CN106582762A - Nitrogen-doped graphene/MnO2 composite material and preparation method thereof - Google Patents
Nitrogen-doped graphene/MnO2 composite material and preparation method thereof Download PDFInfo
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- CN106582762A CN106582762A CN201611151488.3A CN201611151488A CN106582762A CN 106582762 A CN106582762 A CN 106582762A CN 201611151488 A CN201611151488 A CN 201611151488A CN 106582762 A CN106582762 A CN 106582762A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 66
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 239000002131 composite material Substances 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 150000001875 compounds Chemical class 0.000 claims abstract description 22
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000011572 manganese Substances 0.000 claims abstract description 18
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 18
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims abstract description 16
- 239000000243 solution Substances 0.000 claims description 27
- UOGMEBQRZBEZQT-UHFFFAOYSA-L manganese(2+);diacetate Chemical compound [Mn+2].CC([O-])=O.CC([O-])=O UOGMEBQRZBEZQT-UHFFFAOYSA-L 0.000 claims description 16
- 229940071125 manganese acetate Drugs 0.000 claims description 15
- 230000036571 hydration Effects 0.000 claims description 4
- 238000006703 hydration reaction Methods 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 4
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 3
- 241000446313 Lamella Species 0.000 claims 1
- 230000003197 catalytic effect Effects 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 8
- 239000000203 mixture Substances 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 12
- 239000002070 nanowire Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- 150000001336 alkenes Chemical class 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- -1 graphite Alkene Chemical class 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 125000004433 nitrogen atom Chemical group N* 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- XMWRBQBLMFGWIX-UHFFFAOYSA-N C60 fullerene Chemical compound C12=C3C(C4=C56)=C7C8=C5C5=C9C%10=C6C6=C4C1=C1C4=C6C6=C%10C%10=C9C9=C%11C5=C8C5=C8C7=C3C3=C7C2=C1C1=C2C4=C6C4=C%10C6=C9C9=C%11C5=C5C8=C3C3=C7C1=C1C2=C4C6=C2C9=C5C3=C12 XMWRBQBLMFGWIX-UHFFFAOYSA-N 0.000 description 1
- 229910016978 MnOx Inorganic materials 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 206010070834 Sensitisation Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910003472 fullerene Inorganic materials 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000012456 homogeneous solution Substances 0.000 description 1
- 229940099596 manganese sulfate Drugs 0.000 description 1
- 235000007079 manganese sulphate Nutrition 0.000 description 1
- 239000011702 manganese sulphate Substances 0.000 description 1
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 description 1
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 description 1
- 229910000357 manganese(II) sulfate Inorganic materials 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- 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
- B01J27/24—Nitrogen compounds
-
- B01J35/615—
Abstract
The invention provides a nitrogen-doped graphene/MnO2 composite material and a preparation method thereof. The preparation method comprises the following steps: mixing a manganese source compound solution and a graphene oxide solution; then adding ammonium persulfate in the mixture; and carrying out heating reaction to obtain the nitrogen-doped graphene/MnO2 composite material. By the method, reduction of graphene oxide can be realized by one step, MnO2 in the obtained nitrogen-atom-doped and MnO2-loaded composite material is linear, the specific surface area of the MnO2 in the composite material is increased, and therefore, the catalytic activity of the obtained composite material is greatly enhanced.
Description
Technical field
Technical field of nano material of the present invention, more particularly to a kind of nitrogen-doped graphene/MnO2Composite and its preparation
Method.
Background technology
The basic structural unit of Graphene is the hexatomic ring of most rock-steady structure, and itself and fullerene and CNT phase
Than, not only low price, raw material is easy to get, and light weight, and preferable specific surface area is big, and heat conductivity is good, is current preferable two wiener
Rice material, shows wide application prospect in research fields such as microelectronics, functional material and chemical sensitisations.
Nitrogen-doped graphene load complex is one of numerous research fields of Graphene, receives greatly pass in recent years
Note, and nitrogen-doped graphene is introduced in metal-oxide, the catalytic performance of metal-oxide can be improved, at present with regard to metal
Oxide introduces nitrogen-doped graphene report and also compares many, such as Applied Surface Science, 366 (2016), 552-
MnOx disclosed in 560 and nitrogen-doped graphene composite, and for example ACS Appl.Mater.Interfaces 2016,8,
5251-5260 also discloses that MnO2With nitrogen-doped graphene composite；But presently disclosed nitrogen-doped graphene/MnO2It is multiple
In condensation material, manganese dioxide is granule or lamellar, and its catalytic performance is poor, has had a strong impact on its application, and disclosed preparation
The method technique of composite is also comparatively laborious, it thus provides a kind of good nitrogen-doped graphene/MnO of catalytic performance2It is compound
Material tool has very important significance.
