CN106811750B - A kind of nano-porous gold metal particles and preparation method thereof - Google Patents
A kind of nano-porous gold metal particles and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of preparation methods of nano-porous gold metal particles comprising following steps: (1) providing a magnesium base alloy band, the subject organization of the magnesium base alloy band is amorphous phase, and the chemical atomic metering-type of the magnesium base alloy band is MgaXbMcRd, R is the mixing of rare earth element or rare earth element and other active elements, the MgaXbMcRdIn at least one of containing Cu, Ni, wherein 40%≤a≤80%, 5%≤b≤30%, 5%≤c≤30%, 1%≤d≤30%, a+b+c+d=100%；(2) the magnesium base alloy band is carried out first with the first acid solution goes alloy to react, react Mg in the magnesium base alloy band with R class atom with the hydrogen ion in first acid solution, nano porous metal band is formed, wherein the nano porous metal band contains X atom and M atom；(3) the nano porous metal band is added in the second acid solution, and ultrasound progress simultaneously second goes alloy to react, so that the M atom in nano porous metal band is reacted with the hydrogen ion in second acid solution, forms nano-porous gold metal particles.The present invention also provides a kind of nano-porous gold metal particles.
Description
Technical field
The present invention relates to technical field of metal material more particularly to a kind of nano-porous gold metal particles and preparation method thereof.
Background technique
Nano porous metal material refers to aperture in 100 rans or lower, and porosity is greater than 40%, has high ratio
The porosu solid metal material of surface area.Nano porous metal material not only has a big internal surface area, high porosity and relatively
Even nano-pore, and the high thermal conductivity with metal material, high conductivity is anticorrosive to wait excellent properties, thus is urging it
Change, new energy, photoelectric field have important application, such as biology, pharmaceutical ultrafiltration or even nanofiltration medium, height in fuel cell
Specific surface area catalyst carrier, the selective absorbing etc. of protein molecular in medical diagnosis.Result of study shows nano porous metal
Electrochemistry capacitance be far longer than existing graphite material, for improve battery cruising ability have tremendous raising.Separately
Outside, skin effect and dimensional effect that nano porous metal material is shown make it in electronics, optics, microfluid and micro-
Seeing mechanics etc. also has huge application prospect.
Currently, the preparation method of nano porous metal material focuses mostly in block body stephanoporate metal material.The side generallyd use
Method has powder metallurgic method, de- alloyage, oblique incidence sedimentation, Colloidal Template Method etc..Wherein, go alloyage be American engineer not
A kind of method that Li Leini is invented in last century the '20s.This method can pass through element relatively active in resistant alloy
To prepare nano porous metal material.Due to going the macro-size of the material of alloy reaction front and back generally to change less, if it is desired to
Obtain smaller nano-porous materials, such as nano-porous gold metal particles of the partial size less than 5 microns, it is necessary to prepare first same
The presoma alloying pellet of sample size.The limit of the methods of common mechanical ball mill pulverized particles can reach 1 micron~5 microns,
However, such method there are it is with high costs, be easily introduced the shortcomings that impurity, and such method is only applicable to brittleness presoma alloy
It is broken.
Summary of the invention
In view of this, it is necessory to provide a kind of preparation of nano-porous gold metal particles that are at low cost, not being easily introduced impurity
Method.The partial size of the nano-porous gold metal particles obtained by the preparation method is smaller.
