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Nano loaded titanium-based electric catalytic film and preparation method thereof

An electrocatalytic film, titanium-based technology, applied in the field of nano-supported titanium-based electrocatalytic film and its preparation, can solve the problem of low strength, achieve high strength, low working voltage, and strong corrosion resistance

Inactive Publication Date: 2012-02-15
SHANGHAI CAS ADVANCED RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, as the electrode substrate, the carbon film still has the following defects and limitations: due to the limitation of the material itself, the strength is low, and it can only be operated at a lower operating voltage range of 0-4V

Method used

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  • Nano loaded titanium-based electric catalytic film and preparation method thereof
  • Nano loaded titanium-based electric catalytic film and preparation method thereof
  • Nano loaded titanium-based electric catalytic film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The titanium-based electrocatalytic membrane in this embodiment consists of a tubular titanium membrane substrate and a metal-semiconductor compound coating.

[0021] Conductive titanium film substrate: tubular titanium film (the average pore diameter is 2.0 μm, the diameter of the pipe is Ф30mm×5mm, which indicates the outer diameter and thickness of the pipe, and the expression method of the pipe diameter in the following examples is the same)

[0022] Catalytic coating: Au / TiO 2

[0023] Preparation method: sol-gel method

[0024] The titanium-based electrocatalytic membrane as described above is prepared by the following steps:

[0025] (1) Titanium film pretreatment: Sandblast the titanium film; then soak it in NaOH solution for 0.5h, wash it to neutrality, cook it in oxalic acid solution with a concentration of 10% by mass for 1h, wash it with water, and wash it at 105 Dry at ℃;

[0026] (2) Catalyst loading: Mix butyl titanate, absolute ethanol, and distilled...

Embodiment 2

[0029]The titanium-based electrocatalytic membrane in this embodiment consists of a tubular titanium membrane substrate and a metal oxide coating.

[0030] Conductive titanium film substrate: tubular titanium film (average pore diameter is 1.0μm, tube diameter is Ф28.8mm×4.5mm)

[0031] Catalytic coating: PbO 2

[0032] Preparation method: electrodeposition method

[0033] The titanium-based electrocatalytic membrane as described above is prepared by the following steps:

[0034] (1) Titanium film pretreatment: Sandblast the titanium film; then soak it in NaOH solution for 1 hour, wash it to neutrality, cook it in oxalic acid solution with a concentration of 10% by mass for 2 hours, wash it with water, and heat it at 120°C down drying;

[0035] (2) Catalyst loading: configure 150g / L lead nitrate plating solution, adjust the pH to about 2 with nitric acid, at a temperature of 70°C, and a current density of 15mA / m 2 Under the condition of 2 Coated Ti-based electrocatalytic...

Embodiment 3

[0038] The titanium-based electrocatalytic membrane in this embodiment is composed of a plate-type titanium membrane substrate and a diamond coating.

[0039] Conductive titanium film substrate: plate titanium film (average pore size is 0.5μm, plate film size is 50mm×30mm)

[0040] Catalytic Coating: Diamond

[0041] Preparation method: hot wire chemical vapor deposition

[0042] Its preparation steps of the above-mentioned composite electrocatalytic membrane are as follows:

[0043] (1) Titanium film pretreatment: Sandblast the titanium film; then soak it in NaOH solution for 2 hours, wash it to neutrality, cook it in an oxalic acid solution with a concentration of 10% by mass for 1.5 hours, wash it with water, and wash it at 100 Dry at ℃;

[0044] (2) Smear diamond powder on the surface of the titanium film, and ultrasonic for 15 minutes;

[0045] (3) Install the filament, wash and dry the titanium film with clean water, blow it off with an air pump, add boron, and wipe ...

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Abstract

The invention discloses a nano loaded titanium-based electric catalytic film comprising a conductive microporous separating titanium film matrix and a catalytic coating. Furthermore, the invention also discloses a preparation method of the nano loaded titanium-based electric catalytic film, which comprises the following steps of: (1) preprocessing the titanium film matrix by sand blasting, alkali washing, and acid etching: soaking the matrix after sand blasting in an NaOH solution for 0.5 to 2h, then processing for 1 to 2h in an oxalic acid solution with the mass percent concentration of 10 percent after washing to a neutral state, washing with water and drying at 100 to 120 DEG C; and (2) preparing and loading a catalytic coating: preparing the catalytic coating by adopting a sol-gel method, a thermal decomposition method, an electrodeposition method or a chemical vapor deposition method and loading at the surface of the titanium film matrix and in a hole. Furthermore, the invention also discloses a film reactor comprising the nano loaded titanium-based electric catalytic film. According to the nano loaded titanium-based electric catalytic film, the defects on material strength, range limitation of working voltage, catalytic oxidation efficacy and the like in the prior art are solved.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic oxidation and membrane separation, in particular to a nano-loaded titanium-based electrocatalytic membrane and a preparation method thereof. Background technique [0002] The world's water shortage and water pollution are seriously affecting human survival, social and economic development, and national security. Industrial organic wastewater (such as oily, papermaking, printing and dyeing, coking and textile wastewater, garbage seepage, etc.) has large discharge, high salt content, high concentration of organic matter, and chemical oxygen demand (COD) is generally above 2000mg / L. Even as high as tens of thousands or even hundreds of thousands of mg / L, low biological oxygen demand (BOD), difficult biodegradation, difficult disposal, serious environmental pollution and other problems. Commonly used water treatment methods such as biological methods, adsorption methods, and chemical oxidati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D69/12B01D67/00C02F1/461C02F1/469C02F1/44
Inventor 李建新杨阳王虹何涛姜标
Owner SHANGHAI CAS ADVANCED RES INST
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