CN103342980A - Preparation method for MWCNT/Fe3O4/PANI/Au multilayer wrapped nanotube - Google Patents

Preparation method for MWCNT/Fe3O4/PANI/Au multilayer wrapped nanotube Download PDF

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CN103342980A
CN103342980A CN2013102601573A CN201310260157A CN103342980A CN 103342980 A CN103342980 A CN 103342980A CN 2013102601573 A CN2013102601573 A CN 2013102601573A CN 201310260157 A CN201310260157 A CN 201310260157A CN 103342980 A CN103342980 A CN 103342980A
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pani
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CN103342980B (en
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王志江
刘晨宇
徐用军
姜兆华
王福平
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Inner Mongolia Yuanqi New Material Technology Co., Ltd.
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Harbin Institute of Technology
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Abstract

A preparation method for an MWCNT/Fe3O4/PANI/Au multilayer wrapped nanotube, relates to the preparation method for the multilayer wrapped nanotube and aims to solve the problems that a current carbon nanotube of a binary or ternary material system, taking the MWCNT as a main body for wrapping, is poor in microwave absorption ability and bonding force between layers. The method comprises the following steps of: 1, performing ultrasonic dispersion; 2, preparing MWCNT/Fe3O4 composite powder; 3, preparing MWCNT/Fe3O4/PANI material; 4, performing Au in-situ outer layer sediment; 5, preparing the MWCNT/Fe3O4/PANI/Au multilayer wrapped nanotube through magnetic separation. The preparation method is mainly used for preparing the MWCNT/Fe3O4/PANI/Au multilayer wrapped nanotube.

Description

A kind of MWCNT/Fe 3O 4The preparation method of/PANI/Au multilayer parcel nanotube
Technical field
The present invention relates to a kind of preparation method of multilayer parcel nanotube.
Background technology
Carbon nanotube is a kind of open column shape carbon nanomaterial that is curled and formed by the single or multiple lift graphite flake layer, and its good physico-chemical property causes people's attention day by day, all has great application potential at a plurality of sciemtifec and technical spheres.Multi-walled carbon nano-tubes (MWCNT) can be regarded as by a plurality of Single Walled Carbon Nanotube nested, concentric and forms, distance between the tube wall is 0.34nm~0.40nm, because special structure and dielectricity, have simultaneously that quality is light, electroconductibility is adjustable, high-temperature oxidation resistance is strong and characteristics such as good stability, obtained in a lot of fields using well.Existing is that main body is wrapped up and is prepared into binary or ternary material system carbon nanotube with MWCNT, but existing is that main body is wrapped up and is prepared into the problem that there are the microwave absorption capacity difference in binary or ternary material system carbon nanotube, the application of restriction binary or ternary material system carbon nanotube with MWCNT.
Summary of the invention
The objective of the invention is to solve existing is that main body is wrapped up and is prepared into binary or there is the problem of microwave absorption capacity difference and each interlayer bonding force difference in ternary material system carbon nanotube with MWCNT, and a kind of MWCNT/Fe is provided 3O 4The preparation method of/PANI/Au multilayer parcel nanotube.
A kind of MWCNT/Fe 3O 4The preparation method of/PANI/Au multilayer parcel nanotube specifically prepares according to the following steps:
One, ultra-sonic dispersion: at first multi-walled carbon nano-tubes, ferric acetyl acetonade are added in the triglycol, carry out ultra-sonic dispersion then, obtain dispersion liquid; The mass ratio of the multi-walled carbon nano-tubes described in the step 1 and ferric acetyl acetonade is 1:(2~8); The quality of the multi-walled carbon nano-tubes described in the step 1 and the volume ratio of triglycol are 1mg:(0.1mL~1mL);
Two, preparation MWCNT/Fe 3O 4Composite granule: the dispersion liquid that under nitrogen protection step 1 is obtained heats; be that 1 ℃/min~10 ℃/min is heated to boiling with temperature rise rate; utilize magnetism separate method to separate then; separating the solid that obtains washes 2~3 times earlier; ethanol is washed 2~3 times again; be 30 ℃~40 ℃ dry 8h~15h in temperature at last, obtain MWCNT/Fe 3O 4Composite granule;