The present invention provides a kind of preparation method of nano porous metal comprising following steps:
(1) a magnesium base alloy band is provided, and the subject organization of the magnesium base alloy band is amorphous phase, the magnesium base alloy band
Chemical atomic metering-type be MgaXbMcRd, one or more of X Cu, Ag, Au, Pd, Pt, Zr, Ti, Hf, Ta, Nb, Mo,
M is at least one of Ni, Cu, Fe, Co, and X and M do not contain Cu simultaneously, R be rare earth element or rare earth element and Zn, Al,
The mixing of at least one of Li, K, Ca, the MgaXbMcRdIn at least one of containing Cu, Ni, wherein 40%≤a≤80%,
5%≤b≤30%, 5%≤c≤30%, 1%≤d≤30%, a+b+c+d=100%；
(2) the magnesium base alloy band is carried out first with the first acid solution goes alloy to react, and makes Mg in the magnesium base alloy band
It is reacted with R class atom with the hydrogen ion in first acid solution, forms ion and enter solution, to obtain nano porous metal
Band, wherein the nano porous metal band contains X atom and M atom；And
(3) the nano porous metal band is added in the second acid solution, and ultrasound progress simultaneously second goes alloy to react,
So that the M atom in nano porous metal band is reacted with the hydrogen ion in second acid solution, and the nanoporous simultaneously
Metal band forms nano-porous gold metal particles by ultrasonication.
The present invention also provides a kind of nano-porous gold metal particles obtained using above-mentioned preparation method, the nano-porous golds
The size of metal particles is 0.1 micron~10 microns, the nanoporous " frenulum " in the nano-porous gold metal particles
(ligaments) characteristic size is 10 nanometers~500 nanometers.
Compared with prior art, the preparation method of nano porous metal provided by the invention has the advantage that
First, by successively using the first acid solution and the second acid solution to go to close to the magnesium base alloy band two steps of progress
Aurification reaction.Specifically, Mg very active first in the magnesium base alloy band and R class atom and the first acid containing rare earth element
The hydrogen ion of solution reacts, and X atom and M atom retain, and obtains nano porous metal band；Then in the fragmentation of ultrasound
Under, the medium active M atom in the nano porous metal band is reacted with the hydrogen ion in second acid solution, and inert
X atom is not reacted with hydrogen ion, finally obtains nano-porous gold metal particles.
Second, since the subject organization of the magnesium base alloy band is amorphous phase, it is ensured that when first in magnesium base alloy band
Element combination reaches 4 kinds or when more than 4 kind, organizes to remain as the more uniform single-phase of ingredient, is thus conducive to two-stage and goes
Alloy reaction ultimately forms the more uniform nano-porous gold metal particles of tiny and granular size.
Third acts on while by ultrasound with the second acid solution, larger-size nano porous metal item is made to bring one into
Walking fragmentation becomes the lesser nano-porous gold metal particles of partial size.Specifically, due to nano porous metal band have become it is porous
Structure, porosity with higher are gone in alloy reaction process second, and X atom is easy for occurring big when further recombinating
Amount combines the region of " mismatch ", and porous " frenulum " is caused crack occur.At this time under the action of ultrasound, the fissare nanometer of the tool
Porous metals band will be easier to be broken, and ultimately form the smaller nano-porous gold metal particles of partial size.
In addition, this preparation method is simple, it is not easy to bring impurity into, it is easily operated, it is suitble to industrialization.It is final by the preparation method
The partial size of obtained nano-porous gold metal particles is smaller, it can be achieved that at 10 microns hereinafter, having a good application prospect.
Detailed description of the invention
Fig. 1 is the scanning electron microscope macrograph for the nanoporous AgCu band that embodiment 1 obtains.
Fig. 2 is the stereoscan photograph in the nanoporous AgCu band section that embodiment 1 obtains.
Fig. 3 is the scanning electron microscope high power photo in the nanoporous AgCu band section that embodiment 1 obtains.
Fig. 4 is the stereoscan photograph for the nanoporous AgCu particle that embodiment 1 obtains.
Fig. 5 is the photo that nanoporous AgCu particle made from embodiment 1 stands 12 hours after ultrasonic disperse in ethanol.
Fig. 6 is the transmission electron microscope photo for the nanoporous AgCu particle that embodiment 1 obtains.
Fig. 7 is the transmission electron microscope energy spectrum diagram of nanoporous AgCu particle made from embodiment 1.
