CN106732625A - A kind of Copper-cladding Aluminum Bar cerium oxide nano materials of cyclic structure and its preparation and application - Google Patents

A kind of Copper-cladding Aluminum Bar cerium oxide nano materials of cyclic structure and its preparation and application Download PDF

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CN106732625A
CN106732625A CN201611132099.6A CN201611132099A CN106732625A CN 106732625 A CN106732625 A CN 106732625A CN 201611132099 A CN201611132099 A CN 201611132099A CN 106732625 A CN106732625 A CN 106732625A
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copper
cerium oxide
aluminum bar
oxide nano
cyclic structure
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CN106732625B (en
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杨卫春
柴立元
李超芳
刘恢
王海鹰
唐崇俭
闵小波
杨志辉
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Central South University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/76Catalysts 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
    • B01J23/83Catalysts 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 rare earths or actinides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86Catalytic processes
    • B01D53/8665Removing heavy metals or compounds thereof, e.g. mercury
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/40Catalysts, in general, characterised by their form or physical properties characterised by dimensions, e.g. grain size

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  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
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  • General Chemical & Material Sciences (AREA)
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  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

The invention discloses a kind of Copper-cladding Aluminum Bar cerium oxide nano materials of cyclic structure and its preparation and the application in terms of demercuration.Comprise the following steps:With a certain proportion of cerous nitrate and mantoquita as raw material, using urea as alkali source, using polyvinylpyrrolidone as surfactant, mixed hydrolysis react, the mixture for obtaining is after hydro-thermal constant temperature is preserved and washing is dried, again by calcining, pattern rule, size uniformity, the Copper-cladding Aluminum Bar cerium oxide of complete ring-type nanostructured are obtained.Copper-cladding Aluminum Bar cerium oxide nano materials structure prepared by the present invention is novel, and raw material is simple and easy to get, and operation is simple, course of reaction cleaning, non-secondary pollution.The removing of mercury in air is applied to, method is simple, and demercuration effect is good, concentration for the treatment of is 75 μ g/m3Hg0Steam, in the case where 4% Oxygen Condition is passed through, demercuration rate can reach more than 98%, good stability.

