CN107286907A - The molybdenum disulfide of a kind of core shell structure/carbonyl iron composite microwave absorbent and preparation method thereof - Google Patents
The molybdenum disulfide of a kind of core shell structure/carbonyl iron composite microwave absorbent and preparation method thereof Download PDFInfo
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Abstract
The invention discloses the molybdenum disulfide of a kind of core shell structure/carbonyl iron composite microwave absorbent and preparation method thereof.The composite microwave absorbent is mainly made up of molybdenum disulfide nano powder and carbonyl iron, using carbonyl iron as core, and molybdenum disulfide nano powder, which is uniformly wrapped in outside carbonyl iron, forms core shell structure.Preparation method includes（1）Carbonyl iron powder and micron is mixed with water, successively molybdenum source is added and sulphur source fully dissolves, adjusts pH value to neutrality, in carrying out hydro-thermal reaction under air-proof condition, obtains hydrothermal product；（2）Hydrothermal product is centrifuged at a high speed, gained precipitation is scrubbed and dries, and obtains molybdenum disulfide/carbonyl iron composite microwave absorbent of core shell structure.The composite microwave absorbent of the present invention can effectively improve maximum reflection loss value, and can substantially reduce matching thickness, be a kind of preferable high performance microwave absorbent.
Description
Technical field
The invention belongs to microwave absorption and technical field of electromagnetic shielding, and in particular to a kind of two sulphur of core shell structure
Change molybdenum/carbonyl iron composite microwave absorbent and preparation method thereof.
Background technology
Research and develop the key subjects that high performance microwave absorbing material is dual-use technology field.Curing
Molybdenum is a kind of more, the more important novel layered nano material of Recent study, it energy storage, catalysis, lubrication, semiconductor,
The various fields extensive application such as composite.And material also has unique advantage in terms of specific surface area and electrical property, makes
It possesses the potentiality applied to radar-wave absorbing field.M. Q. Ning in 2015 etc. have investigated the MoS of ultrasonic stripping first2Nanometer
The electromagnetic parameter of piece, and with block MoS2Contrasted, found：MoS2The dielectric constant of nanometer sheet is MoS2The two of block materials
Times.In coaxial rings sample absorbent contents be 60wt%, fitting thickness be 2.4mm when, nanometer sheet maximum reflection loss for-
38.42dB, is 4 times of block materials.The effective bandwidth of nanometer sheet（Reflection loss value ＜ -10dB）For 4.1GHz（9.6~
13.76GHz）, it is suitable with the absorbing property of c-based nanomaterial.Think by the introduced defect dipole in Mo and S room
The high-specific surface area of polarization and nanometer sheet is to cause the main cause of its high electromagnetic consumable.Subsequent X. H. Liang etc. are first
Investigate hydro-thermal method and prepare two dimension MoS2The Microwave Absorption Properties of nanometer sheet, when it is 2.2mm to be fitted thickness：Maximum reflection is lost
For -47.8dB, correspondence 12.8GHz, effective bandwidth 4.5GHz（11~15.5GHz）.Except 2~18GHz, MoS2To 18~
40GHz electromagnetic wave also has good absorbent properties.Last year, the MoS that begins one's study such as X. Ding2The suction ripple of based composites
Performance, the RGO/MoS of preparation23D composite constructions, when absorbent contents are 30wt%, and matching thickness is 2.5mm, effective bandwidth
For 5.92GHz, maximum reflection loss is -31dB.Author is also contrasted the work of oneself with other people in text, is as a result shown
RGO-MoS2Potential application of the composite in lightweight absorbing material field.But because RGO and MoS2All it is that dielectric loss type microwave is inhaled
Agent is received, the improvement of impedance matching effect is limited.Ultrasound is peeled off obtained MoS by the applicant's early stage2Nanometer sheet and micron order
Carbonyl iron directly mix, as a result compared with two kinds of components before compound, not only the increase of maximum reflection loss value, effective bandwidth become
Width, and matching thickness significantly reduces.The raising of performance is inseparable with the improvement of compound rear impedance matching.This composite absorption
Agent not only excellent performance, and preparation technology is simple and convenient, but ultrasound is peeled off and obtains MoS2Pattern is relatively simple, predominantly piece
Stratiform, and the uniform mixing to the uniform parcel of carbonyl iron and two kinds of absorbents can not be realized.This will limit composite absorption
The maximum performance of agent absorbing property.
