CN115041200B - Photocatalyst for converting carbon dioxide, and preparation method and application thereof - Google Patents
Photocatalyst for converting carbon dioxide, and preparation method and application thereof Download PDFInfo
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- CN115041200B CN115041200B CN202210892359.9A CN202210892359A CN115041200B CN 115041200 B CN115041200 B CN 115041200B CN 202210892359 A CN202210892359 A CN 202210892359A CN 115041200 B CN115041200 B CN 115041200B
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 108
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 61
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 54
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- USWJSZNKYVUTIE-UHFFFAOYSA-N bis(sulfanylidene)rhenium Chemical compound S=[Re]=S USWJSZNKYVUTIE-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000002086 nanomaterial Substances 0.000 claims abstract description 37
- 239000002131 composite material Substances 0.000 claims abstract description 36
- 238000006243 chemical reaction Methods 0.000 claims abstract description 30
- 239000000758 substrate Substances 0.000 claims abstract description 6
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 24
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000011259 mixed solution Substances 0.000 claims description 15
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 13
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 11
- RNJPWBVOCUGBGY-UHFFFAOYSA-J tetraiodoplatinum Chemical compound [I-].[I-].[I-].[I-].[Pt+4] RNJPWBVOCUGBGY-UHFFFAOYSA-J 0.000 claims description 10
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 9
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 9
- XQPRBTXUXXVTKB-UHFFFAOYSA-M caesium iodide Chemical compound [I-].[Cs+] XQPRBTXUXXVTKB-UHFFFAOYSA-M 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 239000011541 reaction mixture Substances 0.000 claims description 9
- 239000008367 deionised water Substances 0.000 claims description 7
- 229910021641 deionized water Inorganic materials 0.000 claims description 7
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 claims description 7
- 229940071870 hydroiodic acid Drugs 0.000 claims description 7
- 239000003054 catalyst Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 239000012296 anti-solvent Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 12
- 238000012360 testing method Methods 0.000 description 12
- 230000001699 photocatalysis Effects 0.000 description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 9
- YLZOPXRUQYQQID-UHFFFAOYSA-N 3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]propan-1-one Chemical compound N1N=NC=2CN(CCC=21)CCC(=O)N1CCN(CC1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F YLZOPXRUQYQQID-UHFFFAOYSA-N 0.000 description 7
- 230000003197 catalytic effect Effects 0.000 description 6
- 239000000725 suspension Substances 0.000 description 6
- 238000005406 washing Methods 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- LDXJRKWFNNFDSA-UHFFFAOYSA-N 2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]ethanone Chemical compound C1CN(CC2=NNN=C21)CC(=O)N3CCN(CC3)C4=CN=C(N=C4)NCC5=CC(=CC=C5)OC(F)(F)F LDXJRKWFNNFDSA-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 150000004820 halides Chemical class 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000012188 paraffin wax Substances 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000002604 ultrasonography Methods 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 229910052792 caesium Inorganic materials 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000031700 light absorption Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- WUPHOULIZUERAE-UHFFFAOYSA-N 3-(oxolan-2-yl)propanoic acid Chemical compound OC(=O)CCC1CCCO1 WUPHOULIZUERAE-UHFFFAOYSA-N 0.000 description 1
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 229910052980 cadmium sulfide Inorganic materials 0.000 description 1
- BERDEBHAJNAUOM-UHFFFAOYSA-N copper(I) oxide Inorganic materials [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 description 1
- KRFJLUBVMFXRPN-UHFFFAOYSA-N cuprous oxide Chemical compound [O-2].[Cu+].[Cu+] KRFJLUBVMFXRPN-UHFFFAOYSA-N 0.000 description 1
- 229940112669 cuprous oxide Drugs 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- LSGOVYNHVSXFFJ-UHFFFAOYSA-N vanadate(3-) Chemical compound [O-][V]([O-])([O-])=O LSGOVYNHVSXFFJ-UHFFFAOYSA-N 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/06—Halogens; Compounds thereof
- B01J27/128—Halogens; Compounds thereof with iron group metals or platinum group metals
- B01J27/13—Platinum group metals
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/40—Carbon monoxide
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Catalysts (AREA)
Abstract
The invention relates to a photocatalyst for converting carbon dioxide, a preparation method thereof and a preparation method thereofApplication, which belongs to the technical field of carbon dioxide conversion. The invention discloses a photocatalyst for converting carbon dioxide, which is prepared by using rhenium disulfide (ReS 2 ) The nanomaterial is a growth substrate and then Cs is deposited 2 PtI 6 Grown on rhenium disulfide (ReS 2 ) Cs formed on the surface of nanomaterial 2 PtI 6 /ReS 2 The composite material can catalyze the conversion of carbon dioxide under the irradiation of visible light, and the preparation method is simple, has high repeatability, does not need complex reaction control conditions, can be used for mass production, and is beneficial to the industrial application of the photocatalyst.
