CN107519899A - A kind of selenizing cobalt catalyst and its preparation method and application - Google Patents

A kind of selenizing cobalt catalyst and its preparation method and application Download PDF

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Publication number
CN107519899A
CN107519899A CN201710942312.8A CN201710942312A CN107519899A CN 107519899 A CN107519899 A CN 107519899A CN 201710942312 A CN201710942312 A CN 201710942312A CN 107519899 A CN107519899 A CN 107519899A
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cobalt
selenizing
preparation
cobalt catalyst
source
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CN107519899B (en
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潘宝
王传义
马养民
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Jiangsu Wanshengda Environmental Protection Technology Co ltd
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Shaanxi University of Science and Technology
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J27/00Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • B01J27/02Sulfur, selenium or tellurium; Compounds thereof
    • B01J27/057Selenium or tellurium; Compounds thereof
    • B01J27/0573Selenium; Compounds thereof
    • B01J35/23
    • B01J35/30
    • B01J35/39
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/08Heat treatment
    • B01J37/10Heat treatment in the presence of water, e.g. steam
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B3/00Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
    • C01B3/02Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
    • C01B3/06Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of inorganic compounds containing electro-positively bound hydrogen, e.g. water, acids, bases, ammonia, with inorganic reducing agents
    • 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
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/36Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
    • 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
    • Y02P20/10Process efficiency
    • Y02P20/133Renewable energy sources, e.g. sunlight

Abstract

The invention provides a kind of co-catalyst Co0.85Se and its preparation method and application, belong to photocatalysis field.The co-catalyst of the present invention is nano lamellar material by solvent structure, material fusion transition metal ions to the bigger serface of the transmission performance of electronics and two-dimensional material, high activity exposure than the advantages that, can efficiently promote photocatalysis CO2The performance of reduction reaction.Its preparation method is simple and easy, reaction system mild condition, and CO is being realized using solar energy2Fixation and conversion etc. have broad application prospects.