The content of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art there is provided one kind using carbonyl iron as template,
Enable molybdenum disulfide nano powder in its superficial growth precipitation, the matching thickness of absorbent can be greatly reduced, improves maximum anti-
Penetrate molybdenum disulfide/carbonyl iron composite microwave absorbent of the core shell structure of loss value and preparation method thereof.
In order to solve the above technical problems, the present invention uses following technical scheme：
A kind of molybdenum disulfide of core shell structure/carbonyl iron composite microwave absorbent, the composite microwave absorbent is main by two sulphur
Change molybdenum nano-powder to constitute with carbonyl iron, using carbonyl iron as core, molybdenum disulfide nano powder is uniformly wrapped in outside carbonyl iron and formed
Core shell structure.
In the molybdenum disulfide of above-mentioned core shell structure/carbonyl iron composite microwave absorbent, it is preferred that the composite microwave is inhaled
The matching thickness for receiving agent is 1.7mm~3.3mm, and maximum reflection loss value is -65dB~-35dB, and reflection loss value is less than -10dB
Effective loss with a width of 2.2GHz~5.0GHz.
As a total technical concept, the molybdenum disulfide/carbonyl iron of the invention for also providing a kind of core shell structure is combined micro-
The preparation method of wave absorbent, comprises the following steps：
（1）Carbonyl iron powder and micron is mixed with water, successively molybdenum source is added and sulphur source fully dissolves, the pH value of gained mixed liquor is adjusted
Section carries out hydro-thermal reaction to neutrality under air-proof condition, and reaction temperature is 160 DEG C~240 DEG C, the reaction time be 18h~
36h, after having reacted, obtains hydrothermal product；
（2）Hydrothermal product is centrifuged, centrifugal speed is 10000rpm~12000rpm, takes centrifugation gained precipitation to carry out
Washing, then dries, obtains molybdenum disulfide/carbonyl iron composite microwave absorbent of core shell structure.
In the preparation method of the molybdenum disulfide of above-mentioned core shell structure/carbonyl iron composite microwave absorbent, it is preferred that described
Step（1）In, the mol ratio of the molybdenum in the molybdenum source and the sulphur in the sulphur source is 1: 2~5, the MoS of theory generation2With it is described
The mass ratio of carbonyl iron powder and micron is 1: 1~5.
In the preparation method of the molybdenum disulfide of above-mentioned core shell structure/carbonyl iron composite microwave absorbent, it is preferred that described
Step（1）In, the molybdenum source is sodium molybdate, and the sulphur source is thiocarbamide CS (NH2)2Or thioacetamide CH3CSNH2。
In the preparation method of the molybdenum disulfide of above-mentioned core shell structure/carbonyl iron composite microwave absorbent, it is preferred that described
Step（1）In, particle diameter≤10 μm of carbonyl iron powder and micron.
In the preparation method of the molybdenum disulfide of above-mentioned core shell structure/carbonyl iron composite microwave absorbent, it is preferred that described
Step（1）In, the carbonyl iron powder and micron mixed with water after stir 15min~30min, then add molybdenum source stirring 15min~
30min, adds sulphur source stirring 15min~30min.
In the preparation method of the molybdenum disulfide of above-mentioned core shell structure/carbonyl iron composite microwave absorbent, it is preferred that described
Step（1）In, the pH value of the mixed liquor is adjusted to 7.0 using ammoniacal liquor and watery hydrochloric acid.
In the preparation method of the molybdenum disulfide of above-mentioned core shell structure/carbonyl iron composite microwave absorbent, it is preferred that described
Step（2）In, the time of the centrifugation is 10min~15min.
In the preparation method of the molybdenum disulfide of above-mentioned core shell structure/carbonyl iron composite microwave absorbent, it is preferred that described
Step（2）In, the precipitation is washed 2~3 times respectively through deionized water and absolute ethyl alcohol, and the temperature of the drying is 60 DEG C~80
DEG C, the time of the drying is 7h~10h.
The step of preparation method of the present invention（1）In, the water of addition is with can with fully dispersed carbonyl iron powder and micron and fully
Dissolving molybdenum source and sulphur source are defined.
