CN112023973A - g-C with high photocatalytic efficiency3N4And method for preparing the same - Google Patents
g-C with high photocatalytic efficiency3N4And method for preparing the same Download PDFInfo
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- 230000001699 photocatalysis Effects 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000002105 nanoparticle Substances 0.000 claims abstract description 32
- 238000002360 preparation method Methods 0.000 claims abstract description 18
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea group Chemical group NC(=S)N UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000002243 precursor Substances 0.000 claims abstract description 10
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000011148 porous material Substances 0.000 claims abstract description 6
- BBEAQIROQSPTKN-UHFFFAOYSA-N pyrene Chemical compound C1=CC=C2C=CC3=CC=CC4=CC=C1C2=C43 BBEAQIROQSPTKN-UHFFFAOYSA-N 0.000 claims description 49
- GVEPBJHOBDJJJI-UHFFFAOYSA-N fluoranthrene Natural products C1=CC(C2=CC=CC=C22)=C3C2=CC=CC3=C1 GVEPBJHOBDJJJI-UHFFFAOYSA-N 0.000 claims description 25
- 239000000843 powder Substances 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 13
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 12
- 238000003760 magnetic stirring Methods 0.000 claims description 9
- 238000001338 self-assembly Methods 0.000 claims description 8
- 238000005245 sintering Methods 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000002390 rotary evaporation Methods 0.000 claims description 3
- CYNYIHKIEHGYOZ-UHFFFAOYSA-N 1-bromopropane Chemical compound CCCBr CYNYIHKIEHGYOZ-UHFFFAOYSA-N 0.000 claims description 2
- 229920002472 Starch Polymers 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 claims description 2
- 150000004032 porphyrins Chemical class 0.000 claims description 2
- 239000008107 starch Substances 0.000 claims description 2
- 235000019698 starch Nutrition 0.000 claims description 2
- 239000004094 surface-active agent Substances 0.000 claims description 2
- 238000013033 photocatalytic degradation reaction Methods 0.000 abstract description 10
- 239000011941 photocatalyst Substances 0.000 abstract description 6
- 239000004065 semiconductor Substances 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 3
- 239000000975 dye Substances 0.000 abstract 1
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 description 12
- 229960000907 methylthioninium chloride Drugs 0.000 description 12
- 230000000694 effects Effects 0.000 description 10
- 238000012360 testing method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 239000002135 nanosheet Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007146 photocatalysis Methods 0.000 description 3
- 238000010025 steaming Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000000862 absorption spectrum Methods 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000002336 sorption--desorption measurement Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical group C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N SnO2 Inorganic materials O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000002902 bimodal effect Effects 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 125000005581 pyrene group Chemical group 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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Classifications
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- B01J35/39—
-
- 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
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- B01J35/61—
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/06—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
- C01B21/0605—Binary compounds of nitrogen with carbon
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/40—Organic compounds containing sulfur
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
Abstract
The invention provides a g-C with high photocatalytic efficiency3N4And a process for the preparation thereof by template method, g-C3N4The precursor is thiourea, organic nano particles are used as templates and added into the thiourea for g-C3N4And carrying out pore forming so as to obtain a porous structure. By adding organic nano-particles with different addition contents as templates, porous g-C can be prepared3N4Realizing larger specific surface area and increasing the active sites of the photocatalytic reactionThereby improving the photocatalytic efficiency thereof. The method is simple and easy to implement and has low cost. The research on the application of the obtained novel semiconductor photocatalyst material in photocatalytic degradation of organic dyes shows that the structure has high-efficiency photocatalytic activity. Provides possibility for being widely applied to pollution treatment and energy exhaustion.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the field of semiconductor photocatalysis, and particularly relates to g-C with high photocatalytic efficiency3N4And a method for preparing the same.
[ background of the invention ]
In recent years, the situation that the traditional energy sources are increasingly unbalanced in supply and demand and global climate warming becomes more severe, the improvement work on environmental pollution is increased in various countries in the world, and the development and utilization of new energy sources and new energy technology are increased.
