CN106563457A - Preparation method of copper oxide surface composite Ce oxidation layer material - Google Patents
Preparation method of copper oxide surface composite Ce oxidation layer material Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000002131 composite material Substances 0.000 title abstract description 12
- 230000003647 oxidation Effects 0.000 title abstract description 7
- 238000007254 oxidation reaction Methods 0.000 title abstract description 7
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 title abstract 5
- 239000005751 Copper oxide Substances 0.000 title abstract 3
- 229910000431 copper oxide Inorganic materials 0.000 title abstract 3
- BERDEBHAJNAUOM-UHFFFAOYSA-N copper(I) oxide Inorganic materials [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 claims abstract description 31
- KRFJLUBVMFXRPN-UHFFFAOYSA-N cuprous oxide Chemical compound [O-2].[Cu+].[Cu+] KRFJLUBVMFXRPN-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910003320 CeOx Inorganic materials 0.000 claims abstract description 29
- 150000001875 compounds Chemical class 0.000 claims abstract description 20
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000011159 matrix material Substances 0.000 claims abstract description 13
- 230000006798 recombination Effects 0.000 claims description 23
- 238000005215 recombination Methods 0.000 claims description 23
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 10
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 10
- BTANRVKWQNVYAZ-UHFFFAOYSA-N butan-2-ol Chemical compound CCC(C)O BTANRVKWQNVYAZ-UHFFFAOYSA-N 0.000 claims description 9
- 239000006185 dispersion Substances 0.000 claims description 8
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 4
- 239000002244 precipitate Substances 0.000 claims description 3
- 239000003643 water by type Substances 0.000 claims description 3
- 238000005119 centrifugation Methods 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 10
- 238000006073 displacement reaction Methods 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 239000011259 mixed solution Substances 0.000 abstract description 3
- 238000011160 research Methods 0.000 abstract description 3
- 238000011161 development Methods 0.000 abstract description 2
- 230000003993 interaction Effects 0.000 abstract description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 15
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 14
- 239000008187 granular material Substances 0.000 description 8
- 230000009467 reduction Effects 0.000 description 6
- 239000002105 nanoparticle Substances 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 230000003595 spectral effect Effects 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 229910052684 Cerium Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 241000894007 species Species 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- 229910000667 (NH4)2Ce(NO3)6 Inorganic materials 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 238000000026 X-ray photoelectron spectrum Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 239000012495 reaction gas Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000010189 synthetic method Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- XUAFEHRGKYJQCQ-UHFFFAOYSA-N [S].[O-][N+]#N Chemical class [S].[O-][N+]#N XUAFEHRGKYJQCQ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000012761 high-performance material Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002052 molecular layer Substances 0.000 description 1
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- 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
- B01J23/83—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 rare earths or actinides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8628—Processes characterised by a specific catalyst
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
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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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
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Abstract
The invention provides a preparation method of a copper oxide surface composite Ce oxidation layer material. The preparation method comprises the following steps: in water, an alcohol, or a water-alcohol mixed solution, redox displacement is performed between a soluble Ce source compound containing a +4-valent oxidation-state Ce element (Ce(IV)) and the surface of a Cu2O matrix, so that a novel method for compositing a Ce oxidation thin layer (Ce(III) and Ce(IV) coexist and are marked as CeOx) on the Cu2O surface can be obtained; and a sample is subjected to heat treatment, so that a CuO surface composite CeOx material can be further obtained. The preparation method has the characteristics that CeOx can be highly dispersedly, uniformly and closely composited on the Cu2O or CuO material surface as the molecular-scale thin layer; the structure and the performance of the copper oxide surface composite Ce oxidation layer material is mainly determined by the chemical mole ratio of the Ce element and Cu2O, and the series control is easy to achieve; the ratio range involved in the preparation method is 0.02-2.0; the oxide composite structure or interface interaction research and application fields are concerned; and the preparation method can provide a reference for the development of a high-temperature material.
Description
Technical field
The present invention relates to a kind of preparation method of Cu oxide surface recombination cerium oxide material, belongs to oxide solid-state table
The controlledly synthesis of interface microcosmic composite construction and associated materials application.
