CN109663595A - A kind of copper based composite metal oxidate hollow microsphere, preparation method and the usage - Google Patents

A kind of copper based composite metal oxidate hollow microsphere, preparation method and the usage Download PDF

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CN109663595A
CN109663595A CN201910118068.2A CN201910118068A CN109663595A CN 109663595 A CN109663595 A CN 109663595A CN 201910118068 A CN201910118068 A CN 201910118068A CN 109663595 A CN109663595 A CN 109663595A
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hollow microsphere
copper
metal
hollow
oxide
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苏发兵
纪永军
谭强强
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Institute of Process Engineering of CAS
Langfang Institute of Process Engineering of CAS
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Langfang Institute of Process Engineering of CAS
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    • C07F7/00Compounds containing elements of Groups 4 or 14 of the Periodic Table
    • C07F7/02Silicon compounds
    • C07F7/08Compounds having one or more C—Si linkages
    • C07F7/12Organo silicon halides
    • C07F7/16Preparation thereof from silicon and halogenated hydrocarbons direct synthesis
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    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/002Mixed oxides other than spinels, e.g. perovskite
    • 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
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    • 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
    • B01J23/80Catalysts 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
    • 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
    • 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
    • B01J23/84Catalysts 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 arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/889Manganese, technetium or rhenium
    • B01J23/8892Manganese
    • 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
    • B01J35/30Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • B01J35/396Distribution of the active metal ingredient
    • B01J35/397Egg shell like
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B82NANOTECHNOLOGY
    • B82YSPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00Nanotechnology for materials or surface science, e.g. nanocomposites
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B82NANOTECHNOLOGY
    • B82YSPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
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Abstract

The present invention provides a kind of copper based composite metal oxidate hollow microsphere, preparation method and the usage, the hollow microsphere is made of the oxide bead of copper oxide shell and the metal M being embedded on shell, and the metal M is transition metal element.Structure is complicated for copper based composite metal oxidate hollow microsphere of the present invention, and pattern is unique, and size uniformity, there is synergistic effect between copper oxide and transition metal oxide;The hollow microsphere does not use any organic solvent and surfactant using hydro-thermal-roasting method synthesis, mild condition, and cost is relatively low, environmentally friendly, reproducible, is suitble to industrialized production;The hollow microsphere is widely used in fields such as catalysis, photoelectricity and medicament transports, and the catalyst as organic silicon monomer synthetic reaction shows excellent catalytic performance.

Description

A kind of copper based composite metal oxidate hollow microsphere, preparation method and the usage
Technical field
The invention belongs to micro Nano material synthesis technical fields, and in particular to a kind of copper based composite metal oxidate is hollow micro- Ball, preparation method and the usage.
Background technique
Since hollow microsphere material has high specific surface area and high atom utilization efficiency, so that it has in many fields Be widely applied, nowadays such as catalysis, gas sensor, environmental pollution, energy storage, cosmetics and drug delivery have become For one of the hot spot of material science research field.
Synthesizing has the method for different hollow structure materials varied, and main method includes sol-gal process, template Method, electrochemical deposition method and reverse micelle method etc..Wherein, template have been found be it is most effective, be currently used method it One.However, this method and step is extremely complex: firstly the need of synthesis template, target material being then coated on template On surface, template agent removing is finally removed again.Synthesis cost is undoubtedly increased in this way, and will also tend to during removing removing template Hollow structure is caused to collapse.
In recent years, more concerns, this method preparation are caused by nano material self assembly hollow microsphere material Obtained material has both the characteristics of nanometer and micrometer structure.For example, Yao et al. is using ethylene glycol as solvent, with polyvinylpyrrolidine Ketone (PVP) makees additive, by Co3O4Nanometer sheet is assembled into more shell Co3O4Hollow microsphere (Adv.Funct.Mater.2010, 20,1680-1686);Lou et al. passes through the Fe being formed in situ using ethylene glycol and ethylenediamine as mixed solvent3O4Nanometer plate carrys out structure Build Fe3O4Multistage hollow microsphere (Angew.Chem., Int.Ed.2013,52,4165-4168);Then, Lou et al. again report with Glycerol, isopropyl alcohol and water are mixed solvent, by assembling Fe3O4Ultrathin nanometer piece is prepared for Fe3O4Hollow microsphere (Adv.Mater.2015,27,4097-4101).But above-mentioned hollow material is all only made of single metal oxide, and And in order to control the pattern of product, organic solvent and surfactant are used in synthesis process, not only increases preparation cost, can also Cause environmental pollution.
Cu oxide has different morphologies and structure as a kind of important metal oxide, in catalysis, bio-sensing The fields such as device, solar battery have a wide range of applications, however relative to single metal oxide, multi-component metal oxide is past Toward unique synergistic effect can be shown, advantage has been shown in many fields.Therefore, by multi-component metal oxide and Hollow structure combines, and using the advantage of the two, improves the Nomenclature Composition and Structure of Complexes of single oxide, it is possible to show unique function Energy characteristic shows wide application prospect in catalysis and energy conversion field.
Therefore, studying a kind of copper based composite metal oxidate with hollow structure, high catalytic efficiency is current research One of direction, while keeping preparation method as simple pervasive as possible and can realize prepare with scale.
Summary of the invention
Aiming at the problems existing in the prior art, the purpose of the present invention is to provide in a kind of copper based composite metal oxidate Empty microballoon, preparation method and the usage, structure is complicated for the hollow microsphere, and pattern is unique, and size is more uniform, by composition metal Oxide composition;Preparation method is simple, and cost is relatively low, does not use organic solvent, can be used as urging for organic silicon monomer synthetic reaction Agent shows excellent catalytic performance.