Fig. 8 is the stereoscan photograph for the nanoporous Ag particle that embodiment 2 obtains.
Fig. 9 is the transmission electron microscope power spectrum of the final nanoporous Ag particle obtained of embodiment 2.
Figure 10 is the transmission electron microscope photo of nanoporous Cu particle made from embodiment 3.
Figure 11 is the transmission electron microscope energy spectrum diagram of nanoporous Cu particle made from embodiment 3.
Following specific embodiment will further illustrate the present invention in conjunction with above-mentioned attached drawing.
Specific embodiment
Nano-porous gold metal particles provided by the invention and preparation method thereof will be described further below.
The present invention provides a kind of preparation method of nano-porous gold metal particles comprising following steps:
S1, provides a magnesium base alloy band, and the subject organization of the magnesium base alloy band is amorphous phase, the magnesium base alloy band
Chemical atomic metering-type be MgaXbMcRd, one or more of X Cu, Ag, Au, Pd, Pt, Zr, Ti, Hf, Ta, Nb, Mo,
M is at least one of Ni, Cu, Fe, Co, and X and M do not contain Cu simultaneously, R be rare earth element or rare earth element and Zn, Al,
The mixing of at least one of Li, K, Ca, the MgaXbMcRdIn at least one of containing Cu, Ni, wherein 40%≤a≤80%,
5%≤b≤30%, 5%≤c≤30%, 1%≤d≤30%, a+b+c+d=100%；
The magnesium base alloy band is carried out first with the first acid solution and alloy is gone to react, made in the magnesium base alloy band by S2
Mg is reacted with R class atom with the hydrogen ion in first acid solution, is formed ion and is entered solution, to obtain nano-porous gold
Belong to band, wherein the nano porous metal band contains X atom and M atom；And
The nano porous metal band is added in the second acid solution S3, and ultrasound progress simultaneously second goes alloy to react,
So that the M atom in nano porous metal band is reacted with the hydrogen ion in second acid solution, and the nanoporous simultaneously
Metal band forms nano-porous gold metal particles by ultrasonication.
In step sl, the subject organization of the magnesium base alloy band is amorphous phase, to guarantee that the magnesium base alloy band exists
First goes in alloy reaction to form the more uniform nano porous metal alloy XM of tiny and granular size.Preferably, the magnesium-based
The volumn concentration of amorphous phase in alloy strip is more than or equal to 50%.It is furthermore preferred that non-in the magnesium base alloy band
The volumn concentration of crystal phase is more than or equal to 95%.Not only contain magnesium and rare earth element in the magnesium base alloy band, but also
Containing metallic element Ni or Cu, this can make the magnesium base alloy band amorphous formation ability with higher.The magnesium base alloy item
Band is prepared by the following method:
Raw material is weighed according to formula；
Raw material is mixed and melts to obtain alloy melt；And
The alloy melt is prepared into the magnesium base alloy band of thin ribbon shaped by the method that solidifies fastly, wherein the magnesium-based is closed
Gold bar band with a thickness of 10 microns~100 microns, width and length are unlimited.
The magnesium base alloy band that thinner thickness is obtained by the method solidified fastly, is conducive to the amorphous of the magnesium base alloy band
The formation of phase.
Preferably, 40%≤a≤75%, 3%≤d≤25%.This is because rare earth element contains within the scope of certain ingredients
The raising of amount is more advantageous to the formation of amorphous phase or can also obtain complete amorphous phase in thicker band.
In step s 2, Mg very active in the magnesium base alloy band with containing rare earth element R atom and first acid it is molten
The hydrogen ion of liquid reacts, and obtains nano porous metal band.Described first reaction time for going alloy to react was 1 minute~100
Minute.Described first reaction temperature for going alloy to react is -30 DEG C~80 DEG C.Do not have when in the reaction process that first goes alloy to react
After thering is obvious bubble to generate, it can determine that the reaction is completed.
