CN105081307B - A kind of modified silver nanotube, Ag Ag2Se composite nano tubes and preparation method thereof - Google Patents
A kind of modified silver nanotube, Ag Ag2Se composite nano tubes and preparation method thereof Download PDFInfo
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Abstract
The invention provides a kind of modified silver nanotube, Ag Ag2Se composite nano tubes and preparation method thereof, the Ag Ag2Se composite nano tubes include Ag nanotubes and are compounded in the Ag of the Ag nanotube surfaces2Se layers.Modified silver nanotube and Ag Ag provided by the invention2Se composite nano tubes have very wide ultraviolet-visible absorption spectroscopy scope so that such a material can more utilize sunshine, and good application potential is had in photocatalysis and opto-electronic conversion.In addition, Ag Ag provided by the invention2The phase transition temperature of Se composite nano tubes is relatively low so that the phase change memory application aspect prospect of such a material in a mild condition is also very wide.Test result indicates that：Ag Ag provided by the invention2Range of wavelengths of the Se composite nano tubes from 200nm to 800nm has strong absorption；Phase transition temperature is respectively near 100 DEG C and 90 DEG C when heating and annealing.
Description
Technical field
The present invention relates to nano material synthesis technical field, more particularly to a kind of modified silver nanotube, Ag-Ag2Se is compound
Nanotube and preparation method thereof.
Background technology
Germany《Advanced material》(Advanced Materials, 2011, volume 23, page 3052~3056) reports one
Kind using the polyol process system of modification come it is extensive prepare Ag nano wires, and the Ag nano wires of preparation as recyclable
And foldable electronic device.
Se is extraordinary mould material in nano material synthesis technical field.《Advanced material》(Advanced
Materials, 2002, volume 14, page 1749) report method of the synthesis of Se simple substance nano particles with crystallization into nano wire.
《Materials chemistry impurity》(Journal of Materials Chemistry, 2006, volume 16, page 3893~3897) is summarized
Selenides nano material synthetic technology using Se simple substance nanometer materials as template.Selenides nano material is in semiconductor, catalysis
Had a wide range of applications Deng field.
The synthesis of many selenides monodimension nanometer materials is all using one-dimensional Se as template, is re-introduced into metal ion, sees《Material
The Chemicals》(Journal of Materials Chemistry, 2006, volume 16, page 3893-3897).Ag2Se is one-dimensional
The report of nano material is also of common occurrence.《Materials chemistry》(Chemistry of Materials, 2014, volume 26,5647
Page~5653) report Ag2The process study changed between t- β-α phases nanocrystalline Se.《Nanometer bulletin》(Nano
Letters, 2014, volume 14, page 115~121) report by more various sizes of Ag2The phase alternating temperature of Se nano particles
Spend to detect nanocrystalline limit of stability.《Physical chemistry magazine》(Journal of Physical Chemistry B,
2006, volume 110, page 15812~15816) report with CSe2Ag-Ag is synthesized as Se sources2Se nano particles.But
CSe2Preparation and release process it is all very complicated and unmanageable, CSe2Steam will thermally decompose AgNCSe at 250~300 DEG C
Prepare, CSe2Discharging Se sources needs lasting light induction.In order to enrich Ag2Se technical field, develop a kind of new Ag2Se
Nano material urgently needs.
The content of the invention
In view of this, it is an object of the invention to provide a kind of modified silver nanotube, Ag-Ag2Se composite nano tubes and its
Preparation method, modified silver nanotube and Ag-Ag provided by the invention2Se composite nano tubes have wider ultraviolet-ray visible absorbing
Spectral region, good application potential is had in photocatalysis and opto-electronic conversion.
The invention provides a kind of modified silver nanotube, including Ag and Ag2Se。
The invention provides a kind of Ag-Ag2Se composite nano tubes, including Ag nanotubes and it is compounded in Ag nanotube surfaces
Ag2Se layers.
Preferably, the Ag-Ag2Ag and Se mol ratio is 2 in Se composite nano tubes:1~3:1.
