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Preparation method of magnesium-silver co-doped zinc oxide nanocrystals

A zinc oxide nano-, magnesium-silver technology, applied in chemical instruments and methods, crystal growth, single crystal growth, etc., can solve the problems of low solid solubility of acceptor impurities, impossibility of doping, restriction of application, etc., and achieve defect peak Weakening, narrow particle size distribution, and improving effects of zinc defects

Inactive Publication Date: 2013-01-09
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned intrinsic defects will have a highly self-compensating effect on the acceptor doping elements, and the solid solubility of the acceptor impurities is very low, which makes it difficult to realize the p-type transition, which restricts its application in the field of optoelectronics
Since the ionic radii of Ag and Zn are close, Ag can easily replace the position of Zn, but due to the relatively large ionic radius of Ag, it is impossible to achieve a higher concentration of doping

Method used

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  • Preparation method of magnesium-silver co-doped zinc oxide nanocrystals
  • Preparation method of magnesium-silver co-doped zinc oxide nanocrystals
  • Preparation method of magnesium-silver co-doped zinc oxide nanocrystals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] a. Put 18ml Triton X-100 (surfactant) into a small beaker, then add 75ml cyclohexane (continuous phase), 18ml n-hexanol (co-stabilizer) and 1ml water (discontinuous phase), Stir for 20 minutes to prepare a reverse microemulsion, then add 4ml, 0.25mol / L zinc nitrate solution, 120μL, 0.25mol / L silver nitrate solution, 40μL, 0.25mol / L magnesium nitrate solution, and stir for 30 minutes to obtain a microemulsion I.

[0020] b. Put 18ml of Triton X-100 (surfactant) into a small beaker, then add 75ml of cyclohexane (continuous phase), 18ml of n-hexanol (co-stabilizer) and 1ml of water (discontinuous phase), Stir for 20 minutes to prepare a reverse-phase microemulsion, then add 10ml, 1mol / L sodium hydroxide solution, stir for 30 minutes to obtain microemulsion II, mix and react microemulsion I and II for 12 hours to prepare Mg 2+ 、Ag + Co-doped [Zn(OH) 4 ] 2- Precursor;

[0021] c. The above-prepared Mg 2+ 、Ag + Co-doped [Zn(OH) 4 ] 2- The precursor was hydrolyzed in ...

Embodiment 2

[0023] a. Take 18ml of Triton X-100 (surfactant) and put it in a small beaker, then add 75ml of cyclohexane (continuous phase), 18ml of n-hexanol (co-stabilizer) and 1ml of water (discontinuous phase), and stir for 20 Minutes, prepare reverse microemulsion, then add 4ml, 0.25mol / L zinc nitrate solution, 120μL, 0.25mol / L silver nitrate solution, 80μL, 0.25mol / L magnesium nitrate solution respectively, stir for 30 minutes to obtain microemulsion Ⅰ.

[0024] b. Take 18ml of Triton X-100 (surfactant) and put it in a small beaker, then add 75ml of cyclohexane (continuous phase), 18ml of n-hexanol (co-stabilizer) and 1ml of water (discontinuous phase), and stir for 20 Minutes, prepare reverse microemulsion, then add 10ml, 1mol / L sodium hydroxide solution, stir for 30 minutes, get microemulsion II, mix microemulsion I and II for 12 hours, make Mg 2+ 、Ag + Co-doped [Zn(OH) 4 ] 2- Precursor;

[0025] c. The above-prepared Mg 2+ 、Ag + Doped [Zn(OH) 4 ] 2- The precursor was hy...

Embodiment 3

[0027] a. Put 18ml Triton X-100 (surfactant) into a small beaker, then add 75ml cyclohexane (continuous phase), 18ml n-hexanol (co-stabilizer) and 1ml water (discontinuous phase), Stir for 20 minutes to prepare an inverse microemulsion, then add 4ml, 0.25mol / L zinc nitrate solution, 120μL, 0.25mol / L silver nitrate solution, 120μL, 0.25mol / L magnesium nitrate solution, and stir for 30 minutes to obtain a microemulsion I.

[0028] b. Put 18ml of Triton X-100 (surfactant) into a small beaker, then add 75ml of cyclohexane (continuous phase), 18ml of n-hexanol (co-stabilizer) and 1ml of water (discontinuous phase), Stir for 20 minutes to prepare a reverse-phase microemulsion, then add 10ml, 1mol / L sodium hydroxide solution, stir for 30 minutes to obtain microemulsion II, mix and react microemulsion I and II for 12 hours to prepare Mg 2+ 、Ag + Co-doped [Zn(OH) 4 ] 2- Precursor;

[0029] c. The above-prepared Mg 2+ 、Ag + Co-doped [Zn(OH) 4 ] 2- The precursor was hydrolyzed i...

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Abstract

The invention relates to a preparation method of magnesium-silver co-doped zinc oxide nanocrystals, belonging to the technical field of composite nanocrystalline materials. A product provided by the invention is a magnesium-silver co-doped zinc oxide nanorod. The preparation method comprises the following steps of: firstly, preparing Zn<2+>:Ag<+>:Mg<2+> microemulsion and NaOH microemulsion by using a reversed phase microemulsion system of cyclohexane / triton X-100 / n-hexyl alcohol / aqueous solution; mixing and reacting the Zn<2+>:Ag<+>:Mg<2+> microemulsion with the NaOH microemulsion for a certain period of time to generate an Ag<+> / Mg<2+>-doped [Zn(OH)4]2-precusor; hydrolyzing at the temperature of 140 DEG C for 5 hours; and washing and drying to obtain the magnesium-silver co-doped zinc oxide nanocrystals. In the preparation method, ZnO:Ag-Mg nanoparticles are prepared by using a microemulsion method, Mg and Ag are taken as an active donor and an active acceptor respectively, the active donor Mg element and the active acceptor Ag element are co-doped into ZnO, the doping amount of Ag in ZnO is increased in the presence of the donor, and a lower Ag acceptor energy level is obtained,so that good p type ZnO nanoparticles are obtained.

Description

technical field [0001] The invention relates to a method for preparing magnesium-silver co-doped zinc oxide nanocrystals, belonging to the technical field of composite nanocrystal materials. Background technique [0002] ZnO is a new type of Ⅱ-Ⅵ group direct bandgap wide bandgap oxide semiconductor material with a bandgap at room temperature ( Eg = 3. 2eV ). Compared with other optoelectronic materials such as GaN, it has low dielectric constant, large The photoelectric coupling rate, high chemical stability, excellent piezoelectric and photoelectric properties, and the exciton binding energy of ZnO are as high as 60meV. It is a new optoelectronic material with great development prospects in ultraviolet and blue light emission. It has broad application prospects in solar cells, liquid crystal displays, gas sensors, ultraviolet semiconductor lasers, and transparent conductive films. The properties of nano-ZnO will show great differences with different doping components and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/16C30B7/14
Inventor 李冬梅傅腾飞姚亚玲熊婷婷徐天胜
Owner SHANGHAI UNIV
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