CN105819410A - Preparation method for bismuth telluride quantum point - Google Patents
Preparation method for bismuth telluride quantum point Download PDFInfo
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- CN105819410A CN105819410A CN201510829538.8A CN201510829538A CN105819410A CN 105819410 A CN105819410 A CN 105819410A CN 201510829538 A CN201510829538 A CN 201510829538A CN 105819410 A CN105819410 A CN 105819410A
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- tellurobismuthite
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Abstract
The invention provides a method for preparing a bismuth telluride quantum point by using ultrasonic technology. The method comprises the following steps: 1) weighing a certain amount of solid bismuth telluride powder and placing the solid bismuth telluride powder in an agate mortar for thorough grinding; 2) adding a proper amount of 1-methyl-2-pyrrolidinone (NMP) solution into the ground powder, carrying out mixing and subjecting the obtained mixed liquid to ultrasonic treatment with an ultrasonic instrument for altogether 4 h; and 3) subjecting a suspension system obtained after ultrasonic treatment to centrifugation and collecting clear liquid located at an upper level so as to obtain a bismuth telluride quantum point solution. The preparation method easily and successively prepares the bismuth telluride quantum dot at low cost; and the prepared quantum dot has good dispersibility, can emit fluorescent light under the irradiation of an ultraviolet lamp and is expected to be applied to fields like thermoelectric generation, thermoelectric refrigeration and sensors.
Description
Technical field
The present invention relates to the preparation method of a kind of Tellurobismuthite. quantum dot, it is specifically related to a kind of with Tellurobismuthite. powder as raw material, N-methyl ketopyrrolidine (NMP) is solvent, ultrasonic technique is used to prepare size uniform, good dispersion, and there is the Tellurobismuthite. quantum dot of fluorescent characteristic, the method belongs to technical field of nanometer material preparation.
Background technology
In recent years, along with people are to global environmental pollution and the attention of energy crisis, thermo-electric conversion has attracted the sight of people as a kind of green energy resource switch technology that used heat, waste heat can be converted to electric energy.Tellurobismuthite., as a kind of thermoelectricity functional material, not only has preferable electric conductivity, heat-resisting quantity and significant topological insulator characteristic, and application performance is preferable at ambient temperature, is a kind of good thermoelectric material.Based on above good characteristic, Tellurobismuthite. is widely used on low temperature thermoelectric power generation, thermoelectric cooling device.
Tellurobismuthite. is as a kind of thermoelectric material, and the transformation efficiency causing device because its performance is on the low side is the highest, through experimental results demonstrate, its nanorize can effectively be changed material property.By by the size Control of Tellurobismuthite. in nanometer range, its thermoelectricity capability index can be significantly improved.But, the Tellurobismuthite. prepared at present is in the majority with nanometer sheet, nanoparticle, and technique is loaded down with trivial details, and cost is high.Seek a kind of to prepare the key that energy consumption is low, simple process, Tellurobismuthite. nano material technology with low cost are popularization and application.
Publication No. is CN103626138A(Application No. 201210301336.2) Chinese patent use tellurium and bismuth elemental powders under melted sodium chloride dispersion material environment, high-temperature nuclei Tellurobismuthite. granule in vacuum tube furnace；Publication No. is CN103910341A(Application No. 201410107134.3) Chinese patent use tellurium bismuth compound add organic solvent, sodium hydroxide, polyvinylpyrrolidone dissolve, in temperature-controlled heating mantle heated sealed insulation while stirring obtain nanoscale hexagonal plate Tellurobismuthite..The technology of the present invention is different from above-mentioned, and the technology of the present invention relates to a kind of efficient, easy ultrasonic grinding device, prepares the Product size after Tellurobismuthite. quantum dot, and purification at below 10nm by single step reaction.
Summary of the invention
For loaded down with trivial details preparation technology commonly used in prior art, the present invention proposes a kind of ultrasonic technique one step easy, efficient and prepares Tellurobismuthite. quantum dot.
The invention provides a kind of simplicity, the preparation method of efficient Tellurobismuthite. quantum dot, follow the steps below:
The first step, takes a certain amount of solid telluride bismuth meal end and is fully ground in agate mortar.
Second step, adds proper N methyl pyrrolidone (NMP) solution in ground powder, is placed in ultrasonic instrument ultrasonic by above-mentioned mixed liquor, 4 hours cumulative times.
