Method for preparing high dispersity nano zinc oxide

A nano-zinc oxide and high-dispersion technology, applied in the direction of zinc oxide/zinc hydroxide, etc., can solve problems such as cost increase, unfavorable industrial production, and increased production operations, and achieve mild reaction conditions, large specific surface area, and good dispersion Effect

Inactive Publication Date: 2008-02-20
CHINA RES INST OF DAILY CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the method of adding modifiers to prepare highly dispersible zinc oxide will greatly in...

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0015] At room temperature, make a mixture of zinc nitrate and ammonium carbonate (the molar ratio of zinc to ammonium is 1:1.2), and then add ammonia water with a mass concentration of 10% to the mixture (the molar ratio of zinc to ammonia is 1:4) , fully stirred for 1 hour, aged at room temperature for 1 day, filtered to obtain the supernatant liquid, distilled ammonia at 70°C, filtered, washed with deionized water until pH = 6, dried at 50°C, and placed in a muffle furnace at 200°C Roast for 2 hours to obtain a nano zinc oxide product.

Embodiment 2

[0017] At room temperature, zinc chloride and ammonium nitrate were made into a mixture (the molar ratio of zinc to ammonium was 1:5), and then ammonia water with a mass concentration of 15% was added to the mixture (the molar ratio of zinc to ammonia was 1:2 ), fully stirred for 2 hours, aged at room temperature for 1 day, and filtered to obtain the supernatant liquid, which was distilled with ammonia at 75°C, filtered, washed with deionized water until pH = 7, dried at 60°C, and placed in a muffle furnace at 300°C Medium roasting for 2 hours to obtain nano zinc oxide product.

Embodiment 3

[0019] At room temperature, zinc chloride and ammonium oxalate were made into a mixture (the molar ratio of zinc to ammonium was 1:3), and then ammonia water with a mass concentration of 15% was added to the mixture (the molar ratio of zinc to ammonia was 1:8 ), fully stirred for 3 hours, aged at room temperature for 2 days, filtered to obtain the supernatant liquid, distilled ammonia at 80°C, filtered, washed with deionized water until pH = 7, dried at 65°C, and dried in a muffle furnace at 400°C Medium roasting for 1 hour to obtain nano zinc oxide product.

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Abstract

The invention relates to a method to produce highly dispersed nano-zinc oxide. Zinc source and ammonium salt are mixed according to molar ratio 1:0.5-10 between zinc and ammonium; according to the molar ratio 1:0.5-10 between zinc and ammonia in ammonia water, concentration of which is 10-25 percent, ammonia water is added into the mixture, stirred for 1-10 hours, aged for 1-2 days and filtered; filtrate is steamed under 60 DEG C - 95 DEG C until white precipitate comes out and white precipitate is obtained after filtering; the white precipitate is washed by deionized water until pH value is 6-8, dried under 50 DEG C -110 DEG C, roasted for 1-8 hours under 200 DEG C-800 DEG C to get the nano-zinc oxide. The invention has the advantages of simple production process, mild reaction condition and getting nano-zinc oxide with large specific surface area, good dispersion, non-aggregation and comparatively good photo-catalytic activity.

Description

technical field [0001] The invention belongs to a method for preparing highly dispersed nano zinc oxide, in particular to a method for preparing highly dispersed nano zinc oxide with photocatalytic activity. Background technique [0002] As a photocatalyst, nano-zinc oxide has the characteristics of non-toxic and harmless, stable structure and performance. Its photocatalytic process uses air or oxygen as an oxidant, and can directly use sunlight as an excitation source. It can degrade organic and inorganic pollutants, protect the environment, It is of great significance to maintain ecological balance, and has become a green and environmentally friendly catalyst with development prospects. At present, the chemical precipitation method is mostly used in the industrial preparation of nano-zinc oxide. The prepared nano-zinc oxide has poor dispersion and serious agglomeration, and there are many problems in practical application (Zhan Guoping, Huang Kelong, Liu Suqin. Nano-scale ...

Claims

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Application Information

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IPC IPC(8): C01G9/02
Inventor 杜志平胡利利台秀梅赵永红王万绪刘晓英
Owner CHINA RES INST OF DAILY CHEM IND
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