CN107814407A - Method that supercritical carbon dioxide prepares ultra-thin two-dimension cuprous oxide and products thereof and application - Google Patents

Method that supercritical carbon dioxide prepares ultra-thin two-dimension cuprous oxide and products thereof and application Download PDF

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Publication number
CN107814407A
CN107814407A CN201711079782.2A CN201711079782A CN107814407A CN 107814407 A CN107814407 A CN 107814407A CN 201711079782 A CN201711079782 A CN 201711079782A CN 107814407 A CN107814407 A CN 107814407A
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China
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thin
dimension
cuprous oxide
ultra
stannous chloride
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Inventor
何丹农
徐少洪
林琳
陈超
张现
金彩虹
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Shanghai National Engineering Research Center for Nanotechnology Co Ltd
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Shanghai National Engineering Research Center for Nanotechnology Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G3/00Compounds of copper
    • C01G3/02Oxides; Hydroxides
    • 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
    • B01J23/72Copper
    • B01J35/33
    • B01J35/39
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00Crystal-structural characteristics
    • C01P2002/20Two-dimensional structures
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/50Improvements relating to the production of bulk chemicals
    • Y02P20/54Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids

Abstract

The present invention provides a kind of method that supercritical carbon dioxide prepares ultra-thin two-dimension cuprous oxide and products thereof and application, stannous chloride, enuatrol, hexamethylene tetramine and hydrazine hydrate etc., is added into distilled water, stirs.It is added into supercritical reaction kettle, controls and react certain time in certain temperature and pressure.Then calcined in Muffle furnace high temperature, product after calcining is ultrasonic in ethanol, and take supernatant liquor to centrifuge and produce ultra-thin two-dimension cuprous oxide.The ultra-thin two-dimension cuprous oxide prepared using the method for the invention, preparation process is simple, and the difficulty that layer is peeled off with layer decreases, and improves preparation efficiency, and its catalytic efficiency has compared with bulk and greatly improved, and has broad application prospects.