Description

A kind of selenizing cobalt catalyst and its preparation method and application
Technical field
The invention belongs to new material to prepare the technical field with photocatalysis carbon dioxide reduction, and in particular to a kind of selenizing Cobalt catalyst and its preparation method and application.
Background technology
With the getting worse of the environmental problems such as energy crisis and greenhouse effects, the Faced In Sustainable Development of human society is huge How big challenge, effectively utilize solar energy to realize the fixation of carbon dioxide and convert oneself and cause the extensive pass of countries in the world Note.
Using photocatalysis technology, by CO2More valuable industrial chemicals is converted into, such as CO, CH4、CH3OH, HCHO and HCOOH etc., it can not only realize to CO2Fixation, alleviate greenhouse effects to a certain extent, can also be provided for the mankind important Industrial chemicals.Therefore, realized by photocatalysis technology to CO2Conversion be a great attractability and challenge problem. But current photocatalysis CO2Reduction reaction efficiency is low, greatly constrains its practical application, and it is considered as that one kind carries to introduce co-catalyst High photocatalysis CO2The effective means of reduction efficiency, thus the successful exploitation design of new and effective co-catalyst is to utilize solar energy Realize CO2One of fixed and conversion key technology.
The content of the invention
It is an object of the invention to provide a kind of co-catalyst Co0.85Se and its preparation method and application, preparation method letter It is single easy, gentle using the cheap simplicity of equipment, synthesis condition, suitable for industrialization development, be advantageous to promote;Applied to visible ray It is catalyzed CO2Reduction, can efficiently promote CO2The performance of photo catalytic reduction reaction.
To achieve the above object, the present invention adopts the following technical scheme that:
A kind of preparation method of selenizing cobalt catalyst, it is characterised in that comprise the following steps that:
Step(One)Cobalt source compound is dissolved in solvent and obtains cobalt source solution, selenium source compound is dissolved in solvent selenium source is made Solution;
Step(Two)Selenium source solution is added dropwise while stirring in the cobalt source solution, continues stirring after dripping 30 ~ 180 minutes, Move into again in autoclave, constant temperature 12 ~ 24 hours at a temperature of 90 ~ 240 DEG C, gained sediment water and ethanol centrifugation are washed Wash to total ion concentration<10ppm, then dried 6 ~ 24 hours at 40 ~ 120 DEG C, grinding, obtain selenizing cobalt catalyst powder.
The step(One)In cobalt source compound using cobalt chloride, cobalt acetate, cobalt nitrate, one kind in cobaltous sulfate.
The step(One)In selenium source compound using sodium selenate, one kind in potassium selenate.
The step(One)In solvent using deionized water, one or both of diethylenetriamines.
The cobalt source solution concentration is 0.1 ~ 1 mol/L, and selenium source solution concentration is 0.1 ~ 1 mol/L;The cobalt source solution It is 1 ~ 3: 1 with the mol ratio of selenium source and cobalt source in selenium source solution.
The chemical formula of selenizing cobalt catalyst is Co made from preparation method as mentioned0.85Se。
Selenizing cobalt catalyst made from preparation method is in visible light catalytic CO as mentioned2Application in reduction system.
In visible light catalytic CO2In reduction system, described system is the batch (-type) photocatalysis CO2 reduction reactions under normal pressure System, with bipyridyl ruthenium complex [Ru (bpy)3]Cl2•6H2O is used as electronics sacrifice as visible light photosensitizer using triethanolamine Agent, solvent is used as using the mixed solution of acetonitrile or acetonitrile and water.
Described Co0.85Se dosage is the 1 ~ 15% of sensitising agent quality.
Described photocatalysis CO2The reaction temperature of reduction system is 10 ~ 60 DEG C, and the reaction time is 15 ~ 180min.
Compared with prior art, beneficial effects of the present invention:
(1)The present invention is applied to photocatalysis field using cobaltous selenide as co-catalyst first, can effectively improve photocatalysis CO2Also Former reaction efficiency;
(2)The co-catalyst cobaltous selenide preparation method of the present invention is simple and easy, it is not necessary to equipment, the synthesis condition temperature of complex and expensive Be advantageous to promote on a large scale;
(3)The reaction system of the present invention is simple and easy, and auxiliary dosage is few, and green pollution is few, economizes on resources and reaction condition Gently, be advantageous in CO2Popularization and application in technique for fixing.
Brief description of the drawings