The content of the invention
In view of this, the technical problem to be solved is to provide a kind of nitrogen-doped graphene/MnO2Composite wood
Material and preparation method thereof, the composite catalytic performance prepared by the method that the present invention is provided are good, and preparation method is simple.
Present invention also offers a kind of nitrogen-doped graphene/MnO2Composite, it is described to be compounded in nitrogen-doped graphene piece
MnO on layer2For wire MnO2, wire MnO210～20nm of diameter.
Present invention also offers a kind of nitrogen-doped graphene/MnO2The preparation method of composite, including：
1) manganese source compound solution and graphene oxide solution are mixed, obtain the first mixed liquor,
The manganese source compound is hydration manganese acetate；
2) Ammonium persulfate. is added in the first mixed solution, under the conditions of 80～200 DEG C, 1～36h of hydro-thermal reaction, obtains nitrogen
Doped graphene/MnO2Composite.
Preferably, the graphene oxide and the mass ratio of manganese source compound are 1: (5～30).
Preferably, the concentration of the graphene oxide solution is 2～3.5g/L.
Preferably, the concentration of the manganese source compound solution is 5～100g/L.
Preferably, the manganese acetate is with the Ammonium persulfate. mass ratio 1: (2-10).
Preferably, the concentration of the ammonium persulfate solution is 10～100g/L.
Compared with prior art, the invention provides a kind of nitrogen-doped graphene/MnO2Composite and preparation method thereof,
The method that the present invention is provided can a step realize the reduction of graphene oxide, nitrogen atom doping and MnO2Load；In MnO2Generate
Process, the oxygen-containing functional group on graphene oxide make MnO as nucleating point2Nucleation simultaneously axially grows, and obtain it is compound
MnO in material2For MnO2Nano wire, so increase its specific surface area in the composite (specific surface area 100～
200m2/ g, be not used graphene oxide less than 50m2/ g) so that the catalysis activity of the composite for obtaining is greatly enhanced.
Description of the drawings
Fig. 1 is nitrogen-doped graphene/MnO that the embodiment of the present invention 1 is prepared2Composite amplifies 2K times of scanning electricity
Mirror figure；
Fig. 2 is nitrogen-doped graphene/MnO that the embodiment of the present invention 1 is prepared2Composite amplifies 3K times of scanning electricity
Mirror figure；
Fig. 3 is nitrogen-doped graphene/MnO prepared by comparative example 12Composite scanning electron microscope (SEM) photograph；
Fig. 4 is nitrogen-doped graphene/MnO prepared by the embodiment of the present invention 1～3 and comparative example 1,22The electricity of composite
Chemical data；
Fig. 5 is nitrogen-doped graphene/MnO prepared by this comparative example 22The scanning electron microscope (SEM) photograph of composite.
Specific embodiment
The invention provides a kind of nitrogen-doped graphene/MnO2Composite, it is characterised in that described to be compounded in N doping
MnO on graphene sheet layer2For wire MnO2, wire MnO210～20nm of diameter；Wire MnO2Specific surface area
100～200m2/g。
Present invention also offers a kind of nitrogen-doped graphene/MnO2The preparation method of composite, including：
1) manganese source compound solution and graphene oxide solution are mixed, obtain the first mixed liquor,
The manganese source compound is hydration manganese acetate；
2) Ammonium persulfate. is added in the first mixed solution, under the conditions of 80～200 DEG C, 1～36h of hydro-thermal reaction, obtains nitrogen
Doped graphene/MnO2Composite.
According to the present invention, manganese source compound solution and graphene oxide solution are mixed by the present invention, obtain the first mixed liquor；
Wherein, the manganese source compound is preferably four hydration manganese acetates；The manganese source compound solution is preferably the water of manganese source compound
Solution；The concentration of the manganese source compound solution is preferably 5～100g/L, more preferably 10～40g/L；The graphene oxide
Solution is preferably graphene oxide water solution；The concentration of the graphene oxide solution is preferably 2～3.5mg/mL, more preferably
2.5～3mg/mL；The graphene oxide is 1 with the mass ratio of manganese source compound：(5～30).Mode of the present invention to mixing
Without particular/special requirement, raw material mix homogeneously is made.
According to the present invention, the present invention adds Ammonium persulfate. in the first mixed solution, and under the conditions of 80～200 DEG C, hydro-thermal is anti-
1～36h is answered, nitrogen-doped graphene/MnO is obtained2Composite；；Wherein, the concentration of the ammonium persulfate solution be preferably 10～
100g/L, more preferably 30～80g/L, most preferably 50～60g/L；The manganese acetate is preferred with the Ammonium persulfate. mass ratio
For 1: (2-10)；The temperature of the reacting by heating is preferably 80～200 DEG C, more preferably 120～160 DEG C, the reacting by heating
Time be preferably 1～36h, more preferably 10～16 hours, more preferably 12～14 hours.