Background technology
Relative to pure component material, solid-oxide multicomponent composite materials have more excellent physical and chemical performance, because
And receive much attention at many important applied fields such as aspect such as opto-electronic conversion, sensor, catalysis.For these applications, material
Its surface and interface structure can be depended on, generally the yardstick of this surface and interface structure between solid-state material surface 1-3 layers molecule or
In atomic layer level thickness category, therefore it is that microcosmic chi is realized to it that one of basic point of effective optimization is carried out to this kind of material property
Surface and interface structure regulating synthesis in degree category.However, preparing two class main methods of oxide composite at present in this side
All there is obvious defect in face：One class is to be supported other component depositions thereon based on a kind of component, and defect is deposition
The uncontrollability of process causes to support the yardstick of component and their distribution situations on matrix are difficult control, is particularly difficult
They in matrix surface, that is, are difficult to form effective table on a microscopic scale with less than the uniform high dispersive of 3 layers of molecular layers thick
Interfacial oxide composite construction；Another kind of be to carry out solidifying i.e. body phase simultaneously by various ingredients being combined, and this kind of method is asked at all
Topic is and is not concerned with that the recombination process between component is controlled in the micro-scale category of solid surface and interface, therefore is also difficult to reality
The regulation and control that become more meticulous of existing material list interfacial structure and performance.For the problems referred to above, the present invention is right with Cu-Ce composite oxides
As proposing and having put into practice one kind in Cu oxide（Cu2O or CuO）Surface direct construction cerium oxide layer（Ce（III）And Ce
（IV）Coexist, be designated as CeOx）The new method of composite, specially with Cu that surface is not oxidized2Based on O materials, directly draw
Enter appropriate compound such as (NH containing+4 valency oxidation state Ce elements4)2Ce(NO3)6, in water, alcohol or water-alcohol mixed solution, lead to
Cross Cu2O surfaces and Ce（IV）Oxidoreduction displacement reaction, i.e. Cu2O surface moleculars are oxidized to Cu2+While abjection,
Cu2Ce on O matrixes（IV）It is reduced and is deposited as CeOx, it is derived from Cu2O surface recombination CeOxLayer material, on this basis,
Heat treatment is carried out to sample by Cu2O matrixes converted in-situ is CuO, you can further obtain the compound CeO of CuO surfaces high dispersivexMaterial
Material.The method feature is：Preparation process is substantially one to be occurred in Cu2The heterogeneous oxidation reduction displacement of O matrix surfaces is anti-
Should, only Cu2O matrix surfaces molecular layer can be used as by Ce（IV）Reduction is deposited as CeOxReaction and cover interface, thus from original
CeO is ensure that in reasonxCan with molecular scale thin layer high degree of dispersion, it is uniform, be closely compound in a nanometer Cu2O（Or subsequent heat treatment is spread out
Raw CuO）Material surface；CeOxDispersing morphology and sample overall performance mainly by the Ce elements and Cu in preparation system2O
Chemical mol ratio determines that the proportion that the application is related to is 0.02-2.0, and the performance of thus easily achieving sample regulates and controls, such as institute
Prepare sample Ce:Cu2O is controlled to 0.05-0.8（Ce and Cu when prepared by correspondence2The chemical mol ratio of O is 0.1-1.6）During scope,
Under the atmosphere containing sulfur dioxide, the high conversion reduction removing of nitrogen oxides high selectivity can be realized between 513-613K, that is, be had
Standby good resistant to sulfur denitration performance.To focusing on solid-state Ce compound disperse properties and Cu-Ce oxide composite structures or interface
The research of interaction and application, this method is expected to provide easy effectively new ginseng for the development of related high performance material
Examine.
The content of the invention
The purpose of the present invention is not enough for prior art, there is provided a kind of Cu oxide surface recombination cerium oxide material
Preparation method, proposes and has put into practice with the not oxidized Cu in surface2O granules（Pattern, size are not limited）Based on, by its surface
Molecule can with containing+4 valency oxidation state Ce（IV）The compound such as (NH of element4)2Ce(NO3)6Between to carry out oxidoreduction displacement anti-
Should, by Ce elements and Cu in adjustment and control system2O chemistry mol ratios, realize the cerium oxide layer after displacement（Ce（III）And Ce
（IV）Coexist, be designated as CeOx）Can with molecular scale thin layer high dispersive, it is uniform, be closely compound in Cu2O material surfaces obtain Cu2O
Surface recombination CeOxThe new method of layer material, further heat treatment is carried out to sample by Cu2O matrixes converted in-situ is CuO, i.e.,
The compound CeO of CuO surfaces high dispersive can be obtainedxMaterial.This method is for focusing on solid-state Ce compound disperse properties and Cu-Ce
Oxide interface mutually or compound action research and application, be a kind of important control of material synthesized reference.