Three, preparation MWCNT/Fe 3O 4/ PANI material: the MWCNT/Fe that elder generation obtains step 2 3O 4The composite granule ultra-sonic dispersion is in water, under agitation condition, add aniline then, be that 0.05mL/s~0.5mL/s adding concentration is the ammonium persulfate aqueous solution of 0.001g/mL~0.02g/mL with the rate of addition, utilizing concentration for the ammonium persulfate aqueous solution of 0.001g/mL~0.02g/mL the pH value of reaction system to be controlled between 5~6; Be 0~25 ℃ of constant temperature machinery stirring reaction 2h~10h in temperature then, isothermal reaction utilizes magnetism separate method to separate after finishing, and separates the solid that obtains and washes 2~3 times earlier, and ethanol is washed 2~3 times again, be 30 ℃~40 ℃ dry 8h~15h in temperature at last, obtain MWCNT/Fe 3O 4/ PANI material; MWCNT/Fe described in the step 3 3O 4The quality of composite granule and the volume ratio of water are 1mg:(0.1mL~2mL); MWCNT/Fe described in the step 3 3O 4The quality of composite granule and the volume ratio of aniline are 1mg:(0.0001mL~0.001mL);
Four, the outer deposition of Au original position: the MWCNT/Fe that elder generation obtains step 3 3O 4/ PANI material ultra-sonic dispersion is in water, under agitation condition, add polyvinylpyrrolidone then, and mechanical stirring 20min~40min, be that 0.05mL/s~0.5mL/s at the uniform velocity adds the aqueous solution of chloraurate that concentration is 0.25mg/mL~4mg/mL then with the rate of addition, add aniline again, mechanical stirring 8min~12min is 0~25 ℃ of constant temperature mechanical stirring 1h~6h in temperature at last then, obtains reaction product; MWCNT/Fe described in the step 4 3O 4The mass ratio of/PANI material and polyvinylpyrrolidone is 1:(1~20); MWCNT/Fe described in the step 4 3O 4The quality of/PANI material and concentration are that the mass ratio of hydrochloro-auric acid is 1:(0.1~2 in the aqueous solution of chloraurate of 0.25mg/mL~4mg/mL); MWCNT/Fe described in the step 4 3O 4The quality of/PANI material and the volume ratio of aniline are 1mg:(0.005mL~0.05mL);
Five, magnetic separates: utilize magnetism separate method that the reaction product that step 4 obtains is separated, separate the solid that obtains and wash 2~3 times earlier, ethanol is washed 2~3 times again, is 30 ℃~40 ℃ dry 8h~15h in temperature at last, obtains MWCNT/Fe 3O 4/ PANI/Au multilayer parcel nanotube.
Advantage of the present invention: the MWCNT/Fe of the present invention's preparation 3O 4/ PANI/Au multilayer parcel nanotube is the quaternary composite nano materials, and innermost layer is the multi-walled carbon nano-tubes with excellent mechanical performances, and the second layer is Fe 3O 4Magneticsubstance strengthens the interfacial polarization effect, and inferior outer field PANI is conductive polymers, improves bonding force between powder and binding agent simultaneously, and the outermost layer golden nanometer particle has third-order non-linear and plasma effect, and four kinds of materials play a role separately and intercouple; The MWCNT/Fe of the present invention's preparation 3O 4/ PANI/Au multilayer parcel nanotube absorbs about 100% hertzian wave in the minimal reflection loss of 9GHz place for-60dB(), so the MWCNT/Fe that the present invention prepares 3O 4/ PANI/Au multilayer parcel nanotube can be used for inhaling ripple, catalysis, bio-sensing, opto-electronic device and field of semiconductor materials.
Description of drawings
Fig. 1 is the MWCNT/Fe of test one preparation 3O 4The TEM figure of/PANI/Au multilayer parcel nanotube;
Fig. 2 is the MWCNT/Fe of test one preparation 3O 4The HRTEM photo of/PANI/Au multilayer parcel nanotube;
Fig. 3 is the MWCNT/Fe of test one preparation 3O 4/ PANI/Au multilayer parcel nanotube XRD figure,, among the figure ◆ expression Fe 3O 4Characteristic peak, represents the characteristic peak of MWCNT among the figure, ★ represents the characteristic peak of PANI among the figure, ▽ represents the characteristic peak of Au among the figure;
Fig. 4 is the MWCNT/Fe of test one preparation 3O 4/ PANI/Au multilayer parcel nanotube 2~18GHz microwave absorbing figure.