The main innovation point of the present invention is：In terms of composition, by the molybdenum disulfide based on dielectric loss type with magnetic loss
Carbonyl iron based on type is combined, and material is had dielectric loss and magnetic loss characteristic concurrently, so can not only be improved material to electromagnetic wave
Absorptivity, and impedance matching can be improved, most electromagnetic waves is entered the inside of absorbing material.In configuration aspects,
Two kinds of absorbents are designed to core shell structure, the undue agglomeration of molybdenum disulfide nano powder is avoided that；Utilize chemically stable simultaneously
The good MoS of property2Carbonyl iron is coated, the antiseptic power of carbonyl iron can be improved；By the low molybdenum disulfide of electrical conductivity and height
The carbonyl iron of electrical conductivity is combined, and conducting particles can also be made effectively to disperse, so as to avoid Kelvin effect to the unfavorable of magnetic conductivity
Influence, it is ensured that the normal performance of carbonyl iron magnetic loss ability.In addition, the introducing of interfacial effect is to further enhancing the micro- of material
Ripple absorbability is also highly beneficial.In preparation method, the hydro-thermal method of use is also particularly suitable for being formed in situ of core shell structure, two
Plant being uniformly distributed and the strong regulation and control to composition and pattern for material.Mentioned component, the design of structures and methods are conducive to
Obtain a kind of new and effective microwave absorption.
Compared with prior art, the advantage of the invention is that：
1st, the matching thickness of composite microwave absorbent of the invention is 1.7mm~3.3mm, maximum reflection loss value be -65dB~-
35dB, reflection loss value is less than -10dB effective loss with a width of 2.2GHz~5.0GHz.It is right when matching thickness is 1.9mm
The electromagnetic wave highest reflection loss value of 2~18GHz frequency ranges reaches -58.95dB, and peak value is located at 12.50GHz, reflection loss
Effective bandwidth of the value less than -10dB is 3.57GHz.Usual wave-absorbing effect should consider three parameters：Coating layer thickness, most
High reflection loss value and effective bandwidth, preferable absorbent are desirable in the case where thickness is as thin as possible, and reflection loss value is most
May high, effective bandwidth it is as wide as possible, and the composite microwave absorbent of the present invention be obtained in these three efficacy parameters it is aobvious
Progress is write, closer to " thin, light, the wide, strong " requirement of desirable absorption agent.The material can be used as simulation and stealthy and mobile phone, household electric
The protection occasion of some electromagnetic radiation such as device.
2nd, the present invention mixes molybdenum source, sulphur source with carbonyl iron, using carbonyl iron as template（Template）, it is in situ using hydro-thermal method
Synthesize by core of carbonyl iron, molybdenum disulfide nano powder uniformly wraps up core shell structure composite absorber outside it, wherein carbonyl
Iron is magnetic loss type absorbent, and molybdenum disulfide is dielectric loss type absorbent, and this design can not only improve material to electromagnetic wave
Absorptivity, improve impedance matching.Moreover, core shell structure is avoided that the undue agglomeration of molybdenum disulfide nano powder；Utilize simultaneously
The good molybdenum disulfide of chemical stability is coated to carbonyl iron, can improve the antiseptic power of carbonyl iron；Electrical conductivity is low
Molybdenum disulfide and the carbonyl iron of high conductivity are compound, conducting particles can also be made effectively to disperse, so as to avoid Kelvin effect pair
The adverse effect of magnetic conductivity, it is ensured that the normal performance of carbonyl iron magnetic loss ability.In addition, the introducing of interfacial effect is to further
The microwave absorption capacity of reinforcing material is also highly beneficial.Test result shows that above processing can improve microwave absorption peak really
Value, widens microwave absorption frequency band, and substantially reduce matching thickness, meet required by absorbing material " it is thin, light, wide,
Target by force ", is a kind of preferable high performance microwave absorbent.
3rd, preparation method of the invention is simple and easy to apply, and production cost is relatively low, is adapted to the industrialized production of certain scale.
Brief description of the drawings
Fig. 1 is the XRD spectrum of composite microwave absorbent prepared by the embodiment of the present invention 1.
Fig. 2 is the SEM image of composite microwave absorbent prepared by the embodiment of the present invention 1.
Fig. 3 is the reflection loss collection of illustrative plates of composite microwave wave absorbing agent prepared by the embodiment of the present invention 1（Absorbent contents
80wt%）.