Description

Method that supercritical carbon dioxide prepares ultra-thin two-dimension cuprous oxide and products thereof and Using
Technical field
The invention belongs to field of nano material preparation, and in particular to a kind of supercritical carbon dioxide prepares ultra-thin two-dimension oxidation Cuprous method and products thereof and application.
Background technology
Since 21 century, coming into operation extensively for fossil energy such as oil, natural gas, the quick hair of economy has been promoted Exhibition, has promoted the progress of civilization of human society and scientific development.But this fossil energy can be closer to exhaustion in the year two thousand fifty, Therefore, the exploitation of the high-efficiency cleaning energy is to realize the important goal of energy sustainable development strategy.Utilize catalyst moisture Solar energy etc. can be converted into chemical energy by the technologies such as solution, catalysis reduction carbon dioxide, and it is close to be stored in the high-energy such as hydrogen, methane In the fuel material of degree, it has also become the important front edge of regenerative resource research field.
Two-dimensional material such as graphene receives the extensive concern of researcher as a kind of brand-new material.With it Body phase material is compared, and the specific surface area of ultra-thin thickness and super large can not only provide substantial amounts of surface atom as catalytic activity Site, for improving catalytic process and improving catalytic activity.Repaiied importantly, ultra-thin two-dimension material is easily achieved surface Decorations.Have been reported that at present, using two-dimensional material as catalytic specie, its catalytic efficiency is compared to its corresponding body phase material It is greatly improved, therefore, the developing direction for becoming one great potential of catalytic field of two-dimensional material.Two dimension is super at present The preparation of thin material include direct stripping method, indirect stripping method, high-temperature liquid-phase chemical synthesis, orientation assistant chemical synthetic method, Ultra-thin precursor process of induced chemical synthetic method, quick burning etc., these methods can synthesize various ultra-thin two-dimension materials, But due to ultra-thin materials, spacing is too small between layers, and its intermolecular attraction etc. causes its stripping relatively difficult, and layer Stripping with layer is most important step in two-dimensional ultrathin material preparation process.
Cuprous oxide cost is low, environmentally friendly, and its special conduction band positions shows its conduction band bottom than production hydrogen electricity Position -0.7V, water decomposition production hydrogen can be catalyzed for theoretical, and its light conversion efficiency can be up to 18.7%, show it in the sun The great potential of energy hydrogen manufacturing.Have been reported that at present and prepared two-dimensional ultrathin cuprous oxide, but it is peeled off still between layers It is relatively difficult, it is necessary to take a substantial amount of time.
Supercritical fluid is temperature and pressure is in more than critical point fluid, and supercritical carbon dioxide is as the most frequently used Supercritical fluid, be a kind of nontoxic, inertia and environmental sound reaction medium.Supercritical fluid has excellent dissolubility With diffusion velocity, and in the case of quick pressure releasing, its volume can rapid expanding, therefore, in commonly synthesis two-dimensional ultrathin oxygen Change in cuprous preparation process, by the way that supercritical fluid is introduced wherein, supercritical fluid is entered by its excellent dissolubility Cuprous oxide between layers, and is supportted spacing between layers greatly by the process of quick pressure releasing, and this can also reduce Its Van der Waals force between layers etc., finally reduces the difficulty peeled off between layers.Therefore, by supercritical carbon dioxide system The technology of standby nano particle, which is introduced into the preparation of two-dimensional ultrathin cuprous oxide, has technology and the novelty and creativeness of application.
The content of the invention
For the characteristics of in existing two-dimensional ultrathin cuprous oxide preparation process, hardly possible is peeled off between layers, mesh of the invention Be:A kind of method that ultra-thin two-dimension cuprous oxide is prepared using supercritical carbon dioxide is provided.
Another object of the present invention is:Ultra-thin two-dimension cuprous oxide product prepared by the above method is provided.
A further object of the present invention is:The application of the said goods is provided.
It is provided by the invention use the method that supercritical carbon dioxide prepares ultra-thin two-dimension cuprous oxide for:According to formula essence Stannous chloride, enuatrol, hexamethylene tetramine and hydrazine hydrate etc. really are weighed, is added into distilled water, stirs.Then It is added into supercritical reaction kettle, controls and react certain time in certain temperature and pressure.It is filtered dry excessively after dischargeing pressure It is dry, then calcined in Muffle furnace high temperature, product after calcining is ultrasonic in ethanol, and take supernatant liquor to centrifuge and produce ultra-thin two Tie up cuprous oxide.
Comprise the following steps that:
A kind of method that supercritical carbon dioxide prepares ultra-thin two-dimension cuprous oxide, it is characterised in that comprise the following steps that:
