CN102373491A - Method for preparing nanometer materials through electric deposition by reinforced micro electrolysis technology - Google Patents

Method for preparing nanometer materials through electric deposition by reinforced micro electrolysis technology Download PDF

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CN102373491A
CN102373491A CN2011103444903A CN201110344490A CN102373491A CN 102373491 A CN102373491 A CN 102373491A CN 2011103444903 A CN2011103444903 A CN 2011103444903A CN 201110344490 A CN201110344490 A CN 201110344490A CN 102373491 A CN102373491 A CN 102373491A
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micro
electrolysis
nano material
strengthen
electric field
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CN102373491B (en
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徐晓军
王刚
杨津津
高琨阳
朱丽云
聂蕊
刘宇奇
范领东
韩振宇
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Kunming University of Science and Technology
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Abstract

The invention discloses a method for preparing nanometer materials through electric deposition by the reinforced micro electrolysis technology, which belongs to the technical field of nanometer material preparation. The method is characterized in that micro electrolysis fillings consisting of an active anode and an inert cathode are placed into a reinforced micro electrolysis reactor, in addition, deposition liquid water solution is fed into the micro electrolysis reactor, metal ions in the deposition liquid are reduced into metal elementary substance on the surface of the fillings under the reinforcing effect of an external electric field after the reinforced micro electrolysis deposition reaction, the goal of controlling the micro electrolysis reaction process is reached through controlling the field intensity of the external electric field, different field intensities of the external electric field have different promotion and reinforcing effect on the micro electrolysis, the uniformity degrees and the nanometer degrees of the electric deposition particles are also different, and the nanometer materials conforming to the requirements of specific dimension, ingredients and the like are finally prepared. The method has the advantages that the particle diameter of the nanometer materials is controllable, the energy consumption is low, the reaction condition is mild, the operation is simple and convenient, and the like.