To achieve this purpose, the present invention adopts the following technical scheme:
In a first aspect, the hollow microsphere is by oxygen the present invention provides a kind of copper based composite metal oxidate hollow microsphere The oxide bead for changing copper shell and the metal M being embedded on shell is constituted, and the metal M is transition metal element.
In the present invention, the hollow microsphere is made of on the Nomenclature Composition and Structure of Complexes two parts, by copper oxide and mistake on composition Metal oxide composition is crossed, is made of in structure inner hollow shell and the particle being embedded on shell, the special construction Hollow microsphere in terms of have significant effect, be used as catalysts when, have excellent catalytic properties.
It is used as currently preferred technical solution below, but not as the limitation of technical solution provided by the invention, passes through Following technical scheme can preferably reach and realize technical purpose and beneficial effect of the invention.
As currently preferred technical solution, the metal M include any one in Ce, Zn, Co, Mn, Fe or Ni or At least two combination, the combination is typical but non-limiting example has: the combination of the combination of Ce and Zn, Co and Fe, Ce, Zn and The combination of Mn, the combination of Mn, Fe and Ni, the combination etc. of Ce, Zn, Co and Mn.
Preferably, in the hollow microsphere molar ratio of copper and metal M be (1~100): 1, for example, 1:1,5:1,10:1, 20:1,30:1,40:1,50:1,60:1,70:1,80:1,90:1 or 100:1 etc., it is not limited to cited numerical value, it should Other unlisted numerical value are equally applicable in numberical range, preferably (10~100): 1.
In the present invention, the molar ratio of copper and metal M are one of an important factor for influencing product structure pattern, if the two is rubbed You are then unable to get multistage composite structure than excessive;If the two molar ratio is too small, what is obtained is the oxygen of the CuO and M mutually separated The mixture of compound, rather than composite oxides.
Preferably, the copper oxide shell is from inside to outside successively are as follows: hollow cavity, disorderly arranged nano particle, nanometer The nanometer rods and porous nano-sheet that grain assembles.
Copper oxide shell in the present invention is assembled by multilayered structure, and inside is hollow structure, outward successively includes receiving Rice grain layer, nanometer rods and nanometer sheet, copper oxide nanometer particle is disorderly arranged in nano-particle layer, and nanometer rods are by cupric oxide nano Particle assembles, and is integrally formed the copper oxide shell of unique structure.
Preferably, the oxide bead of the metal M is assembled by the nano particle of metal M oxide.
As currently preferred technical solution, the diameter of the hollow cavity is 1~6 μm, such as 1 μm, 2 μm, 3 μm, 4 μ M, 5 μm or 6 μm etc., it is not limited to cited numerical value, other interior unlisted numerical value of the numberical range are equally applicable.
Preferably, the partial size of the disorderly arranged nano particle be 20~100nm, such as 20nm, 30nm, 40nm, 50nm, 60nm, 70nm, 80nm, 90nm or 100nm etc., it is not limited to cited numerical value, in the numberical range, other are not The numerical value enumerated is equally applicable.
Preferably, the length of the nanometer rods be 100~300nm, such as 100nm, 120nm, 150nm, 180nm, 200nm, 220nm, 240nm, 260nm, 280nm or 300nm etc., it is not limited to cited numerical value, in the numberical range Other unlisted numerical value are equally applicable;Width be 50~150nm, such as 50nm, 60nm, 70nm, 80nm, 100nm, 120nm, 130nm, 140nm or 150nm etc., it is not limited to cited numerical value, other interior unlisted numerical value of the numberical range are same Sample is applicable in.
Preferably, the porous nano-sheet with a thickness of 10~100nm, such as 10nm, 20nm, 30nm, 40nm, 50nm, 60nm, 70nm, 80nm, 90nm or 100nm etc., it is not limited to cited numerical value, other are unlisted in the numberical range Numerical value it is equally applicable.
Preferably, the partial size of the oxide bead of the metal M be 100~600nm, such as 100nm, 150nm, 200nm, 250nm, 300nm, 350nm, 400nm, 450nm, 500nm, 550nm or 600nm etc., it is not limited to cited numerical value, Other unlisted numerical value are equally applicable in the numberical range.
Preferably, the partial size of the nano particle of the metal M oxide be 5~20nm, such as 5nm, 8nm, 10nm, 12nm, 15nm, 18nm or 20nm etc., it is not limited to cited numerical value, other interior unlisted numerical value of the numberical range It is equally applicable.
Preferably, the hollow microsphere is porous structure, and the partial size of the hollow microsphere is 2~8 μm, for example, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm or 8 μm etc., it is not limited to cited numerical value, other interior unlisted numerical value of the numberical range It is equally applicable.
In the present invention, the porous structure of hollow microsphere makes the specific surface area of hollow microsphere larger, facilitates the suction of substance It is attached, shorten the path of electron transmission, improves mass transfer efficiency.
Second aspect, the present invention provides a kind of preparation method of above-mentioned copper based composite metal oxidate hollow microsphere, institutes The method of stating includes the following steps:
(1) lye is added into copper presoma and metal M precursor mixed solution, obtains suspension;
(2) suspension for obtaining step (1) carries out hydro-thermal reaction, and products therefrom is separated by solid-liquid separation, and obtains solid product;
(3) the solid product calcination process for obtaining step (2), obtains copper based composite metal oxidate hollow microsphere.
In the present invention, the preparation process of the hollow microsphere is relatively simple, and presoma mixed liquor successively carries out hydro-thermal, roasting Processing, by the control to reactant, reaction condition, is prepared the hollow microsphere of unique structure.
As currently preferred technical solution, in step (1) described mixed solution, copper ion and metal M ion rub You than be (1~100): 1, for example, 1:1,5:1,10:1,20:1,30:1,40:1,50:1,60:1,70:1,80:1,90:1 or 100:1 etc., it is not limited to cited numerical value, other interior unlisted numerical value of the numberical range are equally applicable, and preferably (10 ~100): 1.