Nitrogen-doped graphene/MnO that the present invention is provided2The preparation method of composite can not only step realization oxidation stone
The reduction of black alkene, nitrogen atom doping and MnO2Load, and the MnO in the composite for obtaining2For wire, and then increase which
Specific surface area in the composite, so as to get the catalysis activity of composite greatly enhance.
It is clearly and completely described below in conjunction with the technical scheme of the embodiment of the present invention, it is clear that described enforcement
Example is only a part of embodiment of the invention, rather than the embodiment of whole.Based on the embodiment in the present invention, this area is common
The every other embodiment obtained under the premise of creative work is not made by technical staff, belongs to the model of present invention protection
Enclose.
Embodiment 1
The graphene oxide water solution and concentration for selecting concentration to be 2.5g/L is 50g/L manganese acetate aqueous solutions, according to oxidation
Graphene is mixed homogeneously with manganese acetate mass ratio 1: 15, adds 100g/L over cure with Ammonium persulfate. mass ratio 1: 3 according to manganese acetate
Acid ammonium solution, then reacting 12 hours at a temperature of mixture under hydrothermal conditions 120 DEG C, by the product deionized water for obtaining
Washing is for several times until the PH of clear liquid is neutral；Finally by it is the product for having washed cold it is dry obtain end product, that is, obtain N doping graphite
Alkene/MnO2Composite.
The pattern of the composite to obtaining detects, as a result sees Fig. 1～Fig. 2, wherein, Fig. 1 is the embodiment of the present invention 1
Nitrogen-doped graphene/the MnO for preparing2Composite amplifies 2K times of scanning electron microscope (SEM) photograph；Fig. 2 is made for the embodiment of the present invention 1
Standby nitrogen-doped graphene/the MnO for obtaining2Composite amplifies 3k times of scanning electron microscope (SEM) photograph.It can be seen that present invention system
MnO in the standby composite for obtaining2Nano wire mutually winds and is staggered into porous similar to bladed structure, and nanowire diameter is 10
～20nm.Fig. 4 is nitrogen-doped graphene/MnO prepared by the embodiment of the present invention 1～3 and comparative example 1,22The electricity of composite
Chemical data, by disk electrode test it can be seen that the complex that embodiment 2 is obtained has preferable hydrogen reduction catalytic performance：Rise
Beginning current potential is 0.01V, and half wave potential -0.128V electric currents are 1.16mA.
Embodiment 2
The graphene oxide water solution and concentration that concentration is 2g/L is selected to be 80g/L manganese acetate aqueous solutions, according to oxidation stone
Black alkene is mixed homogeneously with manganese acetate mass ratio 1: 25, adds 50g/L Ammonium persulfate. with Ammonium persulfate. mass ratio 1: 8 according to manganese acetate
Solution, then reacting 36 hours at a temperature of mixture under hydrothermal conditions 140 DEG C, the product for obtaining is washed with deionized
For several times until the PH of clear liquid is neutral；Finally by it is the product for having washed cold it is dry obtain end product, that is, obtain nitrogen-doped graphene/
MnO2Composite.
The pattern of the composite to obtaining detects, MnO in composite2Nano wire mutually winds and is staggered into porous
Similar to bladed structure, nanowire diameter is 10～20nm.By disk electrode test it can be seen that the answering of obtaining of embodiment 1
Compound has best hydrogen reduction catalytic performance：Take-off potential is 0.005V, and half wave potential -0.156V electric currents are 1.1mA.
Embodiment 3
The graphene oxide water solution and concentration that concentration is 3g/L is selected to be 25g/L manganese acetate aqueous solutions, according to oxidation stone
Black alkene is mixed homogeneously with manganese acetate mass ratio 1: 7, adds 30g/L Ammonium persulfate. with Ammonium persulfate. mass ratio 1: 5 according to manganese acetate
Solution, then reacting 24 hours at a temperature of mixture under hydrothermal conditions 160 DEG C, the product for obtaining is washed with deionized
For several times until the PH of clear liquid is neutral；Finally by it is the product for having washed cold it is dry obtain end product, that is, obtain nitrogen-doped graphene/
MnO2 composites.
The pattern of the composite to obtaining detects, MnO in composite2Nano wire mutually winds and is staggered into porous
Similar to bladed structure, nanowire diameter is 10～20nm.By disk electrode test it can be seen that the answering of obtaining of embodiment 1
Compound has preferable hydrogen reduction catalytic performance：Take-off potential is -0.015V, and half wave potential -0.18V electric currents are 1.08mA.
