CN110280285B - Indium-based metal organic framework/graphite-like phase nitrogen carbide nanosheet composite material and preparation method and application thereof - Google Patents
Indium-based metal organic framework/graphite-like phase nitrogen carbide nanosheet composite material and preparation method and application thereof Download PDFInfo
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 90
- 239000002135 nanosheet Substances 0.000 title claims abstract description 45
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 45
- 239000002131 composite material Substances 0.000 title claims abstract description 35
- 239000013346 indium-based metal-organic framework Substances 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000000047 product Substances 0.000 claims abstract description 24
- HEFNNWSXXWATRW-UHFFFAOYSA-N Ibuprofen Chemical compound CC(C)CC1=CC=C(C(C)C(O)=O)C=C1 HEFNNWSXXWATRW-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229960001680 ibuprofen Drugs 0.000 claims abstract description 23
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 27
- 239000007788 liquid Substances 0.000 claims description 24
- 238000003756 stirring Methods 0.000 claims description 22
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 21
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- 239000000843 powder Substances 0.000 claims description 11
- YZZFBYAKINKKFM-UHFFFAOYSA-N dinitrooxyindiganyl nitrate;hydrate Chemical compound O.[In+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O YZZFBYAKINKKFM-UHFFFAOYSA-N 0.000 claims description 10
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- 239000006185 dispersion Substances 0.000 claims description 4
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- 230000000593 degrading effect Effects 0.000 abstract description 3
- 239000002351 wastewater Substances 0.000 abstract description 3
- 239000013216 MIL-68 Substances 0.000 description 25
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- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- BSYNRYMUTXBXSQ-UHFFFAOYSA-N Aspirin Chemical compound CC(=O)OC1=CC=CC=C1C(O)=O BSYNRYMUTXBXSQ-UHFFFAOYSA-N 0.000 description 1
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- 239000002106 nanomesh Substances 0.000 description 1
- 239000002055 nanoplate Substances 0.000 description 1
- 229940021182 non-steroidal anti-inflammatory drug Drugs 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 125000002524 organometallic group Chemical group 0.000 description 1
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 1
- 229960005489 paracetamol Drugs 0.000 description 1
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- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
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- 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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- B01J31/2208—Oxygen, e.g. acetylacetonates
- B01J31/2226—Anionic ligands, i.e. the overall ligand carries at least one formal negative charge
- B01J31/223—At least two oxygen atoms present in one at least bidentate or bridging ligand
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Abstract
The invention belongs to the field of photocatalytic materials, and discloses an indium-based metal organic framework/graphite-like phase nitrogen carbide nanosheet composite material as well as a preparation method and application thereof, wherein the preparation method comprises the following steps: (1) preparing graphite-like phase nitrogen carbide nanosheets; (2) preparing an indium-based metal organic framework/graphite-like phase nitrogen carbide nanosheet composite material; (3) continuously heating the mixed solution obtained in the step (2) at the temperature of 110-140 ℃ for 6-24 h, cooling and filtering to obtain an initial product; (4) and (4) washing and purifying the initial product obtained in the step (3) by using a solvent, and drying in vacuum to obtain a final product. The invention has low cost and simple preparation method, and the obtained composite material has excellent photocatalytic performance and obvious effect on thoroughly degrading ibuprofen-containing wastewater.
Description
Technical Field
The invention relates to an indium-based metal organic framework/graphite-like phase nitrogen carbide nanosheet composite material as well as a preparation method and application thereof, and particularly belongs to the field of preparation of photocatalytic materials.
Background
In recent years, with the development of society and the improvement of living standard, the usage amount of medicines is increased year by year, and along with the increase of the society, a large amount of residual medicines enter the environment through pharmaceutical factories, medical wastes, wastewater, excrement and the like, thereby forming a potential threat to the ecological environment and human health. Ibuprofen is one of nonsteroidal anti-inflammatory drugs with the highest detection frequency in the global environment, and is widely applied in the world due to low toxicity, better curative effect and better side effect than aspirin and paracetamol. Ibuprofen can enter the environment through various ways in the production and use processes and becomes a typical pollutant commonly existing in soil, surface water, underground water and seawater in the environment. Due to the unique chemical structure and characteristics of ibuprofen, ibuprofen can stably exist in the environment, and the traditional process of a sewage plant cannot be effectively removed, so that the ibuprofen is accumulated in the environment and organisms, and researches show that the long-term intake of trace ibuprofen can cause biological deformity, drug resistance of microorganisms and the like. Therefore, the novel visible light catalytic material is prepared, the ibuprofen is efficiently and thoroughly degraded, and the method has great practical significance for solving the safety problem of drinking water and maintaining a good water ecological environment.