In the present invention, the molar ratio of copper and metal M are one of an important factor for influencing product structure pattern, if the two is rubbed You are then unable to get multistage composite structure, if the two molar ratio is too small, what is obtained is the oxygen of the CuO and M mutually separated than excessive The mixture of compound, rather than composite oxides.
Preferably, in step (1) described mixed solution, the concentration of copper ion is 0.05~0.4mol/L, such as 0.05mol/L、0.08mol/L、0.1mol/L、0.15mol/L、0.2mol/L、0.25mol/L、0.3mol/L、0.35mol/L Or 0.4mol/L etc., it is not limited to cited numerical value, other interior unlisted numerical value of the numberical range are equally applicable.
Preferably, step (1) the copper presoma is soluble copper salt, and metal M presoma is soluble metal M salt.
Preferably, the soluble copper salt is any in copper nitrate, copper acetate, copper chloride, copper sulphate or copper bromide It is a kind of or at least two combination, the combination is typical but non-limiting example has: the combination of copper nitrate and copper chloride, copper nitrate With the combination of copper acetate, the combination of copper chloride and copper sulphate, the combination of copper nitrate, copper chloride and copper sulphate, copper acetate, copper chloride With the combination of copper bromide etc., preferably copper nitrate.
Preferably, the soluble metal M salt is selected from nitrate, acetate, chlorate, sulfate or the bromination of metal M In salt any one or at least two combination, the combination is typical but non-limiting example has: the nitrate and chlorate of M Combination, the combination of the nitrate and acetate of M, the combination of the chlorate and sulfate of M, nitrate, chlorate and the acetic acid of M The combination etc. of salt, the preferably nitrate of M.
As currently preferred technical solution, step (1) described lye includes sodium carbonate liquor, solution of potassium carbonate, urine In plain solution or sodium hydroxide solution any one or at least two combination, the combination is typical but non-limiting example Have: the combination of the combination of sodium carbonate liquor and solution of potassium carbonate, sodium carbonate liquor and urea liquid, sodium carbonate liquor and hydroxide The combination of sodium solution, the combination of sodium carbonate liquor, solution of potassium carbonate and sodium hydroxide solution, solution of potassium carbonate, urea liquid with The combination etc. of sodium hydroxide solution.
Preferably, the concentration of step (1) described lye is 0.1~4mol/L, such as 0.1mol/L, 0.5mol/L, 1mol/ L, 1.5mol/L, 2mol/L, 2.5mol/L, 3mol/L, 3.5mol/L or 4mol/L etc., it is not limited to cited number Value, other interior unlisted numerical value of the numberical range are equally applicable.
Preferably, the volume ratio of step (1) lye and mixed solution is 1:3~3:1, such as 1:3,1:2,2:3,1: 1,3:2,2:1 or 3:1 etc., it is not limited to cited numerical value, other interior unlisted numerical value of the numberical range are equally suitable With.
Preferably, the adding manner of step (1) described lye is to be added dropwise.
Preferably, step (1) described lye is added under agitation.
Preferably, the rate of the stirring be 400~1200r/min, such as 400r/min, 500r/min, 600r/min, 700r/min, 800r/min, 900r/min, 1000r/min or 1200r/min etc., it is not limited to cited numerical value, it should Other unlisted numerical value are equally applicable in numberical range.
As currently preferred technical solution, the temperature of step (2) described hydro-thermal reaction is 60~180 DEG C, such as 60 DEG C, 80 DEG C, 100 DEG C, 120 DEG C, 140 DEG C, 160 DEG C or 180 DEG C etc., it is not limited to cited numerical value, the numberical range Other interior unlisted numerical value are equally applicable, and preferably 120 DEG C.
Preferably, the time of step (2) described hydro-thermal reaction be 0.5~for 24 hours, such as 0.5h, 2h, 4h, 6h, 8h, 10h, 12h, 16h, 20h or for 24 hours etc., it is not limited to cited numerical value, other unlisted numerical value are same in the numberical range It is applicable in, preferably 12h.
Preferably, step (2) described hydro-thermal reaction carries out in hydrothermal reaction kettle.
Preferably, the volume of the hydrothermal reaction kettle be 100~1000mL, such as 100mL, 200mL, 300mL, 500mL, 600mL, 800mL or 1000mL etc., it is not limited to cited numerical value, other interior unlisted numerical value of the numberical range are same Sample is applicable in.
Preferably, the liner of the hydrothermal reaction kettle is polytetrafluoroethylene (PTFE).
As currently preferred technical solution, after step (2) described separation of solid and liquid, washing, drying obtain solid production Object.
Preferably, the temperature of the drying is 60~200 DEG C, such as 60 DEG C, 80 DEG C, 100 DEG C, 120 DEG C, 140 DEG C, 160 DEG C, 180 DEG C or 200 DEG C etc., it is not limited to cited numerical value, other unlisted numerical value are equally suitable in the numberical range With.
Preferably, the time of the drying be 6~20h, such as 6h, 8h, 10h, 12h, 15h, 16h, 18h or 20h etc., but It is not limited in cited numerical value, other unlisted numerical value are equally applicable in the numberical range.
As currently preferred technical solution, the temperature of step (3) described roasting is 200~800 DEG C, such as 200 DEG C, 250 DEG C, 300 DEG C, 350 DEG C, 400 DEG C, 450 DEG C, 500 DEG C, 550 DEG C, 600 DEG C, 650 DEG C, 700 DEG C, 750 DEG C or 800 DEG C etc., but It is not limited in cited numerical value, other unlisted numerical value are equally applicable in the numberical range.
Preferably, the time of step (3) described roasting be 2~for 24 hours, such as 2h, 4h, 6h, 8h, 10h, 12h, 14h, 16h, 18h, 20h, 22h or for 24 hours etc., it is not limited to cited numerical value, other unlisted numerical value are same in the numberical range It is applicable in.
