阅读说明：本技术 一种用于增强量子点荧光的应用方法 (Application method for enhancing quantum dot fluorescence ) 是由 张正国 刘海 柯义虎 于 2021-06-17 设计创作，主要内容包括：本发明公开了一种用于增强量子点荧光的应用方法,选取500毫升的乙酸锌溶液,放进相应的反应容器中；继续向溶液中加入300毫升的乙酸铕溶液,在加入过程中,继续进行搅拌工作；向溶液中缓慢滴入100毫升的硫化钠溶液,在滴入过程中,继续开始进行相应的搅拌工作,且在滴入过程中,将整体的溶液进行加热；将硫化钠滴入密闭容器之后,静置10分钟左右,并停止加热工作；将得到的沉淀利用离心的方式取出；将离心得到的沉淀物利用离子水和无水乙醇连续洗涤数次。本发明可以使产生的量子点更加饱满,荧光效果更好,并在反应混合的过程中,进行适量的加热工作,减少反应时间,提高溶液的混合效果,使整体反应的效果更好,促进量子点的生产。(The invention discloses an application method for enhancing quantum dot fluorescence, which comprises the steps of selecting 500 ml of zinc acetate solution and putting the zinc acetate solution into a corresponding reaction container; continuously adding 300 ml of europium acetate solution into the solution, and continuously stirring the solution in the adding process; slowly dripping 100 ml of sodium sulfide solution into the solution, continuously stirring in the dripping process, and heating the whole solution in the dripping process; after sodium sulfide is dripped into the closed container, standing for about 10 minutes, and stopping heating; taking out the obtained precipitate in a centrifugal mode; the precipitate obtained by centrifugation was washed several times successively with ionized water and anhydrous ethanol. The invention can make the produced quantum dots more full and have better fluorescence effect, and in the reaction mixing process, proper heating work is carried out, the reaction time is reduced, the mixing effect of the solution is improved, the overall reaction effect is better, and the production of the quantum dots is promoted.)

1. An application method for enhancing quantum dot fluorescence, which is characterized by comprising the following steps:

s1, selecting 500 ml of zinc acetate solution, and putting the solution into a corresponding reaction container;

s2, continuously adding 300 ml of europium acetate solution into the solution, and continuously stirring the solution in the adding process;

s3, slowly dropping 100 ml of sodium sulfide solution into the solution, continuously stirring in the dropping process, and heating the whole solution in the dropping process;

s4, after the sodium sulfide is dripped into the closed container, standing for about 10 minutes, and stopping heating;

s5, taking out the obtained precipitate in a centrifugal mode;

and S6, continuously washing the precipitate obtained by centrifugation for several times by using ionized water and absolute ethyl alcohol to obtain the corresponding quantum dots.

2. The use according to claim 1, wherein in step S1, 5 to 10 ml of organotin is added to the solution, and in the organotin addition process, the corresponding stirring operation is carried out.

3. The use according to claim 2, wherein after the stirring is completed, the stirred solution is sealed, and ammonia gas at normal temperature is introduced into the solution to remove oxygen from the solution.

4. The use of claim 1, wherein in step S2, the europium acetate solution is added at a concentration of 50%.

5. The use of claim 1, wherein in step S3, the entire solution is heated to a temperature between 90 ℃ and 95 ℃, and after completion of the sodium sulfide dropping, the temperature is raised to a temperature between 160 ℃ and 200 ℃, and the heating is maintained for about 5 minutes.

Technical Field

The invention relates to the technical field of quantum dot fluorescence, in particular to an application method for enhancing quantum dot fluorescence.

Background

Quantum dots are semiconductor nanostructures that confine excitons in three spatial directions, sometimes referred to as "artificial atoms", "superlattices", "superatoms" or "quantum dot atoms", a new concept that was introduced in the 90's of the 20 th century, when the quantum dots are illuminated by the light pulses, various colors are produced, which can be observed by a less sophisticated optical microscope, the effect being quantum dot fluorescence, if the quantum dots are attached to an object to be studied, researchers can understand the activity of the substance, but the quantum dots can also be used for tracking the activity of a drug in the body or studying the structure of cells and tissues in a patient, the quantum dots can generate light with various colors, and the color of the light depends on the type and the size of the quantum dots and is more closely related to the production process of the quantum dots.

