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Electrochemical method for self-doping modification of titanium dioxide photo-catalyst

A technology of photocatalyst and titanium dioxide, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of Ti3+ unstable functional nanomaterials, and achieve green material preparation methods and speed up the reaction speed , to achieve the effect of catalyst regeneration

Inactive Publication Date: 2019-01-08
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Ti in the air 3+ The instability prevents it from being widely introduced into functional nanomaterials

Method used

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  • Electrochemical method for self-doping modification of titanium dioxide photo-catalyst
  • Electrochemical method for self-doping modification of titanium dioxide photo-catalyst
  • Electrochemical method for self-doping modification of titanium dioxide photo-catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0025] (1) Pretreatment: Cut out a Ti sheet with a size of 1cm*4cm with scissors, ultrasonically clean it with ethanol, acetone, and deionized water in sequence to remove surface impurities, and dry it for later use;

[0026] (2) Anodic oxidation: the titanium sheet obtained in step (1) is used as the anode, the titanium sheet is used as the negative electrode, and the dimethyl sulfoxide solution containing hydrogen fluoride is used as the electrolyte to carry out anodic oxidation, and the mass fraction of hydrogen fluoride in the electrolyte is 2%. When preparing the electrolyte, first measure the dimethyl sulfoxide solution and pour it into a small plastic beaker, then measure the hydrogen fluoride solution and add it to the dimethyl sulfoxide solution, and finally magnetically stir the electrolyte for 3 minutes to obtain a well-mixed electrolyte system. The voltage of anodizing is 30V, and the time is 7h. After oxidation, the Ti sheet was rinsed with deionized water and dr...

Embodiment 2

[0030] (1) Pretreatment: Cut out a Ti sheet with a size of 1cm*4cm with scissors, ultrasonically clean it with ethanol, acetone, and deionized water in sequence to remove surface impurities, and dry it for later use;

[0031] (2) Anodic oxidation: the titanium sheet obtained in step (1) is used as the anode, the titanium sheet is used as the negative electrode, and the dimethyl sulfoxide solution containing hydrogen fluoride is used as the electrolyte to carry out anodic oxidation, and the mass fraction of hydrogen fluoride in the electrolyte is 2%. When preparing the electrolyte, first measure the dimethyl sulfoxide solution and pour it into a small plastic beaker, then measure the hydrogen fluoride solution and add it to the dimethyl sulfoxide solution, and finally magnetically stir the electrolyte for 3 minutes to obtain a well-mixed electrolyte system. The voltage of anodizing is 35V, and the time is 6h. After oxidation, the Ti sheet was rinsed with deionized water and drie...

Embodiment 3

[0035] (1) Pretreatment: Cut out a Ti sheet with a size of 1cm*4cm with scissors, ultrasonically clean it with ethanol, acetone, and deionized water in sequence to remove surface impurities, and dry it for later use;

[0036] (2) Anodic oxidation: the titanium sheet obtained in step (1) is used as the anode, the titanium sheet is used as the negative electrode, and the dimethyl sulfoxide solution containing hydrogen fluoride is used as the electrolyte to carry out anodic oxidation, and the mass fraction of hydrogen fluoride in the electrolyte is 2%. When preparing the electrolyte, first measure the dimethyl sulfoxide solution and pour it into a small plastic beaker, then measure the hydrogen fluoride solution and add it to the dimethyl sulfoxide solution, and finally magnetically stir the electrolyte for 3 minutes to obtain a well-mixed electrolyte system. The voltage of anodizing is 40V, and the time is 8h. After oxidation, the Ti sheet was rinsed with deionized water and dr...

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Abstract

The invention discloses an electrochemical method for self-doping modification of a titanium dioxide photo-catalyst. The electrochemical method comprises the following steps: firstly, anodizing a Ti sheet for in-situ growth of titanium dioxide nano-tubes (TiO2 NTs), then performing cathode reduction on the titanium dioxide nano-tubes to obtain Ti<3+> self-doped TiO2NTs and finally putting a samplein a tubular furnace in which nitrogen gas is introduced for high-temperature calcination to obtain self-modified TiO2NTs (Reduced TiO2 NTs) containing stable Ti<3+>. The electrochemical method disclosed by the invention has the benefits that firstly, due to the contained stable Ti<3+>, the material photo-catalytic activity is high, and the performance is stable; secondly, tubular structures of the prepared TiO2 NTs enable the directional transmission of photo-generated electrons, and due to larger specific surface area, light and contact contaminants are more easily captured; finally, a material preparation method is green and simple, and the prepared all-solid-state catalyst is convenient to use and recover and can also be used as an electrode to participate in the application to the electrochemical field. The catalyst with high performance loss can also be prepared again by ultrasonic cleaning, so that the catalyst regeneration is realized, and the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of synthesis of nanometer semiconductor materials, in particular to an electrochemical method for self-doping modification of titanium dioxide photocatalyst. Background technique [0002] In recent years, my country's medical quality level and medical technology capabilities have been double improved. There are more types of drugs and a wider range of applications, and drug pollution is becoming more and more serious. At present, serious drug pollution exists in soil, surface water and groundwater in our country. Take chloramphenicol (CAP) as an example. This drug is widely used because of its low price and stable antibacterial properties. However, it has very serious toxic and side effects on the hematopoietic system, which not only inhibits the hematopoietic function of the bone marrow, but also causes aplastic anemia. In natural environment water bodies, CAP will not degrade by itself, and its long-ter...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J37/08B01J37/34
CPCB01J21/063B01J37/08B01J37/348B01J35/39
Inventor 杨丽霞程丹丹罗胜联
Owner NANCHANG HANGKONG UNIVERSITY
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