CN103803557A - Monodisperse silica nanoparticles and preparation method thereof - Google Patents
Monodisperse silica nanoparticles and preparation method thereof Download PDFInfo
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- CN103803557A CN103803557A CN201210438685.9A CN201210438685A CN103803557A CN 103803557 A CN103803557 A CN 103803557A CN 201210438685 A CN201210438685 A CN 201210438685A CN 103803557 A CN103803557 A CN 103803557A
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- silicon dioxide
- nano particles
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- tetraethoxy
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Abstract
The invention belongs to the semiconductor nano-material preparation field, and particularly relates to monodisperse silica nanoparticles and a preparation method thereof. With aqua ammonia as a catalyst and through controlling the adding amount of aqua ammonia, the nano silica nanoparticles having the monodisperse characteristic are synthesized. The nanoparticles can be used in ceramic materials, papermaking, rheological materials and the like.
Description
Technical field
The invention belongs to semiconductor nano material preparing technical field.Be specifically related to a kind of monodisperse silica nanoparticle and preparation method thereof.
Background technology
Monodisperse nanoparticle is the nano particle of uniform particle diameter, is the study hotspot of current chemistry, material, biological field, for aspects such as printing and dyeing, drawing, papermaking, rheo-materials.Monodispersed silicon dioxide microparticle, it is focus in new material development process, for the compactness that improves stupalith, the aspects such as reduction sintering temperature and development inorganics parting material, optical glass material, Carrier Materials of Immobilized Enzyme all tool have very important significance.Prior art by control intermediate processing, in the ethanolic soln of high pH value, be hydrolyzed tetraethoxysilane dilute solution, by control reactant concn, obtain particle diameter at 50nm to the Nano particles of silicon dioxide between 2 μ m.But adopt simple mode, and synthesize the monodispersed Nano particles of silicon dioxide with specified particle diameter fast, in batches, be the requirement that realizes Nano particles of silicon dioxide industrial applications.
Summary of the invention
For meeting the requirement of prior art, the application, by the method with Stober, utilizes teos hydrolysis, and the add-on of controlling ammoniacal liquor forms the Nano particles of silicon dioxide of different-grain diameter, the method is quick, and can prepare in batches, and the Nano particles of silicon dioxide making has monodispersity.
The method adopt raw material be, technical pure tetraethoxy, ammoniacal liquor, dehydrated alcohol, distilled water, preparation process comprises: get tetraethoxy 1.4ml, ammoniacal liquor 1.1ml, distilled water 0.5ml, dehydrated alcohol 45ml, mix, then be heated to 37 ℃, at this temperature, constant temperature keeps stirring 3 hours, then adds tetraethoxy 0.8ml, react 2 hours, finally add thermal distillation, all steam to ethanol, add distilled water 10ml, be uniformly dispersed, obtain the Nano particles of silicon dioxide of monodispersity.
By above step, only change the amount of ammoniacal liquor, adopt 3.5ml ammoniacal liquor, repeat to synthesize.
By above-mentioned Nano particles of silicon dioxide synthetic under different ammonia vols, dilute respectively 10 times with distilled water, get one with dropper, be added drop-wise on silicon chip dry laggard line scanning electronic microscope photos; By Nano particles of silicon dioxide synthetic under different ammonia vols, use respectively 30 times of distilled water dilutings, carry out scattering of light phenetic analysis.
Characterize by scattering of light, can find out, adopting the grain size of the synthetic silica dioxide granule of 1.1ml ammoniacal liquor is 68nm, adopts the grain size of the synthetic silica dioxide granule of 3.5ml ammoniacal liquor to reach 150nm.
By stereoscan photograph, can find out, synthetic nano SiO 2 particle is spherical, and particle diameter is even, has single dispersing character.
The application adopts ammoniacal liquor as catalyzer, by controlling the add-on of ammoniacal liquor, and the synthetic nanometer titanium dioxide silicon nano with single dispersing characteristic fast, this nano particle has rich promising application in fields such as stupalith, papermaking, rheo-materials.
Embodiment:
Embodiment 1
Get tetraethoxy 1.4ml, ammoniacal liquor 1.1ml, distilled water 0.5ml, dehydrated alcohol 45ml, mix, then be heated to 37 ℃, and constant temperature keeps stirring 3 hours at this temperature, then add tetraethoxy 0.8ml, react 2 hours, finally add thermal distillation, all steam to ethanol, add distilled water, be uniformly dispersed, obtain the Nano particles of silicon dioxide of monodispersity.
Embodiment 2
Get tetraethoxy 1.4ml, ammoniacal liquor 3.5ml, distilled water 0.5ml, dehydrated alcohol 45ml, mix, then be heated to 37 ℃, and constant temperature keeps stirring 3 hours at this temperature, then add tetraethoxy 0.8ml, react 2 hours, finally add thermal distillation, all steam to ethanol, add distilled water, be uniformly dispersed, obtain the Nano particles of silicon dioxide of monodispersity.
Claims (4)
1. the preparation method of a Nano particles of silicon dioxide, it is characterized in that synthesis step is: get tetraethoxy 1.4ml, ammoniacal liquor 1.1ml, distilled water 0.5ml, dehydrated alcohol 45ml, mix, be then heated to 37 ℃, and constant temperature keeps stirring 3 hours at this temperature, add again tetraethoxy 0.8ml, react 2 hours, finally add thermal distillation, all steam to ethanol, add distilled water 10ml, be uniformly dispersed.
2. the preparation method of Nano particles of silicon dioxide as claimed in claim 1, is characterized in that the ammonia volume adopting is 3.5ml.
3. the Nano particles of silicon dioxide of preparing as claim 1, is characterized in that particle diameter is 68nm.
4. the Nano particles of silicon dioxide of preparing as claim 2, is characterized in that particle diameter is 150nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210438685.9A CN103803557A (en) | 2012-11-07 | 2012-11-07 | Monodisperse silica nanoparticles and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210438685.9A CN103803557A (en) | 2012-11-07 | 2012-11-07 | Monodisperse silica nanoparticles and preparation method thereof |
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| Publication Number | Publication Date |
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| CN103803557A true CN103803557A (en) | 2014-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210438685.9A Pending CN103803557A (en) | 2012-11-07 | 2012-11-07 | Monodisperse silica nanoparticles and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104003409A (en) * | 2014-06-11 | 2014-08-27 | 北京化工大学 | Method for preparing controllable monodisperse spherical large-particle-size nano-silicon dioxide |
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2012
- 2012-11-07 CN CN201210438685.9A patent/CN103803557A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104003409A (en) * | 2014-06-11 | 2014-08-27 | 北京化工大学 | Method for preparing controllable monodisperse spherical large-particle-size nano-silicon dioxide |
| CN104003409B (en) * | 2014-06-11 | 2016-01-20 | 北京化工大学 | A kind of preparation method of controlled monodisperse spherical Large stone nano silicon |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140521 |