Embodiment
Embodiment one: present embodiment is a kind of MWCNT/Fe 3O 4The preparation method of/PANI/Au multilayer parcel nanotube specifically prepares according to the following steps:
One, ultra-sonic dispersion: at first multi-walled carbon nano-tubes, ferric acetyl acetonade are added in the triglycol, carry out ultra-sonic dispersion then, obtain dispersion liquid; The mass ratio of the multi-walled carbon nano-tubes described in the step 1 and ferric acetyl acetonade is 1:(2~8); The quality of the multi-walled carbon nano-tubes described in the step 1 and the volume ratio of triglycol are 1mg:(0.1mL~1mL);
Two, preparation MWCNT/Fe 3O 4Composite granule: the dispersion liquid that under nitrogen protection step 1 is obtained heats; be that 1 ℃/min~10 ℃/min is heated to boiling with temperature rise rate; utilize magnetism separate method to separate then; separating the solid that obtains washes 2~3 times earlier; ethanol is washed 2~3 times again; be 30 ℃~40 ℃ dry 8h~15h in temperature at last, obtain MWCNT/Fe 3O 4Composite granule;
Three, preparation MWCNT/Fe 3O 4/ PANI material: the MWCNT/Fe that elder generation obtains step 2 3O 4The composite granule ultra-sonic dispersion is in water, under agitation condition, add aniline then, be that 0.05mL/s~0.5mL/s adding concentration is the ammonium persulfate aqueous solution of 0.001g/mL~0.02g/mL with the rate of addition, utilizing concentration for the ammonium persulfate aqueous solution of 0.001g/mL~0.02g/mL the pH value of reaction system to be controlled between 5~6; Be 0~25 ℃ of constant temperature machinery stirring reaction 2h~10h in temperature then, isothermal reaction utilizes magnetism separate method to separate after finishing, and separates the solid that obtains and washes 2~3 times earlier, and ethanol is washed 2~3 times again, be 30 ℃~40 ℃ dry 8h~15h in temperature at last, obtain MWCNT/Fe 3O 4/ PANI material; MWCNT/Fe described in the step 3 3O 4The quality of composite granule and the volume ratio of water are 1mg:(0.1mL~2mL); MWCNT/Fe described in the step 3 3O 4The quality of composite granule and the volume ratio of aniline are 1mg:(0.0001mL~0.001mL);
Four, the outer deposition of Au original position: the MWCNT/Fe that elder generation obtains step 3 3O 4/ PANI material ultra-sonic dispersion is in water, under agitation condition, add polyvinylpyrrolidone then, and mechanical stirring 20min~40min, be that 0.05mL/s~0.5mL/s at the uniform velocity adds the aqueous solution of chloraurate that concentration is 0.25mg/mL~4mg/mL then with the rate of addition, add aniline again, mechanical stirring 8min~12min is 0~25 ℃ of constant temperature mechanical stirring 1h~6h in temperature at last then, obtains reaction product; MWCNT/Fe described in the step 4 3O 4The mass ratio of/PANI material and polyvinylpyrrolidone is 1:(1~20); MWCNT/Fe described in the step 4 3O 4The quality of/PANI material and concentration are that the mass ratio of hydrochloro-auric acid is 1:(0.1~2 in the aqueous solution of chloraurate of 0.25mg/mL~4mg/mL); MWCNT/Fe described in the step 4 3O 4The quality of/PANI material and the volume ratio of aniline are 1mg:(0.005mL~0.05mL);
Five, magnetic separates: utilize magnetism separate method that the reaction product that step 4 obtains is separated, separate the solid that obtains and wash 2~3 times earlier, ethanol is washed 2~3 times again, is 30 ℃~40 ℃ dry 8h~15h in temperature at last, obtains MWCNT/Fe 3O 4/ PANI/Au multilayer parcel nanotube.
Golden nanometer particle has unique optics, electricity and catalysis characteristics, has wide application at numerous areas such as sensor, photoelectric device and catalysis, golden nanometer particle also can be used as absorbing material and is applied to stealthy military field with its excellent third-order non-linear and plasma effect.
Polyaniline more and more receives the concern of scientists as a kind of novel functional high molecule material.This is not only because it has advantages such as synthetic method is simple, mechanism of doping effect is unique, environmental stability is good, and it also has wide development and application prospect.At first it is a kind of high conductive material, and its density and organic polymer are suitable, has the potential intermiscibility of certain workability and other commodity polymer insulating material, thereby might prepare the conducting polymer composite of low conductivity threshold.Organic conjugate polymer has unique light, electricity, magnetic property in very wide range of frequency, make it have potential using value in a lot of occasions,
Fe 3O 4Magnetic nano-particle is as a kind of special nano material, basic material and aspects such as magnetic paint, medicine at magnetic recording material, special catalyst raw material, magnetic fluid demonstrate many specific functions, and the preparation method of relevant nano-magnetic Z 250 and the research of character also are subjected to extensive concern.