The solar energy has great potential, low environmental pollution and sustainable utilization, and is an important energy source for green ecological development. The semiconductor photocatalysis technology can directly utilize solar energy to drive reaction, so the semiconductor photocatalysis technology has important application prospect in the fields of energy and environment. The paper about hydrogen production by decomposing water under visible light by graphite-like phase carbon nitride published in journal of Nature Materials by Wangxinchen et al in 2008 attracts scientists all over the world, g-C3N4Has the advantages of simple synthesis, stable physicochemical property, strong biocompatibility, recycling use, proper band gap and the like. (A metal-free polymeric photocatalytic analysis for hydrogen production from water unit visible light, Wang X, Maeda K, Thomas A, NATURE MATERIALS,2009,8(1): 76-80.). But g-C3N4Has the problems of low specific surface area, limited active sites, high recombination rate of photo-generated electrons and holes and the like. The organic nano-particles have the advantages of typical uniform size, lower melting point and smaller size, can be used as a template, are mixed with a precursor, and are decomposed and volatilized in the sintering process to reach the aim of g-C3N4Purpose of pore formation (simple synthesis of bimodal macroperous g-C)3N4/SnO2nanohybrids with enhanced photocatalytic activity,Chen Y,Li W,Jiang D,SCI BULL,2019,64(01):44)。
Accordingly, the present invention provides a g-C having high photocatalytic efficiency3N4And methods of making the same, address deficiencies of the art, and to solve or mitigate one or more of the problems set forth above.
[ summary of the invention ]
In view of the above, the present invention provides a preparation method, wherein organic nanoparticles are added as a soft template to perform pore-forming, such that porous g-C is improved3N4The specific surface area of the photocatalyst provides more active sites, thereby improving the photocatalytic performance of the catalyst.
In one aspect, the present invention provides a g-C with high photocatalytic efficiency3N4Characterized in that the method adds organic nanoparticles as a template to g-C by a templating method3N4In the precursor, for g-C3N4Carrying out pore-forming to obtain g-C with high photocatalytic efficiency3N4。
The above aspects and any possible implementation manner further provide an implementation manner, and the preparation method specifically includes the following steps:
s1: preparation of organic Nanometemplates
Taking powder of organic nano particles, stirring and dissolving the powder in acetone, adding water into the solution, magnetically stirring the solution, and then carrying out self-assembly to obtain an organic nano template;
s2: template method for preparing g-C with high photocatalytic efficiency3N4
Adding 80-100mL of water into the organic nano template in S1, stirring uniformly, and adding g-C3N4Precursor, magnetic stirring, rotary steaming, sintering and grinding to obtain g-C with high photocatalytic efficiency3N4g-C with high photocatalytic efficiency3N4Has a porous structure.
In accordance with the above aspect and any possible implementation manner, there is further provided an implementation manner that in S1, the organic nanoparticle is pyrene, porphyrin, 1-bromopropane, P123 surfactant or starch, and the added content is 0-1 g.
The above aspect and any possible implementation manner further provide an implementation manner, wherein a concentration of the solution of the powder of organic nanoparticles in S1 dissolved in acetone is 5-10mg/mL, and a magnetic stirring time is 20-30 min.
As for the above-mentioned aspect and any possible implementation manner, there is further provided an implementation manner, where the spin-steaming method in S2 specifically includes: the water bath temperature is 55-65 ℃, and the rotating speed is 85-95 r/min.
In the foregoing aspect and any possible implementation manner, a further implementation manner is provided, where the sintering method in S2 specifically includes: the atmosphere is air atmosphere, the temperature rising speed is 10 ℃/min, the heat preservation temperature is 540-.
The above aspects and any possible implementations further provide an implementation, the g-C3N4The precursor is thiourea, and the addition content is 10-11 g.
The above aspects and any possible implementations further provide a g-C with high photocatalytic efficiency3N4Prepared by the method, characterized in that the g-C with high photocatalytic efficiency3N4Is g-C with a porous structure3N4。
The above aspect and any possible implementation further provides an implementation of the g-C having a porous structure3N4The pore size is in the mesoporous range.
