CN114832827A - Preparation method of oriented heteroepitaxy composite catalyst by using magnetocaloric effect - Google Patents

Preparation method of oriented heteroepitaxy composite catalyst by using magnetocaloric effect Download PDF

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CN114832827A
CN114832827A CN202210539319.6A CN202210539319A CN114832827A CN 114832827 A CN114832827 A CN 114832827A CN 202210539319 A CN202210539319 A CN 202210539319A CN 114832827 A CN114832827 A CN 114832827A
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composite catalyst
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magnetocaloric
magnetic substrate
magnetocaloric effect
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CN114832827B (en
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李乃旭
唐铸
周建成
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Southeast University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/80—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with zinc, cadmium or mercury
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
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    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • B01J35/39—Photocatalytic properties
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    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/34—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation
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    • B01J37/342—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation of electric, magnetic or electromagnetic fields, e.g. for magnetic separation
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Abstract

The invention discloses a preparation method of a directional heteroepitaxy composite catalyst by utilizing a magnetocaloric effect. Belongs to the technical field of catalysts, and comprises the following steps: preparing a precursor solution by using zinc acetate dihydrate, potassium hydroxide and sodium citrate dihydrate; placing a magnetic substrate in a precursor solution, carrying out magnetocaloric reaction under the action of an alternating magnetic field, and then enabling crystals to directionally grow on the surface of the magnetic substrate through local high temperature generated on the surface of the magnetic substrate to generate a composite catalyst; taking out the composite catalyst for annealing; after the catalyst is subjected to a plurality of magnetocaloric crystallization and re-annealing circulation processes, the zinc oxide crystal can be effectively grown on magnetic substrates such as iron/cobalt/nickel base in a directional heteroepitaxy mode. The invention can obtain the heteroepitaxial composite catalyst with good crystallinity, orderly arrangement and directional growth. The method is easy to operate, has good repeatability, solves the problem of heteroepitaxial crystal growth on a magnetic substrate, and has certain industrial application prospect in the fields of photocatalysis, electrocatalysis, thermocatalysis and the like.