The production process of the quantum dots mainly comprises a metal organic phase synthesis method and a water phase direct synthesis method, wherein the water phase direct synthesis method has the advantages of simplicity in operation, high repeatability, low cost, controllable surface charge and surface property and the like, but in the actual production process, corresponding sealing operation is not carried out, so that the produced quantum dots are not full enough, the fluorescence effect is poor, in the mixing process of mixed liquid, the mixing effect is not ideal, the utilization rate of raw materials is low, and therefore a novel application method for enhancing the fluorescence of the quantum dots is provided.

Disclosure of Invention

The invention aims to solve the defects in the prior art, such as: the produced quantum dots are not full enough and have poor fluorescence effect due to no corresponding sealing operation, and the mixing effect is not ideal and the utilization rate of raw materials is low in the mixing process of the mixed liquid.

In order to achieve the purpose, the invention adopts the following technical scheme:

an application method for enhancing quantum dot fluorescence, comprising the following steps:

s1, selecting 500 ml of zinc acetate solution, and putting the solution into a corresponding reaction container;

s2, continuously adding 300 ml of europium acetate solution into the solution, and continuously stirring the solution in the adding process;

s3, slowly dropping 100 ml of sodium sulfide solution into the solution, continuously stirring in the dropping process, and heating the whole solution in the dropping process;

s4, after the sodium sulfide is dripped into the closed container, standing for about 10 minutes, and stopping heating;

s5, taking out the obtained precipitate in a centrifugal mode;

and S6, continuously washing the precipitate obtained by centrifugation for several times by using ionized water and absolute ethyl alcohol to obtain the corresponding quantum dots.

In the preparation method as described above, preferably, in step S1, 5 to 10 ml of organotin is added to the solution, and in the organotin adding process, the corresponding stirring operation is performed.

In the above-mentioned preparation method, preferably, after the stirring is completed, the stirred solution is sealed, and ammonia gas at normal temperature is introduced into the solution to discharge oxygen in the solution.

In the above-described manufacturing method, preferably, in step S2, the europium acetate solution is added at a concentration of 50%.

In the above-described production method, preferably, in step S3, the entire solution is heated to 90 to 95 ℃, and after completion of dropping sodium sulfide, the temperature is raised to 160 to 200 ℃, and the heating process is maintained for about 5 minutes.

Compared with the prior art, the invention has the beneficial effects that: before the reaction process begins, let in nitrogen gas in to the container, carry out sealed work with the container, when making the container seal, discharge the oxygen in the container, make the quantum dot that produces more full, fluorescence effect is better to at the in-process that the reaction mixes, carry out appropriate amount heating work, reduce reaction time, improve the mixed effect of solution, make the effect of whole reaction better, promote the production of quantum dot.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.

In one embodiment, a method for enhancing fluorescence of quantum dots comprises the following steps:

s1, selecting 500 ml of zinc acetate solution, and putting the solution into a corresponding reaction container;

s2, continuously adding 300 ml of europium acetate solution into the solution, and continuously stirring the solution in the adding process;

s3, slowly dropping 100 ml of sodium sulfide solution into the solution, continuously stirring in the dropping process, and heating the whole solution in the dropping process;

s4, after the sodium sulfide is dripped into the closed container, standing for about 10 minutes, and stopping heating;

s5, taking out the obtained precipitate in a centrifugal mode;

and S6, continuously washing the precipitate obtained by centrifugation for several times by using ionized water and absolute ethyl alcohol to obtain the corresponding quantum dots.

In the above preparation method, in step S1, 5-10 ml of organotin is added to the solution, and during the organotin adding process, the corresponding stirring operation is performed, and the overall reaction stability can be improved by adding a small amount of organotin.

