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Method for producing selenide and telluride nano-material with composite base metal hydroxide solvent

A hydroxide and nanomaterial technology, applied in the direction of binary selenium/tellurium compounds, etc., can solve the problem of impure mixing of products, and achieve the effect of easy monitoring and control, easy research, and few controllable parameters.

Inactive Publication Date: 2010-07-28
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although Parkin et al. obtained silver telluride through direct elemental reaction in liquid ammonia system at room temperature, the resulting product was an impure mixed phase

Method used

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  • Method for producing selenide and telluride nano-material with composite base metal hydroxide solvent
  • Method for producing selenide and telluride nano-material with composite base metal hydroxide solvent
  • Method for producing selenide and telluride nano-material with composite base metal hydroxide solvent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Concrete synthetic method of zinc selenide nanometer material

[0029] Zinc nitrate Zn(NO 3 ) 2 ·6H 2 O, selenium powder, hydrazine hydrate, NaOH, KOH, the specific operation steps are as follows:

[0030] Step 1, prepare the reaction solvent: KOH=57% and NaOH=43% are weighed and mixed as the reaction solvent.

[0031] Step 2, prepare reaction raw material: prepare zinc nitrate Zn (NO 3 ) 2 ·6H 2 O weight percentage=67.28%, the weight percentage=17.78% of selenium powder, the weight percentage=14.94% of hydrazine hydrate, weigh as reaction raw material. The weight percentage of the weight of the reaction raw material to the weight percentage of the reaction raw material+reaction solvent is 8.99%.

[0032] Step 3, heating reaction: put the reaction raw materials in the above step 2 and the reaction solvent in the above step 1 into a polytetrafluoroethylene reaction container, then cover the polytetrafluoroethylene container and put it into a constant temperature h...

Embodiment 2

[0037] Concrete synthetic method of lead selenide nanomaterial

[0038] Lead nitrate Pb(NO 3 ) 2 , selenium powder, hydrazine hydrate, NaOH, KOH, the specific operation steps are as follows:

[0039] Step 1, prepare the reaction solvent: KOH=57% and NaOH=43% are weighed and mixed as the reaction solvent.

[0040] Step 2, preparation reaction raw material: prepare lead nitrate Pb (NO 3 ) 2 Weight percent=69.26%, the weight percent of selenium powder=16.52%, the weight percent of hydrazine hydrate=14.22%, weighing as reaction raw material. The weight percentage of the weight of the reaction raw material to the reaction raw material+reaction solvent is 9.61%.

[0041]Step 3, heating reaction: put the reaction raw materials in the above step 2 and the reaction solvent in the above step 1 into a polytetrafluoroethylene reaction container, then cover the polytetrafluoroethylene container and put it into a constant temperature horse with a temperature of 200°C Furnace. After k...

Embodiment 3

[0046] Concrete synthetic method of cadmium selenide nanomaterial

[0047] Cadmium nitrate Cd(NO 3 ) 2 4H 2 O, selenium powder, hydrazine hydrate, NaOH, KOH, the specific operation steps are as follows:

[0048] Step 1, prepare the reaction solvent: KOH=57% and NaOH=43% are weighed and mixed as the reaction solvent.

[0049] Step 2, preparing reaction raw materials: preparing cadmium nitrate Cd(NO 3 ) 2 4H 2 O weight percentage=62.05%, the weight percentage=20.39% of selenium powder, the weight percentage=17.56% of hydrazine hydrate, weighing is used as reaction raw material. The weight percentage of the weight of the reaction raw material to the reaction raw material+reaction solvent is 7.93%.

[0050] Step 3, heating reaction: put the reaction raw materials in the above step 2 and the reaction solvent in the above step 1 into a polytetrafluoroethylene reaction container, then cover and seal the polytetrafluoroethylene container and place it in a -6 - Inside the const...

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Abstract

The invention discloses a method for preparing nanometer crystal material of selenide and telluride, suitable for preparing nanometer crystal materials such as zinc selenide, lead selenide, cadmium selenide, cuprous selenide, zinc and cadmium selenide, silver telluride and lead telluride. The method is characterized by replacing water or organic solvent in the prior hydrothermal / solvent thermal synthetic method with fused compound hydroxide of alkali metals, and carrying out chemical reaction under normal pressure of temperature of 100 to 300 DEG C. All materials are soluble inorganic metal salts, selenide powders and telluride powders. The synthetic process has low cost; various parameters (such as temperature, pressure, concentration, etc.) in the reaction process are easy to monitor and control; the reaction system is good in uniformity, simple in technology and easy in production expansion. The obtained crystal products have good crystallinity, clean surface and uniform size, thussuitable for intrinsic property research and function exertion of the nanometer crystal material to the maximum limit.

Description

technical field [0001] The invention belongs to the preparation of selenide and telluride nanometer materials, and in particular relates to a method for preparing selenide or telluride nanomaterials with a compound alkali metal hydroxide solvent. Background technique [0002] Because nano-selenide has many special properties and potential applications, it has been a research hotspot in recent years. Cu 2 Se and PbSe can be used as optical filters and superionic conductors due to their compositional diversity, and have been widely used in solar cells; ZnSe and CdSe, as important II-VI semiconductor materials, are widely used in physics, optics, biomarkers and electronics. It has gradually shown a wide range of application prospects in the field of science and other fields; ZnCdSe quantum dots also have good optical luminescence properties, and the luminescence wavelength is adjustable from ultraviolet to infrared, which has been proved to have a good application prospect in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/04
Inventor 胡陈果奚伊王中林严伟万步勇张密超黎飞云
Owner CHONGQING UNIV
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