Gallium nitride/zinc oxide solid solution with high zinc content and preparation method thereof

A technology of zinc oxide and gallium nitride, which is applied in the field of gallium nitride/zinc oxide solid solution with high zinc content, can solve the problems of low content and achieve the effects of high production yield, simple preparation method and great industrialization value

Inactive Publication Date: 2011-08-31
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the content of zinc oxide in the obtained gallium nitride / zinc oxide solid solution is often very low (less than one-third), correspondingly it can only absorb light below 500nm, and both empirical and theoretical calculations believe that the content of zinc oxide is 50 %, the absorption edge of gallium nitride / zinc oxide solid solution is around 520nm

Method used

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  • Gallium nitride/zinc oxide solid solution with high zinc content and preparation method thereof
  • Gallium nitride/zinc oxide solid solution with high zinc content and preparation method thereof
  • Gallium nitride/zinc oxide solid solution with high zinc content and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] First, Zn / Ga / CO was synthesized by co-precipitation method 3 The double metal hydroxide precursor: dissolve 0.4g gallium oxide in 10ml boiling concentrated nitric acid (6M), add 0.35g zinc oxide after natural cooling, after dissolving, under vigorous stirring, use sodium hydroxide / sodium carbonate The pH value of the above acid solution was adjusted to 8 with the mixed solution to obtain a white suspension. The white suspension was put into an oven and kept at 80°C for 24h. Subsequently, the white precipitate was washed with deionized water and suction-filtered, and then vacuum-dried at 50° C. for 4 h. That is, Zn / Ga / CO is obtained 3 (Zn:Ga=1) double metal hydroxide.

[0027] Take 0.5g of the resulting Zn / Ga / CO 3 The double metal hydroxide was calcined at 800°C for 30min under an ammonia atmosphere. (Ammonia gas flow rate is controlled at 300ml / min) GaN / ZnO solid solution powder is obtained after natural cooling to room temperature.

Embodiment 2

[0029] Dissolve 0.4g of gallium oxide in 10ml of boiling concentrated nitric acid (6M), add 0.69g of zinc oxide after natural cooling, after dissolving, adjust the pH value of the above acid solution with a mixed solution of sodium hydroxide / sodium carbonate under vigorous stirring To 8, a white suspension was obtained. The white suspension was put into an oven and kept at 80°C for 24h. Subsequently, the white precipitate was washed with deionized water and suction-filtered, and then vacuum-dried at 50° C. for 4 h. That is, Zn / Ga / CO is obtained 3 (Zn:Ga=2) double metal hydroxide.

[0030] Take 0.5g of the resulting Zn / Ga / CO 3 The double metal hydroxide was calcined at 800°C for 30min under an ammonia atmosphere. (Ammonia gas flow rate is controlled at 300ml / min) After naturally cooling to room temperature, yellow gallium nitride / zinc oxide solid solution powder is obtained.

Embodiment 3

[0032] Dissolve 0.4g of gallium oxide in 10ml of boiling concentrated nitric acid (6M), add 1.05g of zinc oxide after natural cooling, after dissolving, adjust the pH value of the above acid solution with a mixed solution of sodium hydroxide / sodium carbonate under vigorous stirring To 8, a white suspension was obtained. The white suspension was put into an oven and kept at 80°C for 24h. Subsequently, the white precipitate was washed with deionized water and suction-filtered, and then vacuum-dried at 50° C. for 4 h. That is, Zn / Ga / CO is obtained 3 (Zn:Ga=3) double metal hydroxide.

[0033] Take 0.5g of the resulting Zn / Ga / CO 3 The double metal hydroxide was calcined at 800°C for 30min under an ammonia atmosphere. (Ammonia gas flow rate is controlled at 300ml / min) After naturally cooling to room temperature, yellow gallium nitride / zinc oxide solid solution powder is obtained.

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Abstract

The invention relates to a gallium nitride / zinc oxide solid solution with a high zinc content and a preparation method thereof. The mass content of zinc oxide is greater than 50% and less than or equal to 80%. The bimetal hydrate precursor of Zn / Ga / CO3 is prepared firstly, and then the precursor is nitridized to obtain the gallium nitride / zinc oxide solid solution with a high zinc content. The preparation method provided by the invention has simplicity and high preparation yield, and the prepared product has a high content of zinc oxide and adjustable contents of components.

Description

technical field [0001] The invention relates to a solid solution, in particular to a gallium nitride / zinc oxide solid solution with high zinc content, which can be used for hydrogen production by splitting water with visible light. Background technique [0002] In recent years, the global energy crisis has become increasingly serious, and the use of semiconductor photocatalysts to split water to produce hydrogen has become one of the most potential methods to solve energy problems. Among many photocatalysts, titanium dioxide is non-toxic and stable, but due to its wide band gap, it only responds to ultraviolet light and has low utilization efficiency of sunlight, which limits its application in photocatalytic hydrogen production. However, photocatalysts such as tungsten trioxide and bismuth vanadate that respond to visible light often cannot decompose water to generate hydrogen due to inappropriate conduction band positions. The composition and energy band of solid solution...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C01B3/04
CPCY02E60/364Y02E60/36
Inventor 张晓阳王俊鹏黄柏标秦晓燕
Owner SHANDONG UNIV
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