3rd step, transfers to be centrifuged in centrifuge by the suspension system after ultrasonic, collects supernatant liquid and is Tellurobismuthite. quantum dot solution.
The preparation technology of the present invention has the advantage that 1 compared with existing technology of preparing, preparation technology is simple.Tellurobismuthite. powder after grinding mixes with N-methyl ketopyrrolidine (NMP) that a step is ultrasonic to be completed.Reagent raw material of the present invention is market purchasing, cheap and readily available, it is provided that the ultrasonic technique of a kind of simplicity prepares the new method of Tellurobismuthite. quantum dot.2, large-scale production.Preparation technology of the present invention is simple, has mass production capabilities concurrently, only need to adjust the amount of reactant, can realize the control to product scale.
The present invention uses the ultrasonic technique of simplicity to be prepared for productivity height, good dispersion by single step reaction, and has the Tellurobismuthite. quantum dot of strong fluorescence characteristic, and can look forward to it has preferable application prospect in thermo-electric generation, thermoelectric cooling field.
Accompanying drawing explanation
Fig. 1 is the Tellurobismuthite. quantum dot solution utilizing ultrasonic technique to prepare.
Fig. 2 is Tellurobismuthite. quantum dot solution image under ultraviolet light (wavelength is 365nm) irradiates.
Fig. 3 is Tellurobismuthite. quantum dot transmissioning electric mirror test figure.
Fig. 4 is Tellurobismuthite. quantum dot XRD diffraction pattern.
Specific embodiment
Weigh in the balance and take 0.5 gram of Tellurobismuthite. powder and be placed in agate mortar and be fully ground, the powder of milled is transferred in beaker, adds 50 milliliters of N-methyl ketopyrrolidines (NMP), be placed in ultrasonic instrument accumulative ultrasonic 4 hours.After ultrasonic end, suspension system is transferred in centrifuge centrifugal.Take supernatant liquid after Li Xin to collect and obtain Tellurobismuthite. quantum dot.
Claims (4)
1. one kind utilizes the method that ultrasonic technique prepares Tellurobismuthite. quantum dot, it is characterised in that mainly comprise the steps that 1) take a certain amount of solid telluride bismuth meal end be fully ground in agate mortar;2) in the powder of milled, add the mixing of N-methyl ketopyrrolidine (NMP) solution, above-mentioned mixed liquor is placed in ultrasonic instrument ultrasonic;3) suspension system after ultrasonic is transferred in centrifuge centrifugal, collect supernatant liquid and i.e. can get Tellurobismuthite. quantum dot solution.
The method utilizing ultrasonic technique to prepare Tellurobismuthite. quantum dot the most according to claim 1, it is characterised in that: in step 1), Tellurobismuthite. pressed powder consumption is 0.5 gram, ultrasonic before be fully ground.
The method utilizing ultrasonic technique to prepare Tellurobismuthite. quantum dot the most according to claim 1, it is characterised in that: step 2) in, N-methyl ketopyrrolidine consumption is 50 milliliters, with ultrasonic instrument ultrasonic 4 hours.