Description
Technical Field
The invention belongs to the technical field of carbon dioxide conversion, and relates to a photocatalyst for converting carbon dioxide, a preparation method and application thereof.
Background
Over the last two hundred years, humans have been using fossil fuels, resulting in a proliferation of carbon dioxide levels in the atmosphere, which leads to global warming. The photocatalytic carbon dioxide conversion technology is utilized to convert carbon dioxide into chemical products such as carbon monoxide, methane, methanol and the like and fuel, so that not only can the greenhouse gas effect be relieved, but also a feasible scheme can be provided for solving the energy crisis. The photocatalytic carbon dioxide conversion technology needs to use a catalyst, the catalyst belongs to a semiconductor material, the semiconductor generates electron hole pairs by illumination, and separated electrons react with carbon dioxide adsorbed on the surface of the semiconductor, so that the conversion of the carbon dioxide is realized. Therefore, the development of high performance carbon dioxide conversion photocatalysts is particularly critical. Currently, the widely studied photocatalysts comprise titanium dioxide, cuprous oxide, g-carbon triazatetrad, cadmium sulfide, bismuth vanadate and the like, but the photocatalytic carbon dioxide conversion efficiency of the materials still cannot meet the industrial application. Therefore, it is important to find new carbon dioxide conversion photocatalyst systems.
At present, halide perovskite materials have high light absorption coefficient, wide visible light absorption range and high speedThe advantages of carrier migration, adjustable energy band structure and the like lead the catalyst to become a very promising carbon dioxide conversion photocatalytic material, wherein the halide perovskite catalytic material with the most extensive research is CsPbX 3 (x=cl, br, I). However, csPbX 3 The lead element is contained, and the risk of causing the pollution of the environment heavy metal exists. Furthermore, csPbX 3 The structural stability is poor, and the photocatalytic carbon dioxide conversion performance is seriously attenuated due to the fact that the structural stability is extremely easy to be influenced by environmental moisture.
Therefore, the development of lead-free and structurally stable halide perovskite as a carbon dioxide conversion photocatalyst has good strong application and important significance.
Disclosure of Invention
Accordingly, it is an object of the present invention to provide a photocatalyst for converting carbon dioxide; the second object of the present invention is to provide a method for preparing a photocatalyst for converting carbon dioxide; the invention further aims to provide an application of the photocatalyst for converting carbon dioxide in the aspect of converting carbon dioxide under the condition of visible light.
In order to achieve the above purpose, the present invention provides the following technical solutions:
1. a photocatalyst for converting carbon dioxide, the catalyst being rhenium disulfide (ReS 2 ) Nanomaterials and Cs 2 PtI 6 Composite material formed, wherein rhenium disulfide (ReS 2 ) Nanomaterial is a growth substrate, cs 2 PtI 6 Grown on rhenium disulfide (ReS 2 ) A nanomaterial surface.