The third aspect, the present invention provides a kind of purposes of above-mentioned copper based composite metal oxidate hollow microsphere, it is described in Empty microballoon is used as the catalyst of organic silicon monomer synthetic reaction.
Preferably, the hollow microsphere is used as the catalyst of dimethyldichlorosilane selectivity synthesis.
Dimethyldichlorosilane be prepare organosilicon material it is most important be also the maximum monomer of dosage, it is to pass through Rochow Directly reaction obtains under the action of copper-based catalysts for reaction, i.e. monochloro methane (MeCl) and silicon powder (Si), reaction equation are as follows:
In above-mentioned reaction equation, M1 is Trichloromethyl silane, and M2 is dimethyldichlorosilane, and M3 is one chlorine silicon of trimethyl Alkane, M1H are methyl hydrogen dichlorosilane, and M2H is one chlorosilane of dimethyl hydrogen, and LBR is low-boiling-point substance, and HBR is high-boiling components.And it is of the invention The hollow microsphere is the selectivity of M2 product and the conversion ratio of silicon powder in improving the reaction as the purpose of catalyst.
Compared with prior art, the invention has the following advantages:
(1) structure is complicated for copper based composite metal oxidate hollow microsphere of the present invention, and pattern is unique, and size uniformity, There is synergistic effect between copper oxide and transition metal oxide, is expected to obtain extensively in fields such as catalysis, photoelectricity and medicament transports General application;
(2) hollow microsphere of the present invention is using hydro-thermal-roasting method synthesis, and preparation method is easy, and universality is strong, reproducibility It is good, the hollow microsphere of various ingredients can be prepared, cost is relatively low, and does not use any organic solvent and additive, is suitble to industry rule Modelling production;
(3) hollow microsphere of the present invention can be used as the catalyst of organic silicon monomer synthetic reaction, show excellent urge Change performance, the selectivity of target product dimethyldichlorosilane reaches 86.0% or more, and silicon power raw material conversion ratio reaches 40.0% More than.
Detailed description of the invention
Fig. 1 is CuO-CeO made from the embodiment of the present invention 12The XRD diagram of composite oxides hollow microsphere;
Fig. 2 a, Fig. 2 b and Fig. 2 c are CuO-CeO made from embodiment 12The SEM of composite oxides hollow microsphere schemes;
Fig. 3 a is CuO-CeO made from embodiment 12SEM figure inside composite oxides hollow microsphere;
Fig. 3 b is CuO-CeO made from embodiment 12The SEM of composite oxides hollow microsphere shell layer surface schemes;
Fig. 4 is CuO-CeO made from embodiment 12The TEM of composite oxides hollow microsphere schemes;
Fig. 5 is CuO-CeO made from embodiment 12The Element area profile of composite oxides hollow microsphere;
Fig. 6 is the XRD diagram of CuO-ZnO composite oxides hollow microsphere made from embodiment 2;
Fig. 7 a is the SEM figure of CuO-ZnO composite oxides hollow microsphere made from embodiment 2;
Fig. 7 b is the Element area profile of CuO-ZnO composite oxides hollow microsphere made from embodiment 2;
Fig. 8 is CuO-Co made from embodiment 33O4The XRD diagram of composite oxides hollow microsphere;
Fig. 9 a is CuO-Co made from embodiment 33O4The SEM of composite oxides hollow microsphere schemes;
Fig. 9 b is CuO-Co made from embodiment 33O4The Element area profile of composite oxides hollow microsphere;
Figure 10 is CuO-MnO made from embodiment 42The XRD diagram of composite oxides hollow microsphere;
Figure 11 a is CuO-MnO made from embodiment 42The SEM of composite oxides hollow microsphere schemes;
Figure 11 b is CuO-MnO made from embodiment 42The Element area profile of composite oxides hollow microsphere.
Specific embodiment
In order to better illustrate the present invention, it is easy to understand technical solution of the present invention, below further specifically to the present invention It is bright.But following embodiments is only simple example of the invention, does not represent or limit the scope of the present invention, this hair Bright protection scope is subject to claims.
Specific embodiment of the invention part provides a kind of copper based composite metal oxidate hollow microsphere and its preparation side Method, the hollow microsphere are made of the oxide bead of copper oxide shell and the metal M being embedded on shell, and the metal M is Transition metal element.
Preparation method includes the following steps:
(1) lye is added into copper presoma and metal M precursor mixed solution, obtains suspension;
(2) suspension for obtaining step (1) carries out hydro-thermal reaction, and products therefrom is separated by solid-liquid separation, and obtains solid product;
(3) the solid product calcination process for obtaining step (2), obtains copper based composite metal oxidate hollow microsphere.
The following are typical but non-limiting embodiments of the invention:
Embodiment 1:
Present embodiments provide a kind of CuO-CeO2Composite oxides hollow microsphere, the hollow microsphere by CuO shell and The CeO being embedded on shell2Bead is constituted, and the CuO shell is from inside to outside successively are as follows: hollow cavity, disorderly arranged nanometer The nanometer rods and porous nano-sheet that grain, nano particle assemble.
The preparation method of the hollow microsphere includes the following steps:
(1) 1.1g copper acetate and 0.095g cerous acetate are dissolved in (Cu in 60mL water2+Concentration be 0.1mol/L, nCu:nCe =20:1), the sodium carbonate liquor 20mL for being 0.3mol/L to obtained mixed solution and dripping concentration, in 1000r/min revolving speed Lower stirring 0.5h, obtains suspension;
(2) suspension is transferred in the water heating kettle of polytetrafluoroethyllining lining of 100mL, the hydro-thermal reaction at 140 DEG C 11h, cooled and filtered, obtained solid deionized water and dehydrated alcohol dry 12h after washing for several times under the conditions of 60 DEG C;
(3) product after drying is roasted into 12h under the conditions of 400 DEG C under oxygen atmosphere, obtains CuO-CeO2Combined oxidation Object hollow microsphere.