The MWCNT/Fe of present embodiment preparation 3O 4/ PANI/Au multilayer parcel nanotube is the quaternary composite nano materials, and innermost layer is the multi-walled carbon nano-tubes with excellent mechanical performances, and the second layer is Fe 3O 4Magneticsubstance strengthens the interfacial polarization effect, and inferior outer field PANI is conductive polymers, improves bonding force between powder and binding agent simultaneously, and the outermost layer golden nanometer particle has third-order non-linear and plasma effect, and four kinds of materials play a role separately and intercouple; The MWCNT/Fe of present embodiment preparation 3O 4/ PANI/Au multilayer parcel nanotube absorbs about 100% hertzian wave in the minimal reflection loss of 9GHz place for-60dB(), so the MWCNT/Fe that present embodiment prepares 3O 4/ PANI/Au multilayer parcel nanotube can be used for inhaling ripple, catalysis, bio-sensing, opto-electronic device and field of semiconductor materials.
Embodiment two: the difference of present embodiment and embodiment one is: the mass ratio of multi-walled carbon nano-tubes and ferric acetyl acetonade is 1:(3~5 in the step 1).Other are identical with embodiment one.
Embodiment three: present embodiment and one of embodiment one or two difference are: the quality of the multi-walled carbon nano-tubes described in the step 1 and the volume ratio of triglycol are 1mg:(0.2mL~1mL).Other are identical with embodiment one or two.
Embodiment four: one of present embodiment and embodiment one to three difference is: the MWCNT/Fe described in the step 3 3O 4The quality of composite granule and the volume ratio of water are 1mg:(0.2mL~0.7mL).Other are identical with embodiment one to three.
Embodiment five: one of present embodiment and embodiment one to four difference is: the MWCNT/Fe described in the step 3 3O 4The quality of composite granule and the volume ratio of aniline are 1mg:(0.0005mL~0.001mL).Other are identical with embodiment one to four.
Embodiment six: one of present embodiment and embodiment one to five difference is: the MWCNT/Fe described in the step 4 3O 4The mass ratio of/PANI material and polyvinylpyrrolidone is 1:(5~10).Other are identical with embodiment one to five.
Embodiment seven: one of present embodiment and embodiment one to six difference is: the MWCNT/Fe described in the step 4 3O 4The quality of/PANI material and concentration are that the mass ratio of hydrochloro-auric acid is 1:(0.5~1.5 in the aqueous solution of chloraurate of 0.25mg/mL~4mg/mL).Other are identical with embodiment one to six.
Embodiment eight: one of present embodiment and embodiment one to seven difference is: the MWCNT/Fe described in the step 4 3O 4The quality of/PANI material and the volume ratio of aniline are 1mg:(0.01mL~0.02mL).Other are identical with embodiment one to seven.
Adopt following verification experimental verification effect of the present invention:
Test one: a kind of MWCNT/Fe 3O 4The preparation method of/PANI/Au multilayer parcel nanotube specifically prepares according to the following steps:
One, ultra-sonic dispersion: at first the multi-walled carbon nano-tubes of 100mg, the ferric acetyl acetonade of 400mg are added in the triglycol of 25mL, carry out ultra-sonic dispersion then, obtain dispersion liquid;
Two, preparation MWCNT/Fe 3O 4Composite granule: the dispersion liquid that under nitrogen protection step 1 is obtained heats; be that 4 ℃/min is heated to boiling with temperature rise rate; utilize magnetism separate method to separate then; separating the solid that obtains washes 2 times earlier; ethanol is washed 2 times again; be 40 ℃ of dry 12h in temperature at last, obtain MWCNT/Fe 3O 4Composite granule;
Three, preparation MWCNT/Fe 3O 4/ PANI material: elder generation is with the MWCNT/Fe of 50mg 3O 4The composite granule ultra-sonic dispersion is in 25mL water, under agitation condition, add 0.04mL aniline then, be that 0.1mL/s adding concentration is the ammonium persulfate aqueous solution of 0.018g/mL with the rate of addition, utilizing concentration for the ammonium persulfate aqueous solution of 0.018g/mL the pH value of reaction system to be controlled between 5~6; Be 4 ℃ of constant temperature machinery stirring reaction 6h in temperature then, isothermal reaction utilizes magnetism separate method to separate after finishing, and separates the solid that obtains and washes 2 times earlier, and ethanol is washed 2 times again, is 40 ℃ of dry 12h in temperature at last, obtains MWCNT/Fe 3O 4/ PANI material;
Four, the outer deposition of Au original position: elder generation is with the MWCNT/Fe of 0.5mg 3O 4/ PANI material ultra-sonic dispersion is in 10mL water, the polyvinylpyrrolidone that under agitation condition, adds 40mg then, and mechanical stirring 30min, be that 0.05mL/s at the uniform velocity adds the aqueous solution of chloraurate that 5mL concentration is 1mg/mL then with the rate of addition, add 0.04mL aniline again, mechanical stirring 10min is 25 ℃ of constant temperature mechanical stirring 6h in temperature at last then, obtains reaction product;
Five, magnetic separates: utilize magnetism separate method that the reaction product that step 4 obtains is separated, separate the solid that obtains and wash 2 times earlier, ethanol is washed 2 times again, is 40 ℃ of dry 12h in temperature at last, obtains MWCNT/Fe 3O 4/ PANI/Au multilayer parcel nanotube.