Fig. 1 is Co in the embodiment of the present invention 10.85Se X-ray diffractogram;
Fig. 2 is Co in the embodiment of the present invention 10.85Se scanning electron microscope (SEM) photograph;
Fig. 3 is Co in the embodiment of the present invention 10.85Photocatalysis COs of the Se as co-catalyst2Reducing activity figure.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to Limit the present invention.
The present invention provides a kind of preparation method of selenizing cobalt catalyst, and concrete scheme is as follows:
Step(One)Cobalt source compound is dissolved in solvent and obtains cobalt source solution, selenium source compound is dissolved in solvent selenium source is made Solution;
Step(Two)Selenium source solution is added dropwise while stirring in the cobalt source solution, continues stirring after dripping 30 ~ 180 minutes, Move into again in autoclave, constant temperature 12 ~ 24 hours at a temperature of 90 ~ 240 DEG C, gained sediment water and ethanol centrifugation are washed Wash to total ion concentration<10ppm, then dried 6 ~ 24 hours at 40 ~ 120 DEG C, grinding, obtain selenizing cobalt catalyst powder.
The step(One)In cobalt source compound using cobalt chloride, cobalt acetate, cobalt nitrate, one kind in cobaltous sulfate.
The step(One)In selenium source compound using sodium selenate, one kind in potassium selenate.
The step(One)In solvent using deionized water, one or both of diethylenetriamines.
The cobalt source solution concentration is 0.1 ~ 1 mol/L, and selenium source solution concentration is 0.1 ~ 1 mol/L;The cobalt source solution It is 1 ~ 3: 1 with the mol ratio of selenium source and cobalt source in selenium source solution.
A kind of selenizing cobalt catalyst, the chemical formula of selenizing cobalt catalyst is Co0.85Se。
A kind of application of selenizing cobalt catalyst, selenizing cobalt catalyst is in visible light catalytic CO2Answering in reduction system With.
In visible light catalytic CO2In reduction system, described system is the batch (-type) photocatalysis CO under normal pressure2Reduction reaction System, with bipyridyl ruthenium complex [Ru (bpy)3]Cl2•6H2O is used as electronics sacrifice as visible light photosensitizer using triethanolamine Agent, solvent is used as using the mixed solution of acetonitrile or acetonitrile and water.
Described Co0.85Se dosage is the 1 ~ 15% of sensitising agent quality.
Described photocatalysis CO2The reaction temperature of reduction system is 10 ~ 60 DEG C, and the reaction time is 15 ~ 180min.
Embodiment 1
Weigh 0.249 g Co (Ac)2·H2O and 0.173 g Na2SeO340 mL diethylenetriamines are dissolved in respectively(DETA)With Deionized water(H2O)Mixed solution (VH2O:VDETA=2:1) in, by Na2SeO3Solution is slowly dropped into Co (Ac)2·H2O solution In, continue to stir 30 min, be transferred to 180 DEG C of h of hydro-thermal 16 in 100 mL autoclaves, be cooled to room temperature, centrifuge washing, 80 DEG C of 12 h of vacuum drying, obtain Co0.85Se;
Fig. 1 is the X-ray diffractogram that the present embodiment prepares material, from figure 1 it appears that the sample prepared is hexagonal crystal phase Co0.85Se(JCPDS:52-1008).
Fig. 2 is that embodiment 1 prepares Co0.85The scanning electron microscope (SEM) photograph of Se samples, as can be seen from Figure 2 sample present nano lamellar Pattern.
By obtained Co0.85Se materials are used for photo catalytic reduction CO as co-catalyst2, reaction is homemade normal at one Carried out in pressure intermittent reaction device, using 300W xenon lamps as light source(Add 420 nm optical filter), reaction system passes through Circulating condensing water management temperature weighs 0.1 mg Co at 20 DEG C0.85Se co-catalysts and 8 mg bipyridyl ruthenium complexs([Ru (bpy)3]Cl2·6H2O)Then sensitising agent adds 3 mL water, 2 mL acetonitriles, 1 mL triethanolamines in reactor, stirring is equal It is even.System is vacuumized with mechanical pump, is then charged with high-purity CO2Gas, reaction of turning on light after the min of adsorption equilibrium 30.Reaction generation Gas-phase product analyzed by gas chromatographic detection.
Fig. 3 is that embodiment 1 prepares sample for photo catalytic reduction CO2Photocatalysis CO in system2The activity figure of reduction, Under the system, main reduzate is CO and H2, by illumination in 2 hours, CO and H2Yield respectively reaches 36.0 μm of ol and 9.4 μ mol。
Table 1 is Co in the embodiment of the present invention 10.85Photocatalysis COs of the Se as co-catalyst2Reduction reaction blank control is tested As a result.
Reaction condition CO/μmol H2/μmol CO+H2/μmol
Normal reaction 36.0 9.4 45.4
No light -- -- --
Without [Ru(bpy)3]Cl2·6H2O -- -- --
Without Co0.85Se 1.6 1.8 3.4
N2Instead of CO2 -- 1.2 1.2
From table 1 it follows that the reaction system is the CO of visible optical drive2Reduction system, co-catalyst Co0.85Se's Introducing substantially increases CO2The efficiency of reduction reaction.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.