Fig. 4 is the reflection loss collection of illustrative plates of composite microwave wave absorbing agent prepared by the embodiment of the present invention 2（Absorbent contents
80wt%）.
Fig. 5 is the reflection loss collection of illustrative plates of composite microwave wave absorbing agent prepared by the embodiment of the present invention 3（Absorbent contents
80wt%）.
Fig. 6 is the reflection loss collection of illustrative plates of composite microwave wave absorbing agent prepared by comparative example 1（Absorbent contents 80wt%）.
Embodiment
Below in conjunction with Figure of description and specific preferred embodiment, the invention will be further described, but not therefore and
Limit the scope of the invention.
Material and instrument employed in following examples are commercially available.
Embodiment 1：
A kind of molybdenum disulfide of core shell structure of the invention/carbonyl iron composite microwave absorbent, the composite microwave absorbent is main
It is made up of molybdenum disulfide nano powder and carbonyl iron, composite microwave absorbent is using carbonyl iron as core, and molybdenum disulfide nano powder is equal
Even be wrapped in outside carbonyl iron forms core shell structure.
A kind of preparation method of the molybdenum disulfide of the core shell structure of above-mentioned the present embodiment/carbonyl iron composite microwave absorbent,
Comprise the following steps：
（1）Weigh 2.42g sodium molybdate dihydrates Na respectively with assay balance2MoO4·2H2O（0.010mol）, 3.0g is thio
Acetamide CH3CSNH2（0.040mol）, and with theory generation MoS2Quality is into the carbonyl iron powder and micron 1.60g of 1: 1 ratio, carbonyl
Particle diameter≤10 μm of base iron powder and micron, preferable particle size≤2 μm.Carbonyl iron powder and micron is poured into 500ml beakers first, added
120ml deionized waters, magnetic agitation 15min adds load weighted sodium molybdate dihydrate, and magnetic agitation 15min makes reaction
Thing fully dissolves, and is eventually adding load weighted thioacetamide, continues magnetic agitation 15min, it is fully dissolved.With ammoniacal liquor and
Watery hydrochloric acid regulation gained mixture solution system pH to 7.0, gained reaction solution is transferred in the hydro-thermal reaction that volume is 150ml
In sleeve, inner sleeve is placed in stainless steel outer sleeve cylinder, sealing.24 h are reacted under 220 DEG C of environment.
（2）After the completion of reaction, hydrothermal product is taken out, 10000rpm high speed centrifugations 10min in centrifuge tube is placed in, takes ttom of pipe
After product washs 2~3 times respectively through deionized water and absolute ethyl alcohol, 60 DEG C of oven drying 8h are put into, final product, i.e. core is obtained
The molybdenum disulfide of shell structure/carbonyl iron composite microwave absorbent.Use X-ray diffractometer（Bruker, D8 Advance）Test water
The crystal structure of hot, as shown in figure 1, being wherein located at 44.5 ° of diffraction maximum by α-Fe（JCPDS card No.06-0696）
Contribution, and the molybdenum disulfide of Hydrothermal Synthesiss is then non crystalline structure.Use field emission scanning electron microscope（TESCAN, VEGA 3
SBH）Powder morphology is observed, as shown in Fig. 2 showing that Hydrothermal Synthesiss product is the flower-like structure that nanometer sheet is accumulated（Also it is in granulated
State）, the lateral dimension of the nanometer sheet is less than 100nm.Because test sample is magnetic, but electro microscope energy spectrum test flower-like structure surface
Fe elements, only Mo and S elements are not found, and mol ratio is close to 1: 2, therefore it is concluded that：Flower-like structure surface
Nanometer sheet composition is molybdenum disulfide, and carbonyl iron is wrapped in the inside of flower-like structure, form using carbonyl iron micron particles as
Core, molybdenum disulfide nano powder is uniformly wrapped in the core shell structure outside carbonyl iron micron particles.