Compared with the prior art, the invention can obtain the following technical effects:
1. the organic nanometer template pyrene is obtained by a simple and easy self-assembly method;
2. the invention regulates and controls the porous g-C by using organic nano particles as a template through a novel template method3N4The structure and the performance of the photocatalyst increase the specific surface area and increase the active sites of the catalytic reaction, thereby improving the photocatalytic efficiency and showing the high-efficiency photocatalytic performance in the photocatalytic degradation of Methylene Blue (MB).
Of course, it is not necessary for any one product in which the invention is practiced to achieve all of the above-described technical effects simultaneously.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a graph showing the preparation of g-C without adding organic nanoparticles in example 1 of the present invention3N4Scanning Electron Microscope (SEM) photograph of (a);
FIG. 2 is a graph showing the preparation of g-C without adding organic nanoparticles in example 1 of the present invention3N4The effect graph of the photocatalytic degradation of methylene blue is shown;
FIG. 3 is a Scanning Electron Microscope (SEM) photograph of the organic nano template pyrene morphology in example 2 of the present invention;
FIG. 4 is a graph showing that 20mg of organic nanoparticles of pyrene was added as a template to prepare porous g-C in example 2 of the present invention3N4Scanning Electron Microscope (SEM) photograph of (a);
FIG. 5 is a graph showing that 20mg of organic nanoparticles of pyrene was added as a template to prepare porous g-C in example 2 of the present invention3N4The effect graph of the photocatalytic degradation of methylene blue is shown;
FIG. 6 is a graph showing that porous g-C is prepared by adding 50mg of organic nanoparticles of pyrene as a template in example 3 of the present invention3N4Scanning Electron Microscope (SEM) photograph of (a);
FIG. 7 is a graph showing that porous g-C is prepared by adding 50mg of organic nanoparticles of pyrene as a template in example 3 of the present invention3N4The effect graph of the photocatalytic degradation of methylene blue is shown;
FIG. 8 is a graph showing that 70mg of organic nanoparticles, pyrene, was added as a template to prepare porous g-C in example 4 of the present invention3N4Scanning Electron Microscope (SEM) photograph of (a);
FIG. 9 is a graph showing that 70mg of organic nanoparticles, pyrene, was added as a template to prepare porous g-C in example 4 of the present invention3N4The effect graph of the photocatalytic degradation of methylene blue is shown;
FIG. 10 is a graph showing that porous g-C is prepared by adding 100mg of organic nanoparticles of pyrene as a template in example 5 of the present invention3N4Scanning Electron Microscope (SEM) photograph of (a);
FIG. 11 is a graph showing that porous g-C is prepared by adding 100mg of organic nanoparticles of pyrene as a template in example 5 of the present invention3N4The effect graph of the photocatalytic degradation of methylene blue is shown;
FIG. 12 is a graph showing that porous g-C is prepared by adding 200mg of organic nanoparticles of pyrene as a template in example 6 of the present invention3N4Scanning Electron Microscope (SEM) photograph of (a);
FIG. 13 is a graph showing that porous g-C is prepared by adding 200mg of organic nanoparticles of pyrene as a template in example 6 of the present invention3N4The effect graph of the photocatalytic degradation of methylene blue is shown.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The invention provides a g-C with high photocatalytic efficiency3N4The preparation method comprises the following steps:
1) preparation of organic Nanometemplates
And (3) taking the powder of the organic nano particles, stirring and dissolving in acetone, adding water into the solution, and carrying out magnetic stirring for self-assembly to obtain the organic nano template.
2) Template method for preparing porous g-C3N4
Adding water into the organic nano template in the step 1) to 80-90mL, stirring uniformly, and adding a precursorMagnetically stirring, rotary steaming, sintering and grinding to obtain porous g-C3N4A photocatalyst.
In the step 1), the organic nano-particles are pyrene, and the addition content is 0-200 mg.
The concentration of the solution in the step 1) is 5mg/mL, and the magnetic stirring time is 20-30 min.