Description

Preparation method of oriented heteroepitaxy composite catalyst by using magnetocaloric effect
Technical Field
The invention belongs to the technical field of catalysts, relates to a preparation method of a directional heteroepitaxy composite catalyst by utilizing a magnetocaloric effect, and particularly relates to a preparation method for directionally and heteroepitaxy growing zinc oxide crystals on a certain magnetic substrate (iron/cobalt/nickel-based foam metal, a magnetic metal plate, large-size magnetic particles and the like) by utilizing cyclic crystallization of the magnetocaloric effect.
Background
In recent years, zinc oxide (ZnO) has become an excellent photocatalyst for metal oxides due to its advantages such as excellent optical properties of semiconductors, no toxicity, economy, and easy synthesis. In addition, the nano zinc oxide of the micro-particles plays an important role in the field of catalysis, but the nano zinc oxide can release free radicals, so that the oxidation pressure is increased, and proteins, esters and DNA in a body are damaged. Therefore, the zinc oxide is fixedly grown on a certain substrate, so that the defects can be effectively avoided.
With the continuous abundance of technical means, various zinc oxide-based composite catalysts are mature day by day, however, the traditional hydrothermal method, precipitation method, immersion method and other methods are difficult to effectively grow zinc oxide on another substrate in a directional heteroepitaxy manner, and have the defects of easy shedding, low composite efficiency, difficult recycling and the like.
According to the magnetocaloric effect generated by the magnetic substance in the alternating magnetic field, local high temperature can be generated on the surface of the magnetic substance, the crystallization process of crystals is accelerated, and the crystals grow on the surface of the magnetic substrate in an oriented mode.
Disclosure of Invention
In order to solve the problems, the invention provides a preparation method of a directional heteroepitaxy composite catalyst by utilizing a magnetocaloric effect, which synthesizes the directional heteroepitaxy composite catalyst by utilizing the magnetocaloric effect generated by a magnetic substrate in an alternating magnetic field and circulating crystallization through the magnetocaloric effect to ensure that crystals such as zinc oxide and the like are directionally heteroepitaxially grown on the surface of the magnetic substrate. By using the method, the heteroepitaxial composite catalyst with good crystallinity, orderly arrangement and directional growth can be obtained. The method is simple, easy to operate and good in repeatability, can be used for large-scale production, solves the problem of heteroepitaxial crystal growth on a magnetic substrate, and has certain industrial application prospect in the fields of photocatalysis, electrocatalysis, thermocatalysis and the like.
The technical scheme of the invention is as follows: the invention relates to a preparation method of a directional heteroepitaxy composite catalyst by utilizing a magnetocaloric effect, which utilizes the magnetocaloric effect generated by a magnetic substrate in an alternating magnetic field and then leads crystal to grow on the surface of the magnetic substrate in a directional heteroepitaxy manner through the cyclic crystallization of the magnetocaloric effect so as to synthesize the directional heteroepitaxy composite catalyst;
the preparation method comprises the following specific steps:
step (1), adding prepared zinc acetate dihydrate, potassium hydroxide and sodium citrate dihydrate into water as precursors to prepare a precursor solution,
step (2), preparing a magnetic substrate and carrying out pretreatment, then placing the magnetic substrate in a precursor solution, carrying out magnetocaloric reaction under the action of an alternating magnetic field, and then enabling crystals to directionally grow on the surface of the magnetic substrate through local high temperature generated on the surface of the magnetic substrate so as to generate a composite catalyst;
step (3), taking out the composite catalyst from the precursor solution and annealing;
and (4) circulating the steps for a plurality of times, and after repeatedly carrying out the magnetocaloric crystallization and re-annealing processes on the composite catalyst, directionally and heteroepitaxially growing the zinc oxide crystal on the magnetic substrate.
Further, in the step (1), the molar ratio of the zinc acetate dihydrate to the potassium hydroxide is 5: 1-2: 1; the molar ratio of the zinc acetate dihydrate to the sodium citrate dihydrate is 1: 1-1: 2; the water is deionized water.
Further, in the step (1), the reaction temperature of the prepared precursor solution is 65-85 ℃, and the reaction time is 2-8 h.
Further, in the step (2), the magnetic substrate is one of iron/cobalt/nickel-based foam metal, magnetic metal plate and large-sized magnetic particles.
Further, in the step (2), the frequency of the alternating magnetic field is 10 -1 ～10 5 Hz and the magnetic field intensity is 0.1-100 mT.
Further, in the step (2), the magnetocaloric reaction time is 0.5-8 h, and the reaction temperature is 80-240 ℃.