Metal-Organic Frameworks (MOFs) are a new type of nano-mesh material that has been studied very vigorously in recent years. Because of its advantages of ultra-high specific surface area, high porosity, adjustable aperture and function, it has been applied to different fields. And the MOF with the photocatalytic active center has the advantages of the MOF and good visible light catalytic performance, and shows excellent capability of degrading organic pollutants. However, in the course of a photocatalytic reaction, in the case of a simple MOF, a photo-generated electron and a hole are very easily recombined, thereby causing a decrease in the photocatalytic activity. Therefore, further improvement of the photocatalytic activity of MOF materials is the focus of research.
By compounding MOFs with other band-matched materials,constructing a heterojunction structure between materials is an effective method for widening the visible light response range of the MOF and reducing the recombination probability of photo-generated electrons and holes. It has been found through investigation that graphite-like phase carbon nitride is an ideal material satisfying the above conditions. As a novel non-metal photocatalytic material, graphite-like phase nitrogen carbide has a narrow band gap (about 2.7ev), can absorb visible light with the wavelength less than 475nm, and can play a photocatalytic role under common visible light. Meanwhile, the graphite-like phase nitrogen carbide also has the advantages of easy preparation, good chemical stability and thermal stability, environmental friendliness, no secondary pollution, low cost and the like, and is widely applied to indoor air pollution treatment and organic matter degradation in recent years. Currently, there are some related studies, such as: g-C3N4/MIL-53(Al)(Applied Organometallic Chemistry,2015,29(10):690–697)，g-C3N4MIL-125(Ti) (Applied Catalysis B: Environmental,2015, 174-. But all present g-C3N4The material is easy to agglomerate and is dispersed unevenly in the MOF, so that the transfer of photo-generated electrons and holes among the materials is influenced, and the promotion of the photocatalytic activity of the material is limited. Accordingly, the present invention has been made in an effort to solve the above problems.
Disclosure of Invention
The invention aims to provide an indium-based metal organic framework/graphite-like phase nitrogen carbide nanosheet composite material.
The invention also aims to provide a preparation method of the indium-based metal organic framework/graphite-like phase nitrogen carbide nanosheet composite material.
The invention further aims to provide application of the indium-based metal organic framework/graphite-like phase nitrogen carbide nanosheet composite material in the field of photocatalysis.
The purpose of the invention is realized by the following technical scheme:
a preparation method of an indium-based metal organic framework/graphite-like phase nitrogen carbide nanosheet composite material comprises the following steps:
(1) preparing graphite-like phase nitrogen carbide nanosheets;
(2) preparing an indium-based metal organic framework/graphite-like phase nitrogen carbide nanosheet composite material by adopting any one of the following methods:
a. dispersing graphite-like phase nitrogen carbide nanosheets in N, N' -dimethylformamide, stirring to form a uniform light yellow turbid liquid, and performing ultrasonic treatment for 1-10h to further disperse the turbid liquid; adding indium nitrate hydrate and 2-amino terephthalic acid into the dispersion liquid at the same time, and repeating the stirring and the ultrasonic operation;
b. dispersing graphite-like phase nitrogen carbide nanosheets and indium nitrate hydrate in N, N' -dimethylformamide, stirring to form uniform yellowish turbid liquid, and performing ultrasonic treatment for 1-10h to further disperse the yellowish turbid liquid; adding 2-amino terephthalic acid into the dispersion liquid, and repeating the stirring and ultrasonic operation;
c. adding graphite-like phase nitrogen carbide nanosheets, indium nitrate hydrate and 2-amino terephthalic acid into N, N' -dimethylformamide, stirring to form uniform light yellow turbid liquid, and performing ultrasonic treatment for 4-16h to further disperse the turbid liquid;
(3) continuously heating the mixed solution obtained in the step (2) at the temperature of 110-140 ℃ for 6-24 h, cooling and filtering to obtain an initial product;
(4) and (4) washing and purifying the initial product obtained in the step (3) by using a solvent, and drying in vacuum to obtain a final product.
Preferably, the content of the graphite-phase nitrogen carbide nanosheets in the step (2) in the mixed solution is 0.004g/mL-0.008g/mL, the content of the indium nitrate in the mixed solution is 0.08-0.12g/mL, and the mass ratio of the indium nitrate to the 2-aminoterephthalic acid is (4.8-5.3): 1.
preferably, the ultrasonic treatment time in the steps (2) a and (b) is 2-8h, and the stirring time is 1-4 h; in the step c, the ultrasonic treatment time is 8-12 hours, and the stirring time is 3-6 hours.
Preferably, the solvent in step (4) is N, N' -dimethylformamide and methanol; the purification was performed by washing 3 times with N, N' -dimethylformamide and methanol, respectively.
Preferably, the temperature of the vacuum drying in the step (4) is 100-130 ℃, and the time is 12-24 h.