The composite microwave absorbent that the present embodiment is obtained is well mixed with melt paraffin in mass ratio 4: 1, in a mold
Internal diameter is pressed into for 3mm, external diameter is 7mm, coaxial rings sample of the thickness in 2.5mm.Using waveguide method, vector network analysis is utilized
Instrument（Agilent8720ET）Absorption characteristic of the product to the electromagnetic wave of 2~18GHz frequency ranges is detected, as shown in figure 3,
With thickness be 1.9mm, now reflection loss value be less than -10dB effective bandwidth be 3.57GHz, maximum reflection loss value for -
58.95dB, peak value is located at 12.50GHz.Compared with the carbonyl iron powder and micron directly bought, the matching of pure carbonyl iron powder and micron is thick
When spending for 2.4mm, effective bandwidth 4.96GHz, maximum reflection loss value is -40.68dB, the composite microwave absorbent of the present embodiment
Effective bandwidth is lower slightly, but matching thickness is substantially reduced, and 1.9mm is down to from 2.4mm, while maximum reflection loss value is significantly improved,
It is changed into -58.95dB from -40.68dB；It is suitable in thickness compared with the pure molybdenum disulfide of Hydrothermal Synthesiss under the same terms（1.9~
2mm）In the case of, the maximum reflection loss value of the composite microwave absorbent of the present embodiment is also significantly increased, and is become from -25.01dB
For -58.95dB.
Embodiment 2：
A kind of molybdenum disulfide of core shell structure of the invention/carbonyl iron composite microwave absorbent, the composite microwave absorbent is main
It is made up of molybdenum disulfide nano powder and carbonyl iron, using carbonyl iron as core, molybdenum disulfide nano powder is uniformly wrapped in carbonyl iron
Outer formation core shell structure.
A kind of preparation method of the molybdenum disulfide of the core shell structure of above-mentioned the present embodiment/carbonyl iron composite microwave absorbent,
Preparation process is substantially the same manner as Example 1, differs only in：Step（1）Theory generation MoS2With the quality of carbonyl iron powder and micron
Than for 1: 2.As shown in figure 4, composite microwave absorbent is when matching thickness is 2.3mm, to the electromagnetism of 2~18GHz frequency ranges
The loss of ripple maximum reflection reaches -55.94dB, and effectively loss bandwidth reaches 2.74GHz.
Embodiment 3：
A kind of molybdenum disulfide of core shell structure of the invention/carbonyl iron composite microwave absorbent, the composite microwave absorbent is main
It is made up of molybdenum disulfide nano powder and carbonyl iron, using carbonyl iron as core, molybdenum disulfide nano powder is uniformly wrapped in carbonyl iron
Outer formation core shell structure.
A kind of preparation method of the molybdenum disulfide of the core shell structure of above-mentioned the present embodiment/carbonyl iron composite microwave absorbent,
Step is substantially the same manner as Example 1, differs only in：Step（1）Theory generation MoS2Mass ratio with carbonyl iron powder and micron is 1
∶4.As shown in figure 5, composite microwave absorbent is when matching thickness is 3.3mm, it is maximum to the electromagnetic wave of 2~18GHz frequency ranges
Reflection loss reaches -45.86dB, and effectively loss bandwidth reaches 2.89GHz.
Embodiment 4：
A kind of molybdenum disulfide of core shell structure of the invention/carbonyl iron composite microwave absorbent, the composite microwave absorbent is main
It is made up of molybdenum disulfide nano powder and carbonyl iron, using carbonyl iron as core, molybdenum disulfide nano powder is uniformly wrapped in carbonyl iron
Outer formation core shell structure.
A kind of preparation method of the molybdenum disulfide of the core shell structure of above-mentioned the present embodiment/carbonyl iron composite microwave absorbent,
Step is substantially the same manner as Example 1, differs only in：Step（1）Sodium molybdate dihydrate and thioacetamide mole feed intake
Than for 1: 3.5.Composite microwave absorbent is when matching thickness is 3mm, to the electromagnetic wave maximum reflection of 2~18GHz frequency ranges
Loss reaches -48.16dB, and effectively loss bandwidth reaches 2.21GHz.
Embodiment 5：
A kind of molybdenum disulfide of core shell structure of the invention/carbonyl iron composite microwave absorbent, the composite microwave absorbent is main
It is made up of molybdenum disulfide nano powder and carbonyl iron, using carbonyl iron as core, molybdenum disulfide nano powder is uniformly wrapped in carbonyl iron
Outer formation core shell structure.
