Preparation method of porous nano zinc oxide (ZnO)

A nano, template technology, applied in the field of photocatalytic materials

Inactive Publication Date: 2012-06-27
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method of preparing porous nano-ZnO semiconductor photocatalysts with sublimable compounds as templates has not been r

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of porous nano ZnO semiconductor photocatalyst:

[0024] Anhydrous zinc sulfate: 10.0%

[0025] Crystalline zinc acetate: 1.0%

[0026] Sodium hydroxide: 5.5%

[0027] Melamine: 0.3%

[0028] Paraformaldehyde: 0.5%

[0029] Ammonia: 13.2%

[0030] Dimethylamine: 3.0%

[0031] Ethylenediamine: 2.0%

[0032] Deionized water: 64.5%

[0033] Preparation of porous nano-ZnO semiconductor photocatalyst: According to the above mass percentage, take half of the total amount of deionized water, add anhydrous zinc sulfate and crystalline zinc acetate, stir and dissolve to obtain an aqueous solution of zinc salt, and add hydroxide Sodium, stirred for 5h, and then used at a frequency of 30KH Z , Ultrasonic dispersion with a power of 1KW for 0.5h, centrifugal separation to obtain zinc hydroxide gel, zinc hydroxide gel was washed with 3 times of distilled water, ultrasonic dispersion and centrifugal separation, and repeated three times to obtain wet zinc hydroxide ...

Embodiment 2

[0035] Preparation of porous nano ZnO semiconductor photocatalyst:

[0036] Anhydrous zinc nitrate: 7.5%

[0037] Zinc tartrate anhydrous: 5.0%

[0038] Potassium Hydroxide: 6.7%

[0039] Paraformaldehyde: 0.6%

[0040] Maleic acid: 0.2%

[0041] Benzoic acid: 0.1%

[0042] Ammonia: 13.0%

[0043] Diethylamine: 2.0%

[0044] Ethylenediamine: 2.0%

[0045] Deionized water: 62.9%

[0046] Preparation of porous nano ZnO semiconductor photocatalyst: According to the above mass percentage, take half of the total amount of deionized water, add anhydrous zinc nitrate and anhydrous zinc tartrate, stir and dissolve to obtain an aqueous solution of zinc salt, add hydrogen to the aqueous solution of zinc salt Potassium oxide, stirred for 3 hours, and then used at a frequency of 28KH Z , Ultrasonic dispersion with a power of 0.8KW for 1h, and centrifugal separation to obtain zinc hydroxide gel. The zinc hydroxide gel was washed with distilled water twice, ultrasonic dispersion an...

Embodiment 3

[0048] Preparation of porous nano ZnO semiconductor photocatalyst:

[0049] Anhydrous Zinc Chloride: 8.2%

[0050] Lithium hydroxide: 2.8%

[0051] Hexamethylenetetramine: 0.5%

[0052] Paraformaldehyde: 0.4%

[0053] Maleic anhydride: 0.1%

[0054] Ammonia: 12.0%

[0055] Monoethylamine: 8.0%

[0056] Deionized water: 68%

[0057] Preparation of porous nano ZnO semiconductor photocatalyst: According to the above mass percentage, take half of the total amount of deionized water, add anhydrous zinc chloride, stir and dissolve to obtain an aqueous solution of zinc salt, add lithium hydroxide to the aqueous solution of zinc salt, stir Respond for 2h, then use frequency 40KH Z , Ultrasonic dispersion with a power of 1.5KW for 0.5h, centrifugal separation to obtain zinc hydroxide gel, zinc hydroxide gel was washed with 5 times of distilled water, ultrasonic dispersion and centrifugal separation, and repeated three times to obtain wet hydroxide Zinc product, add the wet zinc...

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Abstract

The invention discloses a preparation method of porous nano zinc oxide (ZnO). Zinc hydroxide gel is obtained through reaction and centrifugal separation with zinc salt, alkali and deionized water as raw materials according to the mass percent of zinc salt, alkali, sublimable compound template, amine chelant and deionized water of 0.001%-85%: 0.00001%-80%: 0.001%-65%: 0.001%-80%: 0.001%-95%. Wet zinc hydroxide products are obtained through processes of distilled water washing, ultrasonic dispersion, centrifugal separation and the like of zinc hydroxide gel, sublimable compound template, amine chelant and deionized water are added then, zinc hydroxide gel is dissolved to obtain solution through ultrasonic processing, and porous nano ZnO powder is obtained after processes of reduced pressure distillation of removal solvent and volatile constituent, drying, roasting, grinding and the like. The preparation method is simple and easy in process, small in investment and beneficial for popularization and application.

Description

technical field [0001] The invention relates to a method for preparing porous nanometer ZnO, which belongs to the field of photocatalytic materials. Background technique [0002] With the acceleration of industrialization and the sharp increase of energy consumption, environmental pollution is becoming more and more serious. In environmental pollution, chemical pollution accounts for 80% to 90% of all kinds of pollution. The main cause of pollution is waste gas, waste water and waste residue discharged from chemical industry production. According to the data released by the National Bureau of Statistics, my country is currently the world's largest emitter of sulfur dioxide and the second largest emitter of carbon dioxide. The discharge of industrial wastewater has also increased significantly, causing 30% of the drinking water sources in key cities to fail to meet Class III standards, 90% of the rivers flowing through the cities are polluted to varying degrees, and the degr...

Claims

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Application Information

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IPC IPC(8): C01G9/02B01J23/06B01J35/10
Inventor 刘福生
Owner NANJING FORESTRY UNIV
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