Preferably, the preparation of the graphite-like phase nitrogen carbide nanoplates: sealing melamine powder with tinfoilIn general N2Calcining the mixture in a tubular furnace at the temperature of 450-550 ℃ for 4-6h to obtain a light yellow blocky product, grinding the product into powder, and then transferring the powder into a muffle furnace for high-temperature thermal oxidation at the temperature of 500-600 ℃ for 2-6h to obtain the graphite-like phase nitrogen carbide nanosheet.
Preferably, the tube furnace temperature rise rate is 5 ℃/min.
The indium-based metal organic framework/graphite-like phase nitrogen carbide nanosheet composite material prepared by the method is applied to photocatalytic degradation of residual drugs in water.
The indium-based metal organic framework/graphite-like phase nitrogen carbide nanosheet composite material is applied to degradation of ibuprofen in water.
Compared with the prior art, the invention has the following advantages:
(1) according to the invention, graphite-like phase nitrogen carbide prepared by a thermal polymerization method is subjected to high-temperature thermal oxidation again to obtain graphite-like phase nitrogen carbide nanosheets, so that the problem of easy agglomeration of graphite-like phase nitrogen carbide is effectively solved while the specific surface area and the photocatalytic performance of the material are improved.
(2) Graphite-like phase nitrogen carbide nanosheets are introduced in situ by a solvothermal method, so that the graphite-like phase nitrogen carbide nanosheets are tightly combined with an indium-based metal organic framework crystal interface and are uniformly distributed to form a heterojunction, thereby facilitating the rapid transfer of photo-generated electrons and holes between materials, reducing the recombination probability of the photo-generated electrons and holes, widening the visible light absorption range and remarkably improving the photocatalytic activity of the materials.
(3) The finally prepared indium-based metal organic framework/graphite-like phase nitrogen carbide nanosheet composite material is low in cost, simple in process and expected to realize large-scale production. The composite material can be used as an effective photocatalyst while maintaining the excellent adsorption capacity of the MOF, and has an obvious effect on thoroughly degrading ibuprofen-containing wastewater.
Drawings
FIG. 1 is g-C obtained in comparative example 13N4Nanosheet, MIL-68(In) -NH prepared In comparative example 22And g-C obtained in comparative example 33N4/MIL-68(In)-NH2Composite materials and g-C prepared in examples 1-33N4/MIL-68(In)-NH2Composite materialAnd (5) comparing XRD spectrograms of the materials.
FIG. 2 is g-C obtained in comparative example 13N4Nanosheet, MIL-68(In) -NH prepared In comparative example 22And g-C obtained in comparative example 33N4/MIL-68(In)-NH2Composite materials and g-C prepared in examples 1-33N4/MIL-68(In)-NH2FTIR spectra of the composite materials are compared.
FIG. 3 is a graph of the degradation profile of different photocatalysts in visible light (. lamda. >420nm) for ibuprofen. (experimental conditions: the dosage of the photocatalyst is 20mg, the dosage of the ibuprofen is 200mL, and the initial concentration of the ibuprofen is 20 mg/L).
Detailed Description
The present invention will be further described with reference to the following examples and drawings, but the practice of the invention is not limited thereto, and any modified practice is included within the technical scope of the invention.
Comparative example 1
g-C3N4Preparation of nanosheets
Accurately weighing 10g of melamine powder in a porcelain boat, sealing with tinfoil, and putting in a lead-in N2Calcining the mixture in a tubular furnace at 550 ℃ for 4h (the heating rate is 5 ℃/min) to obtain a faint yellow blocky product, grinding the faint yellow blocky product into powder, transferring the powder into a muffle furnace, and heating the powder for 2h at 500 ℃ to obtain the graphite-like phase nitrogen carbide nanosheet.
Comparative example 2
MIL-68(In)-NH2Preparation of
0.578g In (NO)3)3.xH2O and 0.118g of 2-amino terephthalic acid are added into 6.2mL of N, N' -dimethylformamide at the same time, and after vigorous stirring for 30min, ultrasonic treatment is carried out for 10min to obtain a uniform solution. And transferring the solution into a 50mL high-pressure reaction kettle, heating at 125 ℃ for 24h, and naturally cooling to obtain an initial product. The material was further purified by washing three times with 50mL of N, N' -dimethylformamide and methanol, respectively. Finally, the mixture is dried and activated for 12 hours In a vacuum drying oven at the temperature of 130 ℃, and is ground by an agate mortar to obtain MIL-68(In) -NH2A pale yellow powder.