The invention provides Ag-Ag described in a kind of above-mentioned technical proposal2The preparation method of Se composite nano tubes, including it is following
Step：
Under conditions of stirring, Ag nano wires, ZnSe-Amine organic-inorganic hybrid nanomaterials and acid solution are mixed
Close, reaction, obtain Ag-Ag2Se composite nano tubes.
Preferably, the ZnSe-Amine organic-inorganic hybrid nanomaterials are [ZnSe] (DETA)0.5Nanometer sheet.
Preferably, the acid solution make it that the pH value of reaction system is 1~2.
Preferably, the speed of the stirring is more than or equal to 700rpm.
Preferably, the temperature of the reaction is 10~35 DEG C；
The time of the reaction is 1~6 day.
Preferably, the acid solution includes hydrochloric acid solution or salpeter solution.
Preferably, the mol ratio of the Ag nano wires and ZnSe-Amine organic-inorganic hybrid nanomaterials is 2~3：1.
The invention provides a kind of modified silver nanotube, including Ag and Ag2Se.The invention provides a kind of Ag-Ag2Se is answered
Close nanotube, including Ag nanotubes and the Ag for being compounded in the Ag nanotube surfaces2Se layers.Modified silver provided by the invention is received
Mitron and Ag-Ag2Se composite nano tubes have very wide uv-visible absorption spectra scope, can more utilize the sun
Light, good application potential is had in photocatalysis and opto-electronic conversion.In addition, Ag-Ag provided by the invention2Se composite nano tubes
Phase transition temperature is relatively low, makes its phase change memory application aspect prospect in a mild condition also very wide.Experimental result table
It is bright：Ag-Ag provided by the invention2Range of wavelengths of the Se composite nano tubes from 200nm to 800nm has strong absorption；Heat and move back
Phase transition temperature is respectively near 100 DEG C and 90 DEG C when fiery.
Brief description of the drawings
Fig. 1 is the reaction schematic diagram of preparation method provided in an embodiment of the present invention；
Fig. 2 is the TEM figures of Ag nano wires prepared by the embodiment of the present invention 1；
Fig. 3 is Ag nano wire and Ag-Ag prepared by the embodiment of the present invention 12Ultraviolet-visible ray of Se composite nano tubes
(UV-vis) spectrogram is absorbed；
Fig. 4 is the XRD spectra of Ag nano wires provided in an embodiment of the present invention and 2 differential responses time of embodiment product；
Fig. 5 is [ZnSe] (DETA) prepared by the embodiment of the present invention 10.5The TEM figures of nanometer sheet；
Fig. 6 is Ag-Ag prepared by the embodiment of the present invention 12Se composite nano tubes amplify 50000 times of TEM figures；
Ag-Ag prepared by Fig. 7 embodiment of the present invention 12Se composite nano tubes amplify 100000 times of TEM figures；
Fig. 8 is Ag-Ag prepared by the embodiment of the present invention 12X-ray diffraction (XRD) spectrogram of Se composite nano tubes；
Fig. 9 is that the embodiment of the present invention 2 reacts the TEM figures that the product obtained for 1 day amplifies 100000 times；
Figure 10 is that the embodiment of the present invention 2 reacts 6 days obtained Ag-Ag2Se composite nano tubes amplify 150000 times of TEM
Figure；
Figure 11 is Ag-Ag prepared by the embodiment of the present invention 22Se composite nano tubes amplify 150000 times of TEM figures；
Figure 12 is Ag-Ag prepared by the embodiment of the present invention 22The outer layer of Se composite nano tubes and the HRTEM of internal layer boundary
Figure；
Figure 13 is Ag-Ag prepared by the embodiment of the present invention 22The internal layer of Se composite nano tubes and the HRTEM of hollow boundary
Figure；
Figure 14 is Ag-Ag prepared by the embodiment of the present invention 22The EDS energy spectrum diagrams of Se composite nano tubes；
Figure 15 is Ag-Ag prepared by the embodiment of the present invention 22The ultraviolet-visible light (UV-vis) of Se composite nano tubes absorbs
Spectrogram；
Figure 16 is Ag-Ag prepared by the embodiment of the present invention 22Means of differential scanning calorimetry (DSC) spectrogram of Se composite nano tubes.