A kind of preparation method of the molybdenum disulfide of the core shell structure of above-mentioned the present embodiment/carbonyl iron composite microwave absorbent,
Step is substantially the same manner as Example 1, differs only in：Step（1）Hydrothermal temperature is 180 DEG C.Composite microwave absorbent is in matching
When thickness is 1.9mm, the electromagnetic wave maximum reflection loss to 2~18GHz frequency ranges reaches -52.81dB, and bandwidth is effectively lost
Up to 3.68GHz.
Embodiment 6：
A kind of molybdenum disulfide of core shell structure of the invention/carbonyl iron composite microwave absorbent, the composite microwave absorbent is main
It is made up of molybdenum disulfide nano powder and carbonyl iron, using carbonyl iron as core, molybdenum disulfide nano powder is uniformly wrapped in carbonyl iron
Outer formation core shell structure.
A kind of preparation method of the molybdenum disulfide of the core shell structure of above-mentioned the present embodiment/carbonyl iron composite microwave absorbent,
Step is substantially the same manner as Example 1, differs only in：Step（1）The hydro-thermal reaction time is 36h.Composite microwave absorbent
During with thickness for 2.0mm, the electromagnetic wave maximum reflection loss to 2~18GHz frequency ranges reaches -54.21dB, and band is effectively lost
Width reaches 3.45GHz.
Comparative example 1：
This comparative example is as different from Example 1：Step（1）Carbonyl iron micro-powder is not added.As shown in fig. 6, pure curing
Molybdenum absorbent is suitable with the composite microwave absorbent thickness of embodiment 1 in thickness（2mm）When, to the electricity of 2~18GHz frequency ranges
The loss of magnetic wave maximum reflection only has -19.46dB, and reflection loss reaches -10dB effective loss with a width of 3.65GHz, peak value position
In 11.15GHz.
Comparative example 2：
This comparative example is as different from Example 1：Step（1）Theory generation MoS2Mass ratio with carbonyl iron powder and micron is 1: 6.
Composite absorber reaches when matching thickness is 3.6mm, to the loss of the electromagnetic wave maximum reflections of 2~18GHz frequency ranges-
32.11dB, effectively loss bandwidth reaches 1.86GHz.
The above described is only a preferred embodiment of the present invention, not making any formal limitation to the present invention.Though
So the present invention is disclosed as above with preferred embodiment, but is not limited to the present invention.It is any to be familiar with those skilled in the art
Member, in the case where not departing from the Spirit Essence and technical scheme of the present invention, all using in the methods and techniques of the disclosure above
Appearance makes many possible variations and modification to technical solution of the present invention, or is revised as the equivalent embodiment of equivalent variations.Therefore,
Every content without departing from technical solution of the present invention, the technical spirit according to the present invention is to made for any of the above embodiments any simple
Modification, equivalent substitution, equivalence changes and modification, still fall within technical solution of the present invention protection in the range of.
Claims (10)
1. the molybdenum disulfide of a kind of core shell structure/carbonyl iron composite microwave absorbent, it is characterised in that the composite microwave absorbs
Agent is mainly made up of molybdenum disulfide nano powder and carbonyl iron, and using carbonyl iron as core, molybdenum disulfide nano powder is uniformly wrapped in
Core shell structure is formed outside carbonyl iron.
2. the molybdenum disulfide of core shell structure according to claim 1/carbonyl iron composite microwave absorbent, it is characterised in that
The matching thickness of the composite microwave absorbent is 1.7mm~3.3mm, and maximum reflection loss value is -65dB~-35dB, reflection
Loss value is less than -10dB effective loss with a width of 2.2GHz~5.0GHz.
3. a kind of preparation method of the molybdenum disulfide of core shell structure/carbonyl iron composite microwave absorbent, comprises the following steps：
（1）Carbonyl iron powder and micron is mixed with water, successively molybdenum source is added and sulphur source fully dissolves, the pH value of gained mixed liquor is adjusted
Section carries out hydro-thermal reaction to neutrality under air-proof condition, and reaction temperature is 160 DEG C~240 DEG C, the reaction time be 18h~
36h, after having reacted, obtains hydrothermal product；
（2）Hydrothermal product is centrifuged, centrifugal speed is 10000rpm~12000rpm, takes centrifugation gained precipitation to carry out
Washing, then dries, obtains molybdenum disulfide/carbonyl iron composite microwave absorbent of core shell structure.