In the step 1), 20-30mL of water is required to be added when the organic nano-particle pyrene is subjected to self-assembly, and the magnetic stirring time is 30 min.
The precursor in the step 2) is thiourea, and the addition content is 10.7-10.9 g.
The rotary evaporation in the step 2) is specifically as follows: the water bath temperature was 60 ℃ and the rotation speed was 90 r/min.
The sintering in the step 2) is specifically as follows: the atmosphere is air atmosphere, the temperature rising speed is 10 ℃/min, the heat preservation temperature is 540-.
The invention also provides g-C with high photocatalytic efficiency3N4The g-C with high photocatalytic efficiency is prepared by the preparation method3N4Is g-C with a porous structure3N4The pore size is in the mesoporous range.
The organic nanometer template pyrene is obtained by a simple and easy self-assembly method. The invention regulates and controls the porous g-C by using organic nano particles as a template through a novel template method3N4The structure and the performance of the photocatalyst increase the specific surface area and increase the active sites of the catalytic reaction, thereby improving the photocatalytic efficiency and showing the high-efficiency photocatalytic performance in the photocatalytic degradation of Methylene Blue (MB).
Example 1:
the preparation method comprises the following specific steps:
taking 10.8g of thiourea powder, adding 80mL of water, magnetically stirring, rotationally evaporating at the water bath temperature of 60 ℃ and the rotation speed of 90r/min to obtain powder, putting the powder into a heat treatment box furnace in an air atmosphere at the temperature rise speed of 10 ℃/min, and preserving heat for 2h after the temperature rises to 550 ℃; taking out after furnace cooling, and grinding into powder. FIG. 1 shows a schematic view of aVisible phase g-C3N4The structural morphology of (1).
And (3) performance testing:
weighing the prepared bulk phase g-C3N4Adding 5mg of the powder into 50mL of 0.04mM MB solution, performing adsorption-desorption equilibrium under dark conditions, irradiating for 100 minutes under simulated sunlight (illumination intensity of 100mW/cm2), and sampling every 10 minutes for performing ultraviolet-visible absorption spectrum test; the results of testing the performance for the samples prepared in example 1 are shown in figure 2.
Example 2:
the organic compound used in this example was pyrene, provided by shanghai alading biochemical science and technology ltd, which was not further processed before use, and its structural formula is shown in formula 1:
the preparation method comprises the following specific steps:
1) and (3) taking 20mg of pyrene powder, stirring and dissolving in acetone, adding a proper amount of water into the solution, and carrying out magnetic stirring for 30min for self-assembly to obtain the organic nano template pyrene. FIG. 3 shows the morphology of organic nano template pyrene.
2) Adding water to 80mL, stirring uniformly, adding 10.8g of thiourea powder, stirring by magnetic force, performing rotary evaporation at the water bath temperature of 60 ℃ and the rotation speed of 90r/min to obtain powder, putting the powder into a heat treatment box type furnace, performing heat preservation for 2h at the temperature rise speed of 10 ℃/min in the air atmosphere, after the temperature rises to 550 ℃, cooling along with the furnace, taking out, and grinding into powder. FIG. 4 shows the porosity g-C3N4Mesoporous structures in photocatalysts.
And (3) performance testing:
weighing porous g-C prepared by template method3N4Adding 5mg of the powder into 50mL of 0.04mM MB solution, performing adsorption-desorption equilibrium under dark conditions, irradiating for 100 minutes under simulated sunlight (illumination intensity of 100mW/cm2), and sampling every 10 minutes for performing ultraviolet-visible absorption spectrum test; for the samples prepared in example 1 and bulk phases g-C3N4The test performance results are shown in fig. 5.
Example 3:
example 1 was repeated except that the content of the powder added of pyrene in the step 1) was 50mg, and porous g-C was obtained3N4The nanosheets are shown in fig. 6, and the performance results are shown in fig. 7.
Example 4:
example 1 was repeated except that the content of the powder added of pyrene in the step 1) was 70mg, and porous g-C was obtained3N4The nanosheets are shown in fig. 8, and the performance results are shown in fig. 9.
