Method for Preparing black zinc oxide and application of black zinc oxide

A technology of zinc oxide and metal flakes, applied in the direction of zinc oxide/zinc hydroxide, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., to achieve low synthesis cost, simple operation steps, and mild reaction conditions Effect

Inactive Publication Date: 2011-01-26
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to all the oxide nanomaterials in the past, whether they are nanocrystals, nanorods or nanotube film materials prepared by sol-gel method, chemical deposition method or anodic oxidation method, there are disadvantages that absorbance and conductivity cannot be achieved at the same time.
Moreover, the production process is complicated and difficult to control
Whether it is used for sensitized solar cells, or for photocatalytic decomposition of water and photodegradation of organic matter, the effect has not been very satisfactory.

Method used

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  • Method for Preparing black zinc oxide and application of black zinc oxide
  • Method for Preparing black zinc oxide and application of black zinc oxide
  • Method for Preparing black zinc oxide and application of black zinc oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) get the zinc metal flakes with a purity of 90%, and use deionized water and absolute ethanol to ultrasonically clean it for 25 minutes for subsequent use;

[0029] (2) Inject the deionized water of its volume 40% in the reactor prepared by organic polymer, add sodium chloride and make solution with deionized water in the reactor, this solution chloride ion concentration is 0.01mol / L, drop Add acid or alkali to adjust the pH of the solution to 3;

[0030] (3) The reaction vessel of step 2 is placed in a muffle furnace for heating, allowing the zinc metal sheet to react in the reactor, the heating temperature is 80° C., and black zinc oxide is formed on the surface of the zinc metal sheet after heating for 100 hours;

[0031] (4) The reaction vessel in step 3 is naturally cooled to room temperature, and then the zinc metal sheet is taken out through cleaning and naturally dried to obtain black zinc oxide attached to the zinc metal sheet.

Embodiment 2

[0033] (1) Get the zinc metal flakes with a purity of 100%, and ultrasonically clean them with deionized water and absolute ethanol for 40 minutes for subsequent use;

[0034] (2) Inject the deionized water of its volume 95% in the reactor of noble metal, add sodium-chlor, potassium chloride and make solution with deionized water in the reactor, this solution chloride ion concentration is 1mol / L, drops Add acid or alkali to adjust the pH of the solution to 14;

[0035] (3) Add hydrogen peroxide to the reactor in step 2, place the reactor in a resistance furnace, and heat it to allow the zinc metal sheet to react in the reactor. The heating temperature is 240 ° C. After heating for 1 hour, the surface of the zinc metal sheet forms black zinc oxide;

[0036] (4) Put the reactor in step 3 into cold water to rapidly cool to room temperature, take out the zinc metal sheet, ultrasonically clean it with deionized water and absolute ethanol, then heat and dry to obtain the black zinc...

Embodiment 3

[0038] (1) get the zinc metal flakes with a purity of 95%, and ultrasonically clean them with deionized water and absolute ethanol for 30 minutes for subsequent use;

[0039] (2) Inject the deionized water of volume 85% in the reactor, add potassium chloride and make solution with deionized water in the reactor, this solution chloride ion concentration is 0.2mol / L, drip acid or alkali, adjust The pH value of the solution is 8;

[0040] (3) The reactor in step 2 is placed in an oven for heating, allowing the zinc metal sheet to react in the reactor, the heating temperature is 150° C., and black zinc oxide is formed on the surface of the zinc metal sheet after heating for 30 hours;

[0041] (4) The reactor in step 3 is put into cold water and rapidly cooled to room temperature, then the zinc metal sheet is taken out, ultrasonically cleaned with deionized water and absolute ethanol, dried naturally or heated and dried to obtain the zinc metal sheet attached Black Zinc Oxide.

...

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Abstract

The invention discloses a method for preparing black zinc oxide and the application of black zinc oxide, the synthetic method of the invention is that zinc sheet metal or zinc metal attaching thin layer and chlorine containing salt (comprises one or more metal chlorides, the reactivity of metals of which is listed before zinc, such as sodium chloride, potassium chloride, sodium chloride, potassium chloride, rough niter, ammonium chloride, barium chloride, aluminium chloride and the like) are adopted, water or organic solvent is served as reaction solvent under various alkalinity acidities, a special reaction vessel is adopted, and reaction and production can be performed under a certain temperature and pressure. The black zinc oxide can be widely applied to technical fields of the dye-sensitized solar cells, the water photolysis, the photodegradation of organic materials, the photo sensor, the infra-red tracking, and the like. The invention has the advantages of low synthetic cost, mild reaction condition and simple operation steps.

Description

technical field [0001] The invention belongs to the preparation and use of zinc oxide micro- and nano-crystal materials, and specifically relates to a preparation method of black zinc oxide and the use of black zinc oxide. Background technique [0002] At present, with the shortage and soaring prices of fossil energy, as well as the serious environmental pollution caused by the extensive use of fossil fuels, countries around the world are forced to actively look for new renewable and pollution-free green energy. Solar energy is inexhaustible, and it is the most promising green energy that can be developed and utilized in large quantities without any pollution. Countries all over the world have invested a lot of manpower and material resources in the development and utilization of solar energy. The most mature technology for using solar energy is to use silicon cells to generate electricity. However, silicon solar cells have a complicated manufacturing process, high energy c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G9/02H01M4/48B01J23/06G01J1/48
CPCY02E60/12Y02E60/10
Inventor 田永书胡陈果胡朝晖
Owner CHONGQING UNIV
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