2. The preparation method of the photocatalyst comprises the following steps:
(1) Preparation of rhenium disulfide (ReS) 2 ) Nano material: dissolving ammonium perrhenate and thiourea in deionized water, stirring and mixing to obtain a mixed solution, transferring into a hydrothermal reaction kettle for hydrothermal reaction, and cleaning and drying the product after the reaction is finished to obtain rhenium disulfide (ReS) 2 ) A nanomaterial;
(2) Preparing a photocatalyst: the rhenium disulfide (ReS) prepared in the step (1) is subjected to 2 ) Nano material as growth substrate with tetraiodidePlatinum and cesium iodide are used as raw materials, and an antisolvent method is used for preparing a catalyst composition for the reaction of rhenium disulfide (ReS 2 ) Growth of Cs on nanomaterial surfaces 2 PtI 6 Finally, the photocatalyst (Cs 2 PtI 6 /ReS 2 Composite material).
Preferably, the molar ratio of the ammonium perrhenate to the thiourea is 1:2-5.
Preferably, the molar volume ratio of the total mole number of ammonium perrhenate and thiourea to deionized water is 0.1-0.35:1, mol l.
Preferably, the hydrothermal reaction specifically includes: reacting for 18-48 h at 180-260 ℃.
Preferably, the specific method for preparing the photocatalyst comprises the following steps: the rhenium disulfide (ReS 2 ) Uniformly dispersing the nano material in a mixed solution of hydroiodic acid and dimethyl sulfoxide, adding platinum tetraiodide and cesium iodide, uniformly mixing to obtain a reaction mixture, adding dichloromethane, sealing, stirring at room temperature for 24-36 h, cleaning and drying to obtain Cs 2 PtI 6 /ReS 2 The composite material is the photocatalyst.
Further preferably, the volume ratio of the hydroiodic acid to the dimethyl sulfoxide in the mixed solution is 1:140-150;
the rhenium disulfide (ReS 2 ) The mass volume ratio of the nano material to the mixed solution is 50-200:1-2.1, mg/ml.
Further preferably, the molar ratio of the platinum tetraiodide to the cesium iodide is 1:2;
the rhenium disulfide (ReS 2 ) The mass mol ratio of the nano material to the platinum tetraiodide is 50-200:0.05-0.1, and the ratio is mg/mmol.
Further preferably, the rhenium disulfide (ReS 2 ) The mass volume ratio of the nano material to the dichloromethane is 50-200:3-6, mg/ml.
3. The application of the photocatalyst for converting carbon dioxide in converting carbon dioxide under the condition of visible light.
The invention has the beneficial effects that: the invention discloses a photocatalyst for converting carbon dioxide, which is prepared by using rhenium disulfide (ReS 2 ) Nanomaterial is grownSubstrate, then Cs 2 PtI 6 Grown on rhenium disulfide (ReS 2 ) Cs formed on the surface of nanomaterial 2 PtI 6 /ReS 2 The composite material can catalyze the conversion of carbon dioxide under the irradiation of visible light, and the preparation method is simple, has high repeatability, does not need complex reaction control conditions, can be used for mass production, and is beneficial to the industrial application of the photocatalyst.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in the following preferred detail with reference to the accompanying drawings, in which:
FIG. 1 is a carbon dioxide converting photocatalyst (Cs) prepared in example 1 2 PtI 6 /ReS 2 Composite material) EDS profile;
FIG. 2 is a carbon dioxide converting photocatalyst (Cs) prepared in example 2 2 PtI 6 /ReS 2 Composite material) X-ray photoelectron spectroscopy;
FIG. 3 shows the carbon dioxide-converting photocatalyst (Cs) prepared in example 1 and example 2 2 PtI 6 /ReS 2 Composite) effect graph of catalytic carbon dioxide conversion;
FIG. 4 is a carbon dioxide converting photocatalyst (Cs) prepared in example 3 2 PtI 6 /ReS 2 Composite material).
