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A preparation method of pyridine-wrapped lead cadmium sulfur nanoparticles and products thereof

A nanoparticle, lead cadmium sulfur technology, applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve problems such as inability to perform solution treatment, complex synthesis process requirements, and not suitable, etc. To achieve the effects of non-toxicity, good application prospects and process control

Active Publication Date: 2018-04-17
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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  • A preparation method of pyridine-wrapped lead cadmium sulfur nanoparticles and products thereof
  • A preparation method of pyridine-wrapped lead cadmium sulfur nanoparticles and products thereof
  • A preparation method of pyridine-wrapped lead cadmium sulfur nanoparticles and products thereof

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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 of pyridine-wrapped lead-cadmium-sulfur nanoparticles. The metal source is mixed with a pyridine / water mixed solvent to obtain a metal source solution; the lead source in the metal source is lead acetate, lead chloride or nitric acid Lead and cadmium sources are cadmium chloride or cadmium acetate; then the sulfur source is mixed with a protic solvent to obtain a sulfur source solution; the sulfur source is sodium sulfide, ethanethiol or thiourea; finally the sulfur source solution is Adding it dropwise into the metal source solution, reacting at 50-90°C for 1-12 hours, and centrifuging to obtain pyridine-wrapped lead, cadmium and sulfur nanoparticles. The invention has the advantages of simple preparation process, easy operation and mild reaction conditions; the required metal source and sulfur source have low toxicity, the ligand is non-toxic, and the cost is low, which is suitable for industrial production. The lead-cadmium-sulfur nanoparticles wrapped with pyridine as a ligand were 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. (Journal of Alloys and Compounds495(2010) 234-23...

Claims

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Application Information

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Patent Type & Authority Patents(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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