In first acid solution solute be sulfuric acid, hydrochloric acid, nitric acid, perchloric acid, phosphoric acid, acetic acid, oxalic acid, formic acid, carbonic acid,
At least one of gluconic acid, oleic acid, polyacrylic acid.The molar concentration of solute is 0.01mol/L in first acid solution
~10mol/L.Preferably, the molar concentration of solute is 0.01mol/L~5mol/L in first acid solution.First acid
Solvent in solution is at least one of water, methanol, ethyl alcohol, isopropanol, acetone.
In step s3, the medium active M atom in the nano porous metal band and the hydrogen in second acid solution
Ionic reaction, and inert X atom is not reacted with hydrogen ion, finally obtains nano-porous gold metal particles.Second acid solution
In in hydrionic molar concentration first acid solution hydrionic molar concentration it is high so that some or all M
Atom can be removed by reaction.
The partial size of the nano-porous gold metal particles is smaller than the partial size of nano porous metal band, the nano-porous gold metal particles
Middle M atom content is fewer than the middle M atom content of nano porous metal band.It is appreciated that going alloy to react described second
In the process, according to the carry out degree of reaction and the difference of the self property of M atom, M atom and the hydrionic extent of reaction
It will be different, some or all M atoms is removed, to might have in obtained nano-porous gold metal particles
A small amount of metallic atom M exists, but this has no effect on the application of the nano-porous gold metal particles.In addition, going alloy to react first
In Mg the and R class atom that is not removed completely, described second go alloy react under the action of concentration higher hydrogen ion
And it is removed completely.
Solute is at least one of sulfuric acid, hydrochloric acid, nitric acid, perchloric acid in second acid solution.Second acid is molten
The molar concentration of solute is 0.5mol/L~15mol/L in liquid.Preferably, the molar concentration of solute is in second acid solution
1mol/L~15mol/L.Solvent in second acid solution is at least one of water, methanol, ethyl alcohol, isopropanol, acetone.
The reaction temperature of the second alloy reaction is -30 DEG C~80 DEG C.The oscillation frequency of the ultrasound be 5KHz~
500KHz, ultrasonic time are 1 minute~300 minutes.
The present invention also provides a kind of nano-porous gold metal particles obtained using above-mentioned preparation method.The nano porous metal
The size of particle is 0.1 micron~10 microns, and the characteristic size of the nanoporous " frenulum " in the nano-porous gold metal particles is
10 nanometers~500 nanometers.
Compared with prior art, the preparation method of nano-porous gold metal particles provided by the invention has the advantage that
First, by successively using the first acid solution and the second acid solution to go to close to the magnesium base alloy band two steps of progress
Aurification reaction.Specifically, Mg very active first in the magnesium base alloy band and R class atom and the first acid containing rare earth element
The hydrogen ion of solution reacts, and X atom and M atom retain, and obtains nano porous metal band；Then in the fragmentation of ultrasound
Under, the medium active M atom in the nano porous metal band is reacted with the hydrogen ion in second acid solution, and inert
X atom is not reacted with hydrogen ion, finally obtains nano-porous gold metal particles.
Second, since the subject organization of the magnesium base alloy band is amorphous phase, it is ensured that when first in magnesium base alloy band
Element combination reaches 4 kinds or when more than 4 kind, organizes to remain as the more uniform single-phase of ingredient, is thus conducive to two-stage and goes
Alloy reaction ultimately forms the more uniform nano-porous gold metal particles of tiny and granular size.
Third acts on while by ultrasound with the second acid solution, larger-size nano porous metal item is made to bring one into
Walking fragmentation becomes the lesser nano-porous gold metal particles of partial size.Specifically, due to nano porous metal band have become it is porous
Structure, porosity with higher are gone in alloy reaction process second, and X atom is easy for occurring big when further recombinating
Amount combines the region of " mismatch ", and porous " frenulum " is caused crack occur.At this time under the action of ultrasound, the fissare nanometer of the tool
Porous metals band will be easier to be broken, and ultimately form the smaller nano-porous gold metal particles of partial size.