According to the preparation method, after stirring is completed, the stirred solution is sealed, ammonia gas with normal temperature is introduced into the solution, oxygen in the solution is discharged, the whole device is sealed, meanwhile, oxygen in the device is discharged, and the discharged oxygen gas has adverse effect on the whole device, so that the obtained quantum dots are full, and the fluorescence effect is better.

In the above preparation method, the concentration of the europium acetate solution added in step S2 is 50%.

In the above preparation method, in step S3, the whole solution is heated to 90-95 ℃, the temperature is raised during the process of adding sodium sulfide, so that the whole solution can be better mixed with sodium sulfide, after the sodium sulfide is dropped, the temperature is raised to 160-200 ℃, and the heating process is maintained for about 5 minutes.

In a second embodiment, a method for enhancing fluorescence of quantum dots comprises the following steps:

s1, selecting 500 ml of zinc acetate solution, and putting the solution into a corresponding reaction container;

s2, continuously adding 400 ml of europium acetate solution into the solution, and continuously stirring the solution in the adding process;

s3, slowly dropping 100 ml of sodium sulfide solution into the solution, continuously stirring in the dropping process, and heating the whole solution in the dropping process;

s4, after the sodium sulfide is dripped into the closed container, standing for about 10 minutes, and stopping heating;

s5, taking out the obtained precipitate in a centrifugal mode;

and S6, continuously washing the precipitate obtained by centrifugation for several times by using ionized water and absolute ethyl alcohol to obtain the corresponding quantum dots.

In the above preparation method, in step S1, 5-10 ml of organotin is added to the solution, and during the organotin adding process, the corresponding stirring operation is performed, and the overall reaction stability can be improved by adding a small amount of organotin.

According to the preparation method, after stirring is completed, the stirred solution is sealed, ammonia gas with normal temperature is introduced into the solution, oxygen in the solution is discharged, the whole device is sealed, meanwhile, oxygen in the device is discharged, and the discharged oxygen gas has adverse effect on the whole device, so that the obtained quantum dots are full, and the fluorescence effect is better.

In the above preparation method, the concentration of the europium acetate solution added in step S2 is 60%.

In the above preparation method, in step S3, the whole solution is heated to 90-95 ℃, the temperature is raised during the process of adding sodium sulfide, so that the whole solution can be better mixed with sodium sulfide, after the sodium sulfide is dropped, the temperature is raised to 200-240 ℃, and the heating process is maintained for about 5 minutes.

In a third embodiment, an application method for enhancing fluorescence of quantum dots comprises the following steps:

s1, selecting 500 ml of zinc acetate solution, and putting the solution into a corresponding reaction container;

s2, continuously adding 500 ml of europium acetate solution into the solution, and continuously stirring the solution in the adding process;

s3, slowly dropping 100 ml of sodium sulfide solution into the solution, continuously stirring in the dropping process, and heating the whole solution in the dropping process;

s4, after the sodium sulfide is dripped into the closed container, standing for about 10 minutes, and stopping heating;

s5, taking out the obtained precipitate in a centrifugal mode;

and S6, continuously washing the precipitate obtained by centrifugation for several times by using ionized water and absolute ethyl alcohol to obtain the corresponding quantum dots.

In the above preparation method, in step S1, 5-10 ml of organotin is added to the solution, and during the organotin adding process, the corresponding stirring operation is performed, and the overall reaction stability can be improved by adding a small amount of organotin.

According to the preparation method, after stirring is completed, the stirred solution is sealed, ammonia gas with normal temperature is introduced into the solution, oxygen in the solution is discharged, the whole device is sealed, meanwhile, oxygen in the device is discharged, and the discharged oxygen gas has adverse effect on the whole device, so that the obtained quantum dots are full, and the fluorescence effect is better.

In the above preparation method, the concentration of the europium acetate solution added in step S2 is 70%.