Description

A kind of Copper-cladding Aluminum Bar cerium oxide nano materials of cyclic structure and its preparation and application
Technical field
The present invention relates to the field of nano material preparation technology, and in particular to a kind of Copper-cladding Aluminum Bar cerium oxide of cyclic structure is received Rice material and its preparation and its application in terms of demercuration.
Background technology
Cerium oxide is a kind of extremely wide rare earth oxide of purposes, with can rapid translating Ce3+/Ce4+, superior store The quick Lacking oxygen diffusivity of oxygen function, high temperature, is widely used in catalytic field.Controlled in nano-scale when by scantling When, the physical and chemical performance of uniqueness is showed, be conducive to lifting its catalysis activity.And the cerium oxide nano of different-shape structure The catalytic performance of material there is also very big difference.
In recent years, research obtains the cerium oxide nano materials of portion of monocrystalline structure, bar-shaped, real compared to existing at present The cerium oxide of the various patterns such as bulbus cordis shape, threadiness, the nano material of monocrystalline cyclic structure is in specific surface area and permeability Etc. aspect have superior function, had a good application prospect in catalytic field.
And CeO2Adulterate after other exogenous metal ions, the twist distortion of the lattice structure that ion size difference causes, Or ionic valence condition balance is broken in the change of Doped ions valence state, these can result in lattice occur more lattice defects and Lacking oxygen, so as to further increase oxygen storage capacity and redox ability, and then improves catalysis activity.Therefore new list is researched and developed The brilliant metal-doped cerium oxide nano materials of cyclic structure will have good application prospect.
The content of the invention
Copper-cladding Aluminum Bar cerium oxide nano materials it is an object of the invention to provide a kind of cyclic structure and preparation method thereof and Using.Preparation method of the present invention is simple, short preparation period, cleaning, reproducible.The cerium oxide nano materials of preparation, structure is new Grain husk, catalytic capability is stronger, and demercuration effect is good, easy to use using simple.
The purpose of the present invention is achieved in the following ways.
A kind of preparation method of the Copper-cladding Aluminum Bar cerium oxide nano materials of cyclic structure, comprises the following steps:By cerous nitrate, copper After salt, polyvinylpyrrolidone, urea mixing are through hydro-thermal reaction, then by calcining, obtain the Copper-cladding Aluminum Bar cerium oxide of cyclic structure Nano material.
The preparation method of the Copper-cladding Aluminum Bar cerium oxide nano materials of described cyclic structure, mantoquita includes copper chloride, copper nitrate In one or two.
The mol ratio of the preparation method of the Copper-cladding Aluminum Bar cerium oxide nano materials of described cyclic structure, cerium and copper:1:0.01- 0.1。
The preparation method of the Copper-cladding Aluminum Bar cerium oxide nano materials of described cyclic structure, the cerous nitrate for being used, polyethylene The mass ratio that pyrrolidones and urea are added is:1:(0.2~1):(2~6).
The preparation method of the Copper-cladding Aluminum Bar cerium oxide nano materials of described cyclic structure, 120 DEG C -180 of hydrothermal temperature DEG C, time 10-12 hours.
The preparation method of the Copper-cladding Aluminum Bar cerium oxide nano materials of described cyclic structure, 300-600 DEG C of calcining heat, calcining 2-4h。
The preparation method of the Copper-cladding Aluminum Bar cerium oxide nano materials of described cyclic structure, by cerous nitrate and mantoquita and polyethylene Pyrrolidones is added in deionized water, magnetic agitation 10-40 minutes, adds a certain amount of urea mixed hydrolysis reaction 15-60 Minute, the mixture for obtaining carries out hydro-thermal reaction again.
The preparation method of the Copper-cladding Aluminum Bar cerium oxide nano materials of described cyclic structure, the product washing three after hydro-thermal reaction Secondary, ethanol is washed twice, after suction filtration, by its 60 DEG C of dryings more than 8 hours, then is calcined.
The Copper-cladding Aluminum Bar cerium oxide nano materials of above-mentioned cyclic structure are used to be catalyzed demercuration.Specifically method is:
Reaction temperature is 150 DEG C -250 DEG C, gaseous state Hg0Concentration be 50-100 μ g/m3, carrier gas is N2, air speed is 150000h-1, the material containing 4%O2Demercuration is carried out under the conditions of following carrier gas.
It is an advantage of the invention that:
(1) the invention provides a kind of cyclic structure Copper-cladding Aluminum Bar cerium oxide nano materials preparation method, preparation process Easy clean is controllable, and raw material is simple and easy to get, meanwhile, your gold such as Au, Pd contained in current many preferable demercuration catalysts of effect Category, it is relatively costly, and preparing raw material price of the invention is relatively low.
(2) same procedure is used, but does not mix the pure zirconia cerium that copper prepares and compared, the Copper-cladding Aluminum Bar oxidation that the present invention is provided Cerium is presented the ring-type nanostructured of pattern rule, material is had more spaces, is conducive to increasing specific surface area, and lifting is lived Property, and material C e3+/Ce4+Conversion capability lifted, while Surface Oxygen vacancy concentration increase, catalytic performance enhancing.
(3) nano material of the Copper-cladding Aluminum Bar cerium oxide of ring-type of the present invention, preferably, concentration for the treatment of is 75 μ g/m to demercuration effect3 Hg0Steam, after 4% oxygen is passed through, demercuration rate can reach 98.5%, and general catalyst often also needs to be passed through HCl, and pure zirconia cerium is under the same conditions, demercuration rate is only 17%.
Brief description of the drawings
Fig. 1 is the TEM figures of the Copper-cladding Aluminum Bar cerium oxide nano materials of the cyclic structure prepared by the inventive method;
Fig. 2 be using same procedure but do not mix the pure zirconia cerium that copper is prepared TEM figure;
Fig. 3 is the XRD spectrum of the Copper-cladding Aluminum Bar cerium oxide nano materials of the cyclic structure prepared by the inventive method.
Specific embodiment
The present invention is illustrated with specific embodiment below to be described further, but it is necessary to note that following examples are only used Further illustrated in the content of the invention, limitation of the present invention can't be formed.
Embodiment 1
By 0.143g cerous nitrates, in 0.068g copper chlorides and 0.5g polyvinylpyrrolidones addition 30mL deionized waters, magnetic Power stirring 10min is completely dissolved until it, then 2.196g urea is added in reaction solution, stirring reaction 30min, will be mixed Compound is added in hydrothermal reaction kettle.Reactor is put into baking oven, 150 DEG C of constant temperature 10h.Then gained mixed solution is spent Ion water washing three times, ethanol is washed twice, and 10h is dried in 60 DEG C of baking ovens, finally 500 DEG C of calcining 4h in Muffle furnace, you can Obtain the ring-type nano material of Copper-cladding Aluminum Bar cerium oxide.
Embodiment 2
By 0.143g cerous nitrates, in 0.097 copper nitrate and 0.5g polyvinylpyrrolidones addition 30mL deionized waters, magnetic force Stirring 10min is completely dissolved until it, and then 2.196g urea is added in reaction solution, and stirring reaction 30min will mix Thing is added in hydrothermal reaction kettle.Reactor is put into baking oven, 150 DEG C of constant temperature 10h.Then by gained mixed solution spend from Sub- water washing three times, ethanol is washed twice, and 10h is dried in 60 DEG C of baking ovens, finally 500 DEG C of calcining 4h in Muffle furnace, you can To the ring-type nano material of Copper-cladding Aluminum Bar cerium oxide.
Embodiment 3
Under conditions of 200 DEG C, respectively the material prepared by embodiment 1 as catalyst treatment concentration be 75 μ g/m3's Hg0Steam, air speed is 150000h-1, in N2Under the conditions of as carrier gas, after 4% oxygen is passed through, demercuration effect can reach More than 98.5%.