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present invention by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Example 1
Preparation of a carbon dioxide converting photocatalyst (Cs 2 PtI 6 /ReS 2 Composite material), comprising in particular the following steps:
(1) Preparation of rhenium disulfide (ReS) 2 ) Nano material: dissolving 2mmol ammonium perrhenate and 4mmol thiourea in 60ml deionized water, stirring and mixing to obtain a mixed solution, transferring into a 100ml hydrothermal reaction kettle for hydrothermal reaction (keeping the temperature in an oven at 240 ℃ for 24 hours), washing and filtering the product with water and alcohol after the reaction is finished, and drying at 60 ℃ to obtain rhenium disulfide (ReS) 2 ) A nanomaterial;
(2) Preparing a photocatalyst: 200mg of rhenium disulfide (ReS) prepared in step (1) 2 ) The nano material is evenly dispersed in 7 mu l of mixed solution of hydroiodic acid and 1ml of dimethyl sulfoxide, 0.05mmol of platinum tetraiodide and 0.1mmol of cesium iodide are added and evenly mixed to obtain a reaction mixture, then a small beaker with 10ml of the reaction mixture is put into a large beaker with 25ml of dichloromethane, the large beaker mouth is sealed by paraffin paper, stirring is carried out for 24 hours at room temperature, ethanol and water are used for washing and centrifugation, and Cs is obtained by drying at 60 DEG C 2 PtI 6 /ReS 2 The composite material is the photocatalyst.
FIG. 1 is a carbon dioxide converting photocatalyst (Cs) prepared in example 1 2 PtI 6 /ReS 2 Composite material), it can be seen from fig. 1 that the photocatalyst (Cs) for converting carbon dioxide 2 PtI 6 /ReS 2 Composite material) contains Cs, pt, I, re, S element, which indicates that the prepared photocatalyst is truly composed of Cs 2 PtI 6 And ReS 2 The composite material is formed.
Will be solidCarbon dioxide-converting photocatalyst (Cs) prepared in example 1 2 PtI 6 /ReS 2 Composite material) is used in a photocatalytic carbon dioxide conversion reaction, and specifically comprises the following steps:
(1) Preparing a test sample: 5mg of carbon dioxide-converting photocatalyst (Cs) 2 PtI 6 /ReS 2 Composite material) is added into 3ml of water, ultrasound is carried out for 10min to prepare a suspension, and then the prepared suspension is dropwise added into 2cm 2 Drying the square glass sheet at 60 ℃ to obtain a test sample;
(2) And (3) detecting the catalytic effect: and (3) placing the prepared test sample into a photocatalytic carbon dioxide conversion test system, and detecting the types and the yield of the products by using a gas chromatographic instrument.
Example 2
Preparation of a carbon dioxide converting photocatalyst (Cs 2 PtI 6 /ReS 2 Composite material), comprising in particular the following steps:
(1) Preparation of rhenium disulfide (ReS) 2 ) Nano material: dissolving 1mmol ammonium perrhenate and 4mmol thiourea in 60ml deionized water, stirring for 30min to obtain a mixed solution, transferring into a 100ml hydrothermal reaction kettle for hydrothermal reaction (keeping the temperature in an oven at 200 ℃ for 24 h), washing and filtering the product with water and alcohol after the reaction, and drying at 60 ℃ to obtain rhenium disulfide (ReS) 2 ) A nanomaterial;
(2) Preparing a photocatalyst: 87mg of rhenium disulfide (ReS) prepared in step (1) 2 ) The nano material is evenly dispersed in 7 mu l of mixed solution of hydroiodic acid and 1ml of dimethyl sulfoxide by stirring for 5min, 0.05mmol of platinum tetraiodide and 0.1mmol of cesium iodide are added and evenly mixed to obtain a reaction mixture, then a small beaker with 10ml of the reaction mixture is put into a large beaker with 25ml of dichloromethane, the large beaker mouth is sealed by paraffin paper, stirring is carried out for 24h at room temperature, ethanol and water are used for washing and centrifugation, and Cs is obtained by drying at 60 DEG C 2 PtI 6 /ReS 2 The composite material is the photocatalyst.
FIG. 2 is a carbon dioxide converting photocatalyst (Cs) prepared in example 2 2 PtI 6 /ReS 2 Composite material), it can be seen from fig. 2 that the carbon dioxide-converting photocatalyst (Cs) prepared in example 2 2 PtI 6 /ReS 2 Composite material) contains Cs, pt, I, re, S element, and other C and O elements are derived from adsorbed impurities.