Further, in the step (3), the annealing temperature is 180-220 ℃, and the annealing time is 1-4 hours.
Further, in the step (4), the number of the circulating steps is 2-5.
The invention has the beneficial effects that: the invention is characterized in that: the method is simple, easy to operate and good in repeatability, can be used for large-scale production, solves the problem of heteroepitaxial crystal growth on a magnetic substrate, and effectively overcomes the defects that the nano zinc oxide is released into the environment to increase the oxidation pressure, so that the protein, ester and DNA in the body are damaged and the like by directional heteroepitaxial growth on the magnetic substrate; in addition, compared with the traditional hydrothermal method, precipitation method, immersion method and other methods, the method is difficult to effectively directionally heteroepitaxially grow the zinc oxide on another substrate, has the defects of easy falling, low recombination efficiency, difficult recycling and the like, generates local high temperature on the surface of the magnetic substrate through the magnetocaloric effect of a magnetic substance in an alternating magnetic field, accelerates the crystallization process of crystals, enables the zinc oxide to directionally grow on the surface of the magnetic substrate, and has quite considerable industrial application prospect in the fields of photocatalysis, electrocatalysis, thermocatalysis and the like through the efficient and directional heating mode.
Drawings
FIG. 1 is a flow chart of the operation of the present invention;
FIG. 2 is a scanning electron microscope image of a nickel foam @ zinc oxide directional heteroepitaxial composite catalyst prepared in example 1 of the present invention;
FIG. 3 is a scanning electron microscope image of the nickel plate @ zinc oxide oriented heteroepitaxial composite catalyst prepared in example 2 of the present invention.
Detailed Description
In order to more clearly illustrate the technical solution of the present invention, the following detailed description is made with reference to the accompanying drawings:
as shown in the figure, the invention utilizes the magnetocaloric effect generated by the magnetic substrate in the alternating magnetic field to make the crystals such as zinc oxide and the like directionally and heteroepitaxially grow on the surface of the magnetic substrate through the cyclic crystallization of the magnetocaloric effect, thereby synthesizing the directional heteroepitaxial composite catalyst; the specific operation steps are as follows:
1. adding zinc acetate dihydrate, potassium hydroxide and sodium citrate dihydrate into deionized water to prepare a precursor solution;
2. placing a magnetic substrate (foamed nickel) in a precursor solution, carrying out magnetocaloric reaction under the action of an alternating magnetic field, and then directionally growing crystals on the surface of the magnetic substrate through local high temperature generated on the surface of the magnetic substrate to generate a composite catalyst;
3. taking out the composite catalyst from the precursor solution and annealing;
4. and circulating the steps for a plurality of times, and after repeatedly carrying out the magneto-thermal crystallization re-annealing process on the catalyst, directionally and heteroepitaxially growing the zinc oxide crystals on the magnetic substrate.
The frequency of the alternating magnetic field used in the present invention is 10 -1 ～10 5 Hz and the magnetic field intensity is 0.1-100 mT.
The magnetic substrate used in the invention is iron/cobalt/nickel-based foam metal, magnetic metal plate, large-size magnetic particles and the like.
The reaction temperature of the precursor solution used in the invention is 65-85 ℃, and the reaction time is 2-8 h.
The molar ratio of zinc acetate dihydrate to sodium citrate dihydrate used in the invention is 1: 1-1: 2, the molar ratio of zinc acetate dihydrate to potassium hydroxide is 1: 1-1: 2.
the magnetocaloric reaction time is 0.5-8 h, and the reaction temperature is 80-240 ℃.
The annealing temperature used in the invention is 180-220 ℃, and the annealing time is 1-4 h.
The number of the magnetic thermal crystallization re-annealing circulating steps used in the invention is 2-5.
Example 1:
adding 1.1g of zinc acetate dihydrate, 0.28g of potassium hydroxide and 1.48g of sodium citrate dihydrate into a clean 100ml beaker, adding 70ml of deionized water to prepare a precursor solution, and stirring and reacting for 4 hours at 70 ℃; pretreating foamed nickel with the specification of 3cm multiplied by 3cm, removing impurities on the surface of the foamed nickel by using 1mol/L HCI solution, and then washing and drying for later use; then placing the processed foam nickel in a precursor solution, reacting for 6 hours under the action of an alternating magnetic field through a magnetocaloric effect, and regulating the magnetic field strength to enable the reaction temperature to be 180 ℃; then, taking out the foam nickel-based catalyst, washing, drying and annealing at 200 ℃; and (3) after the step of the magnetocaloric reaction recrystallization is circulated for 3 times, washing with deionized water and drying to obtain the foamed nickel @ zinc oxide directional heteroepitaxy composite catalyst.