Embodiment
The invention provides a kind of modified silver nanotube, including Ag and Ag2Se。
In the present invention, the modified silver nanotube is preferably obtained by following preparation method：
Ag nano wires, acid solution and ZnSe-Amine organic-inorganic hybrid nanomaterials are mixed, reaction, are modified
Silver nanotube, the modified silver nanotube include Ag and Ag2Se。
The present invention does not have special limit to the species of the ZnSe-Amine organic-inorganic hybrid nanomaterials and source
System, using ZnSe-Amine organic-inorganic hybrid nanomaterials well known to those skilled in the art.In the present invention, institute
It is preferably [ZnSe] (DETA) to state ZnSe-Amine organic-inorganic hybrid nanomaterials0.5Nanometer sheet.The present invention is preferably according to text
Offer what (Angewandte Chemie International Edition, 2012, volume 51, page 3211~3215) reported
Synthetic method is prepared [ZnSe] (DETA)0.5Nanometer sheet.In the present invention, described [ZnSe] (DETA)0.5Nanobelt pattern is equal
One, inside has more layer structures, there is good ultraviolet-visible absorption and fluorescence property.
The present invention does not have special limitation to the source of the Ag nano wires, is received using Ag well known to those skilled in the art
Rice noodles, its commercial goods can be such as used, the skill well known to those skilled in the art for preparing Ag nano wires can also be used
Art scheme is voluntarily prepared.The present invention preferably according to document (Advanced Materials, 2011, volume 23,3052~3056
Page) synthetic method reported prepares Ag nano wires.In the present invention, the centre of the Ag nano wires is hollow, two ends sealed.
In the present invention, the diameter of the Ag nano wires is preferably 50nm~60nm.
In the present invention, the acid solution preferably includes hydrochloric acid solution or salpeter solution；The acid solution causes reactant
The pH value of system is 1~2.
In the present invention, the temperature for preparing reaction when being modified silver nanotube is preferably 10~35 DEG C；The time of reaction is excellent
Elect as 1~6 day.
In the present invention, Ag and Se mol ratio is preferably 2 in the modified silver nanotube:1~3:1.
The invention provides a kind of Ag-Ag2Se composite nano tubes, including Ag nanotubes and it is compounded in Ag nanotube surfaces
Ag2Se layers.
Ag-Ag provided by the invention2Se composite nano tubes are Ag@Ag2Se composite nano tubes include Ag nanotubes.In this hair
In bright, the Ag nanotubes are preferably Ag nano wires；The centre of the Ag nano wires is hollow, two ends sealed；The Ag nanometers
The diameter of line is preferably 50nm~60nm.
Ag-Ag provided by the invention2Se composite nano tubes include the Ag for being compounded in the Ag nanotube surfaces2Se layers.
In the present invention, the Ag-Ag2Ag and Se mol ratio is preferably 2 in Se composite nano tubes:1~3:1.
In the present invention, the Ag2Ag in Se layers2Se is β-Ag2Se。
In the present invention, the Ag-Ag2The diameter of Se composite nano tubes is preferably 65~80nm；In the specific of the present invention
In embodiment, the Ag-Ag2The a diameter of 67nm or 70nm of Se composite nano tubes.
Present invention also offers Ag-Ag described in a kind of above-mentioned technical proposal2The preparation method of Se composite nano tubes, including with
Lower step：
Under conditions of stirring, Ag nano wires, ZnSe-Amine organic-inorganic hybrid nanomaterials and acid solution are mixed
Close, reaction, obtain Ag-Ag2Se composite nano tubes.
In the present invention, the Ag nano wires are as template.It is special that the present invention does not have to the source of the Ag nano wires
Limitation, using Ag nano wires well known to those skilled in the art, can such as use its commercial goods, can also use ability
The technical scheme that Ag nano wires are prepared known to field technique personnel is voluntarily prepared.The present invention is preferably according to document (Advanced
Materials, 2011, volume 23, page 3052~3056) synthetic method reported prepares Ag nano wires.