The method utilizing ultrasonic technique to prepare Tellurobismuthite. quantum dot the most according to claim 1, it is characterised in that: in step 3), ultrasonic after suspension system centrifuge, collect supernatant liquid.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510829538.8A CN105819410A (en) | 2015-11-25 | 2015-11-25 | Preparation method for bismuth telluride quantum point |
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| CN201510829538.8A CN105819410A (en) | 2015-11-25 | 2015-11-25 | Preparation method for bismuth telluride quantum point |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106905973A (en) * | 2017-01-20 | 2017-06-30 | 云南师范大学 | A kind of method that ultrasound prepares telluride nickel quantum dot |
| CN107234244A (en) * | 2017-06-23 | 2017-10-10 | 南京理工大学 | A kind of ultrasonic liquid-phase strip preparation method of big yield antimony alkene quantum dot |
| CN107954478A (en) * | 2016-10-14 | 2018-04-24 | 云南师范大学 | A kind of liquid solution method for preparing molybdenum disulfide quantum dot |
| CN108128759A (en) * | 2018-01-11 | 2018-06-08 | 昆明物理研究所 | The preparation method of monodisperse telluride titanium quantum dot |
| CN108247069A (en) * | 2017-12-26 | 2018-07-06 | 深圳大学 | A kind of bismuth quantum dot and preparation method thereof |
| CN110117031A (en) * | 2018-02-05 | 2019-08-13 | 云南师范大学 | A kind of round nanocrystalline one-step method technology of preparing of high crystalline rhenium disulfide |
| CN110116993A (en) * | 2018-02-05 | 2019-08-13 | 云南师范大学 | A kind of preparation method for the two selenizing nanocrystalline Tis that size is controllable |
| CN110117028A (en) * | 2018-02-05 | 2019-08-13 | 云南师范大学 | A kind of technology of preparing that blue-light-emitting titanium disulfide is nanocrystalline |
| CN112246259A (en) * | 2020-11-19 | 2021-01-22 | 长春大学 | Bismuth telluride sensitized bismuth oxychloride nano composite material and preparation method and application thereof |
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| CN102225758A (en) * | 2011-04-13 | 2011-10-26 | 昆明物理研究所 | Supersonic chemical preparation method for grapheme quantum dots |
| CN102690657A (en) * | 2012-05-23 | 2012-09-26 | 南京工业大学 | Nickeliferous fluorescent quantum dot and preparation method and application thereof |
| CN103820121A (en) * | 2014-02-19 | 2014-05-28 | 南京航空航天大学 | Preparation method of layered transition metal compound quantum dot solution |
| CN104893708A (en) * | 2015-06-08 | 2015-09-09 | 青岛大学 | Preparation method of titanium disulfide nanosheet/quantum dot composite mercury ion fluorescent probe |
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- 2015-11-25 CN CN201510829538.8A patent/CN105819410A/en active Pending
Patent Citations (4)
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| CN102225758A (en) * | 2011-04-13 | 2011-10-26 | 昆明物理研究所 | Supersonic chemical preparation method for grapheme quantum dots |
| CN102690657A (en) * | 2012-05-23 | 2012-09-26 | 南京工业大学 | Nickeliferous fluorescent quantum dot and preparation method and application thereof |
| CN103820121A (en) * | 2014-02-19 | 2014-05-28 | 南京航空航天大学 | Preparation method of layered transition metal compound quantum dot solution |
| CN104893708A (en) * | 2015-06-08 | 2015-09-09 | 青岛大学 | Preparation method of titanium disulfide nanosheet/quantum dot composite mercury ion fluorescent probe |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107954478A (en) * | 2016-10-14 | 2018-04-24 | 云南师范大学 | A kind of liquid solution method for preparing molybdenum disulfide quantum dot |
| CN106905973A (en) * | 2017-01-20 | 2017-06-30 | 云南师范大学 | A kind of method that ultrasound prepares telluride nickel quantum dot |
| CN107234244A (en) * | 2017-06-23 | 2017-10-10 | 南京理工大学 | A kind of ultrasonic liquid-phase strip preparation method of big yield antimony alkene quantum dot |
| CN108247069A (en) * | 2017-12-26 | 2018-07-06 | 深圳大学 | A kind of bismuth quantum dot and preparation method thereof |
| WO2019128246A1 (en) * | 2017-12-26 | 2019-07-04 | 深圳大学 | Bismuth quantum dot and preparation method therefor |
| CN108128759A (en) * | 2018-01-11 | 2018-06-08 | 昆明物理研究所 | The preparation method of monodisperse telluride titanium quantum dot |
| CN110117031A (en) * | 2018-02-05 | 2019-08-13 | 云南师范大学 | A kind of round nanocrystalline one-step method technology of preparing of high crystalline rhenium disulfide |
| CN110116993A (en) * | 2018-02-05 | 2019-08-13 | 云南师范大学 | A kind of preparation method for the two selenizing nanocrystalline Tis that size is controllable |
| CN110117028A (en) * | 2018-02-05 | 2019-08-13 | 云南师范大学 | A kind of technology of preparing that blue-light-emitting titanium disulfide is nanocrystalline |
| CN112246259A (en) * | 2020-11-19 | 2021-01-22 | 长春大学 | Bismuth telluride sensitized bismuth oxychloride nano composite material and preparation method and application thereof |
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Application publication date: 20160803 |