By CuO-CeO obtained2Composite oxides hollow microsphere is produced using Panalytical company, Holland (Panaco) X ' Pert PRO MPD type Multi-functional X ray diffractometer carry out XRD test, as a result as shown in Figure 1;By hollow microsphere obtained Its microscopic appearance is observed using the JSM-7001F type scanning electron microscope that Japanese JEOL company produces, SEM figure in surface is as schemed Shown in 2a-2c, as shown in Figure 3a, the SEM figure of hollow microsphere shell layer surface is as shown in Figure 3b for the SEM figure inside hollow microsphere;It will Hollow microsphere obtained observes its internal junction on the JEM-2010F type transmission electron microscope using the production of JEOL company, Japan Structure, TEM figure are as shown in Figure 4;Hollow microsphere obtained is used to the INCA X-MAX type energy disperse spectroscopy of England Oxford company production Test elements distribution situation, Element area profile are as shown in Figure 5;Hollow microsphere obtained is used into U.S. Pekin-Elmer Inductively coupled plasma atomic emission spectrometer carries out ICP test.
In the present embodiment, as shown in Figure 1, the diffraction maximum of the hollow microsphere includes CuO and CeO2Characteristic diffraction peak, In, " ▼ " represents the characteristic diffraction peak of CuO,Represent CeO2Characteristic diffraction peak, show the material be CuO and CeO2Answer Close oxide;
By Fig. 2 a it is found that the material morphology and size uniformity, spherical in shape, particle size is about 5 μm, rough surface;By Fig. 2 b and Fig. 2 c are it is found that the microballoon is hollow structure, and a large amount of porous nano-sheet vertical-growths are in microsphere surface, nanometer sheet thickness About 20nm;By Fig. 3 a it is found that being disorderly arranged nano particle, average grain diameter 30nm, by Fig. 3 b inside the microballoon It is found that being nanometer rods above nano-particle layer, length is about 200nm, and width is about 80nm;Bead is embedded in shell layer surface, greatly Small about 600nm, is formed by nano-particles self assemble;Equally, as shown in Figure 4, the microballoon be hollow structure, hollow cavity it is straight Diameter is about 4 μm;
By the Element area profile of Fig. 5 hollow microsphere it is found that Cu element is uniformly distributed in microballoon shell, Ce element uniformly divides The bead being distributed in shell layer surface, and O element is uniformly distributed in entire microballoon;
By ICP test result it is found that CuO-CeO2The molar ratio of Cu and Ce is about 20:1 in composite oxides hollow microsphere.
Embodiment 2:
A kind of CuO-ZnO composite oxides hollow microsphere is present embodiments provided, the hollow microsphere is by CuO shell and edge ZnO bead on shell is constituted, and the CuO shell is from inside to outside successively are as follows: hollow cavity, disorderly arranged nano particle, The nanometer rods and porous nano-sheet that nano particle assembles.
The preparation method of the hollow microsphere includes the following steps:
(1) 0.55g copper acetate and 0.057g zinc nitrate are dissolved in (Cu in 60mL water2+Concentration be 0.05mol/L, nCu: nZn=10:1), the solution of potassium carbonate 100mL for being 0.1mol/L to obtained mixed solution and dripping concentration turns in 800r/min Speed is lower to stir 0.8h, obtains suspension;
(2) suspension is transferred in the water heating kettle of polytetrafluoroethyllining lining of 200mL, the hydro-thermal reaction 4h at 180 DEG C, Cooled and filtered, obtained solid deionized water and dehydrated alcohol dry 10h after washing for several times under the conditions of 80 DEG C;
(3) 2h will be roasted under the conditions of the product after drying in air atmosphere 800 DEG C, obtains CuO-ZnO composite oxides Hollow microsphere.
By CuO-CeO obtained2Composite oxides hollow microsphere carries out XRD test, knot using Multi-functional X ray diffractometer Fruit is as shown in Figure 6;Hollow microsphere obtained is observed into its microscopic appearance using scanning electron microscope, SEM schemes such as Fig. 7 a institute Show;Hollow microsphere obtained is used into energy disperse spectroscopy test elements distribution situation, Element area profile is as shown in Figure 7b;It will be made Hollow microsphere ICP test, above-mentioned test instrument and reality are carried out using inductively coupled plasma atomic emission spectrometer It is identical to apply example 1.
In the present embodiment, it will be appreciated from fig. 6 that the diffraction maximum of the hollow microsphere includes the characteristic diffraction peak of CuO and ZnO, In, " ▼ " represents the characteristic diffraction peak of CuO,The characteristic diffraction peak for representing ZnO shows that the material is answering for CuO and ZnO Close oxide;
By Fig. 7 a it is found that material graininess spherical in shape, particle size are about 5 μm, rough surface, surface vertical-growth There are nanometer rods or nanometer sheet;By Fig. 7 b it is found that Cu element is uniformly distributed in microballoon shell, Zn element is uniformly distributed in embedded in shell Bead on surface, and O element is uniformly distributed in entire microballoon;
By ICP test result it is found that the molar ratio of Cu and Zn is about 10:1 in CuO-ZnO composite oxides hollow microsphere.
Embodiment 3:
Present embodiments provide a kind of CuO-Co3O4Composite oxides hollow microsphere, the hollow microsphere by CuO shell and The Co being embedded on shell3O4Bead is constituted, and the CuO shell is from inside to outside successively are as follows: hollow cavity, disorderly arranged nanometer The nanometer rods and porous nano-sheet that grain, nano particle assemble.