The present invention does not have special limit to the species of the ZnSe-Amine organic-inorganic hybrid nanomaterials and source
System, using ZnSe-Amine organic-inorganic hybrid nanomaterials well known to those skilled in the art.In the present invention, institute
It is preferably [ZnSe] (DETA) to state ZnSe-Amine organic-inorganic hybrid nanomaterials0.5Nanometer sheet；Utilize this hybrid material
As Se sources so that preparation method is simple, is easy to control.The present invention is preferably according to document (Angewandte Chemie
International Edition, 2012, volume 51, page 3211~3215) synthetic method reported prepared [ZnSe]
(DETA)0.5Nanometer sheet.In the present invention, described [ZnSe] (DETA)0.5Molar concentration of the nanometer sheet in reaction system is preferred
For 1.0~2.5mmol/L.
In the present invention, the mol ratio of the Ag nano wires and ZnSe-Amine organic-inorganic hybrid nanomaterials is preferred
For 2~3：1.
In the present invention, the acid solution preferably includes hydrochloric acid solution or salpeter solution；The acid solution causes reactant
The pH value of system is 1~2.The present invention does not have special limitation to the source of the acid solution, using known to those skilled in the art
Acid solution, can such as use its commercial goods.In an embodiment of the present invention, the acid solution can be mass fraction
For 37% hydrochloric acid solution, or mass fraction is 69% salpeter solution.In the present invention, the acid solution can be broken
The stability of bad above-mentioned hybrid material, so as to slowly release Se.The present invention can control Se release by acid solution.
In the present invention, the mode of the stirring is preferably magnetic agitation.The present invention is preferably in the lasting stirring bar of strength
Reacted under part.In the present invention, the speed of the stirring is preferably greater than or equal to 700rpm.Under conditions of strong stirring,
The Se discharged can be diffused into the surface of Ag nano wires, and Ag atoms rapidly active with its surface react generation
Ag2Se；With the extension in reaction time, Ag nanowire surfaces can coat one layer of Ag2Se, form Ag-Ag2Se core-shell structure copolymer composite hollows
Structure.The Ag-Ag2The formation of Se core-shell structure copolymer composite hollow structures can be explained by Kinkendal Effect, be compared to Se
Atom, Ag atoms can to external diffusion and also diffusion velocity it is relatively fast, the Ag atoms that diffuse out and the Se discharged continue
Reaction, and then form Ag-Ag2Se composite nano tubes.
In the present invention, the temperature of the reaction is preferably 10~35 DEG C；The time of the reaction is preferably 1~6 day.
The invention provides a kind of modified silver nanotube, including Ag and Ag2Se.The invention provides a kind of Ag-Ag2Se is answered
Close nanotube, including Ag nanotubes and the Ag for being compounded in the Ag nanotube surfaces2Se layers.Modified silver provided by the invention is received
Mitron and Ag-Ag2Se composite nano tubes have very wide uv-visible absorption spectra scope, it means that such a material can
Sunshine more is utilized, good application potential is had in photocatalysis and opto-electronic conversion.In addition, Ag-Ag provided by the invention2Se
The phase transition temperature of composite nano tube is relatively low, it means that the phase change memory application side of such a material in a mild condition
Face, prospect are also very wide.Test result indicates that：Ag-Ag provided by the invention2Se composite nano tubes are from 200nm to 800nm
Range of wavelengths has strong absorption；Phase transition temperature is respectively near 100 DEG C and 90 DEG C when heating and annealing.
In order to further illustrate the present invention, with reference to embodiment to a kind of modified silver nanotube provided by the invention, Ag-
Ag2Se composite nano tubes and preparation method thereof are described in detail, but they can not be interpreted as to the scope of the present invention
Restriction.