Description

A kind of to strengthen the method for micro electrolysis tech prepared by electrodeposition nano material
Technical field
The present invention relates to a kind of method for preparing nano material, relate in particular to a kind of method, belong to the nano material preparation technical field with reinforcement micro electrolysis tech prepared by electrodeposition nano material.
Background technology
Nano material is the type material science that grows up the eighties in 20th century; Compare with common material; Make it have special magnetic, optics, mechanics, electricity, chemical catalysis performance because nano material has small-size effect, surface and interfacial effect, quantum size effect, macro quanta tunnel effect etc., thereby become one of the most attractive popular research of 21 century field of materials.
Preparation method of nano material is varied; Be divided into solid phase method, liquid phase method and vapor phase process from the angle of raw material; Be divided into physics method and chemical method from the angle of reaction, common preparation method has vacuum-evaporation condensation method, ball milled, the precipitator method, sol-gel method, water reaction method, electrodip process, microemulsion method and template synthesis method.Electrodip process more and more receives people's attention and favor in numerous preparing methods, and this is because electrodip process prepares nano material and has the following advantages:
Figure 984092DEST_PATH_IMAGE001
is fit to preparation nano metal, alloy and matrix material;
Figure 701513DEST_PATH_IMAGE002
main impellent of galvanic deposit crystallization-----overpotential; Can artificially control; Whole deposition process realizes computer monitoring easily, difficult technically less, technology is flexible; Thermal stresses that high temperature introduces at material internal etc. has been avoided in
Figure 96722DEST_PATH_IMAGE003
normal temperature and pressure operation simultaneously.
Conventional electro-deposition techniques has dc electrodeposition, pulse electrodeposition and sprays galvanic deposit; These electro-deposition techniques all can obtain the nano material of specific dimensions size under the certain condition of control; But such electrodeposition process needs consumed power, and this must make that the material prepn cost is higher, and how cutting down the consumption of energy and then lowering the material prepn cost to become a research focus; Little electrolysis electrodeposit metals is not because deposition process needs consumed power can reach the purpose that reduces the material prepn cost; For a new route has been opened up in the preparation of nano material, this method adopts active anode particle and inert cathode granulometric composition micro-electrolysis stuffing, and the corrosion galvanic cell reaction takes place between the micro-electrolysis stuffing in deposit fluid; Make active anode dissolve; And treat that the metal refining ion-conductance is deposited on the inert cathode surface, finally accomplish the preparation of material, but the impellent of little electrolysis electro-deposition techniques reaction derives from the electric current and voltage that corrosion galvanic cell produces on the inert cathode surface; Receive metallic particles particle diameter that the restriction galvanic deposit of this electric current and voltage makes big (generally in micron level), do not reach the purpose of preparation nano material.
the big problem of material particle size to above little electrolysis electrodeposition technology for preparing; How through improve, improvement should technology or exploitation United Technologies; Under the prerequisite that keeps little electrolysis electro-deposition techniques advantage, effectively solve above-mentioned drawback problem, become an important techniques problem thereby make the nano material that meets the certain particle size requirement.
Summary of the invention
The present invention has overcome the deficiency and the shortcoming of little electrolysis electrodeposition technology for preparing material, provides a kind of to strengthen micro electrolysis tech prepared by electrodeposition preparation of nanomaterials.
For realizing the object of the invention; The present invention is when the little electrolysis prepared by electrodeposition of tradition metallic particles material; Through introducing an External Electrical Field on micro-electrolysis stuffing, promote the carrying out of corrosion galvanic cell reaction between micro-electrolysis stuffing, make galvanic cell react bigger galvanic cell voltage of violentization generation; And metallic particles high dispersingization, nanometer that this big voltage can impel galvanic deposit to obtain finally make nano material at filling surface.
Of the present invention a kind of to strengthen the method for micro electrolysis tech prepared by electrodeposition nano material; The concrete technical scheme that adopts is: the micro-electrolysis stuffing of active anode and inert cathode composition is placed the reinforcement micro-electrolysis reactor; Add the ratio of the 200-500ml deposit fluid aqueous solution in the 100g micro-electrolysis stuffing; In micro-electrolysis reactor, add the deposit fluid aqueous solution; After strengthening little electrolysis electrodeposit reaction through 5~120min under the external electric field strengthening effect of certain intensity; Metals ion is reduced into metal simple-substance at filling surface to be deposited in the deposit fluid, and to reach the purpose of control micro-electrolysis reaction process, different external electric field field intensity sizes are different to little electrolysis promotion, strengthening effect through control external electric field field intensity size; Galvanic deposit particulate homogenizing is also different with the nanometer degree, finally makes specific dimensions, becomes the nano material of the requirement that grades.
The deposit fluid aqueous solution described in the present invention comprises the metals ion of concentration 1~10000mg/L, the ionogen of concentration 1~100g/L, deposit fluid solution ph=1-9.
Ionogen of the present invention is Na 2SO 4, NaCl, K 2SO 4, a kind of among the KCl etc.
Metals ion of the present invention is one or more arbitrary combination in cupric ion, nickel ion, silver ions, platinum ion, the gold ion.
The external electric field of certain intensity of the present invention is a kind of electric field or several kinds of electric fields in DC electric field, alternating-electric field, the pulsed electrical field; External electric field is the electric field of strength of electric field >=0.1V/cm.
Micro-electrolysis stuffing of the present invention is the binary micro-electrolysis stuffing system of iron, aluminium, copper, carbon arbitrary combination formation; Or iron, copper, aluminium, zinc, carbon the arbitrary combination ternary or the above micro-electrolysis stuffing system of ternary that constitute, or iron, copper, aluminium, the alloy of zinc arbitrary combination and the micro-electrolysis stuffing system of carbon formation.
Ratio >=the 1:10 of anode and the quality of negative electrode in the micro-electrolysis stuffing system of binary micro-electrolysis stuffing system of the present invention or alloy and carbon, alloy is the commercial alloys material; By the active descending order of each composition, the mass ratio in the above micro-electrolysis stuffing system of ternary or ternary between each composition is equal >=1:10.
The form of micro-electrolysis stuffing of the present invention is a decentralized composite grain irregularity filler form, or mating type composite grain structured packing form.