Fig. 1 is the MWCNT/Fe of test one preparation 3O 4The TEM figure of/PANI/Au multilayer parcel nanotube can see Fe by Fig. 1 3O 4, PANI, Au can be coated on the MWCNT surface uniformly, covered effect is good, no particle obscission.
Fig. 2 is the MWCNT/Fe of test one preparation 3O 4The HRTEM photo of/PANI/Au multilayer parcel nanotube can be clearly seen that MWCNT/Fe by Fig. 2 3O 4The lattice of material in four in the/PANI/PVP/Au multilayered structure proves the MWCNT/Fe of preparation 3O 4/ PANI/PVP/Au mixture is four-layer structure.
Fig. 3 is the MWCNT/Fe of test one preparation 3O 4/ PANI/Au multilayer parcel nanotube XRD figure is among the figure ◆ expression Fe 3O 4Characteristic peak, represents the characteristic peak of MWCNT among the figure, ★ represents the characteristic peak of PANI among the figure, ▽ represents the characteristic peak of Au among the figure, can see MWCNT, Fe by Fig. 3 3O 4, PANI, four kinds of materials of Au characteristic peak, illustrate and synthesized MWCNT/Fe 3O 4/ PANI/Au tetraplex.
MWCNT/Fe to this test preparation 3O 4/ PANI/Au multilayer parcel nanotube carries out Performance Detection, and Fig. 4 is the MWCNT/Fe of this test preparation 3O 4/ PANI/Au multilayer parcel nanotube 2~18GHz microwave absorbing figure, the MWCNT/Fe of this test preparation as shown in Figure 4 3O 4/ PANI/Au multilayer parcel nanotube in the minimal reflection loss of 9GHz place is-60dB(absorbs about 100% hertzian wave).

Claims (8)

1. MWCNT/Fe 3O 4The preparation method of/PANI/Au multilayer parcel nanotube is characterized in that MWCNT/Fe 3O 4The preparation method of/PANI/Au multilayer parcel nanotube prepares according to the following steps:
One, ultra-sonic dispersion: at first multi-walled carbon nano-tubes, ferric acetyl acetonade are added in the triglycol, carry out ultra-sonic dispersion then, obtain dispersion liquid; The mass ratio of the multi-walled carbon nano-tubes described in the step 1 and ferric acetyl acetonade is 1:(2~8); The quality of the multi-walled carbon nano-tubes described in the step 1 and the volume ratio of triglycol are 1mg:(0.1mL~1mL);
Two, preparation MWCNT/Fe 3O 4Composite granule: the dispersion liquid that under nitrogen protection step 1 is obtained heats; be that 1 ℃/min~10 ℃/min is heated to boiling with temperature rise rate; utilize magnetism separate method to separate then; separating the solid that obtains washes 2~3 times earlier; ethanol is washed 2~3 times again; be 30 ℃~40 ℃ dry 8h~15h in temperature at last, obtain MWCNT/Fe 3O 4Composite granule;
Three, preparation MWCNT/Fe 3O 4/ PANI material: the MWCNT/Fe that elder generation obtains step 2 3O 4The composite granule ultra-sonic dispersion is in water, under agitation condition, add aniline then, be that 0.05mL/s~0.5mL/s adding concentration is the ammonium persulfate aqueous solution of 0.001g/mL~0.02g/mL with the rate of addition, utilizing concentration for the ammonium persulfate aqueous solution of 0.001g/mL~0.02g/mL the pH value of reaction system to be controlled between 5~6; Be 0~25 ℃ of constant temperature machinery stirring reaction 2h~10h in temperature then, isothermal reaction utilizes magnetism separate method to separate after finishing, and separates the solid that obtains and washes 2~3 times earlier, and ethanol is washed 2~3 times again, be 30 ℃~40 ℃ dry 8h~15h in temperature at last, obtain MWCNT/Fe 3O 4/ PANI material; MWCNT/Fe described in the step 3 3O 4The quality of composite granule and the volume ratio of water are 1mg:(0.1mL~2mL); MWCNT/Fe described in the step 3 3O 4The quality of composite granule and the volume ratio of aniline are 1mg:(0.0001mL~0.001mL);