The carbon dioxide-converting photocatalyst (Cs) prepared in example 2 was subjected to a reaction 2 PtI 6 /ReS 2 Composite material) is used in a photocatalytic carbon dioxide conversion reaction, and specifically comprises the following steps:
(1) Preparing a test sample: 5mg of carbon dioxide-converting photocatalyst (Cs) 2 PtI 6 /ReS 2 Composite material) is added into 3ml of water, ultrasound is carried out for 10min to prepare a suspension, and then the prepared suspension is dropwise added into 2cm 2 Drying the square glass sheet at 60 ℃ to obtain a test sample;
(2) And (3) detecting the catalytic effect: and (3) placing the prepared test sample into a photocatalytic carbon dioxide conversion test system, and detecting the types and the yield of the products by using a gas chromatographic instrument.
FIG. 3 shows the carbon dioxide-converting photocatalyst (Cs) prepared in example 1 and example 2 2 PtI 6 /ReS 2 Composite) effect graph of catalytic carbon dioxide conversion. As can be seen from fig. 3, the carbon dioxide-converting photocatalysts (Cs) prepared in example 1 and example 2 2 PtI 6 /ReS 2 Composite) capable of converting carbon dioxide to carbon monoxide under visible light, and the carbon dioxide-converting photocatalyst (Cs) prepared in example 1 2 PtI 6 /ReS 2 Composite) 1h carbon monoxide yield of 61.2. Mu. Mol/g; carbon dioxide-converting photocatalyst (Cs) prepared in example 2 2 PtI 6 /ReS 2 Composite) the carbon monoxide yield for 1h was 51.8. Mu. Mol/g.
Example 3
Preparation of a carbon dioxide converting photocatalyst (Cs 2 PtI 6 /ReS 2 Composite material), comprising in particular the following steps:
(1) Preparation of rhenium disulfide(ReS 2 ) Nano material: dissolving 2mmol ammonium perrhenate and 4mmol thiourea in 60ml deionized water, stirring for 30min to obtain a mixed solution, transferring into a 100ml hydrothermal reaction kettle for hydrothermal reaction (keeping the temperature in an oven at 240 ℃ for 24 h), washing and filtering the product with water and alcohol after the reaction, and drying at 60 ℃ to obtain rhenium disulfide (ReS) 2 ) A nanomaterial;
(2) Preparing a photocatalyst: 200mg of rhenium disulfide (ReS) prepared in step (1) 2 ) The nano material is evenly dispersed in a mixed solution of 14 mu l of hydroiodic acid and 2ml of dimethyl sulfoxide by stirring 5 nins, 0.1mmol of platinum tetraiodide and 0.2mmol of cesium iodide are added and evenly mixed to obtain a reaction mixture, then a small beaker with 10ml of the reaction mixture is put into a large beaker with 25ml of dichloromethane, the mouth of the large beaker is sealed by paraffin paper, the mixture is stirred for 24 hours at room temperature, the mixture is washed and centrifuged by ethanol and water, and Cs is obtained by drying at 60 DEG C 2 PtI 6 /ReS 2 The composite material is the photocatalyst.
FIG. 4 is a carbon dioxide converting photocatalyst (Cs) prepared in example 3 2 PtI 6 /ReS 2 Composite material), it can be seen from fig. 4 that the carbon dioxide-converting photocatalyst (Cs) prepared in example 3 2 PtI 6 /ReS 2 Composite material) exhibits a microspherical morphology with a porous, sheet-like structure on the surface.
