Mesoporous surface defect Mn-N-TiO2 microsphere photocatalytic material and preparation method thereof

A photocatalytic material, mn-n-tio2 technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as the instability of titanium dioxide

Inactive Publication Date: 2017-12-19
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Next is the era of metal-doped titanium dioxide, especially transition metal doping, but it has been reported that a single metal-doped titanium dioxide is not stable

Method used

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  • Mesoporous surface defect Mn-N-TiO2 microsphere photocatalytic material and preparation method thereof
  • Mesoporous surface defect Mn-N-TiO2 microsphere photocatalytic material and preparation method thereof
  • Mesoporous surface defect Mn-N-TiO2 microsphere photocatalytic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] At room temperature, fully dissolve 1.98g hexadecylamine in 200mL ethanol solution (98wt.%), stir magnetically, add manganese acetate solution, add 1.6mL deionized water at the same time, finally turn down the magnetic stirrer rotation speed, press Mn and The molar ratio of Ti is 0.5 / 100 and titanium isopropoxide is added rapidly. After stirring for 30s, the solution was left to settle for 18h. The resultant was washed 3 times with ethanol and deionized water, dried and ground. Transfer the powder to a 100mL stainless steel high temperature and high pressure reactor with polytetrafluoroethylene lining, add 40mL ethanol and 20mL water, place it in a muffle furnace for hydrothermal reaction at 160°C for 18h, then cool to room temperature, and the obtained product is water and absolute ethanol for three times to remove possible residual impurities, centrifugally filter, and vacuum-dry at 60°C. The dried product was calcined at 500° C. for 2 h in an air atmosphere. Obtai...

Embodiment 2

[0030] At room temperature, fully dissolve 1.98g hexadecylamine in 200mL ethanol solution (98wt.%), stir magnetically, add manganese acetate solution, add 1.6mL deionized water at the same time, finally turn down the magnetic stirrer rotation speed, press Mn and The molar ratio of Ti is 0.02 / 100 and titanium isopropoxide is added rapidly. After stirring for 30s, the solution was allowed to settle for 12h. The resultant was washed 3 times with ethanol and deionized water, dried and ground. Transfer the powder to a 100mL stainless steel high temperature and high pressure reactor with polytetrafluoroethylene lining, add 40mL ethanol and 20mL water, place it in a muffle furnace for hydrothermal reaction at 180°C for 14h, then cool to room temperature, and the obtained product is water and absolute ethanol for three times to remove possible residual impurities, centrifugally filter, and vacuum-dry at 60°C. The dried product was calcined at 400 °C for 1 h in an air atmosphere. Ca...

Embodiment 3

[0032]At room temperature, fully dissolve 1.98g hexadecylamine in 200mL ethanol solution (98wt.%), stir magnetically, add manganese acetate solution, add 1.6mL deionized water at the same time, finally turn down the magnetic stirrer rotation speed, press Mn and The molar ratio of Ti is 0.05 / 100 and titanium isopropoxide is added rapidly. After stirring for 30s, the solution was allowed to settle for 12h. The resultant was washed 3 times with ethanol and deionized water, dried and ground. Transfer the powder to a 100mL stainless steel high temperature and high pressure reactor with polytetrafluoroethylene lining, add 45mL ethanol and 15mL water, place in a muffle furnace for hydrothermal reaction at 180°C for 14h, then cool to room temperature, and the obtained product is water and absolute ethanol for three times to remove possible residual impurities, centrifugally filter, and vacuum-dry at 60°C. The dried product was calcined at 400° C. for 30 min in an air atmosphere. Ca...

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Abstract

The invention relates to a mesoporous surface defect Mn-N-TiO2 microsphere photocatalytic material and a preparation method thereof. The preparation method specifically comprises preparing mesoporous surface defect Mn-TiO2 microspheres and carrying out nitriding treatment, wherein the nitrogen source used for the nitriding treatment is ammonia gas, a surfactant is added during the preparation of the mesoporous surface defect Mn-TiO2 microspheres, and the nitriding treatment is performed in ammonia gas so as to obtain the mesoporous surface defect Mn-N-TiO2 microsphere photocatalytic material. According to the present invention, the metal double-doped titanium dioxide photocatalytic material obtained through the experiment process has characteristics of mesoporous structure and uniform spherical structure.

Description

technical field [0001] The invention relates to the technical field of material synthesis, in particular to a mesoporous surface defect Mn-N-TiO 2 Microsphere photocatalytic material and preparation method thereof. Background technique [0002] In recent years, titanium dioxide has attracted widespread attention at home and abroad due to its low cost, degradable and stable chemical properties. However, titanium dioxide has a wide band gap (3.2eV anatase titanium dioxide) and fast The wide application of composite TiO photocatalysts is limited. In addition, it only absorbs ultraviolet light, which accounts for less than 5% of sunlight. This also greatly hinders its practical application. Therefore, how to further improve the TiO 2 The photocatalytic activity has become a current active research topic. Improvements to titanium dioxide have gone through different stages. TiO 2 With its own improvement, the researchers found that anatase titanium dioxide has a better phot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/08
CPCB01J27/24B01J35/004B01J35/08
Inventor 杨明辉冯璐邹明明刘红红
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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