In addition, this preparation method is simple, it is not easy to bring impurity into, it is easily operated, it is suitble to industrialization.It is final by the preparation method
The partial size of obtained nano-porous gold metal particles is smaller, it can be achieved that at 10 microns hereinafter, having a good application prospect.
Hereinafter, will further illustrate in conjunction with specific embodiments.
Embodiment 1
(1) selecting chemical atomic metering-type is Mg60Ag15Cu15Gd10Amorphous magnesium base alloy band, according to the chemical atomic
Metering-type weighs raw material, and preparing width by the method that copper roller gets rid of band after melting is 2 millimeters, with a thickness of 20 microns
Mg60Ag15Cu15Gd10Amorphous magnesium base alloy band.
(2) at room temperature, by Mg made from 0.25 gram of step (1)60Ag15Cu15Gd10Amorphous magnesium base alloy band submerges 100mL
Concentration is to carry out first in the aqueous hydrochloric acid solution of 0.25mol/L alloy is gone to react.In reaction process, the active Mg of chemical property with
Rare-earth Gd atoms are reacted with hydrogen ion to be become ion and enters solution, and Ag and Cu retain to form nanoporous AgCu band.
After 10min, reaction system has no that obvious bubble generates.
(3) above-mentioned solution is removed, rejoins aqueous hydrochloric acid solution that 10mL concentration is 4mol/L (by 2 times of volumes
The concentrated hydrochloric acid of water dilution certain volume 12mol/L obtains) go alloy to react nanoporous AgCu band progress second, while into
Row ultrasound (ultrasonic oscillation frequency is 40KHz).Since Cu atom is only swift in response with the hydrochloric acid of high concentration, in the salt of 4mol/L
Under aqueous acid effect, Cu atom all cannot go alloy reaction removal by second.After reacting 120min, reaction is removed in centrifugation
Solution cleans 2 times with ethyl alcohol to get the smaller nanoporous AgCu particle containing a small amount of Cu atom of partial size is arrived.(3) step
For the nanoporous AgCu band that obtained nanoporous AgCu particle is obtained compared to (2), smaller, Cu atom content
Less.
The nanoporous AgCu band that step (2) is obtained carries out phenetic analysis.As a result referring to Figure 1 to Fig. 3.By Fig. 1
To Fig. 2 as it can be seen that the porous AgCu band after going alloy to react by the first step is ribbon, thickness is about 20 microns, and width is about
It is 2 millimeters.As seen from Figure 3, the nanoporous AgCu band after the first step goes alloy to react has typical nanoporous three-dimensional
Structure.
The nanoporous AgCu particle finally obtained is subjected to phenetic analysis.As a result Fig. 4 is referred to Fig. 7.It can by Fig. 4
See, the magnitude range of the partial size of nanoporous AgCu particle is 100 nanometers~1 micron.And it can by the transmission electron microscope photo of Fig. 6
Find out, shown in the partial size of nanoporous AgCu particle be about 250nm, the characteristic size of " frenulum " is 25nm~45nm.By
Fig. 5 is as it can be seen that Donna metre hole AgCu particle has good suspendability.As seen from Figure 7, in nanoporous AgCu particle in addition to
Except Ag element, also contain certain Cu element.
Embodiment 2
(1) selecting chemical atomic metering-type is Mg60Ag14Ni14Nd10Zn2Amorphous magnesium base alloy band, according to the chemistry
Atom metering-type weighs raw material, and preparing width by the method that copper roller gets rid of band after melting is 2 millimeters, with a thickness of 20 microns
Mg60Ag14Ni14Nd10Zn2Amorphous magnesium base alloy band.
