 -Sb-La titanium based oxide electrode.

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Abstract

The invention provides a composite middle layer for a titanium-based oxide electrode and relates to the technical field of metal oxide electrodes. The composition of the composite middle layer comprises MnO2, CeO2, SnO2 and Sb2O3; the MnO2 and the CeO2 are doped in the SnO2 and the Sb2O3 through a solid solution form; the molar ratio of the Mn element to the Ce element to the Sn element to the Sbelement in the composite middle layer is (0.01-0.05):(0.01-0.2):(0.5-1.5):(0.05-0.15). The invention provides the titanium-based oxide electrode and a preparation method thereof. The titanium substrates in the composite middle layer and the titanium-based oxide electrode are well combined, the electrochemical performance of the titanium-based oxide electrode, the electrocatalytic oxidation degradation capacity of the titanium-based oxide electrode to phenol and the stability the titanium-based oxide electrode can be obviously improved, and the service life of the titanium-based oxide electrodecan be obviously prolonged.

Description

technical field [0001] The invention relates to the technical field of metal oxide electrodes, in particular to a composite intermediate layer for a titanium-based oxide electrode, a titanium-based oxide electrode and a preparation method thereof. Background technique [0002] With the acceleration of my country's industrialization process, a large amount of organic wastewater has become increasingly serious environmental pollution. This type of wastewater has complex components, high content of COD and toxic substances, and a wide range of pH changes. Traditional biochemical treatment methods cannot be effectively treated. In recent years, electrochemical oxidation water treatment technology is considered to be an effective way to solve the problem of organic wastewater treatment due to its simple equipment, controllable operation, and many advantages such as not easy to produce secondary pollution. [0003] Ti / SnO 2 -Sb electrode material has attracted great attention of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/467C02F101/34
Inventor 毕强薛娟琴唐长斌高越管文中马思文党晨轩王增强
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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