Example 5:
example 1 was repeated except that the content of the powder added of pyrene in the step 1) was 100mg, and porous g-C was obtained3N4The nanosheets are shown in fig. 10, and the performance results are shown in fig. 11.
Example 6:
example 1 was repeated except that the content of the powder added of pyrene in the step 1) was 200mg, and porous g-C was obtained3N4The nanosheets are shown in fig. 12, and the performance results are shown in fig. 13.
As can be seen from the above test results and performance results in examples 1 to 6, when various contents of organic nanoparticles were added as templates, all of the prepared g-C particles3N4The photocatalytic degradation efficiency is improved to different degrees, and the degradation effect is reduced along with the increase of the content of the organic nano-particles. Wherein when the addition content is 50mg, the g-C still remains because the addition content is moderate3N4Structure and increasing number of pores on the surface thereof, which results in g-C3N4The specific surface area is increased, so that the active sites are increased, and the photocatalytic efficiency is improved most obviously. After the excessive organic nano particles are added, the photocatalytic efficiency is improved and slightly reduced because the triazine ring structure is seriously damaged.
The g-C with high photocatalytic efficiency provided by the embodiment of the application3N4And a preparation method thereof are described in detail. The above materialsThe description of the embodiments is only for assisting understanding of the method of the present application and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
As used in the specification and claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The foregoing description shows and describes several preferred embodiments of the present application, but as aforementioned, it is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the application as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.
Claims (10)
1. g-C with high photocatalytic efficiency3N4Characterized in that the method adds organic nanoparticles as a template to g-C by a templating method3N4In the precursor, for g-C3N4g-C in the precursor3N4Carrying out pore-forming to obtain g-C with high photocatalytic efficiency3N4。
2. The preparation method according to claim 1, comprising in particular the steps of:
s1: preparation of organic Nanometemplates
Taking powder of organic nano particles, stirring and dissolving the powder in acetone, adding water into the solution, magnetically stirring the solution, and then carrying out self-assembly to obtain an organic nano template;
s2: template method for preparing g-C with high photocatalytic efficiency3N4
Adding 80-100mL of water into the organic nano template in S1, stirring uniformly, and adding g-C3N4Precursor, magnetic stirring, rotary evaporating, sintering and grinding to obtain g-C with high photocatalytic efficiency3N4g-C with high photocatalytic efficiency3N4Has a porous structure.
3. The method according to claim 1, wherein the organic nanoparticles in S1 are pyrene, porphyrin, 1-bromopropane, P123 surfactant or starch, and the added amount is 0-1 g.
4. The preparation method of claim 2, wherein the concentration of the solution of the powder of organic nanoparticles in S1 dissolved in acetone is 5-10mg/mL, and the magnetic stirring time is 20-30 min.
5. The preparation method of claim 2, wherein 20-30mL of water is added during the self-assembly in the S1, and the magnetic stirring time is 30-35 min.
6. The preparation method according to claim 2, wherein the rotary evaporation method in S2 specifically comprises: the water bath temperature is 55-65 ℃, and the rotating speed is 85-95 r/min.
7. The preparation method according to claim 2, wherein the sintering method in S2 specifically comprises: the atmosphere is air atmosphere, the temperature rising speed is 10 ℃/min, the heat preservation temperature is 540-.
8. The method of claim 2, wherein the g-C is3N4The precursor is thiourea, and the addition content is 10-11 g.
9. g-C with high photocatalytic efficiency3N4Prepared on the basis of the process according to any one of claims 1 to 8, characterized in that the g-C with high photocatalytic efficiency3N4Is g-C with a porous structure3N4。
10. The high photocatalytic efficiency g-C of claim 93N4Characterized in that the g-C having a porous structure3N4Which isThe pore size is in the mesoporous range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010948499.4A CN112023973A (en) | 2020-09-10 | 2020-09-10 | g-C with high photocatalytic efficiency3N4And method for preparing the same |
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