Embodiment 1
The present embodiment prepares Ag-Ag according to the route shown in Fig. 12Se composite nano tubes, Fig. 1 are preparation provided by the invention
The reaction schematic diagram of method：
The present embodiment 1 has been reported according to document (Advanced Materials, 2011, volume 23, page 3052-3056)
Synthetic method prepare Ag nano wires；
JEOL JEM-2011 transmission electron microscopes (TEM), Shimadzu UV-240 ultra-violet absorption spectrums is respectively adopted
Instrument, PW1710X- x ray diffractometer xs (XRD) characterize to gained solid product sample Ag nano wires.
Fig. 2 is the transmission electron microscope TEM figures of Ag nano wires prepared by the embodiment of the present invention 1, as can be seen from Figure 2：
The statistic diameters of Ag nano wires is 55nm；Fig. 3 is Ag nano wire and Ag-Ag2Se composite nano tubes prepared by the embodiment of the present invention 1
Ultraviolet-visible light (UV-vis) absorb spectrogram；Wherein 1 for Ag nano wires ultraviolet-visible light (UV-vis) absorb spectrogram, 2
Spectrogram is absorbed for the ultraviolet-visible light (UV-vis) of Ag-Ag2Se composite nano tubes.
Fig. 4 is the XRD spectra of Ag nano wires provided in an embodiment of the present invention and 2 differential responses time of embodiment product, its
Middle curve 1 is the XRD spectra of Ag nano wires.
The present embodiment 1 according to document (Angewandte Chemie International Edition, 2012,51
Volume, page 3211~3215) synthetic method reported prepared [ZnSe] (DETA)0.5Nanometer sheet.
Using JEOL JEM-2011 transmission electron microscopes (TEM) to gained solid product sample [ZnSe] (DETA)0.5
Nanometer sheet is characterized.Fig. 5 is [ZnSe] (DETA) prepared by the embodiment of the present invention 10.5The TEM figures of nanometer sheet.Can be with from Fig. 5
Find out：Synthesized [ZnSe] (DETA)0.5Nanometer sheet and document report it is consistent.
Release Se sources synthesis Ag-Ag is acidified using hydrochloric acid2Se composite nano tubes：
In 40mL deionized waters, 0.075mmol [ZnSe] (DETA) is added0.5Nanometer sheet, magnetic agitation is uniform, by original
Sub- mol ratio Ag：Se=3:1 ratio adds Ag nano wires 24mg, it is to be mixed uniformly after, add 0.4mL hydrochloric acid, the matter of hydrochloric acid
It is 37% to measure fraction, is reacted 6 days, and this reaction is carried out at normal temperatures, the lasting magnetic force of holding strength (>700rpm) stir, obtain
Ag-Ag2Se composite nano tubes；The centre of the Ag-Ag2Se composite nano tubes is hollow, and internal layer is Ag nanotubes and is compounded in
The outer layer of the internal layer surface is Ag2Se layers.
Be respectively adopted JEOL JEM-2011 transmission electron microscopes (TEM), Shimadzu UV-240 ultra-violet absorption spectrums,
PW1710X- x ray diffractometer xs (XRD) are to gained solid product sample Ag-Ag2Se composite nano tubes are characterized.
Ag-Ag prepared by Fig. 6 embodiment of the present invention 12Se composite nano tubes (containing a small amount of AgCl) amplify 50000 times of TEM
Figure；Ag-Ag prepared by Fig. 7 embodiment of the present invention 12Se composite nano tubes (containing a small amount of AgCl) amplify 100000 times of TEM figures；From
Fig. 6 and Fig. 7 can be seen that：Ag-Ag2The statistic diameters of Se composite nano tubes is 67nm, bigger than original template Ag nanowire diameters
；It can also be seen that be the tubular structure of central hollow, and surface seems more coarse than original template Ag nano wires.
Fig. 8 is Ag-Ag prepared by the embodiment of the present invention 12The XRD spectra of Se (containing a small amount of AgCl) composite nano tube, can be with
See Ag and β-Ag2Se diffraction maximum is simultaneously deposited, wherein the peak for having a little diffraction maximum to be retrieved as AgCl, illustrates the inside containing a small amount of
AgCl impurity.
