Method for synthesizing copper-zinc-tin-sulfur quantum dots by utilizing ultrasonic cavitation

A nano-quantum dot, copper-zinc-tin-sulfur technology, applied in nanotechnology, nano-optics, nanotechnology, etc., can solve the problems of large-scale use limitation, complex process, and no nano-quantum dots have been seen yet, and the particle size can be achieved. Controlled, environmentally friendly, highly reproducible results

Active Publication Date: 2013-12-11
SHAANXI COAL & CHEM TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the whole process is complicated, and the heavy metal cadmium is used, which is a highly toxic material, so its large-scale use is limited.
There is no report on the synthesis of nano-quantum dots of this material

Method used

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  • Method for synthesizing copper-zinc-tin-sulfur quantum dots by utilizing ultrasonic cavitation
  • Method for synthesizing copper-zinc-tin-sulfur quantum dots by utilizing ultrasonic cavitation
  • Method for synthesizing copper-zinc-tin-sulfur quantum dots by utilizing ultrasonic cavitation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1, will analyze pure 0.4 millimolar copper sulfate pentahydrate crystals, 0.2 millimoles zinc sulfate heptahydrate crystals, 0.2 millimoles tin sulfate dihydrate crystals and 0.8 millimoles thiourea (CH 4 N 2 S) crystal joins in the ethylene glycol of 20 milliliters of analytical purity, makes the solution that the molar concentration that takes zinc sulfate as standard is 10 mmol / liter, and solution is milky white, is named solution A.

[0032] Step 2. The solution A was separated with a centrifuge (the centrifuge rotated at 4000 rpm and turned on for 3 minutes) to obtain a white powder. With analytically pure n-dodecylmercaptan (CH 3 (CH 2 )10CH 2 SH) Wash the powder repeatedly 6 times.

[0033] Step 6, after washing, a copper-zinc-tin-sulfur nano-quantum dot solution (n-dodecyl mercaptan is used as a solvent) can be obtained.

Embodiment 2

[0035] Step 1, will analyze 0.2 millimolar copper sulfate pentahydrate crystals of purity, 0.1 millimoles zinc sulfate heptahydrate crystals, 0.1 millimoles tin sulfate dihydrate crystals and 0.4 millimoles thiourea (CH 4 N 2 S) crystal joins in the ethylene glycol of 30 milliliters of analytical purity, makes the solution that the molar concentration that takes zinc sulfate as standard is 5 mmol / liter, and solution is milky white, is named solution A.

[0036] Step 2, put the solution A prepared in step 1 into a 50 ml flask, and place the flask on the table of the laboratory ultrasonic processor. Adjust the height of the ultrasonic processor probe so that the probe is submerged 2 cm below the liquid surface.

[0037] Step 3. Set the power of the ultrasonic processor to 300 watts and the frequency to 10 kHz, and turn on the ultrasonic processor for 2 minutes to obtain solution B.

[0038] Step 4. Separate the solution B with a centrifuge (the centrifuge rotates at a speed of 2...

Embodiment 3

[0041] Step 1, will analyze pure 0.4 millimolar copper sulfate pentahydrate crystals, 0.2 millimoles zinc sulfate heptahydrate crystals, 0.2 millimoles tin sulfate dihydrate crystals and 0.8 millimoles thiourea (CH 4 N 2 S) crystal joins in the ethylene glycol of 15 milliliters of analytical purity, makes the solution that the molar concentration that takes zinc sulfate as standard is 10 mmol / liter, and solution is milky white, is named solution A.

[0042] Step 2, put the solution A prepared in step 1 into a 50 ml flask, and place the flask on the table of the laboratory ultrasonic processor. Adjust the height of the ultrasonic processor probe so that the probe is immersed 4 cm below the liquid surface.

[0043] Step 3. Set the power of the ultrasonic processor to 100 watts and the frequency to 30 kHz, and turn on the ultrasonic processor for 6 minutes to obtain solution C.

[0044] Step 4. The solution C was separated with a centrifuge (the centrifuge rotated at 4500 rpm a...

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Abstract

A method for synthesizing copper-zinc-tin-sulfur quantum dots by utilizing ultrasonic cavitation comprises the following steps: mixing cupric sulfate pentahydrate crystals, zinc sulphate heptahydrate crystals, stannic sulfate dihydrate crystals and thiocarbamide crystals, adding the mixture into ethylene alcohol, and mixing uniformly to obtain a solution A; immersing the probe of an ultrasonic treatment instrument into the solution A, and then separating powder from the solution subjected to treatment by the ultrasonic treatment instrument; finally, washing the powder with n-dodecyl mercaptan so as to remove excessive sulfur ions. With adoption of the method disclosed by the invention, the copper-zinc-tin-sulfur quantum dots are synthesized by utilizing ultrasonic cavitation. The method has the advantages of simple and convenient operation, high repeatability, low cost, controllability of granular size of the copper-zinc-tin-sulfur quantum dots and the like. In addition, no highly toxic chemical substances are used during the whole process, the preparation process is fast, the environmentally friendliness is achieved, and the prepared copper-zinc-tin-sulfur material is pure in phase.

Description

【Technical field】 [0001] The invention relates to the fields of fluorescent dye biomedicine, novel nanometer quantum dot solar cell, semiconductor photoelectrochemical cell (Photoelectrochemical) solar hydrogen production, etc. 2 ZnSnS 4 ) the method of nano quantum dot (quantum dot). 【Background technique】 [0002] Semiconductor material quantum dots are semiconductor nanostructures that bind conduction band electrons, valence band holes and excitons in three spatial directions. Electron motion is restricted in all three dimensions, and is therefore sometimes called an "artificial atom," a "superlattice," a "superatom," or a "quantum dot atom." Such constraints can be attributed to electrostatic potentials (generated by external electrodes, doping, strain, impurities), interfaces of two different semiconductor materials (e.g. in self-assembled quantum dots), semiconductor surfaces (e.g. semiconductor nanocrystals ), or a combination of the above three. Quantum dots have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/66B82Y40/00B82Y20/00
Inventor 常远程
Owner SHAANXI COAL & CHEM TECH INST
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