Example 2:
adding 0.55g of zinc acetate dihydrate, 0.12g of potassium hydroxide and 0.74g of sodium citrate dihydrate into a clean 100ml beaker, adding 60ml of deionized water to prepare a precursor solution, and stirring and reacting for 3 hours at 75 ℃; pretreating a nickel plate with the specification of 3cm multiplied by 3cm, removing impurities on the surface of the foamed nickel by using 1mol/L HCI solution, and then washing and drying for later use; then placing the treated nickel plate in a precursor solution, reacting for 4 hours under the action of an alternating magnetic field through a magnetocaloric effect, and regulating the magnetic field strength to ensure that the reaction temperature is 120 ℃; then, taking out the nickel-based catalyst, washing, drying and annealing at 220 ℃; and (4) after the step of magnetic induced thermal reaction recrystallization is circulated for 4 times, washing and drying by using deionized water to obtain the nickel plate @ zinc oxide directional heteroepitaxy composite catalyst.
Example 3:
adding 0.825g of zinc acetate dihydrate, 0.33g of potassium hydroxide and 1.48g of sodium citrate dihydrate into a clean 100ml beaker, adding 70ml of deionized water to prepare a precursor solution, and stirring and reacting for 4 hours at 70 ℃; pretreating foamed iron-nickel with the specification of 3cm multiplied by 3cm, removing impurities on the surface of the foamed iron-nickel by using 1mol/L HCI solution, and then washing and drying for later use; then placing the processed foam iron-nickel in a precursor solution, reacting for 6 hours under the action of an alternating magnetic field through a magnetocaloric effect, and regulating the magnetic field strength to ensure that the reaction temperature is 200 ℃; then, taking out the foam nickel-based catalyst, washing, drying and annealing at 240 ℃; and (3) after the step of the magnetocaloric reaction recrystallization is circulated for 3 times, washing with deionized water and drying to obtain the foamed iron-nickel @ zinc oxide directional heteroepitaxy composite catalyst.
Example 4:
adding 0.55g of zinc acetate dihydrate, 0.14g of potassium hydroxide and 1.11g of sodium citrate dihydrate into a clean 100ml beaker, adding 70ml of deionized water to prepare a precursor solution, and stirring and reacting for 4 hours at 80 ℃; then placing ferroferric oxide particles in a precursor solution, stirring and reacting for 6 hours under the action of an alternating magnetic field through a magnetocaloric effect, and regulating the magnetic field strength to enable the reaction temperature to be 180 ℃; then, taking out the foam nickel-based catalyst, filtering, washing, drying, and annealing at 200 ℃; and (3) after the magnetocaloric reaction recrystallization step is circulated for 4 times, filtering, washing and drying by using deionized water to obtain the ferroferric oxide @ zinc oxide oriented heteroepitaxy composite catalyst.
Example 5:
adding 1.1g of zinc acetate dihydrate, 0.42g of potassium hydroxide and 2.22g of sodium citrate dihydrate into a clean 100ml beaker, adding 70ml of deionized water to prepare a precursor solution, and stirring and reacting for 4 hours at 75 ℃; then placing the nickel oxide particles in a precursor solution, reacting for 6 hours under the action of an alternating magnetic field through a magnetocaloric effect, and regulating the magnetic field strength to enable the reaction temperature to be 180 ℃; then, taking out the nickel oxide-based catalyst, filtering, washing, drying, and annealing at 200 ℃; and (3) after the step of the magnetocaloric reaction recrystallization is circulated for 5 times, filtering, washing and drying the product by using deionized water to obtain the nickel oxide @ zinc oxide oriented heteroepitaxy composite catalyst.
Example 6:
adding 1.1g of zinc acetate dihydrate, 0.28g of potassium hydroxide and 1.48g of sodium citrate dihydrate into a clean 100ml beaker, adding 70ml of deionized water to prepare a precursor solution, and stirring and reacting for 4 hours at 70 ℃; then placing cobaltosic oxide particles in a precursor solution, reacting for 6 hours under the action of an alternating magnetic field through a magnetocaloric effect, and regulating the magnetic field strength to ensure that the reaction temperature is 240 ℃; then, taking out the cobaltosic oxide-based catalyst, filtering, washing, drying, and annealing at 200 ℃; and (3) after the step of magnetically induced thermal reaction recrystallization is circulated for 5 times, filtering, washing and drying by using deionized water to obtain the cobaltosic oxide @ zinc oxide oriented heteroepitaxy composite catalyst.
Finally, it should be understood that the embodiments described herein are merely illustrative of the principles of embodiments of the invention; other variations are possible within the scope of the invention; thus, by way of example, and not limitation, alternative configurations of embodiments of the invention may be considered consistent with the teachings of the present invention; accordingly, the embodiments of the invention are not limited to the embodiments explicitly described and depicted.