1)A certain amount of stannous chloride, enuatrol, hexamethylene tetramine and hydrazine hydrate are accurately weighed according to formula, is added into one In quantitative distilled water, stirring makes it fully dissolve, and wherein the mass ratio of stannous chloride and enuatrol is 1:1~20, stannous chloride Mass ratio with hexamethylene tetramine is 1:1~20, the mass ratio of stannous chloride and hydrazine hydrate is 1:1~20, stannous chloride Mass ratio with distilled water is 1:1000~10000;
2)Above-mentioned mixed solution is poured into supercritical reaction kettle, opens CO 2 high pressure pump, and raises temperature of reaction kettle, is made Reactor is maintained at 30~150 DEG C of certain 10~60MPa of pressure and temperature, react 5~24 hours in this case;
3)Open pressure relief opening and the pressure in supercritical reaction kettle is dropped into normal pressure, turbid solution is obtained, by the solution filtration washing Vacuum drying, obtained powder is then calcined into 5~30min of a period of time for 100~500 DEG C in Muffle furnace high temperature, then made It naturally cools to room temperature, by the powder after calcining in ethanol ultrasound a period of time 10~30min, take supernatant liquor centrifugation i.e. Obtain ultra-thin two-dimension cuprous oxide.
A kind of ultra-thin two-dimension cuprous oxide, it is characterised in that be prepared according to methods described.
A kind of application of ultra-thin two-dimension cuprous oxide in terms of photoelectrocatalysis.
The ultra-thin two-dimension cuprous oxide prepared using the method for the invention, preparation process is simple, reduces layer and is shelled with layer From difficulty, former preparation method needs 40~60min of ultrasound to come peel ply and layer, improves preparation efficiency, and its photoelectricity is urged Change efficiency has compared with bulk to be greatly improved, and is had great application prospect.
Embodiment
The present invention, rather than limitation the scope of the present invention are further illustrated below by embodiment.
Embodiment 1
Precise stannous chloride, enuatrol, hexamethylene tetramine and hydrazine hydrate(The mass ratio of stannous chloride and enuatrol is 1:10, the mass ratio of stannous chloride and hexamethylene tetramine is 1:10, the mass ratio of stannous chloride and hydrazine hydrate is 1:10), It is added into a certain amount of distilled water(The mass ratio of stannous chloride and distilled water is 1:3000).Stir, then added Enter in supercritical reaction kettle, control in 80 DEG C and 20MPa reaction 10h.Discharge filtration drying after pressure, the powder that then will be obtained End is in Muffle furnace high temperature(300℃)Calcining a period of time(10min), then it is naturally cooled to room temperature, after calcining Powder ultrasonic 20min in ethanol, takes supernatant liquor to centrifuge and produces ultra-thin two-dimension cuprous oxide.
Embodiment 2
Precise stannous chloride, enuatrol, hexamethylene tetramine and hydrazine hydrate(The mass ratio of stannous chloride and enuatrol is 1:15, the mass ratio of stannous chloride and hexamethylene tetramine is 1:8, the mass ratio of stannous chloride and hydrazine hydrate is 1:5), will It is added in a certain amount of distilled water(The mass ratio of stannous chloride and distilled water is 1:5000).Stir, be then added into In supercritical reaction kettle, control in 100 DEG C and 40MPa reaction 24h.Discharge filtration drying after pressure, the powder that then will be obtained End is in Muffle furnace high temperature(400℃)Calcining a period of time(8min), then it is naturally cooled to room temperature, by the powder after calcining End 25min ultrasonic in ethanol, takes supernatant liquor to centrifuge and produces ultra-thin two-dimension cuprous oxide.
Embodiment 3
Precise stannous chloride, enuatrol, hexamethylene tetramine and hydrazine hydrate(The mass ratio of stannous chloride and enuatrol is 1:20, the mass ratio of stannous chloride and hexamethylene tetramine is 1:5, the mass ratio of stannous chloride and hydrazine hydrate is 1:10), will It is added in a certain amount of distilled water(The mass ratio of stannous chloride and distilled water is 1:4000).Stir, be then added into In supercritical reaction kettle, control in 120 DEG C and 30MPa reaction 12h.Discharge filtration drying after pressure, the powder that then will be obtained End is in Muffle furnace high temperature(350℃)Calcining a period of time(15min), then it is naturally cooled to room temperature, after calcining Powder ultrasonic 15min in ethanol, takes supernatant liquor to centrifuge and produces ultra-thin two-dimension cuprous oxide.
Embodiment 4
Precise stannous chloride, enuatrol, hexamethylene tetramine and hydrazine hydrate(The mass ratio of stannous chloride and enuatrol is 1:9, the mass ratio of stannous chloride and hexamethylene tetramine is 1:12, the mass ratio of stannous chloride and hydrazine hydrate is 1:15), will It is added in a certain amount of distilled water(The mass ratio of stannous chloride and distilled water is 1:5000).Stir, be then added into In supercritical reaction kettle, control in 130 DEG C and 45MPa reaction 20h.Discharge filtration drying after pressure, the powder that then will be obtained End is in Muffle furnace high temperature(400℃)Calcining a period of time(20min), then it is naturally cooled to room temperature, after calcining Powder ultrasonic 20min in ethanol, takes supernatant liquor to centrifuge and produces ultra-thin two-dimension cuprous oxide.