Comparative example 1
According to Applied Surface Science, 366 (2016), 552-560, the method for report prepare nitrogen and mix
Miscellaneous Graphene/MnO2Composite, preparation flow：1, at 120 DEG C, the uniform mixed liquor of hydrothermal oxidization Graphene and ammonia, obtains
To the Graphene of N doping；2,50mg ultrasounds uniform NRGO is added to into 0.25M MnSO4With 0.5M KBrO3Homogeneous solution,
Then power density is carried out for 480W cm-2It is 24KHz radioreactions with frequency.
Composite pattern to obtaining detects, as a result sees that Fig. 3, Fig. 3 prepare N doping graphite for comparative example 1
Alkene/MnO2The scanning electron microscope (SEM) photograph of composite.Fig. 4 is N doping stone prepared by the embodiment of the present invention 1～3 and comparative example 1,2
Black alkene/MnO2The electrochemical data of composite, by disk electrode test it can be seen that the complex that obtains of comparative example 1 have compared with
Poor hydrogen reduction catalytic performance (negative take-off potential, half wave potential and little electric current).
Comparative example 2
According to the preparation method of embodiment 1, only manganese source compound is changed into manganese nitrate or manganese sulfate, obtain N doping graphite
Alkene/MnO2Composite；
Composite pattern to obtaining detects that it is multiple that Fig. 5 prepares nitrogen-doped graphene/MnO2 for comparative example 2
The scanning electron microscope (SEM) photograph of condensation material. result shows, MnO2No longer it is nano wire and is bar-like, complex is also no longer class blade knot
Structure.Fig. 4 is nitrogen-doped graphene/MnO prepared by the embodiment of the present invention 1～3 and comparative example 1,22The electrochemistry of composite
Data, by disk electrode test, it can be seen that the complex that comparative example 1 is obtained has poor hydrogen reduction catalytic performance, (negative rises
The electric current of beginning current potential, half wave potential and minimum).
The explanation of above example is only intended to help and understands the method for the present invention and its core concept.It should be pointed out that right
For those skilled in the art, under the premise without departing from the principles of the invention, the present invention can also be carried out
Some improvement and modification, these improve and modification is also fallen in the protection domain of the claims in the present invention.
Claims (7)
1. a kind of nitrogen-doped graphene/MnO2Composite, it is characterised in that described to be compounded on nitrogen-doped graphene lamella
MnO2For wire MnO2, wire MnO2A diameter of 10～20nm.
2. a kind of nitrogen-doped graphene/MnO2The preparation method of composite, including：
1) manganese source compound solution and graphene oxide solution are mixed, obtain the first mixed liquor,
The manganese source compound is hydration manganese acetate；
2) Ammonium persulfate. is added in the first mixed solution, under the conditions of 80～200 DEG C, 1～36h of hydro-thermal reaction, obtains N doping
Graphene/MnO2Composite.
3. preparation method according to claim 2, it is characterised in that the quality of the graphene oxide and manganese source compound
Than for 1: (5～30).
4. preparation method according to claim 2, it is characterised in that the concentration of the graphene oxide solution is 2～
3.5g/L。
5. preparation method according to claim 2, it is characterised in that the concentration of the manganese source compound solution is 5～
100g/L。
6. preparation method according to claim 2, it is characterised in that the manganese acetate with the Ammonium persulfate. mass ratio is
1∶(2-10)。
7. preparation method according to claim 2, it is characterised in that the concentration of the ammonium persulfate solution is 10～
100g/L。
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| CN108172408A (en) * | 2017-12-27 | 2018-06-15 | 合肥工业大学 | A kind of NH2-rGO/MnO2Composite material, preparation method and application |
| CN109399619B (en) * | 2018-12-31 | 2021-06-04 | 太原理工大学 | Preparation method of nitrogen-doped graphene aerogel |
| CN114544739A (en) * | 2022-01-19 | 2022-05-27 | 江苏大学 | MnO (MnO)2Preparation method of/N-doped graphene electrochemical sensor and application of zinc ion detection |
| CN115403093A (en) * | 2022-08-30 | 2022-11-29 | 扬州大学 | SMNG evaporator for solar photo-thermal steam conversion and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108172408A (en) * | 2017-12-27 | 2018-06-15 | 合肥工业大学 | A kind of NH2-rGO/MnO2Composite material, preparation method and application |
| CN108172408B (en) * | 2017-12-27 | 2020-10-13 | 合肥工业大学 | NH (hydrogen sulfide)2-rGO/MnO2Composite material, preparation method and application |
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| CN114544739B (en) * | 2022-01-19 | 2024-02-23 | 江苏大学 | MnO (MnO) 2 Preparation method of N-doped graphene electrochemical sensor and zinc ion detection application |
| CN115403093A (en) * | 2022-08-30 | 2022-11-29 | 扬州大学 | SMNG evaporator for solar photo-thermal steam conversion and preparation method thereof |
| CN115403093B (en) * | 2022-08-30 | 2023-11-24 | 扬州大学 | SMNG evaporator for solar photo-thermal steam conversion and preparation method |
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