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Method for preparing copper-titanium dioxide core-shell nanoparticles

A technology of titanium dioxide and composite nanoparticles, which is applied in the field of preparing copper-titania core-shell nanoparticles, can solve the problems of limited energy utilization in the visible light segment, reduce the efficiency of titanium dioxide photoelectric materials and catalysts, and achieve a mild effect in the preparation process

Inactive Publication Date: 2012-02-01
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since pure TiO 2 The energy band is wide, the characteristic absorption wavelength is in the ultraviolet range, and the energy utilization rate for the visible light range is limited. In addition, the annihilation and recombination of photogenerated hole-electron pairs during the transmission process also reduces the use efficiency of titanium dioxide as a photoelectric material and catalyst.

Method used

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  • Method for preparing copper-titanium dioxide core-shell nanoparticles
  • Method for preparing copper-titanium dioxide core-shell nanoparticles
  • Method for preparing copper-titanium dioxide core-shell nanoparticles

Examples

Experimental program
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Effect test

Embodiment 1

[0028] a. Dissolve cuprous chloride in ammonia solvent, put 5ml cuprous chloride ammonia solution with a concentration of 0.5mol / L in a beaker, and stir for 15min;

[0029] b. Dissolve polyethylene glycol in deionized water, add 5ml of polyethylene glycol 1000 solution with a concentration of 0.005mol / L to step a, and stir for 15 minutes;

[0030] c. Dissolve sodium citrate in deionized water, add 10ml of deionized aqueous solution with a concentration of 0.1mol / L sodium citrate into step b, and stir for 15min;

[0031] d. Dissolve ascorbic acid in deionized water, add 5ml of deionized aqueous solution with a concentration of 0.1mol / L ascorbic acid into step c, and stir for 15min;

[0032] e. Dissolve tetrabutyl titanate in absolute ethanol, add 5 ml of tetrabutyl titanate solution with a concentration of 1.0 mol / L into step d, and stir for 15 minutes;

[0033] f. Add 0.001mol urea to step e, stir for 30min, place the mixed solvent in a 50ml polytetrafluoroethylene liner and ...

Embodiment 2

[0038] a. Dissolve cuprous chloride in ammonia solvent, put 15ml cuprous chloride ammonia solution with a concentration of 0.25mol / L in a beaker, and stir for 15min;

[0039] b. Dissolve polyethylene glycol in deionized water, add 10ml of polyethylene glycol 6000 solution with a concentration of 0.01mol / L to step a, and stir for 15 minutes;

[0040] c. Dissolve sodium citrate in deionized water, add 10ml of deionized aqueous solution with a concentration of 0.5mol / L sodium citrate into step b, and stir for 15min;

[0041] d. Dissolve ascorbic acid in deionized water, add 7ml of deionized aqueous solution of ascorbic acid with a concentration of 0.5mol / L to step c, and stir for 15min;

[0042] e. Dissolve tetrabutyl titanate in absolute ethanol, add 10ml of tetrabutyl titanate ethanol solution with a concentration of 0.5mol / L to step d, and stir for 15 minutes;

[0043] f, add 0.005mol urea in the step e, stir for 30min, place the mixed solvent in the 50ml polytetrafluoroethylen...

Embodiment 3

[0048] a. Dissolve cuprous chloride in ammonia solvent, put 20ml cuprous chloride ammonia solution with a concentration of 0.1mol / L in a beaker, and stir for 15 minutes;

[0049] b. Dissolve polyethylene glycol in deionized water, add 10ml of polyethylene glycol 20000 solution with a concentration of 0.001mol / L to step a, and stir for 15 minutes;

[0050] c. Dissolve sodium citrate in deionized water, add 10ml of sodium citrate solution with a concentration of 1.0mol / L to step b, and stir for 15min;

[0051] d. Dissolve ascorbic acid in deionized water, add 10ml of ascorbic acid solution with a concentration of 1.0mol / L to step c, and stir for 15min;

[0052] e. Dissolve tetrabutyl titanate in absolute ethanol, add 20ml of tetrabutyl titanate ethanol solution with a concentration of 0.1mol / L to step d, and stir for 15 minutes;

[0053] f, add 0.01mol urea in step e, stir for 30min, place the mixed solvent in the stainless steel reaction kettle device of 50ml polytetrafluoroet...

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Abstract

The invention relates to a method for preparing copper-titanium dioxide core-shell nanoparticles. In the method, cupric ions provided by cuprous chloride are dissolved into ammonia water; an aqueous solution of polyethylene glycol, an aqueous solution of sodium citrate, an aqueous solution of ascorbic acid, a solution of tetrabutyl titanate (absolute ethyl alcohol) and urea are sequentially addedinto the ammonia water; the ammonia water is put into a teflon-lined stainless steel autoclave after the ammonia water is stirred at room temperature; and the nearly-spherical core-shell nanoparticles are prepared through controlling the temperature and the time for the thermal reaction of the mixed solvents. In the method for preparing the copper-titanium dioxide core-shell nanoparticles, the ascorbic acid serves as a reducing agent and is used for reducing the cuprous ions; and the polyethylene glycol serves as a soft template. The method for preparing the copper-titanium dioxide core-shellnanoparticles has the advantages of simple process, environment-friendliness, low cost and the like; the outer layer of each of the prepared copper-titanium dioxide core-shell nanoparticles is anatase titanium dioxide, and the inner layer of each of the prepared copper-titanium dioxide core-shell nanoparticles is cubic-phase copper elementary substance; and the size distribution is even, and the particle size is controllable, thus the copper-titanium dioxide core-shell nanoparticles can be used as the electrode materials and the photocatalyst materials of dye-sensitized solar cells.

Description

technical field [0001] The invention relates to a method for preparing copper-titania core-shell nanoparticles by a mixed solvothermal method Background technique [0002] Energy and environmental issues are huge challenges facing human society in recent decades and centuries to come. One way to solve these two problems is to develop renewable, clean, and cheap new energy sources, such as solar power generation systems; the other is to develop low-cost, high-efficiency pollutant degradation technologies. TiO 2 Semiconductor nanomaterials such as semiconductors have the advantages of stable performance and low cost, and have been widely used in dye-sensitized solar cells and photocatalytic degradation of organic compounds. Since pure TiO 2 The energy band is wide, the characteristic absorption wavelength is in the ultraviolet range, and the energy utilization rate in the visible range is limited. In addition, the annihilation and recombination of photogenerated hole-electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01G9/042B01J23/72B82Y40/00
CPCY02E60/12Y02E60/10
Inventor 常爱民赵鹏君吴荣侯娟张慧敏关芳张博
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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