Claims (10)

1. a kind of preparation method of selenizing cobalt catalyst, it is characterised in that comprise the following steps that:
Step(One)Cobalt source compound is dissolved in solvent and obtains cobalt source solution, selenium source compound is dissolved in solvent selenium source is made Solution;
Step(Two)Selenium source solution is added dropwise while stirring in the cobalt source solution, continues stirring after dripping 30 ~ 180 minutes, Move into again in autoclave, constant temperature 12 ~ 24 hours at a temperature of 90 ~ 240 DEG C, gained sediment water and ethanol centrifugation are washed Wash to total ion concentration<10ppm, then dried 6 ~ 24 hours at 40 ~ 120 DEG C, grinding, obtain selenizing cobalt catalyst powder.
2. the preparation method of selenizing cobalt catalyst according to claim 1, it is characterised in that:
The step(One)In cobalt source compound using cobalt chloride, cobalt acetate, cobalt nitrate, one kind in cobaltous sulfate.
3. the preparation method of selenizing cobalt catalyst according to claim 1 or 2, it is characterised in that:
The step(One)In selenium source compound using sodium selenate, one kind in potassium selenate.
4. the preparation method of selenizing cobalt catalyst according to claim 3, it is characterised in that:
The step(One)In solvent using deionized water, one or both of diethylenetriamines.
5. the preparation method of selenizing cobalt catalyst according to claim 4, it is characterised in that:
The cobalt source solution concentration is 0.1 ~ 1 mol/L, and selenium source solution concentration is 0.1 ~ 1 mol/L;The cobalt source solution and selenium The mol ratio of selenium source and cobalt source is 1 ~ 3: 1 in the solution of source.
A kind of 6. selenizing cobalt catalyst, it is characterised in that:Preparation method as described in any one in claim 1-5 is made The chemical formula of selenizing cobalt catalyst be Co0.85Se。
A kind of 7. application of selenizing cobalt catalyst, it is characterised in that:Preparation side as described in any one in claim 1-5 Selenizing cobalt catalyst is in visible light catalytic CO made from method2Application in reduction system.
8. the application of selenizing cobalt catalyst according to claim 7, it is characterised in that:In visible light catalytic CO2Reduction Body In system, described system is the batch (-type) photocatalysis CO2 reduction reaction systems under normal pressure, with bipyridyl ruthenium complex [Ru (bpy)3]Cl2•6H2O is as visible light photosensitizer, using triethanolamine as electronics sacrifice agent, with the mixed of acetonitrile or acetonitrile and water Solution is closed as solvent.
9. the application of selenizing cobalt catalyst according to claim 8, it is characterised in that:Described Co0.85Se dosage is The 1 ~ 15% of sensitising agent quality.
10. the application of selenizing cobalt catalyst according to claim 8 or claim 9, it is characterised in that:Described photocatalysis CO2Also The reaction temperature of substance system is 10 ~ 60 DEG C, and the reaction time is 15 ~ 180min.
CN201710942312.8A 2017-10-11 2017-10-11 Cobalt selenide cocatalyst, and preparation method and application thereof Active CN107519899B (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107999094A (en) * 2017-12-29 2018-05-08 郑州大学 A kind of metal phase tungsten selenide nanometer sheet/carbon nano-tube hybridization structure elctro-catalyst and preparation method thereof
CN107999093A (en) * 2017-12-29 2018-05-08 郑州大学 A kind of cobalt doped two dimension tungsten selenide elctro-catalyst and preparation method thereof
CN109400898A (en) * 2018-10-25 2019-03-01 陕西科技大学 A kind of manganese coordination polymer and its preparation method and application
CN109569659A (en) * 2019-01-07 2019-04-05 福州大学 A kind of photocatalysis auxiliary agent and preparation method thereof restoring carbon dioxide
CN111905771A (en) * 2020-08-12 2020-11-10 西安理工大学 Preparation method of catalyst for modifying cuprous oxide with different crystal faces by selenium
CN113145138A (en) * 2021-03-11 2021-07-23 福州大学 Thermal response type composite photocatalyst and preparation method and application thereof
CN113593918A (en) * 2021-07-27 2021-11-02 陕西君普新航科技有限公司 Lamellar CoxSelf-assembly preparation method of Se nanosheet array solar cell electrode
CN115624980A (en) * 2022-12-26 2023-01-20 四川大学 Metal selenium-based biocatalysis material and preparation method and application thereof

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107999094A (en) * 2017-12-29 2018-05-08 郑州大学 A kind of metal phase tungsten selenide nanometer sheet/carbon nano-tube hybridization structure elctro-catalyst and preparation method thereof
CN107999093A (en) * 2017-12-29 2018-05-08 郑州大学 A kind of cobalt doped two dimension tungsten selenide elctro-catalyst and preparation method thereof
CN109400898A (en) * 2018-10-25 2019-03-01 陕西科技大学 A kind of manganese coordination polymer and its preparation method and application
CN109400898B (en) * 2018-10-25 2021-05-18 陕西科技大学 Manganese coordination polymer and preparation method and application thereof
CN109569659A (en) * 2019-01-07 2019-04-05 福州大学 A kind of photocatalysis auxiliary agent and preparation method thereof restoring carbon dioxide
CN109569659B (en) * 2019-01-07 2021-04-27 福州大学 Photocatalytic auxiliary agent for reducing carbon dioxide and preparation method thereof
CN111905771A (en) * 2020-08-12 2020-11-10 西安理工大学 Preparation method of catalyst for modifying cuprous oxide with different crystal faces by selenium
CN113145138A (en) * 2021-03-11 2021-07-23 福州大学 Thermal response type composite photocatalyst and preparation method and application thereof
CN113593918A (en) * 2021-07-27 2021-11-02 陕西君普新航科技有限公司 Lamellar CoxSelf-assembly preparation method of Se nanosheet array solar cell electrode
CN115624980A (en) * 2022-12-26 2023-01-20 四川大学 Metal selenium-based biocatalysis material and preparation method and application thereof

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