In the above preparation method, in step S3, the whole solution is heated to 90-95 ℃, the temperature is raised during the process of adding sodium sulfide, so that the whole solution can be better mixed with sodium sulfide, after the sodium sulfide is dropped, the temperature is raised to 240-280 ℃, and the heating process is maintained for about 5 minutes.

In a fourth embodiment, an application method for enhancing fluorescence of quantum dots comprises the following steps:

s1, selecting 500 ml of zinc acetate solution, and putting the solution into a corresponding reaction container;

s2, continuously adding 200 ml of europium acetate solution into the solution, and continuously stirring the solution in the adding process;

s3, slowly dropping 100 ml of sodium sulfide solution into the solution, continuously stirring in the dropping process, and heating the whole solution in the dropping process;

s4, after the sodium sulfide is dripped into the closed container, standing for about 10 minutes, and stopping heating;

s5, taking out the obtained precipitate in a centrifugal mode;

and S6, continuously washing the precipitate obtained by centrifugation for several times by using ionized water and absolute ethyl alcohol to obtain the corresponding quantum dots.

In the above preparation method, in step S1, 5-10 ml of organotin is added to the solution, and during the organotin adding process, the corresponding stirring operation is performed, and the overall reaction stability can be improved by adding a small amount of organotin.

According to the preparation method, after stirring is completed, the stirred solution is sealed, ammonia gas with normal temperature is introduced into the solution, oxygen in the solution is discharged, the whole device is sealed, meanwhile, oxygen in the device is discharged, and the discharged oxygen gas has adverse effect on the whole device, so that the obtained quantum dots are full, and the fluorescence effect is better.

In the above preparation method, in step S2, the europium acetate solution is added at a concentration of 40%.

In the above preparation method, in step S3, the whole solution is heated to 90-95 ℃, the temperature is raised during the process of adding sodium sulfide, so that the whole solution can be better mixed with sodium sulfide, after the sodium sulfide is dropped, the temperature is raised to 120-160 ℃, and the heating process is maintained for about 5 minutes.

In a fifth embodiment, a method for enhancing fluorescence of quantum dots comprises the following steps:

s1, selecting 500 ml of zinc acetate solution, and putting the solution into a corresponding reaction container;

s2, continuously adding 600 ml of europium acetate solution into the solution, and continuously stirring the solution in the adding process;

s3, slowly dropping 100 ml of sodium sulfide solution into the solution, continuously stirring in the dropping process, and heating the whole solution in the dropping process;

s4, after the sodium sulfide is dripped into the closed container, standing for about 10 minutes, and stopping heating;

s5, taking out the obtained precipitate in a centrifugal mode;

and S6, continuously washing the precipitate obtained by centrifugation for several times by using ionized water and absolute ethyl alcohol to obtain the corresponding quantum dots.

In the above preparation method, in step S1, 5-10 ml of organotin is added to the solution, and during the organotin adding process, the corresponding stirring operation is performed, and the overall reaction stability can be improved by adding a small amount of organotin.

According to the preparation method, after stirring is completed, the stirred solution is sealed, ammonia gas with normal temperature is introduced into the solution, oxygen in the solution is discharged to seal the whole device, meanwhile, oxygen in the device is discharged, and the discharged oxygen has adverse effect on the whole device, so that the obtained quantum dots are more full, and the fluorescence effect is better.

In the above preparation method, in step S2, the europium acetate solution is added at a concentration of 80%.

In the above preparation method, in step S3, the whole solution is heated to 90-95 ℃, the temperature is raised during the process of adding sodium sulfide, so that the whole solution can be better mixed with sodium sulfide, after the sodium sulfide is dropped, the temperature is raised to 280-320 ℃, and the heating process is maintained for about 5 minutes.

In the invention, before the reaction process is started, nitrogen is introduced into the container, the container is sealed, oxygen in the container is discharged while the container is sealed, so that the generated quantum dots are fuller, the fluorescence effect is better, in the reaction mixing process, a proper amount of heating work is carried out, the reaction time is reduced, the mixing effect of the solution is improved, the overall reaction effect is better, and the production of the quantum dots is promoted.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.