The introducing of external electric field of the present invention mainly shows as the strengthening effect of little electrolytic metal electrodeposition process: little electrolytic metal electrodeposit reaction can impel the galvanic cell reaction to produce a bigger galvanic cell response voltage under the effect of extra electric field; Improve the reaction overpotential of metal electrodeposition; And then the formation of the required nucleus of promotion metal electric crystallization; The electrocrystallization process grows into the multinuclear transient growth again to the multinuclear continuous growth from monokaryon, and the abundant nucleus of filling surface helps metallic particles high dispersingization, the nanometer that electrocrystallization forms; Simultaneously, galvanic cell is reflected at and has changed GOLD FROM PLATING SOLUTION under the polarized action of extra electric field and belong to ionic chemistry potential energy, required activation energy when reducing metal electrodeposition, and then reduce the required overpotential of electrocrystallization nucleation, and nucleation rate increases, and makes the nucleus growth facilitation; And extra electric field can promote the migration of micro-electrolysis stuffing surface electronic, makes filling surface distribution of current homogenizing; Simultaneously can also promote GOLD FROM PLATING SOLUTION to belong to the migration of ion to filling surface, compression double electric layer reduces the electrostatic double layer current potential; Improve mass-transfer efficiency; Accelerate the carrying out of metal electrodeposition reaction, the metal electrodeposition reaction process has been strengthened in the introducing of external electric field, helps the preparation of metal nano material.
A kind of method with reinforcement micro electrolysis tech prepared by electrodeposition nano material of the present invention compared with prior art has the following advantages:
1, compare with the material of traditional micro-electrolysis method preparation, the material particle size of present method preparation is little, homogenizing, nanometer degree are high, and material particle size is controlled.
2, compare with conventional electrodip process, present method energy consumption is low, and the material prepn cost is low.
3, compare with other physico-chemical processes, present method has that technology is simple, easy and simple to handle, speed of response is fast, reaction conditions is gentle--characteristics such as-normal temperature and pressure.
Embodiment
Through embodiment the inventive method is done further to specify below, but protection scope of the present invention is not limited to said content.
Embodiment 1: this is to strengthen the method for micro electrolysis tech prepared by electrodeposition nano material, and concrete steps are following:
Preparation contains Ag +The deposit fluid aqueous solution of=1mg/L, NaCl=1g/L, pH=9; In the ratio that the 100g micro-electrolysis stuffing adds 500ml deposit fluid solution, in strengthening micro-electrolysis reactor, add the deposit fluid aqueous solution, strengthen and fill iron carbon decentralized composite grain filler in the micro-electrolysis reactor; Iron carbon mass ratio is 1:10; Through parallel-plate electrode control input AC strength of electric field be the External Electrical Field of 0.1V/cm on packing layer, the silver ions in the deposit fluid solution is reduced into silver-colored simple substance at the iron carbon surface and separates out, thereby reaches the purpose of preparation nano material; After strengthening little electrolysis electrodeposit reaction 50min, take out filler; The separation, the carbon granule after the separation that carry out the iron carbon granule successively clean postlyophilization through clear water, absolute ethyl alcohol, observe carbon surface deposited silver layer pattern by ESEM (SEM, the S3400N of Hitachi) at last; Find the deposition of silver particle at the carbon surface uniform distribution, silver-colored grain diameter is about 95nm.
Embodiment 2: this is to strengthen the method for micro electrolysis tech prepared by electrodeposition nano material, and concrete steps are following:
Preparation contains Cu 2+The deposit fluid aqueous solution of=100mg/L, KCl=20g/L, pH=1; In the ratio that the 100g micro-electrolysis stuffing adds the 300ml deposit fluid aqueous solution, in strengthening micro-electrolysis reactor, add the deposit fluid aqueous solution, strengthen and fill aluminum bronze carbon mating type filler in the micro-electrolysis reactor; Aluminum bronze carbon mass ratio is 2:1:1; Through parallel-plate electrode control input pulse strength of electric field be the External Electrical Field of 3V/cm on packing layer, the cupric ion in the deposit fluid aqueous solution is reduced into copper simple substance at the aluminum bronze carbon surface and separates out, thereby reaches the purpose of preparation nano material; After strengthening little electrolysis electrodeposit reaction 120min, take out filler; The separation, the carbon granule after the separation that carry out the aluminum bronze carbon granule successively clean postlyophilization through clear water, absolute ethyl alcohol, observe carbon surface copper settled layer pattern by ESEM (SEM, the S3400N of Hitachi) at last; Find the copper deposited particles at the carbon surface uniform distribution, the copper grain diameter is about 30nm.
Embodiment 3: this is to strengthen the method for micro electrolysis tech prepared by electrodeposition nano material, and concrete operations are following:
Preparation contains Pt 2+=10000mg/L, K 2SO 4The deposit fluid aqueous solution of=100g/L, pH=4; In the ratio that the 100g micro-electrolysis stuffing adds the 200ml deposit fluid aqueous solution, in strengthening micro-electrolysis reactor, add the deposit fluid aqueous solution, strengthen filling aluminum copper alloy mating type filler in the micro-electrolysis reactor; The aluminum bronze mass ratio is 2:1; Through parallel-plate electrode control input dc power intensity of field be the External Electrical Field of 6V/cm on packing layer, the platinum ion in the deposit fluid solution is reduced into platinum simple substance on the aluminum-copper alloy surface and separates out, thereby reaches the purpose of preparation nano material; After strengthening little electrolysis electrodeposit reaction 5min, take out filler; Alloy packing successively cleans postlyophilization through clear water, absolute ethyl alcohol, observes alloy surface platinum settled layer pattern by ESEM (SEM, the S3400N of Hitachi) at last; Find the platinum deposited particles at the alloy surface uniform distribution, the platinum grain particle diameter is about 50nm.
Embodiment 4: this is to strengthen the method for micro electrolysis tech prepared by electrodeposition nano material, and concrete steps are following:
Preparation contains Cu 2+=300mg/L, Ni 2+=100mg/L, Na 2SO 4The deposit fluid aqueous solution of=20g/L, pH=4; In the ratio that the 100g micro-electrolysis stuffing adds the 300ml deposit fluid aqueous solution, in strengthening micro-electrolysis reactor, add the deposit fluid aqueous solution, strengthen filling aluminum carbon decentralized granular filler in the micro-electrolysis reactor; Aluminium carbon mass ratio is 6:1; Through parallel-plate electrode control input dc power intensity of field be the External Electrical Field of 5V/cm on packing layer, the Cu in the deposit fluid solution, Ni ion are reduced into alloyed metal simple substance at aluminium carbon surface codeposition, thereby reach the purpose of preparation nano-copper-nickel alloy material; After strengthening little electrolysis electrodeposit reaction 60min, take out filler; The separation, the carbon granule after the separation that carry out the aluminium carbon granule successively clean postlyophilization through clear water, absolute ethyl alcohol, at last by ESEM (SEM, the S3400N of Hitachi; EDAX E-550) observes carbon surface alloy deposition layer pattern, finds the alloy deposition particle at the carbon surface uniform distribution, and the alloying pellet particle diameter is about 60nm, and the EDS results of elemental analyses shows that copper nickel mass ratio is about 0.35 in this alloy.