The preparation method of the hollow microsphere includes the following steps:
(1) 3.24g copper chloride and 0.039g cobalt chloride are dissolved in (Cu in 60mL water2+Concentration be 0.4mol/L, nCu:nCo =80:1), the urea liquid 20mL for being 1mol/L to obtained mixed solution and dripping concentration is stirred under 400r/min revolving speed 1.5h obtains suspension;
(2) suspension is transferred in the water heating kettle of polytetrafluoroethyllining lining of 100mL, at 60 DEG C hydro-thermal reaction for 24 hours, Cooled and filtered, obtained solid deionized water and dehydrated alcohol dry 8h after washing for several times under the conditions of 100 DEG C;
(3) product after drying is roasted into 20h under the conditions of 250 DEG C under oxygen atmosphere, obtains CuO-Co3O4Combined oxidation Object hollow microsphere.
By CuO-Co obtained3O4Composite oxides hollow microsphere carries out XRD test, knot using Multi-functional X ray diffractometer Fruit is as shown in Figure 8;Hollow microsphere obtained is observed into its microscopic appearance using scanning electron microscope, SEM schemes such as Fig. 9 a institute Show;Hollow microsphere obtained is used into energy disperse spectroscopy test elements distribution situation, Element area profile is as shown in figure 9b;It will be made Hollow microsphere ICP test, above-mentioned test instrument and reality are carried out using inductively coupled plasma atomic emission spectrometer It is identical to apply example 1.
In the present embodiment, as shown in Figure 8, the diffraction maximum of the hollow microsphere includes CuO and Co3O4Characteristic diffraction peak, In, " ▼ " represents the characteristic diffraction peak of CuO,Represent Co3O4Characteristic diffraction peak, show the material be CuO and Co3O4's Composite oxides;
By Fig. 9 a it is found that material graininess spherical in shape, particle size are about 5 μm, rough surface, surface vertical-growth There are nanometer rods or nanometer sheet;By Fig. 9 b it is found that Cu element is uniformly distributed in microballoon shell, Co element is uniformly distributed in embedded in shell Bead on surface, and O element is uniformly distributed in entire microballoon;
By ICP test result it is found that CuO-Co3O4The molar ratio of Cu and Co is about 80:1 in composite oxides hollow microsphere.
Embodiment 4:
Present embodiments provide a kind of CuO-MnO2Composite oxides hollow microsphere, the hollow microsphere by CuO shell and The MnO being embedded on shell2Bead is constituted, and the CuO shell is from inside to outside successively are as follows: hollow cavity, disorderly arranged nanometer The nanometer rods and porous nano-sheet that grain, nano particle assemble.
The preparation method of the hollow microsphere includes the following steps:
(1) 1.692g copper nitrate and 0.0136g manganese sulfate are dissolved in (Cu in 30mL water2+Concentration be 0.3mol/L, nCu: nMn=100:1), the sodium hydroxide solution 10mL for being 3mol/L to obtained mixed solution and dripping concentration turns in 600r/min Speed is lower to stir 1h, obtains suspension;
(2) suspension is transferred in the water heating kettle of polytetrafluoroethyllining lining of 100mL, the hydro-thermal reaction at 100 DEG C 12h, cooled and filtered, obtained solid deionized water and dehydrated alcohol dry 6h after washing for several times under the conditions of 150 DEG C;
(3) product after drying is roasted into 8h under the conditions of 600 DEG C under oxygen atmosphere, obtains CuO-MnO2Composite oxides Hollow microsphere.
By CuO-MnO obtained2Composite oxides hollow microsphere carries out XRD test, knot using Multi-functional X ray diffractometer Fruit is as shown in Figure 10;Hollow microsphere obtained is observed into its microscopic appearance, SEM figure such as Figure 11 a using scanning electron microscope It is shown;Hollow microsphere obtained is used into energy disperse spectroscopy test elements distribution situation, Element area profile is as shown in figure 11b;It will Hollow microsphere obtained carries out ICP test, above-mentioned test instrument using inductively coupled plasma atomic emission spectrometer It is same as Example 1.
In the present embodiment, as shown in Figure 10, the diffraction maximum of the hollow microsphere includes CuO and MnO2Characteristic diffraction peak, Wherein, " ▼ " represents the characteristic diffraction peak of CuO,Represent MnO2Characteristic diffraction peak, show the material be CuO and MnO2's Composite oxides;
By Figure 11 a it is found that material graininess spherical in shape, particle size are about 5 μm, rough surface;It can by Figure 11 b Know, Cu element is uniformly distributed in microballoon shell, and Mn element is uniformly distributed in the bead in shell layer surface, and O element is uniform It is distributed in entire microballoon;
By ICP test result it is found that CuO-MnO2The molar ratio of Cu and Mn is about 100 in composite oxides hollow microsphere: 1。
Embodiment 5:
A kind of CuO-NiO composite oxides hollow microsphere is present embodiments provided, the hollow microsphere is by CuO shell and edge NiO bead on shell is constituted, and the CuO shell is from inside to outside successively are as follows: hollow cavity, disorderly arranged nano particle, The nanometer rods and porous nano-sheet that nano particle assembles.
The preparation method of the hollow microsphere includes the following steps:
(1) 2.184g copper acetate and 2.124g nickel acetate are dissolved in (Cu in 60mL water2+Concentration be 0.2mol/L, nCu: nMn=1:1), the sodium carbonate liquor 20mL for being 4mol/L to obtained mixed solution and dripping concentration, under 1000r/min revolving speed 0.5h is stirred, suspension is obtained;
(2) suspension is transferred in the water heating kettle of polytetrafluoroethyllining lining of 100mL, the hydro-thermal reaction 6h at 150 DEG C, Cooled and filtered, obtained solid deionized water and dehydrated alcohol dry 6h after washing for several times under the conditions of 120 DEG C;
(3) product after drying is roasted into 16h under the conditions of 300 DEG C under oxygen atmosphere, obtains CuO-NiO composite oxides Hollow microsphere.
