Unlock instant, AI-driven research and patent intelligence for your innovation.
cds nanoparticles and preparation method thereof
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A nanoparticle and cation technology, applied in the field of CdS nanoparticles and their preparation, can solve the problems of CdS nanoparticles without optical properties, complicated conditions, and complex synthesis process.
Active Publication Date: 2021-01-05
ANHUI NORMAL UNIV
View PDF5 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
Among them, in the synthesis process of the organic phase synthesis method, the cadmium source is first mixed with the organic solvent, reacted at high temperature, and then the sulfur source is added to form CdS quantum dots, and then gradually assembled into CdS nanoparticles; the synthesis process of this method is complicated, the conditions are cumbersome, and the CdS nano Particles have no optical properties
The aqueous phase synthesis method is to first mix the cadmium source with sodium citrate, protect it with nitrogen, stir and add the sulfur source, and react for 12 hours to form CdS super nanoparticles; this method is simple to synthesize, and the prepared CdS nanoparticles have uniform morphology , but cadmium itself has certain toxicity, and there is no relatively good application
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
preparation example Construction
[0023] The invention provides a method for preparing CdS nanoparticles, comprising:
[0024] 1) Carry out first contact reaction with animal protein and cationic surfactant in water;
[0025] 2) In the presence of protective gas, add the cadmium source to the reaction system and adjust the pH of the system to alkaline for the second contact reaction, then add the sulfur source to the reaction system for the third contact reaction to produce CdS Nanoparticles.
[0026] In step 1) of the present invention, each material can be selected in a wide range, but in order to further improve the fluorescent effect of the prepared CdS nanoparticles, preferably, in step 1), relative to 0.3-0.4g animal For protein, the amount of cationic surfactant is 2-5 μmol, and the amount of water is 5-10 mL.
[0027] In step 1) of the present invention, the conditions of the first contact reaction can be selected in a wide range, but in order to further improve the fluorescent effect of the CdS nano...
Embodiment 1
[0041] 1) Dissolve 0.34g of BSA (bovine serum albumin) in 5mL of ultra-pure water, stir with magnetic force until the temperature rises to 50°C for about 6 minutes, then add 300μL, 10mmol / L tetradecyltrimethylammonium bromide The solution was reacted for 10 minutes.
[0042] 2) Put the above system in the nitrogen atmosphere for 2min, then add 5ml, 2.06×10-3 mol / L of CdC1 2 2.5H 2 O (2.5 hydrated cadmium chloride) solution and put it in a nitrogen atmosphere for 15min, then use 0.27mol·L -1 Sodium hydroxide solution adjusted the pH of the system to 9.0 and reacted for 5 hours, then added 515 μL, 10 mmol / L TAA (thioacetamide) solution, and continued to stir for 12 hours; after the reaction was completed, cooled to 25 ° C, centrifuged and purified to obtain CdS super nano Particle A1.
Embodiment 2
[0044] Carry out the supernano particle A2 that makes CdS according to the method for embodiment 1, difference is that the tetradecyltrimethylammonium bromide solution is replaced by the dedecyltrimethylammonium bromide solution of equal concentration and equal volume .
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Property
Measurement
Unit
size
aaaaa
aaaaa
size
aaaaa
aaaaa
Login to View More
Abstract
The invention discloses CdS nanoparticles and a preparation method thereof. The preparation method comprises the following steps: (1) carrying out a first contact reaction on animal protein and a cationic surfactant in water; (2) adding a cadmium source to the reaction system in the presence of shielding gas, adjusting the pH value of the system to alkalinity, performing a second contact reaction,then adding a sulfur source to the reaction system, and carrying out a third contact reaction so as to obtain the CdS nanoparticles. The CdS nanoparticles prepared by using the method have an excellent fluorescence effect, and meanwhile the preparation method has the advantages of simple operation, mild conditions and easily available raw materials.
Description
technical field [0001] The invention relates to nanoparticles, in particular to a CdS nanoparticle and a preparation method thereof. Background technique [0002] The existing synthesis methods of CdS nanoparticles are mainly divided into two categories: organic phase synthesis and aqueous phase synthesis. Among them, in the synthesis process of the organic phase synthesis method, the cadmium source is first mixed with the organic solvent, reacted at high temperature, and then the sulfur source is added to form CdS quantum dots, and then gradually assembled into CdS nanoparticles; the synthesis process of this method is complicated, the conditions are cumbersome, and the CdS nano Particles have no optical properties. The aqueous phase synthesis method is to first mix the cadmium source with sodium citrate, protect it with nitrogen, stir and add the sulfur source, and react for 12 hours to form CdS super nanoparticles; this method is simple to synthesize, and the prepared Cd...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More