Preparation method of the present invention includes：
（1）Synthetic system is consisted of：
The Cu of fresh preparation2O materials（Ensure that material surface is not oxidized for CuO）：Pattern is not limited, cube, octahedron, ball
Body, porous sphere, random body all may be used；Size is not limited, from nanometer to centimetre all may be used；Consumption is weighed according to required.Containing+
The soluble compound such as (NH of 4 valency oxidation state Ce elements4)2Ce(NO3)6, dispersion be pure deionized water, alcohol（It is ethanol, different
Propanol or 2- butanol）Or the mixed solution of water and alcohol arbitrary proportion, Ce elements and Cu in system2The chemical mol ratio of O is 0.02-
2.0。
（2）Preparation process：
Weigh the not oxidized Cu for CuO in surface2Be scattered under O100-500mg, normal temperature and pressure 300 mL deionized waters, alcohol or
In water-alcohol mixed liquor, the alcohol is ethanol, isopropanol or 2 butanol, based on material structure, performance mainly by Ce elements and Cu2O
Chemical mol ratio determines that the present invention controls Ce elements and Cu2The chemical mol ratio of O is 0.02-2.0, that is, weigh 100-2000mg
(NH4)2Ce(NO3)6Add and carry out in above-mentioned dispersion reaction preparation, after stirring 2 hours, stand system 30 minutes, then from
The heart isolates precipitate, and after above-mentioned dispersion solvent repeatedly washing, the drying of vacuum 333K obtains sample after 6 hours.Pass through
Conditions above is controlled, and is capable of achieving cerium oxide（Ce（III）And Ce（IV）Coexist and be designated as CeOx）With molecular scale thin layer high dispersive,
Uniformly, closely it is compound in Cu2On O matrixes, that is, obtain Cu2O surfaces high dispersive is combined CeOxLayer material, to resulting materials in sky
During atmosphere is enclosed, temperature is processed more than 3 hours higher than 623K, by matrix Cu2O is converted into CuO, you can obtain CuO surface recombination CeOx
Layer material.
By the compound CeO of prepared CuO surfaces high dispersivexLayer material is used for nitrogen oxides and reduces elimination reaction, selects
The chemical mol ratio of Ce and CuO is in 0.05-0.8（Ce and Cu when prepared by correspondence2The chemical mol ratio of O is 0.1-1.6）In the range of
Sample, weigh 180 mg and insert quartz tube reactor, be passed through volume and consist of NO:NH3:O2:SO2:N2=0.1:0.1:5:
0.02:94.78 reaction gas, air speed is 10000-50000 h-1, temperature-programmed reaction test is carried out, in the atmosphere containing sulfur dioxide
Under enclosing, the high conversion reduction removing of nitrogen oxides high selectivity can be realized between 513-613K, that is, possess good resistant to sulfur denitration
Performance.
Beneficial effects of the present invention：
（1）CeOxCan with molecular scale thin layer high dispersive, it is uniform, be closely compound in a nanometer Cu2O or CuO material surfaces.
（2）CeOxDispersing morphology and sample overall performance mainly by the Ce elements and Cu in preparation system2O chemistry rubs
, than determining, the proportion that the application is related to is 0.02-2.0 for you, and the batch of thus easily achieving sample is prepared and performance regulation and control.
（3）The chemical mol ratio of prepared sample Ce and CuO is in 0.05-0.8（Ce and Cu when prepared by correspondence2The chemistry of O rubs
You are than being 0.1-1.6）During scope, under the atmosphere containing sulfur dioxide, nitrogen oxides high selection can be realized between 513-613K
Property high conversion reduction removing, that is, possess good resistant to sulfur denitration performance.
Description of the drawings
Scanning electron microscope (SEM) the matrix Cu of Fig. 1 a typical samples2O spherical nanoparticle photos；
Fig. 1 b are scanning electron microscope (SEM) Cu of typical sample2O surface recombination CeOxGranule photo；
Fig. 1 c are scanning electron microscope (SEM) CuO surface recombination CeO of typical samplexGranule photo；
Fig. 2 a are the XPS spectrum Cu species spectral peak figure of typical sample；Fig. 2 b are the XPS spectrum Ce species spectral peak figure of typical sample；
In figure：Cu based on a2O spherical nanoparticles；B is Cu2O surface recombination CeOxGranule；C is CuO surface recombination CeOx
Grain；
Fig. 3 is the XRD spectra of typical sample；
In figure：Cu based on a2O spherical nanoparticles；B is Cu2O surface recombination CeOxGranule；C is CuO surface recombination CeOx
Grain；
Fig. 4 removes performance test curve for the resistant to sulfur nitrous oxides selectivity reduction of typical sample；
In figure：Cu based on a2O spherical nanoparticles；B is Cu2O surface recombination CeOxGranule；C is CuO surface recombination CeOx
Grain.