By CuO-NiO composite oxides hollow microsphere obtained using inductively coupled plasma atomic emission spectrometer into Row ICP test, test instrument are same as Example 1.
By ICP test result it is found that the molar ratio of Cu and Ni is about 1:1 in CuO-NiO composite oxides hollow microsphere.
Comparative example 1:
This comparative example provides a kind of preparation method of CuO hollow microsphere, the method referring to the method in embodiment 1, Difference is only that: step is added without cerous acetate in (1).
Comparative example 2:
This comparative example provides a kind of CeO2The preparation method of nanosphere, the method referring to the method in embodiment 1, Difference is only that: step is added without copper acetate in (1).
Comparative example 3:
This comparative example provides a kind of CuO-CeO2The preparation method of composite oxides, the method is referring in embodiment 1 Method, difference is only that: the additional amount of cerous acetate is 0.0159g, i.e. n in step (1)Cu:nCe=120:1, cerous acetate add It is relatively low to enter amount.
Comparative example 4:
This comparative example provides a kind of CuO-CeO2The preparation method of composite oxides, the method is referring in embodiment 1 Method, difference is only that: the additional amount of cerous acetate is 2.108g, i.e. n in step (1)Cu:nCe=1:1.1, cerous acetate add It is higher to enter amount.
Comparative example 5:
This comparative example provides a kind of CuO and CeO2Mixture, the CuO is using the method preparation in comparative example 1, institute State CeO2Using the method preparation in comparative example 2, it is 20:1 mechanical mixture that the two, which is pressed copper cerium molar ratio,.
Comparative example 6:
This comparative example provides the mixture of a kind of commercial oxidation copper and commercial oxidation cerium, and the two is by copper cerium molar ratio 20:1 mechanical mixture.
Material described in embodiment 1-5 and comparative example 1-6 is used as catalysis monochloro methane and silicon powder reaction generates dimethyl two The catalyst of chlorosilane, and evaluate the catalytic performance of above-mentioned catalyst.Catalyst performance evaluation experiment is filled using miniature fixed bed Set progress, reactor inside diameter 20cm, length 50cm, evaluation procedure is as follows: by catalyst made from 10g Si powder and 0.5g Ground and mixed forms contact;When reaction, N is used first2Then purging reaction system is switched to MeCl gas, after preheating It reacts with contact, reaction condition are as follows: preheating temperature is 350 DEG C, and reaction temperature is 325 DEG C, and reaction pressure is normal pressure, MeCl Flow velocity be 25mL/min, the reaction time be for 24 hours.
Product after reaction is collected after condensing tube condensation using toluene, and extra tail gas is absorbed with lye;The mixing of collection Quantitative analysis is carried out using gas-chromatography (Agilent 7890B, KB-210 chromatographic column, TCD detector) after liquid constant volume.
The results are shown in Table 1 for the active testing of catalyst in above-described embodiment and comparative example, wherein product distribution passes through The percentage of reaction product corresponding area calculates in gas chromatographic analysis result, the calculation formula of silicon conversion are as follows:
Wherein, W is the weight of contact.
1 catalyst activity test result table of table
As can be seen from Table 1, when using copper-base composite oxidate hollow microsphere made from embodiment 1-5 as catalyst When, catalytic activity is higher, and the selectivity of M2 reaches 86.0% or more, Si powder conversion ratio and reaches 40.0% or more, wherein M2 Selectivity up to 89.9%, silicon powder conversion ratio is up to 45.2%;And single copper oxide prepared by comparative example 1 is hollow micro- Sphere catalyst, M2 are selectively only that 70.2%, Si powder conversion ratio is 15.2%;Single cerium oxide catalyst prepared by comparative example 2 Organic silicon monomer reaction is not suitable for, without obvious catalytic activity;In comparative example 3, work as CeO2Content it is relatively low when, obtained catalysis Agent does not have multistage composite structure, in comparative example 4, works as CeO2Content it is higher when, CuO and CeO in gained catalyst2It can not shape At composite oxides, interaction between the two weakens, and therefore, the catalytic activity in above-mentioned two comparative example is lower than in embodiment The activity of catalyst;Copper oxide and cerium oxide mechanical mixture type catalyst prepared by comparative example 5, catalytic activity compare comparative example 1 Promoted, M2 be selectively 77.2%, Si powder conversion ratio be 26.8%, similarly, comparative example 6 prepare commercial oxidation copper and Commercial oxidation cerium mechanical mixture type catalyst, catalytic activity M2 are selectively also only 73.5%, Si powder conversion ratio and are only 23.2%, although showing CeO2To the promotion of CuO catalytic performance, there are facilitations, but both there is no compound in embodiment Synergistic effect between metal oxide, catalytic performance are still below the data of the embodiment of the present invention.
Above-described embodiment and comparative example the result shows that, the catalyst that method provided by the invention is prepared is in catalytic performance Aspect has significant advantage, mainly has the reason of following tripartite face: first is that hollow microsphere catalyst morphology provided by the invention, grain Diameter distribution is uniform;Second is that hollow ball catalyst structure provided by the invention is unique, hollow porous structure is conducive to reactant chloromethane The diffusion of alkane and the desorption of gaseous product;Third is that copper oxide and cerium oxide are assembled by nano unit, contact is close, phase Interreaction force is strong, and there are apparent synergistic effect, this structure greatly increases its effective contact probability between silicon powder also, To promote the raising of M2 selectivity and silicon powder conversion ratio.
