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Copper-modified nitrogen-doped titanium dioxide material, and preparation method and application thereof

A titanium dioxide and nitrogen doping technology, applied in chemical instruments and methods, chemical/physical processes, special compound water treatment, etc., can solve the problems of reduced production efficiency and long production cycle, and achieve reduced water toxicity and improved photocatalytic efficiency , The effect of strong photocatalytic reduction performance

Inactive Publication Date: 2019-04-05
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of preparing titanium dioxide by the sol-gel method mainly includes the preparation of a homogeneous solution of water and alkoxide, sol, gel, drying and heat treatment, but the aging time in the preparation often reaches several days, and the production cycle is long , reducing production efficiency

Method used

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  • Copper-modified nitrogen-doped titanium dioxide material, and preparation method and application thereof
  • Copper-modified nitrogen-doped titanium dioxide material, and preparation method and application thereof
  • Copper-modified nitrogen-doped titanium dioxide material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step (1): Add 3.86mL of dimethylformamide into 30mL of absolute ethanol and stir for 5min under magnetic force to obtain a clear mixed solution.

[0025] Step (2): Add 40 mL of tetrabutyl titanate to the solution obtained in step (1), stir magnetically, and mix evenly to obtain a sol.

[0026] Step (3): In the sol obtained in step (2), add 10 mL of copper chloride absolute ethanol solution with a concentration of 10.6 g / L and 5 mL of lemon Acid aqueous solution, and magnetically stirred to obtain a uniform sol, then dropwise added acetic acid at a rate of 1 drop / second, and adjusted the pH of the system to 3.0.

[0027] Step (4): The sol obtained in step (3) was subjected to ultrasonic treatment to obtain a uniform wet gel. The ultrasonic power was 100 W, the ultrasonic temperature was 50° C., and the ultrasonic time was 10 min.

[0028] Step (5): The wet gel obtained in step (4) was washed three times with absolute ethanol, placed in an oven, and dried at 80 °C for 12...

Embodiment 2

[0032] Step (1): Add 3.86 mL of dimethylformamide into 30 mL of absolute ethanol and stir for 5 min under magnetic force to obtain a clear mixed solution.

[0033] Step (2): Add 40 mL of tetrabutyl titanate into the solution obtained in step (1), stir magnetically, and mix well.

[0034] Step (3): Add 10 mL of copper chloride absolute ethanol solution with a concentration of 21.0 g / L and 5 mL of citric acid with a concentration of 35 g / L dropwise at a rate of 1 drop / second to the sol obtained in step (2). solution, and magnetically stirred to obtain a uniform sol, then dropwise added acetic acid at a rate of 1 drop / second, and adjusted the pH of the system to 3.0.

[0035] Step (4): Ultrasonic treatment is performed on the sol obtained in step (3) to obtain a uniform wet gel. The ultrasonic power is 100 W, the ultrasonic temperature is 50° C., and the ultrasonic time is 10 min.

[0036]Step (5): The wet gel obtained in step (4) was washed three times with absolute ethanol, pl...

Embodiment 3

[0042] Step (1): Add 3.86mL of dimethylformamide into 30mL of absolute ethanol and stir for 5min under magnetic force to obtain a clear mixed solution.

[0043] Step (2): Add 40 mL of tetrabutyl titanate into the solution obtained in step (1), stir magnetically, and mix well.

[0044] Step (3): In the sol obtained in step (2), add 10 mL of copper chloride absolute ethanol solution with a concentration of 32.0 g / L and 5 mL of lemon Acid solution, and magnetically stirred to obtain a uniform sol, then dropwise added acetic acid at a rate of 1 drop / second, and adjusted the pH of the system to 3.0.

[0045] Step (4): The sol obtained in step (3) was subjected to ultrasonic treatment to obtain a uniform wet gel. The ultrasonic power was 100 W, the ultrasonic temperature was 50° C., and the ultrasonic time was 10 min.

[0046] Step (5): The wet gel obtained in step (4) was washed three times with absolute ethanol, placed in an oven, and dried at 80 °C for 12 hours to obtain a coppe...

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Abstract

The invention discloses a copper-modified nitrogen-doped titanium dioxide material, and a preparation method and application thereof. The preparation method includes mixing dimethylformamide with anhydrous ethanol while stirring to obtain a clear mixed solution; adding tetrabutyl titanate into the mixed solution obtained in the previous step, and performing uniform stirring to obtain sol; dropwiseadding an anhydrous ethanol solution of copper chloride and a citric acid solution into the obtained sol, and dropwise adding acetic acid after uniform stirring; subjecting the obtained sol to ultrasonic treatment to obtain uniform wet gel; washing the wet gel obtained in the previous step with absolute ethanol prior to drying to obtain copper-modified nitrogen-doped xerogel, and grinding the xerogel into powder; calcinating the obtained powder, and grinding the powder again to obtain the copper-modified nitrogen-doped titanium dioxide material. The copper-modified nitrogen-doped titanium dioxide material prepared by the preparation method has strong photocatalytic reduction performance under visible light.

Description

technical field [0001] The invention relates to the preparation of photocatalytic materials and the application field of water purification, in particular to a preparation method of a copper-modified nitrogen-doped titanium dioxide material capable of rapidly and effectively reducing hexavalent chromium heavy metal ions in water to trivalent chromium ions. Background technique [0002] In recent years, heavy metals such as hexavalent chromium ions brought in by industrial production have polluted water bodies and seriously endangered ecosystems and human health. At present, factory wastewater is mainly treated and discharged through chemical precipitation, adsorption, redox, membrane separation technology and biological treatment. Although these methods are simple to operate and short in time, they are prone to secondary pollution and cannot be recycled. For super Low-concentration heavy metal ions can only be removed by adsorption and membrane separation. However, in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08B01J27/24C02F101/22
CPCC02F1/66C02F1/70B01J27/24C02F2305/10C02F2101/22B01J35/39
Inventor 方峰王世琦张泽灵徐正超周雪峰张旭海
Owner SOUTHEAST UNIV
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