Specific embodiment
Implement example：Ball shaped nano Cu2O surface recombination CeOxThe synthetic method of material, analyze and use example
Synthetic method：Under normal temperature and pressure, by the Cu that the size of brand-new is 200 nm2O spheroidal particle weighs appropriate such as 400 mg points
Dissipate in 300 mL deionized waters, according to Ce elements and Cu2The chemical mol ratio modification scope of O is 0.1-1.6, weighs 1000-
1600 mg (NH4)2Ce(NO3)6Add and carry out in above-mentioned dispersion reaction preparation, high degree of agitation stands system after 2 hours
30 minutes, then centrifugation went out precipitate, and repeatedly after washing, vacuum 333K obtains Cu to deionized water after being dried 6 hours2O
The compound CeOx layer materials of surface high dispersive, to resulting materials in air atmosphere, temperature is processed higher than 623K more than 3 hours will
Matrix Cu2O is converted into CuO, you can obtain the compound CeO of CuO surfaces high dispersivexLayer material.
Analysis：Choose matrix material Cu2O spherical nanoparticles (a), ball shaped nano Cu2O surface recombination CeOxGranule (b) with
And ball shaped nano CuO surface recombination CeOxThree kinds of typical samples of granule (c), by scanning electron microscope (SEM), X-ray electronic energy
Spectrum（XPS）With X-ray diffraction spectrogram（XRD）Pattern, surface condition and structural analyses are carried out.Fig. 1 a-1c are three kinds of samples
SEM photograph, it is seen that three kinds of samples are all similar nanometer spherical state, it is meant that the sample containing Ce and matrix material Cu2O is compared
Overall pattern does not have significant changes.Shown by XPS result figures 2a and Fig. 2 b, relative to matrix material Cu2O (a), the sample containing Ce
(b) and (c) in addition to having corresponding Cu oxide species spectral peak, also+3 (III) ,+4 (IV) valency Ce elemental characteristic spectral peaks；And by XRD
Spectrogram Fig. 3 shows that the sample (b) containing Ce and (c) only have the diffraction maximum of corresponding Cu oxide matrix, and synthesis result shows these materials
Material body phase be that main body is still maintained Cu oxide, and define on its surface be evenly distributed, multivalent state CeO that dispersion is higherx
Kind of the sample containing Ce of compound thin layer, i.e., two is Cu oxide surface recombination cerium oxide layer materials.
Catalyst uses example：By the compound CeO of prepared CuO surfaces high dispersivexLayer material exists for nitrogen oxides
Elimination reaction in atmosphere containing sulfur dioxide, from Ce and CuO chemical mol ratio in 0.05-0.8（Correspondence prepare when Ce with
Cu2The chemical mol ratio of O is 0.1-1.6）In the range of sample, weigh 180 mg and insert quartz tube reactor, be passed through volume
Consist of NO:NH3:O2:SO2:N2=0.1:0.1:5:0.02:94.78 reaction gas, air speed is 10000-50000 h-1, carry out
Temperature-programmed reaction is tested, as a result as shown in figure 4, under the atmosphere containing sulfur dioxide, nitrogen oxygen can be realized between 513-613K
The high conversion reduction removing of compound high selectivity, that is, possess good resistant to sulfur denitration performance.
Claims (2)
1. a kind of preparation method of Cu oxide surface recombination cerium oxide layer materials, it is characterised in that：Weigh material surface not by
It is oxidized to the Cu of CuO2During 300 mL deionized waters, alcohol or water-alcohol mixed liquor are scattered under O 100-500mg, normal temperature and pressure；Base
In material structure, performance mainly by Ce elements and Cu2O chemistry mol ratios determine that the present invention controls Ce elements and Cu2The chemistry of O rubs
You weigh 100-2000mg (NH than being 0.02-2.04)2Ce(NO3)6Add and carry out in above-mentioned dispersion reaction preparation,
After stirring 2 hours, system 30 minutes are stood；Then centrifugation goes out precipitate, after repeatedly being washed with above-mentioned dispersion solvent,
Vacuum 333K is dried 6 hours；Cerium oxide is capable of achieving by conditions above control（Ce（III）And Ce（IV）Coexist and be designated as CeOx）With
Molecular scale thin layer high dispersive, it is uniform, be closely compound in Cu2On O matrixes, that is, obtain Cu2O surface recombination CeOxLayer material；It is right
In air atmosphere, temperature is processed more than 3 hours resulting materials higher than 623 K, by matrix Cu2O is converted into CuO, you can enter one
Step obtains CuO surface recombination CeOxLayer material.
2. a kind of preparation method of Cu oxide surface recombination cerium oxide layer materials according to claim 1, its feature exists
In：The alcohol is ethanol, isopropanol or 2- butanol.
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| CN1907561A (en) * | 2006-07-28 | 2007-02-07 | 华南理工大学 | Method for combination preparation of CuO/CeO2/gamma-Al2O by use of ultrasound-plasma |
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| 包蕙质: "CuOx-CeO2复合氧化物的结构调控和催化性能", 《中国博士学位论文全文数据库 工程科技I辑》 * |
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