Claims (8)

1. A preparation method of a directional heteroepitaxy composite catalyst by utilizing a magnetocaloric effect is characterized in that a magnetocaloric effect generated by a magnetic substrate in an alternating magnetic field is utilized, and then crystal directional heteroepitaxy grows on the surface of the magnetic substrate through magnetocaloric effect cyclic crystallization, so that the directional heteroepitaxy composite catalyst is synthesized; the preparation method comprises the following specific steps:
step (1), adding prepared zinc acetate dihydrate, potassium hydroxide and sodium citrate dihydrate into water as precursors to prepare a precursor solution,
step (2), preparing a magnetic substrate and carrying out pretreatment, then placing the magnetic substrate in a precursor solution, carrying out magnetocaloric reaction under the action of an alternating magnetic field, and then enabling crystals to directionally grow on the surface of the magnetic substrate through local high temperature generated on the surface of the magnetic substrate so as to generate a composite catalyst;
step (3), taking out the composite catalyst from the precursor solution and annealing;
and (4) circulating the steps for a plurality of times, and after repeatedly carrying out the magnetocaloric crystallization and re-annealing processes on the composite catalyst, directionally and heteroepitaxially growing the zinc oxide crystal on the magnetic substrate.
2. A method for preparing a directional heteroepitaxial composite catalyst by using a magnetocaloric effect according to claim 1, wherein in the step (1), the molar ratio of the zinc acetate dihydrate to the potassium hydroxide is 5: 1-2: 1; the molar ratio of the zinc acetate dihydrate to the sodium citrate dihydrate is 1: 1-1: 2; the water is deionized water.
3. The method for preparing a directional heteroepitaxy composite catalyst by using the magnetocaloric effect according to claim 1, wherein in the step (1), the reaction temperature of the prepared precursor solution is 65-85 ℃ and the reaction time is 2-8 h.
4. A method for preparing a directional heteroepitaxial composite catalyst using magnetocaloric effect according to claim 1, wherein in step (2), the magnetic substrate is one of fe/co/ni-based foam metal, magnetic metal plate and large-sized magnetic particles.
5. A method for preparing a directional heteroepitaxial composite catalyst using magnetocaloric effect according to claim 1, wherein in step (2), the frequency of the alternating magnetic field is 10 -1 ～10 5 Hz and the magnetic field intensity is 0.1-100 mT.
6. The method for preparing a directional heteroepitaxial composite catalyst by using the magnetocaloric effect according to claim 1, wherein in the step (2), the magnetocaloric reaction time is 0.5-8 h, and the reaction temperature is 80-240 ℃.
7. The method for preparing a directional heteroepitaxial composite catalyst by using the magnetocaloric effect according to claim 1, wherein in the step (3), the annealing temperature is 180-220 ℃ and the annealing time is 1-4 h.
8. The method for preparing a directional heteroepitaxial composite catalyst by using the magnetocaloric effect according to claim 1, wherein in the step (4), the number of the cycling steps is 2-5.
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014136456A1 (en) * 2013-03-07 2014-09-12 国立大学法人東京工業大学 Complex-heating method and device, catalytic reaction device, catalytic unit, and manufacturing method therefor
CN110075854A (en) * 2019-05-06 2019-08-02 东南大学 A kind of preparation of integral catalyzer and its application method
CN110230042A (en) * 2019-06-13 2019-09-13 大连理工大学 A kind of magnetic photonic crystal micro-sphere material and preparation method thereof
CN110436529A (en) * 2019-09-08 2019-11-12 兰州大学第一医院 A kind of Fe can be used for magnetic thermotherapy3O4The preparation method of nano-bar material
CN111617771A (en) * 2020-05-20 2020-09-04 东南大学 Preparation method of composite metal material catalyst and application of composite metal material catalyst in preparation of 5-HMF
CN113258003A (en) * 2021-05-28 2021-08-13 电子科技大学 Organic photovoltaic device preparation process based on metal nanoparticle magnetic thermal effect annealing process
CN113985325A (en) * 2021-09-16 2022-01-28 彭彦莉 Alternating magnetic field detection device based on magnetocaloric effect

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014136456A1 (en) * 2013-03-07 2014-09-12 国立大学法人東京工業大学 Complex-heating method and device, catalytic reaction device, catalytic unit, and manufacturing method therefor
CN110075854A (en) * 2019-05-06 2019-08-02 东南大学 A kind of preparation of integral catalyzer and its application method
CN110230042A (en) * 2019-06-13 2019-09-13 大连理工大学 A kind of magnetic photonic crystal micro-sphere material and preparation method thereof
CN110436529A (en) * 2019-09-08 2019-11-12 兰州大学第一医院 A kind of Fe can be used for magnetic thermotherapy3O4The preparation method of nano-bar material
CN111617771A (en) * 2020-05-20 2020-09-04 东南大学 Preparation method of composite metal material catalyst and application of composite metal material catalyst in preparation of 5-HMF
CN113258003A (en) * 2021-05-28 2021-08-13 电子科技大学 Organic photovoltaic device preparation process based on metal nanoparticle magnetic thermal effect annealing process
CN113985325A (en) * 2021-09-16 2022-01-28 彭彦莉 Alternating magnetic field detection device based on magnetocaloric effect

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