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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 catalytic activity; at the same time, the photoelectrode overcomes the shortcomings of ordinary powder photocatalysts such as low catalytic efficiency and difficult recycling, and has high activity and is easy to use. Advantages such as repeated use

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

Embodiment 1

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

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

Embodiment 2

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

[0042] (2) Electrode preparation: add 2.0g melamine and 1.0g NH to 40mL deionized water 4 F. Ultrasound the mixed system for 30 minutes to obtain a milky white suspension mixed system, then transfer it to a 70mL autoclave, and add a clean titanium sheet, seal it and perform a hydrothermal reaction at 120°C for 72h, and remove the reacted titanium sheet with 100mL. Rinse with deionized water and dry at 50°C for 2h, then put into a crucible, heat up to 450°C at a rate of 20°C / min and keep for 4h, then cool naturally to room temperature to obtain a photoelectrode.

[0043] (3) Characterization of electrode activity: same as Example 1. The experimental results show that 107 cfu / ml of E. coli k-12 can be inactivated by 7-log after 30 minutes of light irradiation.

Embodiment 3

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

[0046] (2) Electrode preparation: add 1.5g melamine and 1.0g NH to 40mL deionized water 4 F. Ultrasound the mixed system for 30 minutes to obtain a milky white suspension mixed system, then transfer it to a 70mL autoclave, and add a clean titanium sheet, seal it and perform a hydrothermal reaction at 180°C for 72h, and remove the reacted titanium sheet with 100mL Rinse with deionized water and dry at 150°C for 2h, then put into a crucible, heat up to 550°C at a rate of 20°C / min and keep for 2h, then cool down to room temperature naturally to obtain a photoelectrode.

[0047] (3) Characterization of electrode activity: same as Example 1. The experimental results show that 107 cfu / ml of E. coli k-12 can be inactivated by 7-log after 50 minutes of light irradiation.

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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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