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Preparation method of meso-porous surface defect Cu-N-TiO2 microsphere photocatalytic material

A photocatalytic material, cu-n-tio2 technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of increasing recombination probability and catalytic efficiency , Unfavorable problems such as photogenerated holes or electron migration and separation, to achieve high visible light photocatalytic efficiency, improve absorption, and improve photocatalytic performance

Inactive Publication Date: 2018-10-23
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because in most cases, the doping energy level will become the recombination center of photogenerated electrons and holes, and the impurity energy levels formed by doping are mostly discrete, which is not conducive to the migration and separation of photogenerated holes or electrons, but increases the Its recombination probability, so there is still room for further improvement in catalytic efficiency

Method used

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  • Preparation method of meso-porous surface defect Cu-N-TiO2 microsphere photocatalytic material
  • Preparation method of meso-porous surface defect Cu-N-TiO2 microsphere photocatalytic material
  • Preparation method of meso-porous surface defect Cu-N-TiO2 microsphere photocatalytic material

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Experimental program
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Effect test

Embodiment 1

[0026] At room temperature, fully dissolve 1.98 g hexadecylamine in 200 ml ethanol, stir magnetically, add copper chloride ethanol solution, and add 1.6 ml deionized water at the same time, adjust the magnetic stirrer speed to 200 r / min, press Cu and The molar ratio of Ti is 0.1 / 100, titanium isopropoxide is added, and after stirring for 30 s, the solution is left to settle for 18 h. The precipitated product was washed three times with ethanol and deionized water respectively, dried and ground into powder; the powder was transferred to a 100 ml stainless steel high-temperature and high-pressure reactor with polytetrafluoroethylene lining, and 40 ml of ethanol and 20 ml of Water, placed in a muffle furnace for hydrothermal reaction at 160 °C for 18 h, then cooled to room temperature, the resulting product was washed three times with water and absolute ethanol to remove possible residual impurities, centrifugally filtered, and vacuum-dried at 60 °C, The dried product was calcine...

Embodiment 2

[0028] At room temperature, fully dissolve 1.98 g hexadecylamine in 200 ml ethanol, stir magnetically, add copper chloride ethanol solution, and add 1.6 ml deionized water at the same time, adjust the magnetic stirrer speed to 200 r / min, press Cu and The molar ratio of Ti is 0.01 / 100, titanium isopropoxide is added, and after stirring for 30 s, the solution is left to settle for 12 h. The precipitated product was washed three times with ethanol and deionized water respectively, dried and ground into powder; the powder was transferred to a 100 ml stainless steel high-temperature and high-pressure reactor with polytetrafluoroethylene lining, and 40 ml of ethanol and 20 ml of Water, placed in a muffle furnace for hydrothermal reaction at 180 °C for 14 h, then cooled to room temperature, the resulting product was washed three times with water and absolute ethanol to remove possible residual impurities, centrifugally filtered, and vacuum-dried at 60 °C. The dried product was calcin...

Embodiment 3

[0030] At room temperature, fully dissolve 1.98 g hexadecylamine in 200 ml ethanol, stir magnetically, add copper chloride ethanol solution, and add 1.6 ml deionized water at the same time, adjust the magnetic stirrer speed to 300 r / min, press Cu and The molar ratio of Ti is 0.02 / 100, titanium isopropoxide is added, and after stirring for 30 s, the solution is left to settle for 12 h. The precipitated product was washed three times with ethanol and deionized water respectively, dried and ground into powder; the powder was transferred to a 100 ml stainless steel high temperature and high pressure reactor with polytetrafluoroethylene lining, and 45 ml ethanol and 15 ml Water, placed in a muffle furnace for hydrothermal reaction at 180 °C for 14 h, then cooled to room temperature, the resulting product was washed three times with water and absolute ethanol to remove possible residual impurities, centrifugally filtered, and vacuum-dried at 60 °C. The dried product was calcined at ...

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Abstract

The invention discloses a preparation method of a meso-porous surface defect Cu-N-TiO2 microsphere photocatalytic material. The method comprises the following steps: 1) dissolving a surfactant in ethanol, and sequentially adding an ethanol solution of a copper-containing compound and deionized water while stirring, then adding a titanium-containing compound, continuously performing stirring for 30-50 s, standing the obtained solution to settle, and filtering the solution to obtain a precipitate; and 2) washing the precipitate with ethanol and / or water for 3 times or more, drying and grinding the washed precipitate to form a powder, hydrothermally reacting the powder, calcining a product obtained by the hydrothermal reaction in an air atmosphere, and carrying out high-temperature nitridingtreatment to obtain the meso-porous surface defect Cu-N-TiO2 microsphere photocatalytic material. The prepared microsphere photocatalytic material has uniform pores, good material dispersibility, large specific surface area and high photocatalytic efficiency.

Description

technical field [0001] The technical field of material synthesis of the present invention, especially relates to a mesoporous surface defect Cu-N-TiO 2 Preparation method of microsphere photocatalytic material. Background technique [0002] In recent years, a large number of experimental studies have confirmed that transition metal doping is an important method to improve the absorption of visible light. 2 The introduction of impurity levels in the forbidden band can promote the TiO 2 The absorption of visible light improves the TiO 2 photocatalytic activity. Since Asahi and other researchers first reported N-doped TiO in "Science" 2 Since the visible light photocatalytic activity, non-metallic doping has attracted extensive attention. And they used first-principles density functional theory to calculate the effect of N doping on TiO 2 Modulation of electronic band structure. According to the analysis, the doping should reach a certain content, so that the impurity st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J23/72B01J21/06B01J35/02B01J35/00
CPCB01J21/063B01J23/72B01J27/24B01J35/51B01J35/39
Inventor 杨明辉刘红红邹明明凤晓华王传洗曲奉东
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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