The Applicant declares that the present invention is explained by the above embodiments method detailed and application of the invention, but the present invention It is not limited to above-mentioned method detailed and application, that is, does not mean that the present invention must rely on above-mentioned method detailed and application could be real It applies.It should be clear to those skilled in the art, any improvement in the present invention, to the raw materials used in the present invention, operation Addition, selection of concrete mode of equivalence replacement and auxiliary element etc., all fall within protection scope of the present invention and the open scope it It is interior.

Claims (10)

1. a kind of copper based composite metal oxidate hollow microsphere, which is characterized in that the hollow microsphere is by copper oxide shell and edge The oxide bead of metal M on shell is constituted, and the metal M is transition metal element.
2. hollow microsphere according to claim 1, which is characterized in that the metal M includes Ce, Zn, Co, Mn, Fe or Ni In any one or at least two combination;
Preferably, the molar ratio of copper and metal M are (1~100): 1, preferably (10~100): 1 in the hollow microsphere;
Preferably, the copper oxide shell is from inside to outside successively are as follows: hollow cavity, disorderly arranged nano particle, nano particle group Nanometer rods and porous nano-sheet made of dress;
Preferably, the oxide bead of the metal M is assembled by the nano particle of metal M oxide.
3. hollow microsphere according to claim 2, which is characterized in that the diameter of the hollow cavity is 1~6 μm;
Preferably, the partial size of the disorderly arranged nano particle is 20~100nm;
Preferably, the length of the nanometer rods is 100~300nm, and width is 50~150nm;
Preferably, the porous nano-sheet with a thickness of 10~100nm;
Preferably, the partial size of the oxide bead of the metal M is 100~600nm;
Preferably, the partial size of the nano particle of the metal M oxide is 5~20nm;
Preferably, the hollow microsphere is porous structure, and the partial size of the hollow microsphere is 2~8 μm.
4. the preparation method of any one of -3 hollow microspheres according to claim 1, which is characterized in that the method includes following Step:
(1) lye is added into copper presoma and metal M precursor mixed solution, obtains suspension;
(2) suspension for obtaining step (1) carries out hydro-thermal reaction, and products therefrom is separated by solid-liquid separation, and obtains solid product;
(3) the solid product calcination process for obtaining step (2), obtains copper based composite metal oxidate hollow microsphere.
5. according to the method described in claim 4, it is characterized in that, in step (1) described mixed solution, copper ion and metal M The molar ratio of ion is (1~100): 1, preferably (10~100): 1;
Preferably, in step (1) described mixed solution, the concentration of copper ion is 0.05~0.4mol/L;
Preferably, step (1) the copper presoma is soluble copper salt, and metal M presoma is soluble metal M salt;
Preferably, any one of the soluble copper salt in copper nitrate, copper acetate, copper chloride, copper sulphate or copper bromide Or at least two combination, preferably copper nitrate;
Preferably, in nitrate, acetate, chlorate, sulfate or Bromide of the soluble metal M salt selected from metal M Any one or at least two combination, the preferably nitrate of metal M.
6. method according to claim 4 or 5, which is characterized in that step (1) described lye includes sodium carbonate liquor, carbon In sour potassium solution, urea liquid or sodium hydroxide solution any one or at least two combination;
Preferably, the concentration of step (1) described lye is 0.1~4mol/L;
Preferably, the volume ratio of step (1) lye and mixed solution is 1:3~3:1;
Preferably, the adding manner of step (1) described lye is to be added dropwise;
Preferably, step (1) described lye is added under agitation;
Preferably, the rate of the stirring is 400~1200r/min.
7. according to the described in any item methods of claim 4-6, which is characterized in that the temperature of step (2) described hydro-thermal reaction is 60~180 DEG C, preferably 120 DEG C;
Preferably, the time of step (2) described hydro-thermal reaction be 0.5~for 24 hours, preferably 12h;
Preferably, step (2) described hydro-thermal reaction carries out in hydrothermal reaction kettle;
Preferably, the volume of the hydrothermal reaction kettle is 100~1000mL;
Preferably, the liner of the hydrothermal reaction kettle is polytetrafluoroethylene (PTFE).
8. according to the described in any item methods of claim 4-7, which is characterized in that after step (2) described separation of solid and liquid, washing, It is dry, obtain solid product;
Preferably, the temperature of the drying is 60~200 DEG C;
Preferably, the time of the drying is 6~20h.
9. according to the described in any item methods of claim 4-8, which is characterized in that the temperature of step (3) described roasting be 200~ 800℃;
Preferably, the time of step (3) described roasting be 2~for 24 hours.
10. the purposes of hollow microsphere according to claim 1-3, which is characterized in that the hollow microsphere is used as The catalyst of organic silicon monomer synthetic reaction;
Preferably, the hollow microsphere is used as the catalyst of dimethyldichlorosilane selectivity synthesis.
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CN109755032A (en) * 2019-02-21 2019-05-14 东南大学 A kind of more shell CuCo2O4The preparation and its application of hollow nano-sphere
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CN112295515A (en) * 2020-11-30 2021-02-02 江南大学 Preparation method of zinc oxide/cerium oxide hollow microspheres with inverted blueberry-shaped structures
CN113600213A (en) * 2021-06-21 2021-11-05 北京工商大学 Copper-based oxide/phosphide composite mesomorphic material and preparation method and application thereof
CN113600213B (en) * 2021-06-21 2022-04-22 北京工商大学 Copper-based oxide/phosphide composite mesomorphic material and preparation method and application thereof
CN115634693A (en) * 2022-09-30 2023-01-24 惠州学院 Preparation method of nano composite material with hollow tube structure and application of nano composite material in catalysis of ammonia borane alcoholysis for hydrogen production
CN115634693B (en) * 2022-09-30 2024-01-26 惠州学院 Preparation method of nanocomposite with hollow tube structure and application of nanocomposite in catalyzing aminoborane alcoholysis to produce hydrogen

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Application publication date: 20190423