Nitrogen-doped carbon polymer/TiO2 photoelectrode, as well as preparation method and application thereof

A nitrogen-doped carbon and polymer technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of difficult recycling and low catalytic efficiency, and achieve convenient operation and light response Wide range and the effect of overcoming the difficulty of recycling

Active Publication Date: 2013-12-25
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The photoelectrode can be photocatalytically active under visible light irradiation, overcoming the single TiO 2 The electrode has the disadvantage of photocatalytic activity only under the excitation of ultraviolet light, and has high visible light

Method used

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  • Nitrogen-doped carbon polymer/TiO2 photoelectrode, as well as preparation method and application thereof
  • Nitrogen-doped carbon polymer/TiO2 photoelectrode, as well as preparation method and application thereof
  • Nitrogen-doped carbon polymer/TiO2 photoelectrode, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0036] Example 1

[0037] (1) Pretreatment of titanium sheet: The titanium sheet (length×width×thickness=100mm×15mm×0.16mm) was ultrasonically cleaned in acetone, isopropanol and methanol for 15 minutes, and finally dried at 80°C to obtain a clean Titanium sheet.

[0038] (2) Preparation of electrode: add 1.0g melamine and 1.0g NH to 40mL deionized water 4 F. Ultrasound the mixing system for 30 minutes to obtain a milky white suspension mixing system. Then transfer it to a 70mL autoclave and add clean titanium flakes. After sealing, it will be hydrothermally reacted at 150℃ for 72h. The reacted titanium flakes are deionized with 100mL Rinse with water and dry at 80°C for 2h, then add it to the crucible, heat up to 550°C at a rate of 20°C / min, keep it for 4h, and cool to room temperature naturally to obtain a photoelectrode. figure 1 The given scanning electron microscope picture shows that the electrode surface obtained is composed of micron blocks with rough surface, and these blo...

Example Embodiment

[0040] Example 2

[0041] (1) Pretreatment of titanium sheet: the same as in Example 1, except that the size of the selected titanium sheet is length×width×thickness=10mm×10mm×0.05mm.

[0042] (2) Preparation of electrode: add 2.0g melamine and 1.0g NH to 40mL deionized water 4 F. Ultrasound the mixing system for 30 minutes to obtain a milky white suspension mixing system. Then transfer it to a 70mL autoclave and add clean titanium flakes. After sealing, hydrothermally react at 120°C for 72h. Use 100mL to remove the reacted titanium flakes. Rinse with ionized water and dry it at 50°C for 2h, then add it to the crucible, heat it up to 450°C at a rate of 20°C / min and keep it for 4h, and cool it naturally to room temperature to obtain a photoelectrode.

[0043] (3) Characterization of electrode activity: the same as in Example 1. The experimental results showed that 107cfu / ml of E.coli k-12 can reach 7-log inactivation after 30 minutes of light.

Example Embodiment

[0044] Example 3

[0045] (1) Pretreatment of titanium sheet: the same as in Example 1, except that the size of the selected titanium sheet is length×width×thickness=50mm×10mm×0.3mm.

[0046] (2) Preparation of electrode: add 1.5g melamine and 1.0g NH to 40mL deionized water 4 F. Ultrasonic the mixing system for 30 minutes to obtain a milky white suspension mixing system. Then transfer it to a 70mL autoclave, and add clean titanium flakes. After sealing, hydrothermally react at 180°C for 72h. Use 100mL to remove the reacted titanium flakes. Rinse with ionized water and dry it at 150°C for 2h, then add it to the crucible, heat it up to 550°C at a rate of 20°C / min and keep it for 2h, and cool it naturally to room temperature to obtain a photoelectrode.

[0047] (3) Characterization of electrode activity: the same as in Example 1. The results of the experiment showed that 107cfu / ml of E.coli k-12 could reach 7-log inactivation after light for 50min.

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Abstract

The invention belongs to the technical field of visible light catalytic materials, and discloses a visible light activated nitrogen-doped carbon polymer/TiO2 photoelectrode and a preparation method thereof. The preparation method of the visible light activated nitrogen-doped carbon polymer/TiO2 photoelectrode comprises the following steps of: putting a titanium plate in a melamine and ammonium fluoride mixed aqueous solution to perform a hydrothermal reaction; cooling, and taking out the titanium plate; washing, baking and calcining the titanium plate to obtain the visible light activated nitrogen-doped carbon polymer/TiO2 photoelectrode. According to the preparation method, the nitrogen-doped carbon polymer and TiO2 are compounded to prepare the photoelectrode, so that the defects of low efficiency and low activity of a single material can be overcome; the defects of low catalytic efficiency and difficult recycling and the like of common powdered photocatalyst can be overcome; the photoelectrode has the advantages of high activity and the like, and is easy to recycle. The visible light activated nitrogen-doped carbon polymer/TiO2 photoelectrode has a remarkable effect when being applied to the environmental protection field, in particular removal of harmful microbes in water body by visible light electro-catalysis.

Description

technical field [0001] The invention belongs to the technical field of visible light catalytic materials, in particular to a nitrogen-doped carbon polymer / TiO activated by visible light 2 Photoelectrode and its preparation method and application. Background technique [0002] In recent years, due to the continuous deterioration of the environment, a large number of harmful organic substances and microorganisms in the environment have brought a huge threat to human health and life. Every year, many people are caused by cancer, infection and even death. In order to ensure the health and safety of drinking water, the traditional treatment method is to add a large amount of chlorine or ozone to the drinking water to achieve the purpose of disinfection and oxidation, but this method is prone to produce some carcinogenic by-products. Therefore, how to choose a more effective and environmentally friendly water treatment and water disinfection method is very important. Photocataly...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F1/46
Inventor 安太成聂信陈江耀李桂英
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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