Visible light response with mesoporous structure cu 3 b 2 o 6 preparation method

A mesoporous structure, cu3b2o6 technology, applied in the field of Cu3B2O6 preparation, can solve the problem of low specific surface area of ​​the product, and achieve the effects of simple and easy preparation method, reduced production cost and low energy consumption

Active Publication Date: 2017-09-26
ZHEJIANG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved in the present invention is: overcome present solid phase method or sol-gel method to prepare Cu 3 B 2 o 6 Due to the problems of high reaction temperature and low specific surface area of ​​the product, the hydrothermal method was creatively used instead of the solid-phase method or sol-gel method to prepare Cu with mesoporous structure. 3 B 2 o 6 , this method is easy to operate, simple in equipment, mild in synthesis conditions, and has industrial prospects, and the obtained visible light-responsive mesoporous copper borate material can be used for photocatalysis or photosensitive sensors

Method used

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  • Visible light response with mesoporous structure cu <sub>3</sub> b <sub>2</sub> o <sub>6</sub> preparation method
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  • Visible light response with mesoporous structure cu <sub>3</sub> b <sub>2</sub> o <sub>6</sub> preparation method

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Experimental program
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Effect test

Embodiment 1

[0034] Weigh 1.0g of copper acetate (Cu(CH 3 COO)2 ·H 2 (2, 5mmol) was dissolved in 10mL distilled water to prepare 0.5mol / L copper acetate solution; mmol) was dissolved in 10 mL of absolute ethanol to prepare an ethanol solution containing P123; the ethanol solution containing P123 was added dropwise to the copper acetate solution, and stirred for 0.5 h to obtain a mixed solution. Dissolve 2 g of borax (5 mmol) in 10 mL of deionized water, add the resulting borax aqueous solution to the aforementioned mixture, and stir magnetically for 1 hour to obtain a suspension, transfer the suspension to a reaction kettle, heat at 110°C for 12 hours, and obtain the product After centrifugation, washing with deionized water at 60°C (150mL×4) and absolute ethanol (50mL×3), the washed product was dried at 110°C for 12h, and then roasted at 550°C for 7h in an air atmosphere. (The heating rate is 5°C / min), and the dark green powder Cu 3 B 2 o 6 0.43g.

[0035] Tested by small angle XRD,...

Embodiment 2

[0037] Weigh 0.605g of copper nitrate (Cu(NO 3 ) 2 ·3H 2 (2.5mmol) was dissolved in 5mL distilled water to prepare 0.5mol / L copper nitrate solution; 0.25g polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (F127, molecular weight 12600, 0.02 mmol) was dissolved in 5 mL of absolute ethanol to prepare an ethanol solution containing F127, which was added dropwise to the copper nitrate solution and stirred for 1 h to obtain a mixed solution. Dissolve 0.155g of boric acid (2.5mmol) in 5mL of deionized water, add the obtained aqueous solution of boric acid to the aforementioned mixture, stir magnetically for 1 hour to obtain a suspension, transfer the suspension to a reaction kettle, heat at 90°C for 72 hours, The obtained product was centrifuged, washed with deionized water at 6°C (150mL×4), and washed with absolute ethanol (50mL×4). After the washed product was dried at 90°C for 72h, the temperature was programmed to rise to 450°C in an air atmosphere. ...

Embodiment 3

[0040] Weigh 1.5g of copper acetate (Cu(CH 3 COO) 2 ·H 2 (2, 7.5mmol) was dissolved in 30mL distilled water to prepare 0.25mol / L copper acetate solution; mmol) was dissolved in 20 mL of absolute ethanol to prepare an ethanol solution containing P123, and the ethanol solution containing P123 was added dropwise to the copper acetate solution, and stirred for 3 h to obtain a mixed solution. Dissolve 1.726g of n-butyl borate (7.5mmol) in 10mL of absolute ethanol, add the obtained ethanol solution of n-butyl borate to the aforementioned mixture, stir magnetically for 1 hour to obtain a suspension, and transfer the suspension to the reaction kettle In 170°C water heating for 2 hours, the obtained product was centrifuged, washed with deionized water at 8°C (100mL×3), and washed with absolute ethanol (80mL×3). After drying the washed product at 120°C for 72h, it was Then, the temperature was programmed to rise to 650°C for 2 hours (the heating rate was 1°C / min), and the dark green ...

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Abstract

The invention provides a preparation method of visible-light response Cu3B2O6 with mesoporous structure. The preparation method is as below: adding a prepared template solution to a copper salt solution and stirring at room temperature for 0.5-7 h to obtain a mixed solution; adding a boron source solution to the obtained mixed solution, stirring, conducting hydrothermal reaction at 90-200 DEG C for 2-72 h; and centrifuging, washing, drying and calcining the reaction solution at 400-650 DEG C for 2-24 h to obtain the product. The invention employs the hydrothermal method to substitute a solid phase method or a sol-gel method, so as to obtain visible-light response Cu3B2O6 with high specific surface area and mesoporous structure. The preparation method is simple and low in energy consumption, and easy to realize industrial production and greatly reduces the production cost; and the prepared mesoporous Cu3B2O6 can produce a photocurrent under visible light, and can be used in the field of sensing to realize NO2 gas sensing at room temperature.

Description

(1) Technical field [0001] The present invention relates to a Cu 3 B 2 o 6 (Copper borate) preparation method, be specifically related to a kind of visible light response has mesoporous structure Cu 3 B 2 o 6 method of preparation. (2) Background technology [0002] Copper borate (Cu 3 B 2 o 6 ) has a narrow band gap (E g =2.34eV), the intermediate energy state width is 1.78eV, not only the electronic transition between the top of the valence band and the intermediate energy state can occur, but also the electronic transition between the forbidden bands can occur. Therefore, Cu 3 B 2 o 6 It is a photocatalyst with good visible light response. For example, Cu 3 B 2 o 6 Not only can it be used for hydrogen production with visible light (wavelength > 400nm), it is also commonly used for visible light degradation of dye wastewater such as methylene blue. As a member of borate materials, copper borate materials have other excellent properties, and have broad a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B35/12
CPCC01B35/127C01P2002/72C01P2004/03C01P2004/04C01P2004/64C01P2006/12C01P2006/16C01P2006/17C01P2006/40C01P2006/60
Inventor 陈爱民薄盈盈王后勇刘锐
Owner ZHEJIANG UNIV OF TECH
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