Fig. 3 is Ag nano wire and Ag-Ag prepared by the embodiment of the present invention 12Ultraviolet-visible ray of Se composite nano tubes is inhaled
Receive spectrogram；From figure 3, it can be seen that Ag-Ag2The UV absorption spectrums of Se composite nano tubes are very wide, the wavelength from 200nm to 800nm
There is strong absorption in section, it means that such a material can more utilize sunshine, be had well in photocatalysis and opto-electronic conversion
Application potential.
Embodiment 2
Sustained release Se sources synthesis Ag-Ag is acidified using nitric acid2Se composite nano tubes：
In 40mL deionized waters, 0.075mmol [ZnSe] (DETA) is added0.5Nanometer sheet, magnetic agitation is uniform, by original
Sub- mol ratio Ag：Se=3:1 ratio adds Ag nano wires 24mg, it is to be mixed uniformly after, add 0.2mL nitric acid, the matter of nitric acid
It is 69% to measure fraction, is reacted 6 days, and this reaction is carried out at normal temperatures, keep strength it is lasting (>Magnetic agitation 700rpm), is obtained
Ag-Ag2Se composite nano tubes；The Ag-Ag2The centre of Se composite nano tubes is hollow, and internal layer is Ag nanotube and is compounded in institute
The outer layer for stating internal layer surface is Ag2Se layers.
JEOL JEM-2011 transmission electron microscopes (TEM, HRTEM, EDS) are respectively adopted in the present invention, PW1710X- is penetrated
Line diffractometer (XRD) is to gained solid product sample Ag-Ag2Se composite nano tubes are characterized.
Fig. 9 is that the embodiment of the present invention 2 reacts the TEM figures that the product obtained for 1 day amplifies 100000 times, as can be seen from Figure 9：
When reaction 1 day, central hollow structure is not yet formed, but it is more thick relative to original template Ag nano wires to can see surface
It is rough, and have many little particle absorption on the surface of nano wire；Figure 10 is that the embodiment of the present invention 2 reacts 6 days obtained Ag-
Ag2Se amplifies 150000 times of TEM figures；As can be seen from Figure 10：When reaction 6 days, it can be seen that obvious hollow tubular
Structure, surface is more coarse, and its statistic diameters is 70nm.
Fig. 4 is the XRD spectra of Ag nano wires provided in an embodiment of the present invention and 2 differential responses time of embodiment product, its
In, curve 2 is the XRD spectra of the product obtained when reacting 1 day, and curve 3 is the XRD spectra of the product obtained when reacting 6 days；From
In Fig. 4 as can be seen that with the increase in reaction time, Ag diffraction maximums weaken relative, β-Ag2Se diffraction maximums are in relative enhancing.
Figure 11 is Ag-Ag prepared by the embodiment of the present invention 22Se composite nano tubes amplify 150000 times of TEM figures, from figure
11 can be seen that：In the outermost of nanotube, Ag lattice fringe only have seen；Figure 12 is Ag- prepared by the embodiment of the present invention 2
Ag2The outer layer of Se composite nano tubes is schemed with the HRTEM of internal layer boundary；Figure 13 is Ag-Ag prepared by the embodiment of the present invention 22Se
The internal layer of composite nano tube and the HRTEM of hollow boundary figures, can be seen that from Figure 12 and Figure 13：In the centre of nanotube, both
The lattice fringe for having Ag also has Ag2Se lattice fringe, and the striped of big spacing can also be seen, this is multiple lattice fringe
Interlaced result.