The carbon dioxide-converting photocatalyst (Cs) prepared in example 4 was subjected to a reaction 2 PtI 6 /ReS 2 Composite material) is used in a photocatalytic carbon dioxide conversion reaction, and specifically comprises the following steps:
(1) Preparing a test sample: 5mg of carbon dioxide-converting photocatalyst (Cs) 2 PtI 6 /ReS 2 Composite material) is added into 3ml of water, ultrasound is carried out for 10min to prepare a suspension, and then the prepared suspension is dropwise added into 2cm 2 Drying the square glass sheet at 60 ℃ to obtain a test sample;
(2) And (3) detecting the catalytic effect: and (3) placing the prepared test sample into a photocatalytic carbon dioxide conversion test system, and detecting the types and the yield of the products by using a gas chromatographic instrument.
In summary, the present invention discloses a photocatalyst for converting carbon dioxide, which is prepared by using rhenium disulfide (ReS 2 ) The nanomaterial is a growth substrate and then Cs is deposited 2 PtI 6 Grown on rhenium disulfide (ReS 2 ) Cs formed on the surface of nanomaterial 2 PtI 6 /ReS 2 The composite material can catalyze the conversion of carbon dioxide under the irradiation of visible light, and the preparation method is simple, has high repeatability, does not need complex reaction control conditions, can be used for mass production, and is beneficial to the industrial application of the photocatalyst.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.
Claims (10)
1. A photocatalyst for converting carbon dioxide is characterized in that the catalyst is rhenium disulfide nano material and Cs 2 PtI 6 Composite material formed, wherein rhenium disulfide nanomaterial is the growth substrate, cs 2 PtI 6 Growing on the surface of rhenium disulfide nano material.
2. The method for preparing a photocatalyst as claimed in claim 1, wherein the method comprises the steps of:
(1) Preparing rhenium disulfide nano material: dissolving ammonium perrhenate and thiourea in deionized water, stirring and mixing to obtain a mixed solution, transferring the mixed solution into a hydrothermal reaction kettle for hydrothermal reaction, and cleaning and drying a product after the reaction is finished to obtain a rhenium disulfide nanomaterial;
(2) Preparing a photocatalyst: taking the rhenium disulfide nano material prepared in the step (1) as a growth substrate, and taking platinum tetraiodide and cesium iodide as raw materialsThe material grows Cs on the surface of rhenium disulfide nano material by an antisolvent method 2 PtI 6 Finally obtain Cs 2 PtI 6 /ReS 2 The composite material is the photocatalyst for converting carbon dioxide.
3. The method according to claim 2, wherein the molar ratio of ammonium perrhenate to thiourea is 1:2-5.
4. The preparation method according to claim 2, wherein the molar volume ratio of the total mole number of ammonium perrhenate and thiourea to deionized water is 0.1-0.35:1, mol:l.
5. The preparation method according to claim 2, wherein the hydrothermal reaction is specifically: reacting for 18-48 h at 180-260 ℃.
6. The preparation method according to claim 2, wherein the specific method for preparing the photocatalyst comprises the following steps:
uniformly dispersing the rhenium disulfide nano material in a mixed solution of hydroiodic acid and dimethyl sulfoxide, adding platinum tetraiodide and cesium iodide, uniformly mixing to obtain a reaction mixture, placing a container filled with the reaction mixture into a container containing dichloromethane, sealing the container containing dichloromethane, stirring at room temperature for 24-36 h, cleaning and drying to obtain Cs 2 PtI 6 /ReS 2 The composite material is the photocatalyst.
7. The preparation method according to claim 6, wherein the volume ratio of the hydroiodic acid to the dimethyl sulfoxide in the mixed solution is 1:140-150;
the mass volume ratio of the rhenium disulfide nano material to the mixed solution is 50-200:1-2.1, and the ratio is mg/ml.
8. The method of claim 6, wherein the molar ratio of platinum tetraiodide to cesium iodide is 1:2; the mass molar ratio of the rhenium disulfide nano material to the platinum tetraiodide is 50-200:0.05-0.1, and the ratio is mg/mmol.
9. The preparation method of claim 6, wherein the mass to volume ratio of the rhenium disulfide nanomaterial to the dichloromethane is 50-200:3-6, mg:ml.
10. Use of the photocatalyst for converting carbon dioxide according to claim 1 for converting carbon dioxide under visible light conditions.
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