Four, the outer deposition of Au original position: the MWCNT/Fe that elder generation obtains step 3 3O 4/ PANI material ultra-sonic dispersion is in water, under agitation condition, add polyvinylpyrrolidone then, and mechanical stirring 20min~40min, be that 0.05mL/s~0.5mL/s at the uniform velocity adds the aqueous solution of chloraurate that concentration is 0.25mg/mL~4mg/mL then with the rate of addition, add aniline again, mechanical stirring 8min~12min is 0~25 ℃ of constant temperature mechanical stirring 1h~6h in temperature at last then, obtains reaction product; MWCNT/Fe described in the step 4 3O 4The mass ratio of/PANI material and polyvinylpyrrolidone is 1:(1~20); MWCNT/Fe described in the step 4 3O 4The quality of/PANI material and concentration are that the mass ratio of hydrochloro-auric acid is 1:(0.1~2 in the aqueous solution of chloraurate of 0.25mg/mL~4mg/mL); MWCNT/Fe described in the step 4 3O 4The quality of/PANI material and the volume ratio of aniline are 1mg:(0.005mL~0.05mL);
Five, magnetic separates: utilize magnetism separate method that the reaction product that step 4 obtains is separated, separate the solid that obtains and wash 2~3 times earlier, ethanol is washed 2~3 times again, is 30 ℃~40 ℃ dry 8h~15h in temperature at last, obtains MWCNT/Fe 3O 4/ PANI/Au multilayer parcel nanotube.
2. a kind of MWCNT/Fe according to claim 1 3O 4The preparation method of/PANI/Au multilayer parcel nanotube is characterized in that the mass ratio of multi-walled carbon nano-tubes and ferric acetyl acetonade is 1:(3~5 in the step 1).
3. a kind of MWCNT/Fe according to claim 1 and 2 3O 4The preparation method of/PANI/Au multilayer parcel nanotube, the volume ratio that it is characterized in that the quality of the multi-walled carbon nano-tubes described in the step 1 and triglycol are 1mg:(0.2mL~1mL).
4. a kind of MWCNT/Fe according to claim 1 3O 4The preparation method of/PANI/Au multilayer parcel nanotube is characterized in that the MWCNT/Fe described in the step 3 3O 4The quality of composite granule and the volume ratio of water are 1mg:(0.2mL~0.7mL).
5. according to claim 1 or 4 described a kind of MWCNT/Fe 3O 4The preparation method of/PANI/Au multilayer parcel nanotube is characterized in that the MWCNT/Fe described in the step 3 3O 4The quality of composite granule and the volume ratio of aniline are 1mg:(0.0005mL~0.001mL).
6. a kind of MWCNT/Fe according to claim 1 3O 4The preparation method of/PANI/Au multilayer parcel nanotube is characterized in that the MWCNT/Fe described in the step 4 3O 4The mass ratio of/PANI material and polyvinylpyrrolidone is 1:(5~10).
7. a kind of MWCNT/Fe according to claim 6 3O 4The preparation method of/PANI/Au multilayer parcel nanotube is characterized in that the MWCNT/Fe described in the step 4 3O 4The quality of/PANI material and concentration are that the mass ratio of hydrochloro-auric acid is 1:(0.5~1.5 in the aqueous solution of chloraurate of 0.25mg/mL~4mg/mL).
8. according to claim 1,6 or 7 described a kind of MWCNT/Fe 3O 4The preparation method of/PANI/Au multilayer parcel nanotube is characterized in that the MWCNT/Fe described in the step 4 3O 4The quality of/PANI material and the volume ratio of aniline are 1mg:(0.01mL~0.02mL).
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