Figure 14 is Ag-Ag prepared by the embodiment of the present invention 22The EDS energy spectrum diagrams of Se composite nano tubes, it is as a result atomic ratio
Ag：Se=27:12, this explanation Ag：Ag2Se≈1:1。
Figure 15 is Ag-Ag prepared by the embodiment of the present invention 22The ultraviolet-visible light (UV-vis) of Se composite nano tubes absorbs
Spectrogram；It can be seen from fig. 15 that Ag-Ag2The UV absorption spectrums of Se composite nano tubes are very wide, the wavelength zone from 200nm to 800nm
Between have strong absorption, it means that such a material can more utilize sunshine, be had in photocatalysis and opto-electronic conversion good
Application potential
Product Ag-Ag of the present invention to reaction 6 days2Se composite nano tubes have done means of differential scanning calorimetry (DSC Q2000) survey
Try, under nitrogen atmosphere, 5 DEG C/min of heating rate, circulated 3 times between 20 DEG C~200 DEG C.DSC results are as shown in figure 16, figure
16 be Ag-Ag prepared by the embodiment of the present invention 22Means of differential scanning calorimetry (DSC) spectrogram of Se composite nano tubes, can from Figure 16
Go out：After stable, Ag-Ag when heating and annealing2The phase transition temperature of Se composite nano tubes is respectively near 100 DEG C and 90 DEG C, than text
Offer phase transition temperature that (Chemistry of Materials, 2014, volume 26, page 5647~5653) reported (140 DEG C and
110 DEG C) it is much lower, it means that and the phase change memory application aspect of such a material in a mild condition, prospect are also very wide.
As seen from the above embodiment, the invention provides a kind of modified silver nanotube, including Ag and Ag2Se.The present invention carries
A kind of Ag-Ag is supplied2Se composite nano tubes, including Ag nanotubes and the Ag for being compounded in the Ag nanotube surfaces2Se layers.This hair
The modification silver nanotube and Ag-Ag of bright offer2Se composite nano tubes have very wide uv-visible absorption spectra scope, this meaning
Taste, which such a material, can more utilize sunshine, and good application potential is had in photocatalysis and opto-electronic conversion.In addition, this hair
The Ag-Ag of bright offer2The phase transition temperature of Se composite nano tubes is relatively low, it means that such a material is in a mild condition
Phase change memory application aspect, prospect are also very wide.Test result indicates that：Ag-Ag provided by the invention2Se composite nano tubes from
200nm to 800nm range of wavelengths has strong absorption；Phase transition temperature is respectively near 100 DEG C and 90 DEG C when heating and annealing.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (4)
- A kind of 1. Ag-Ag2The preparation method of Se composite nano tubes, comprises the following steps：Under conditions of stirring, the speed of the stirring is more than or equal to 700rpm, by Ag nano wires, ZnSe-Amine it is organic-nothing Machine hybrid nano-material and acid solution mixing, reaction, the acid solution make it that the pH value of reaction system is 1~2, the reaction Temperature is 10~35 DEG C, and the time of the reaction is 1~6 day, obtains Ag-Ag2Se composite nano tubes；The Ag nano wires and The mol ratio of ZnSe-Amine organic-inorganic hybrid nanomaterials is 2~3：1；The Ag-Ag2Se composite nano tubes include Ag nanotubes and are compounded in the Ag of Ag nanotube surfaces2Se layers.
- 2. preparation method according to claim 1, it is characterised in that the Ag-Ag2Ag and Se in Se composite nano tubes Mol ratio is 2:1~3:1.
- 3. preparation method according to claim 1, it is characterised in that the ZnSe-Amine inorganic-organic hybridization nanos Material is [ZnSe] (DETA)0.5Nanometer sheet.
- 4. preparation method according to claim 1, it is characterised in that the acid solution includes hydrochloric acid solution or nitric acid is molten Liquid.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102125056A (en) * | 2011-01-10 | 2011-07-20 | 中国科学技术大学 | Method for preparing silver/graphene antimicrobial composite material |
| CN102874749A (en) * | 2012-09-12 | 2013-01-16 | 中国科学技术大学 | Method for manufacturing nano pipes |
| CN104445102A (en) * | 2014-11-27 | 2015-03-25 | 中国科学技术大学 | Method for synthesizing ultrathin Se nanosheet through acidification, stripping and oxidization of precursors and application of ultrathin Se nanosheet |
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