Claims (8)

1. one kind to strengthen the method for micro electrolysis tech prepared by electrodeposition nano material; It is characterized in that: the micro-electrolysis stuffing of active anode and inert cathode composition is placed the reinforcement micro-electrolysis reactor; Add the ratio of 200~500ml deposit fluid aqueous solution in the 100g micro-electrolysis stuffing; In micro-electrolysis reactor, add the deposit fluid aqueous solution, strengthen little electrolysis electrodeposit reaction through 5~120min under the electric field-enhanced outside effect after, make metal nano material.
2. according to claim 1 to strengthen micro electrolysis tech prepared by electrodeposition nano material method, it is characterized in that: the deposit fluid aqueous solution comprises the metals ion of concentration 1~10000mg/L, the ionogen of concentration 1~100g/L, deposit fluid solution ph=1~9.
3. according to claim 2 to strengthen micro electrolysis tech prepared by electrodeposition nano material method, it is characterized in that: ionogen is Na 2SO 4, NaCl, K 2SO 4, a kind of among the KCl.
4. according to claim 2 to strengthen micro electrolysis tech prepared by electrodeposition nano material method, it is characterized in that: metals ion be in cupric ion, nickel ion, silver ions, platinum ion, the gold ion one or more.
5. according to claim 1 to strengthen micro electrolysis tech prepared by electrodeposition nano material method, it is characterized in that: external electric field is one or more electric fields in DC electric field, alternating-electric field, the pulsed electrical field, external electric field intensity >=0.1V/cm.
6. according to claim 1 to strengthen micro electrolysis tech prepared by electrodeposition nano material method; It is characterized in that: micro-electrolysis stuffing is the binary micro-electrolysis stuffing system of iron, aluminium, copper, carbon arbitrary combination formation; Or iron, copper, aluminium, zinc, carbon the arbitrary combination ternary or the above micro-electrolysis stuffing system of ternary that constitute, or iron, copper, aluminium, the alloy of zinc arbitrary combination and the micro-electrolysis stuffing system of carbon formation.
7. according to claim 6 to strengthen micro electrolysis tech prepared by electrodeposition nano material method, it is characterized in that: the ratio >=1:10 of anode and the quality of negative electrode in the micro-electrolysis stuffing system of binary micro-electrolysis stuffing system or alloy and carbon; By the active descending order of each composition, the mass ratio in the above micro-electrolysis stuffing system of ternary or ternary between each composition is equal >=1:10.
8. according to claim 1 to strengthen micro electrolysis tech prepared by electrodeposition nano material method, it is characterized in that: the form of micro-electrolysis stuffing is a decentralized composite grain irregularity filler form, or mating type composite grain structured packing form.
CN201110344490.3A 2011-11-04 2011-11-04 A kind of with the method for pharmaceutics wastewater technology electrodeposited nanocrystalline material Expired - Fee Related CN102373491B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103359813A (en) * 2013-08-09 2013-10-23 中国矿业大学(北京) Water sterilizing system
CN105645525A (en) * 2016-01-13 2016-06-08 北方工程设计研究院有限公司 Catalytic microelectrolysis packing, as well as preparation method and application thereof

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* Cited by examiner, † Cited by third party
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CN201713362U (en) * 2010-04-13 2011-01-19 昆明理工大学 Plate type compound electrochemical device used for recovering heavy metal in wastewater

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201713362U (en) * 2010-04-13 2011-01-19 昆明理工大学 Plate type compound electrochemical device used for recovering heavy metal in wastewater

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103359813A (en) * 2013-08-09 2013-10-23 中国矿业大学(北京) Water sterilizing system
CN105645525A (en) * 2016-01-13 2016-06-08 北方工程设计研究院有限公司 Catalytic microelectrolysis packing, as well as preparation method and application thereof

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