(2) at room temperature, by Mg made from 0.25 gram of step (1)60Ag14Ni14Nd10Zn2Amorphous magnesium base alloy band submerges
150mL concentration is to carry out first in the ethanol solution hydrochloride of 0.1mol/L alloy is gone to react.In reaction process, chemical property is active
Mg, rare earth Nd and Zn atoms are reacted with hydrogen ion to be become ion and enters solution, and Ag and Ni retains and forms nanometer
Porous AgNi band.After 30min, reaction system has no that obvious bubble generates.
(3) above-mentioned solution is removed, rejoins aqueous hydrochloric acid solution that 10mL concentration is 4mol/L (by 2 times of volumes
The concentrated hydrochloric acid of water dilution certain volume 12mol/L obtains) go alloy to react nanoporous AgNi band progress second, while into
Row ultrasound (ultrasonic oscillation frequency is 40KHz).Under the concentration hydrochloric acid solution, Ni atomic energy is all by going alloy reaction to go
It removes.After reacting 120min, reaction solution is removed in centrifugation, cleans 2 times with ethyl alcohol to get nanoporous Ag particle is arrived.
Obtained nanoporous Ag particle is subjected to phenetic analysis.As a result Fig. 8 is referred to Fig. 9.
As seen from Figure 8, the magnitude range of the partial size of nanoporous Ag particle is 500 nanometers~1.5 microns, " frenulum "
Characteristic size is 50nm~400nm.As seen from Figure 9, nanoporous Ag particle is mainly made of Ag element.
Embodiment 3
(1) selecting chemical atomic metering-type is Mg60Cu15Ni15Gd10Amorphous magnesium base alloy band, according to the chemical atomic
Metering-type weighs raw material, and preparing width by the method that copper roller gets rid of band after melting is 2 millimeters, with a thickness of 20 microns
Mg60Cu15Ni15Gd10Amorphous magnesium base alloy band.
(2) at room temperature, by Mg made from 0.25 gram of step (1)60Cu15Ni15Gd10Amorphous magnesium base alloy band submerges 150mL
Concentration is to carry out first in the ethanol solution hydrochloride of 0.1mol/L alloy is gone to react.In reaction process, chemical property is extremely active
Mg reacted with Gd atoms with hydrogen ion and become ion and enter solution, and Cu and Ni retains and forms nanoporous CuNi item
Band.After 30min, reaction system has no that obvious bubble generates.
(3) above-mentioned solution is removed, rejoins aqueous hydrochloric acid solution that 10mL concentration is 1mol/L (by 11 times of volumes
The concentrated hydrochloric acid of water dilution certain volume 12mol/L obtains) go alloy to react nanoporous CuNi band progress second, while into
Row ultrasound (ultrasonic oscillation frequency is 40KHz).Under the concentration hydrochloric acid solution, Ni atomic energy is all by going alloy reaction to go
It removes, and Cu is then relatively stable.After reacting 60min, reaction solution is removed in centrifugation, cleans 2 times with ethyl alcohol to get nanoporous Cu is arrived
Particle.
Obtained nanoporous Cu particle is subjected to phenetic analysis.As a result referring to Figure 10 to Figure 11.
As seen from Figure 10, the partial size of nanoporous Cu particle is about 500nm, the characteristic size of " frenulum " be 40nm~
100nm.As seen from Figure 11, nanoporous Cu particle is mainly made of Cu element.
