Preparation method for pyridine-wrapped lead-cadmium-sulfur nano particles and product of preparation method

A nanoparticle, lead, cadmium and sulfur technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of inability to carry out solution treatment, complex synthesis process requirements, and unsuitable, etc., To achieve the effect of non-toxicity, good application prospect and controllable process

Active Publication Date: 2016-07-20
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the synthesis process requirements of the above method are relatively complicated, solution treatment cannot be carried out, and the cost is relatively high, which is not suitable for large-scale factory production with strict cost control
[0004] At present, the preparation of lead, cadmium and sulfur nanomaterials by solution method is still rare, and the ratio of metal elements and the corresponding energy gap and energy level properties can be easily adjusted by solution method

Method used

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  • Preparation method for pyridine-wrapped lead-cadmium-sulfur nano particles and product of preparation method
  • Preparation method for pyridine-wrapped lead-cadmium-sulfur nano particles and product of preparation method
  • Preparation method for pyridine-wrapped lead-cadmium-sulfur nano particles and product of preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Dissolve 0.7mmol lead acetate and 0.3mmol cadmium acetate in a mixed solvent of 40mL pyridine and 10mL water, and heat up to 80°C; at the same time, dissolve 1mmol sodium sulfide in 20mL water; then, drop the sodium sulfide solution into the metal source solution for 20min After dropping, the reaction temperature was maintained at 80°C for 6h. The lead-cadmium-sulfur nanoparticles were settled down with acetone and centrifuged to obtain a black solid. Add 30mL of water, sonicate for 10min, then add 30mL of acetone, and centrifuge to obtain pure pyridine-wrapped lead, cadmium, and sulfur nanoparticles. Its XRD pattern is as follows figure 1 shown. The synthesized pyridine-wrapped lead-cadmium-sulfur nanoparticles are in the cubic phase, which is consistent with the XRD standard card JCPDSNo.65-5915. figure 2 The scanning electron microscope image of the pyridine-wrapped lead-cadmium-sulfur nanoparticles prepared for this example shows that the bright particles in the...

Embodiment 2

[0033] Dissolve 0.7mmol lead chloride and 0.3mmol cadmium acetate in a mixed solvent of 40mL pyridine and 10mL water, and heat up to 80°C; at the same time, dissolve 1mmol sodium sulfide in 20mL methanol; then, drop the sodium sulfide solution into the metal source The solution was dripped in 20 minutes; the reaction temperature was maintained at 80°C, and the reaction was carried out for 1 hour. The lead-cadmium-sulfur nanoparticles were settled down with acetone and centrifuged to obtain a black solid. Add 30mL of water, sonicate for 10min, then add 30mL of acetone, and centrifuge to obtain pure pyridine-wrapped lead, cadmium, and sulfur nanoparticles.

Embodiment 3

[0035] Dissolve 0.7mmol lead acetate and 0.3mmol cadmium chloride in a mixed solvent of 40mL pyridine and 10mL water, and heat up to 80°C; at the same time, dissolve 1mmol sodium sulfide in 20mL ethanol; then, drop the sodium sulfide solution into the metal source solution , 20min dripping; maintain the reaction temperature 80 ℃, the reaction 6h. The lead-cadmium-sulfur nanoparticles were settled down with acetone and centrifuged to obtain a black solid. Add 30mL of water, sonicate for 10min, then add 30mL of acetone, and centrifuge to obtain pure pyridine-wrapped lead, cadmium, and sulfur nanoparticles.

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Abstract

The invention discloses a preparation method for pyridine-wrapped lead-cadmium-sulfur nano particles. The method comprises the steps: mixing metal sources with a pyridine/water mixed solvent so as to obtain a metal source solution, wherein a lead source of the metal sources is lead acetate, lead chloride or lead nitrate, and a cadmium source is cadmium chloride or cadmium acetate; then, mixing a sulfur source with a protonic solvent so as to obtain a sulfur source solution, wherein the sulfur source is sodium sulfide, ethanethiol or thiourea; and finally, dropwise adding the sulfur source solution into the metal source solution, carrying out a reaction for 1 to 12 hours at the temperature of 50 DEG C to 90 DEG C, and carrying out centrifugal separation, thereby obtaining the pyridine-wrapped lead-cadmium-sulfur nano particles. According to the method, the preparation process is simple, the operation is easy, and the reaction conditions are mild; and the required metal sources and sulfur source are low in toxicity, the ligand is non-toxic, and the cost is low, so that the method is applicable to industrial production. The lead-cadmium-sulfur nano particles wrapped by pyridine which serves as the ligand are prepared.

Description

technical field [0001] The invention relates to the field of nanomaterial preparation, in particular to a method for preparing pyridine-wrapped lead, cadmium and sulfur nanoparticles and a product thereof. Background technique [0002] Lead cadmium sulfur nanoparticles are a new type of light-absorbing material for quantum dot batteries. Band gap, high absorption coefficient (at a wavelength less than 500nm, the absorption coefficient is greater than 10 5 cm -1 ; When the wavelength is greater than 500nm, the absorption coefficient is about 10 4 cm -1 ), metal elements are cheap and stored in large quantities on the earth, and can be industrially produced in large quantities. [0003] There are still relatively few studies on the preparation of lead-cadmium-sulfur nanocrystals or thin films. The current preparation methods mainly include chemical bath deposition, vacuum evaporation, spray pyrolysis, electrodeposition, etc. 5206-5210; Materials Chemistry and Physics 45 (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G21/21B82Y30/00
Inventor 酒同钢方俊锋罗维宁
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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