Claims (10)

1. the preparation method of the Copper-cladding Aluminum Bar cerium oxide nano materials of a kind of cyclic structure, it is characterised in that comprise the following steps:Will After cerous nitrate, mantoquita, polyvinylpyrrolidone, urea mixing are through hydro-thermal reaction, then by calcining, the copper for obtaining cyclic structure is mixed Miscellaneous cerium oxide nano materials.
2. the preparation method of the Copper-cladding Aluminum Bar cerium oxide nano materials of cyclic structure according to claim 1, it is characterised in that Mantoquita include copper chloride, copper nitrate in one or two.
3. the preparation method of the Copper-cladding Aluminum Bar cerium oxide nano materials of cyclic structure according to claim 1, it is characterised in that The mol ratio of cerium and copper:1:(0.01~0.1).
4. the preparation method of the Copper-cladding Aluminum Bar cerium oxide nano materials of cyclic structure according to claim 1, it is characterised in that The mass ratio that cerous nitrate, polyvinylpyrrolidone and the urea for being used are added for:1:(0.2~1):(2~6).
5. the preparation method of the Copper-cladding Aluminum Bar cerium oxide nano materials of cyclic structure according to claim 1, it is characterised in that 120 DEG C -180 DEG C, time 10-12 hours of hydrothermal temperature.
6. the preparation method of the Copper-cladding Aluminum Bar cerium oxide nano materials of cyclic structure according to claim 1, it is characterised in that 300-600 DEG C of calcining heat, calcines 2-4h.
7. the preparation method of the Copper-cladding Aluminum Bar cerium oxide nano materials of cyclic structure according to claim 1, it is characterised in that Cerous nitrate and mantoquita and polyvinylpyrrolidone are added in deionized water, magnetic agitation 10-40 minutes, added a certain amount of Urea mixed hydrolysis react 15-60 minutes, and the mixture for obtaining carries out hydro-thermal reaction again.
8. the preparation method of the Copper-cladding Aluminum Bar cerium oxide nano materials of cyclic structure according to claim 1, it is characterised in that Product after hydro-thermal reaction is washed three times, and ethanol is washed twice, after suction filtration, by its 60 DEG C of dryings more than 8 hours, then is calcined.
9. the Copper-cladding Aluminum Bar cerium oxide nano materials of the cyclic structure that the method described in any one of claim 1-8 is prepared from.
10. the Copper-cladding Aluminum Bar cerium oxide nano materials of the cyclic structure described in claim 9 are used to be catalyzed demercuration.
CN201611132099.6A 2016-12-09 2016-12-09 A kind of Copper-cladding Aluminum Bar cerium oxide nano materials of cyclic structure and its preparation and application Active CN106732625B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107754779A (en) * 2017-10-24 2018-03-06 山东师范大学 Transient metal doped cerium-based composite oxides multiaspect body catalyst and preparation method
CN108948120A (en) * 2018-07-07 2018-12-07 张正光 A kind of preparation method of Abiraterone acetate intermediate
CN110508288A (en) * 2019-09-24 2019-11-29 福州大学 A kind of preparation and its application of the rodlike Copper-cladding Aluminum Bar ceria with porous structure

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107754779A (en) * 2017-10-24 2018-03-06 山东师范大学 Transient metal doped cerium-based composite oxides multiaspect body catalyst and preparation method
CN108948120A (en) * 2018-07-07 2018-12-07 张正光 A kind of preparation method of Abiraterone acetate intermediate
CN110508288A (en) * 2019-09-24 2019-11-29 福州大学 A kind of preparation and its application of the rodlike Copper-cladding Aluminum Bar ceria with porous structure

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