High ozone catalytic activity diamond electrode and preparation method and application thereof

A diamond electrode and catalytic activity technology, applied in the field of electrochemistry, can solve the problems of complex medical wastewater components, and achieve the effects of improving electrolysis efficiency, strong tolerance, and increasing capillary effect.

Active Publication Date: 2022-03-08
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composition of medical wastewater is very complex, most of which contain salt ions (such as Cl - ), because the strong oxidizing ion hydroxyl radicals produced in the electrolysis process of BDD will be oxidized to produce harmful substances such as perchloric acid, so it is necessary to reduce the generation of hydroxyl radicals and increase the ozone production

Method used

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  • High ozone catalytic activity diamond electrode and preparation method and application thereof
  • High ozone catalytic activity diamond electrode and preparation method and application thereof
  • High ozone catalytic activity diamond electrode and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Step 1: Substrate pretreatment. Put a double-layer or triple-layer titanium mesh with a size of 3.5cm×7cm into 96mL (deionized water 90mL, concentrated sulfuric acid 6mL) of dilute sulfuric acid solution, and ultrasonically polish the surface for 30min. Then the titanium mesh was taken out, cleaned by ultrasonication in acetone and ethanol respectively for 5 minutes, the cleaned substrate was placed in diamond suspension and ultrasonicated for 30 minutes, and then blown dry with nitrogen at room temperature after taking it out.

[0055] Step 2: depositing boron doped diamond. Place the titanium mesh base on the abutment, keep the titanium mesh base in the middle of the hot wire and parallel to the hot wire, and the distance between the hot wire and the surface of the substrate is 20 mm. The pressure in the furnace is pumped down to below 0.1Pa, and then the reaction mixture gas is introduced. The gas introduced includes methane, hydrogen, and trimethylborane. Methane i...

Embodiment 2

[0060] Step 1: Substrate pretreatment. Put a double-layer or triple-layer titanium mesh with a size of 3.5cm×7cm into 96mL (deionized water 90mL, concentrated sulfuric acid 6mL) of dilute sulfuric acid solution, and ultrasonically polish the surface for 30min. Then the titanium mesh was taken out, cleaned by ultrasonication in acetone and ethanol respectively for 5 minutes, the cleaned substrate was placed in diamond suspension and ultrasonicated for 30 minutes, and then blown dry with nitrogen at room temperature after taking it out.

[0061] Step 2: depositing boron doped diamond. Place the titanium mesh base on the abutment, keep the titanium mesh base in the middle of the hot wire and parallel to the hot wire, and the distance between the hot wire and the surface of the substrate is 20 mm. The pressure in the furnace is pumped down to below 0.1Pa, and then the reaction mixture gas is introduced. The gas introduced includes methane, hydrogen, and trimethylborane. Methane i...

Embodiment 3

[0067] Step 1: Substrate pretreatment. Put a double-layer or triple-layer titanium mesh with a size of 3.5cm×7cm into 96mL (deionized water 90mL, concentrated sulfuric acid 6mL) of dilute sulfuric acid solution, and ultrasonically polish the surface for 30min. Then the titanium mesh was taken out, cleaned by ultrasonication in acetone and ethanol for 5 minutes respectively, the cleaned substrate was put into diamond suspension and ultrasonicated for 30 minutes, and then blown dry with nitrogen at room temperature after taking it out.

[0068] Step 2: depositing boron doped diamond. Place the titanium mesh base on the abutment, keep the titanium mesh base in the middle of the hot wire and parallel to the hot wire, and the distance between the hot wire and the surface of the substrate is 20mm. The pressure in the furnace is pumped down to below 0.1Pa, and then the reaction mixture gas is introduced. The gas introduced includes methane, hydrogen, and trimethylborane. Methane is ...

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Abstract

The invention discloses a diamond electrode with high ozone catalytic activity and its preparation method and application, comprising an electrode base, the surface of the electrode base is provided with a first boron-doped diamond layer, or the surface of the electrode base is provided with a transition layer. The surface of the transition layer is provided with a first boron-doped diamond layer; the surface of the first boron-doped diamond layer is provided with a second boron-doped diamond layer, and the second boron-doped diamond layer has a porous multi-channel structure . The diamond electrode with high ozone catalytic activity of the present invention has a second boron-doped diamond layer with a porous and multi-channel structure. Due to the porous and multi-channel structure of the electrode, capillary phenomenon can occur, and ozone can be generated above the liquid surface, which solves the problem of ozone production rate during diamond catalysis. Low, low disinfection and sterilization efficiency.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a diamond electrode with high ozone catalytic activity and its preparation method and application. Background technique [0002] The treatment of medical wastewater has always been a hot topic. There are not only various antibiotic organic substances in medical wastewater, but also viruses. At present, the commonly used medical wastewater treatment methods include adding strong oxidants such as chlorine-containing disinfectants and peroxide disinfectants. Most of these degradation methods contain chemical substances, and they cannot achieve the inactivation effect on some germs. Ozone is recognized as an effective bactericidal disinfectant, and is widely used in medical care, furniture sanitation and cleaning, and virus prevention and control. [0003] Boron-doped diamond (BDD) is a commonly used electrode for medical wastewater treatment. When boron-doped ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/031C25B11/053C25B11/063C25B11/091C25B11/061C25B11/065C25B1/13C23C16/27C23C16/32C23C16/56C23C14/24C23C14/16C23C14/18C23C28/00C02F1/461C02F1/50A61L2/20A61L101/10
CPCC25B1/13C23C16/271C23C16/325C23C16/56C23C14/24C23C14/18C23C14/16C23C28/322C23C28/341C02F1/46109C02F1/50A61L2/202C02F2001/46133C02F2303/04C02F2103/003C02F2201/782
Inventor 杨扬李东唐永炳
Owner SHENZHEN INST OF ADVANCED TECH
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