The above description of the embodiment is only used to help understand the method for the present invention and its core ideas.It should be pointed out that pair
For those skilled in the art, without departing from the principle of the present invention, the present invention can also be carried out
Some improvements and modifications, these improvements and modifications also fall within the scope of protection of the claims of the present invention.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (11)
1. a kind of preparation method of nano-porous gold metal particles comprising following steps:
(1) a magnesium base alloy band is provided, and the subject organization of the magnesium base alloy band is amorphous phase, the change of the magnesium base alloy band
Atom metering-type is MgaXbMcRd, one or more of X Cu, Ag, Au, Pd, Pt, Zr, Ti, Hf, Ta, Nb, Mo, M is
At least one of Ni, Cu, Fe, Co, X and M do not contain Cu simultaneously, R be rare earth element or rare earth element and Zn, Al, Li, K,
The mixing of at least one of Ca, the MgaXbMcRdIn at least one of containing Cu, Ni, wherein 40%≤a≤80%, 5%≤
B≤30%, 5%≤c≤30%, 1%≤d≤30%, a+b+c+d=100%；
(2) the magnesium base alloy band is carried out first with the first acid solution goes alloy to react, and makes Mg and R in the magnesium base alloy band
Class atom is reacted with the hydrogen ion in first acid solution, is formed ion and is entered solution, to obtain nano porous metal item
Band, wherein the nano porous metal band contains X atom and M atom；And
By the nano porous metal band be added the second acid solution in, in second acid solution hydrionic molar concentration compared with
Hydrionic molar concentration is high in first acid solution, and ultrasound progress simultaneously second goes alloy to react, so that nanoporous
M atom in metal band is reacted with the hydrogen ion in second acid solution, and the nano porous metal band is surpassed simultaneously
Sound is broken, forms nano-porous gold metal particles.
2. the preparation method of nano-porous gold metal particles as described in claim 1, which is characterized in that in step (1) 40%≤
A≤75%, 3%≤d≤25%.
3. the preparation method of nano-porous gold metal particles as described in claim 1, which is characterized in that the magnesium in step (1)
Based alloy band is prepared by the following method:
Raw material is weighed according to formula；
Raw material is mixed and melts to obtain alloy melt；And
The alloy melt is prepared into the magnesium base alloy band of thin ribbon shaped by the method that solidifies fastly, wherein the magnesium base alloy item
Band with a thickness of 10 microns~100 microns.
4. the preparation method of nano-porous gold metal particles as described in claim 1, which is characterized in that the magnesium-based in step (1)
The volumn concentration of amorphous phase in alloy strip is more than or equal to 50%.
5. the preparation method of nano-porous gold metal particles as claimed in claim 4, which is characterized in that the magnesium-based in step (1)
The volumn concentration of amorphous phase in alloy strip is more than or equal to 95%.
6. the preparation method of nano-porous gold metal particles as described in claim 1, which is characterized in that step (2) described in
In one acid solution solute be sulfuric acid, hydrochloric acid, nitric acid, perchloric acid, phosphoric acid, acetic acid, oxalic acid, formic acid, carbonic acid, gluconic acid, oleic acid,
At least one of polyacrylic acid, the molar concentration of solute is 0.01mol/L~10mol/L in first acid solution.
7. the preparation method of nano-porous gold metal particles as described in claim 1, which is characterized in that step (3) described in
Solute is at least one of sulfuric acid, hydrochloric acid, nitric acid, perchloric acid, mole of solute in second acid solution in diacid solution
Concentration is 0.5mol/L~15mol/L.
8. the preparation method of nano-porous gold metal particles as described in claim 1, which is characterized in that first acid solution with
And the second solvent in acid solution is at least one of water, methanol, ethyl alcohol, isopropanol, acetone.
9. the preparation method of nano-porous gold metal particles as described in claim 1, which is characterized in that step (3) described in surpass
The oscillation frequency of sound is 5KHz~500KHz, and the ultrasonic time is 1 minute~300 minutes.
10. the preparation method of nano-porous gold metal particles as described in claim 1, which is characterized in that described first removes alloy
The reaction temperature of reaction and the reaction of the second alloy is -30 DEG C~80 DEG C.
11. a kind of nano-porous gold metal particles obtained using the preparation method as described in any one of claim 1~9, feature
It is, the size of the nano-porous gold metal particles is 0.1 micron~10 microns, the nanometer in the nano-porous gold metal particles
The characteristic size of porous " frenulum " is 10 nanometers~500 nanometers.
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