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Nano zinc oxide-doped powder and preparation method thereof

A technology of nano zinc oxide powder and zinc oxide, applied in the direction of zinc oxide/zinc hydroxide, nanotechnology, nanotechnology, etc., can solve the problem of affecting the uniformity of zinc oxide-based conductive materials, reducing the purity of zinc oxide-based conductive materials, zinc oxide Problems such as particle growth and agglomeration, to achieve excellent light stability and transparency, small zinc ion dissolution, and reduce the effect of particle agglomeration

Inactive Publication Date: 2012-08-01
JIANGSU DONGTAI FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

The main shortcomings of this method are: ① It is difficult to obtain uniform doping by ball milling, which affects the uniformity of the zinc oxide-based conductive material; ② It is easy to introduce a large amount of impurities during the ball milling process, resulting in the The purity is reduced; ③The precursor doped powder obtained after ball milling needs to be sintered at a higher temperature, and the dopant reacts with zinc oxide at high temperature to form a segregated phase and the zinc oxide particles are easy to grow and agglomerate, thus affecting its electrical conductivity sex and dispersion

Method used

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  • Nano zinc oxide-doped powder and preparation method thereof
  • Nano zinc oxide-doped powder and preparation method thereof
  • Nano zinc oxide-doped powder and preparation method thereof

Examples

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Embodiment 1

[0022] Embodiment 1: the ZnSO of 28.76g 4 ·7H 2 0 and 6.66g of Al 2 (SO4) 3 18H 2 0 was added to deionized water to form a mixed salt solution with a total concentration of 1.0 mol / L. Control the temperature of the mixed salt solution at 50°C, add 1.5 mol / liter of ammonium bicarbonate solution to the mixed salt solution while stirring, when the pH value of the system reaches 3.8, suspend adding the ammonium bicarbonate solution, and add it to the coprecipitated product Add 24 ml of 0.5 mol / L sodium silicate aqueous solution. After adding the sodium silicate aqueous solution, continue to add 1.5 mol / L ammonium bicarbonate solution to adjust the pH of the system to 7.5, raise the temperature to 75°C, and stir for 2 hours. Filter the obtained co-precipitation product, wash repeatedly with deionized water to remove soluble salts, when the conductivity of the filtrate is 200 μS / cm, end the washing, dry to obtain a white product, calcinate the white product at 800°C for 2 hours,...

Embodiment 2

[0023] Embodiment 2: the ZnSO of 28.76g 4 ·7H 2 0 and 1.998g of Al 2 (SO4) 3 18H 2 0 was added to deionized water to form a mixed salt solution with a total concentration of 0.2 mol / L. Control the temperature of the mixed salt solution at 30°C, add 3 mol / liter of ammonium carbonate solution to the mixed salt solution while stirring, when the pH value of the system reaches 3.5, suspend adding the ammonium carbonate solution, and add 1.0 18 ml of mol / L potassium silicate aqueous solution. After adding the potassium silicate aqueous solution, continue to add 3.0 mol / L ammonium carbonate solution to adjust the pH value of the system to 7.0, raise the temperature to 90°C, and stir and mature for 0.5h. Filter the obtained co-precipitation product, wash repeatedly with deionized water to remove soluble salts, when the conductivity of the filtrate is 260 μS / cm, end the washing, dry to obtain a white product, calcinate the white product at 700°C for 5 hours, and grind it to obtain ...

Embodiment 3

[0024] Embodiment 3: the Zn of 29.75g (NO 3 ) 2 ·6H 2 O and 6.75g Al (NO 3 ) 3 9H 2 0 was added to deionized water to form a mixed salt solution with a total concentration of 2.0 mol / L. Control the temperature of the mixed salt solution at 60°C, add 0.2 mol / liter of sodium carbonate solution to the mixed salt solution while stirring, when the pH value of the system reaches 4.0, suspend adding the sodium carbonate solution, and add 0.1 mol / liter of sodium carbonate solution to the coprecipitated product 30 ml of mol / L sodium silicate aqueous solution. After adding the sodium silicate aqueous solution, continue to add 0.2 mol / L sodium carbonate solution to adjust the pH of the system to 8.0, raise the temperature to 70°C, and stir for 4 hours. Filter the obtained co-precipitation product, wash repeatedly with deionized water to remove soluble salts, when the conductivity of the filtrate is 150 μS / cm, end the washing, dry to obtain a white product, calcinate the white produc...

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Abstract

The invention discloses a nano zinc oxide-doped powder and a preparation method thereof. Silicon-aluminum co-doped nano zinc oxide powder is synthesized by using a co-precipitation and calcining one-step method; and the mol ratio of aluminum as a doping element to zinc oxide and the mol ratio of silicon as a doping element to the zinc oxide are (0.03:1)-(0.18:1) respectively. The nano zinc oxide-doped powder disclosed by the invention has the advantages that the whiteness of nano zinc oxide and the light transmittance in a visible light band are improved; the photocatalytic activity of the nano zinc oxide, the dissolving of zinc ions and the particle size increase of the zinc oxide particles in the roasting process are inhibited; and the dispersibility of the nano zinc oxide in water is improved; and the preparation method has the advantages of convenience in operation, simple requirement on equipment, short process flow, low cost and suitability for large-scale industrial production.

Description

technical field [0001] The invention relates to a nano zinc oxide powder and a preparation method thereof, in particular to a doped nano zinc oxide powder and a preparation method thereof. Background technique [0002] Nano-zinc oxide refers to zinc oxide materials with a particle size between 1 and 100nm. It has better properties than ordinary zinc oxide materials, such as non-migration, fluorescence, piezoelectricity, and ability to absorb and scatter ultraviolet rays. Magnetism, light, electricity, sensitivity, antibacterial disinfection, ultraviolet shielding, etc., is a new type of functional material with broad application prospects. However, nano-zinc oxide has disadvantages such as yellowish color, poor dispersion, and easy dissolution of zinc ions in the actual use process, which limits its industrial application. At present, the preparation of doped zinc oxide powder has attracted much attention. Doped zinc oxide powder has the advantages of good dispersibility, n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02B82Y30/00B82Y40/00
Inventor 姚超张兴兴杨运冯建渡胡静怡
Owner JIANGSU DONGTAI FINE CHEM
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