Claims (4)

1. the method for preparing ultra-thin two-dimension cuprous oxide using supercritical carbon dioxide, according to formula it is accurate weigh stannous chloride, Enuatrol, hexamethylene tetramine and hydrazine hydrate, are added into distilled water, stir;Then, it is added into overcritical anti- Answer in kettle, control in 30~150 DEG C certain of temperature and 10~60MPa stress reactions;Filtration drying after pressure is discharged, then Powdered product is calcined to obtain in Muffle furnace, product after calcining is ultrasonic in ethanol, and take supernatant liquor to centrifuge and produce ultra-thin two Tie up cuprous oxide.
2. the method according to claim 1 that ultra-thin two-dimension cuprous oxide is prepared using supercritical carbon dioxide, its feature It is to comprise the following steps that:
1)A certain amount of stannous chloride, enuatrol, hexamethylene tetramine and hydrazine hydrate are accurately weighed according to formula, is added into one In quantitative distilled water, stirring makes it fully dissolve, and wherein the mass ratio of stannous chloride and enuatrol is 1:1~20, stannous chloride Mass ratio with hexamethylene tetramine is 1:1~20, the mass ratio of stannous chloride and hydrazine hydrate is 1:1~20, stannous chloride Mass ratio with distilled water is 1:1000~10000;
2)Above-mentioned mixed solution is poured into supercritical reaction kettle, opens CO 2 high pressure pump, and raises temperature of reaction kettle, is made Reactor is maintained at 30~150 DEG C of certain 10~60MPa of pressure and temperature, react 5~24 hours in this case;
3)Open pressure relief opening and the pressure in supercritical reaction kettle is dropped into normal pressure, turbid solution is obtained, by the solution filtration washing Vacuum drying, obtained powder is then calcined into 5~30min of a period of time for 100~500 DEG C in Muffle furnace high temperature, then made It naturally cools to room temperature, by the powder after calcining in ethanol ultrasound a period of time 10~30min, take supernatant liquor centrifugation i.e. Obtain ultra-thin two-dimension cuprous oxide.
3. a kind of ultra-thin two-dimension cuprous oxide, it is characterised in that method according to claim 1 or claim 2 is prepared.
4. application of the ultra-thin two-dimension cuprous oxide in terms of photoelectrocatalysis according to claim 3.
CN201711079782.2A 2017-11-06 2017-11-06 Method that supercritical carbon dioxide prepares ultra-thin two-dimension cuprous oxide and products thereof and application Pending CN107814407A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109134853A (en) * 2018-07-07 2019-01-04 盐城师范学院 A kind of preparation method of two dimension organic material
CN111482175A (en) * 2020-05-09 2020-08-04 中国科学技术大学 Preparation method of copper/cuprous oxide heterojunction nanosheet catalyst

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103274444A (en) * 2013-06-05 2013-09-04 沈阳化工大学 Preparation method for ultrafine cuprous oxide
CN104445358A (en) * 2014-11-06 2015-03-25 国核电力规划设计研究院 Cuprous oxide nano microspheres in double-layered structure and preparation method thereof
CN105645398A (en) * 2016-03-10 2016-06-08 上海大学 Method for stripping preparation of large-scale fluorinated graphene by supercritical carbon dioxide
CN106477631A (en) * 2016-10-11 2017-03-08 郑州大学 A kind of method realizing molybdenum bisuphide 2H to 1T phase in version

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103274444A (en) * 2013-06-05 2013-09-04 沈阳化工大学 Preparation method for ultrafine cuprous oxide
CN104445358A (en) * 2014-11-06 2015-03-25 国核电力规划设计研究院 Cuprous oxide nano microspheres in double-layered structure and preparation method thereof
CN105645398A (en) * 2016-03-10 2016-06-08 上海大学 Method for stripping preparation of large-scale fluorinated graphene by supercritical carbon dioxide
CN106477631A (en) * 2016-10-11 2017-03-08 郑州大学 A kind of method realizing molybdenum bisuphide 2H to 1T phase in version

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SHAN GAO,ET AL.: "Freestanding atomically-thin cuprous oxide sheets for improved visible-light photoelectrochemical water splitting", 《NANO ENERGY》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109134853A (en) * 2018-07-07 2019-01-04 盐城师范学院 A kind of preparation method of two dimension organic material
CN111482175A (en) * 2020-05-09 2020-08-04 中国科学技术大学 Preparation method of copper/cuprous oxide heterojunction nanosheet catalyst

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Application publication date: 20180320