4. the preparation method of the molybdenum disulfide of core shell structure according to claim 3/carbonyl iron composite microwave absorbent, its
It is characterised by, the step（1）In, the mol ratio of the molybdenum in the molybdenum source and the sulphur in the sulphur source is 1: 2~5, and theory is raw
Into MoS2Mass ratio with the carbonyl iron powder and micron is 1: 1~5.
5. the preparation method of the molybdenum disulfide of core shell structure according to claim 4/carbonyl iron composite microwave absorbent, its
It is characterised by, the step（1）In, the molybdenum source is sodium molybdate, and the sulphur source is thiocarbamide CS (NH2)2Or thioacetamide
CH3CSNH2。
6. the molybdenum disulfide of the core shell structure according to any one of claim 3~5/carbonyl iron composite microwave absorbent
Preparation method, it is characterised in that the step（1）In, particle diameter≤10 μm of carbonyl iron powder and micron.
7. the molybdenum disulfide of the core shell structure according to any one of claim 3~5/carbonyl iron composite microwave absorbent
Preparation method, it is characterised in that the step（1）In, the carbonyl iron powder and micron stirs 15min~30min after being mixed with water,
Then molybdenum source stirring 15min~30min is added, sulphur source stirring 15min~30min is added.
8. the molybdenum disulfide of the core shell structure according to any one of claim 3~5/carbonyl iron composite microwave absorbent
Preparation method, it is characterised in that the step（1）In, the pH value of the mixed liquor is adjusted to 7.0 using ammoniacal liquor and watery hydrochloric acid.
9. the molybdenum disulfide of the core shell structure according to any one of claim 3~5/carbonyl iron composite microwave absorbent
Preparation method, it is characterised in that the step（2）In, the time of the centrifugation is 10min~15min.
10. the molybdenum disulfide of the core shell structure according to any one of claim 3~5/carbonyl iron composite microwave absorbent
Preparation method, it is characterised in that the step（2）In, the precipitation washs 2~3 respectively through deionized water and absolute ethyl alcohol
Secondary, the temperature of the drying is 60 DEG C~80 DEG C, and the time of the drying is 7h~10h.
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| CN108559262A (en) * | 2018-02-09 | 2018-09-21 | 青海大学 | A kind of transient metal sulfide-silicon carbide fibre multi-scale reinforcing body reinforced resin based structures absorbing material and preparation method thereof |
| CN109943285A (en) * | 2019-04-16 | 2019-06-28 | 贵州大学 | A kind of high-performance wave-absorbing material core-shell structure CoxFe3-xO4@MoS2Nano-complex and its synthetic method |
| CN113613479A (en) * | 2021-07-16 | 2021-11-05 | 复旦大学 | Micron tube microwave absorbing material assembled by core-shell spindle array and preparation and application thereof |
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| CN107761364A (en) * | 2017-11-03 | 2018-03-06 | 西北工业大学 | A kind of ferroso-ferric oxide/molybdenum disulfide/carbon fiber composite wave-suction material and the preparation method for passing through two-step reaction |
| CN107761364B (en) * | 2017-11-03 | 2019-10-22 | 西北工业大学 | A kind of ferroso-ferric oxide/molybdenum disulfide/carbon fiber composite wave-suction material and the preparation method by two-step reaction |
| CN108559262A (en) * | 2018-02-09 | 2018-09-21 | 青海大学 | A kind of transient metal sulfide-silicon carbide fibre multi-scale reinforcing body reinforced resin based structures absorbing material and preparation method thereof |
| CN109943285A (en) * | 2019-04-16 | 2019-06-28 | 贵州大学 | A kind of high-performance wave-absorbing material core-shell structure CoxFe3-xO4@MoS2Nano-complex and its synthetic method |
| CN109943285B (en) * | 2019-04-16 | 2021-09-17 | 贵州大学 | High-performance wave-absorbing material core-shell structure CoxFe3-xO4@MoS2Nano-composite and synthesis method thereof |
| CN113613479A (en) * | 2021-07-16 | 2021-11-05 | 复旦大学 | Micron tube microwave absorbing material assembled by core-shell spindle array and preparation and application thereof |
| CN115634661A (en) * | 2022-10-25 | 2023-01-24 | 唐山师范学院 | Efficient adsorbent and preparation method and application thereof |
| CN115634661B (en) * | 2022-10-25 | 2023-11-21 | 唐山师范学院 | Efficient adsorbent and preparation method and application thereof |
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