Comparative example 3
g-C3N4/MIL-68(In)-NH2Preparation of
Accurately weighing 0.02g of graphite-like phase nitrogen carbide nanosheets, dispersing in 5mL of N, N' -dimethylformamide, violently stirring for 1h to form uniform light yellow turbid liquid, and performing ultrasonic treatment for 2h to further uniformly disperse the turbid liquid. To the solution were added 0.578g of indium nitrate hydrate, 0.118g of 2-aminoterephthalic acid and 1.5mL of N, N' -dimethylformamide simultaneously, and the above stirring and ultrasonic operation were repeated. Transferring the obtained mixed solution into a 50mL high-pressure reaction kettle, continuously heating for 24h at 125 ℃, cooling to room temperature, and filtering to obtain a primary product. And respectively washing the primary product with 50mL of N, N' -dimethylformamide and methanol for three times, and drying in a vacuum drying oven for 12h to obtain the indium-based metal organic framework/graphite-like phase nitrogen carbide nanosheet composite material.
Example 1
g-C3N4/MIL-68(In)-NH2Preparation of
Accurately weighing 0.04g of graphite-like phase nitrogen carbide nanosheets, dispersing in 6.5mL of N, N' -dimethylformamide, vigorously stirring for 1.5h to form uniform light yellow turbid liquid, and carrying out ultrasonic treatment for 3h to further uniformly disperse the turbid liquid. To the solution were added 0.578g of indium nitrate hydrate and 0.118g of 2-aminoterephthalic acid simultaneously, and the above stirring and ultrasonic operation were repeated. Transferring the obtained mixed solution into a 50mL high-pressure reaction kettle, continuously heating for 18h at 130 ℃, cooling to room temperature, and filtering to obtain a primary product. And respectively washing the primary product with 50mLN, N' -dimethylformamide and methanol for three times, and placing the washed primary product in a vacuum drying oven for drying for 24 hours to obtain the indium-based metal organic framework/graphite-like phase nitrogen carbide nanosheet composite material.
Example 2
g-C3N4/MIL-68(In)-NH2Preparation of
Accurately weighing 0.08g of graphite-like phase nitrogen carbide nanosheets and 1.245g of indium nitrate hydrate, dispersing in 13mL of N, N' -dimethylformamide, violently stirring for 2 hours to form uniform light yellow turbid liquid, and then carrying out ultrasonic treatment for 4 hours to further uniformly disperse the turbid liquid. 0.236g of 2-aminoterephthalic acid was further added to the solution, and the above stirring and ultrasonic operation were repeated. Transferring the obtained mixed solution into a 50mL high-pressure reaction kettle, continuously heating for 12h at 110 ℃, cooling to room temperature, and filtering to obtain a primary product. And respectively washing the primary product with 100mLN, N' -dimethylformamide and methanol for three times, and placing the washed primary product in a vacuum drying oven for drying for 24 hours to obtain the indium-based metal organic framework/graphite-like phase nitrogen carbide nanosheet composite material.
Example 3
g-C3N4/MIL-68(In)-NH2Preparation of
Accurately weighing 0.12g of graphite-like phase nitrogen carbide nanosheets, 1.743g of indium nitrate hydrate and 0.345g of 2-aminoterephthalic acid, dispersing in 15mL of N, N' -dimethylformamide, violently stirring for 4h to form uniform light yellow turbid liquid, and performing ultrasonic treatment for 6h to thoroughly and uniformly disperse the turbid liquid. Transferring the obtained mixed solution into a 50mL high-pressure reaction kettle, continuously heating for 6h at 140 ℃, cooling to room temperature, and filtering to obtain a primary product. And respectively washing the primary product with 100mL of N, N' -dimethylformamide and methanol for three times, and placing the washed primary product in a vacuum drying oven for drying for 24 hours to obtain the indium-based metal organic framework/graphite-like phase nitrogen carbide nanosheet composite material.
g-C prepared in comparative examples 1 to 3 and examples 1 to 3 of the present invention3N4Nanosheet, MIL-68(In) -NH2And g-C3N4/MIL-68(In)-NH2The XRD and photocatalytic degradation ibuprofen curves are as follows:
(1) XRD pattern analysis
The crystal structures of the materials prepared in comparative examples 1 to 3 and examples 1 to 3 of the present invention were specifically analyzed by an Empyrean Sharp X-ray diffractometer manufactured by Parnake, the Netherlands, wherein the operating conditions were as follows: copper target, 40KV, 40mA, step size 0.0131 degree, scan speed 9.664 seconds/step, the results are shown in fig. 1.
Analysis according to FIG. 1 revealed that g-C produced in examples 1 to 33N4/MIL-68(In)-NH2Diffraction peak of composite material and MIL-68(In) -NH prepared In comparative example 22And g-C obtained in comparative example 33N4/MIL-68(In)-NH2The XRD diffraction patterns of the composite material are basically consistent, the peak shape is sharp, and no new miscellaneous peak appearsThis shows that g-C prepared in examples 1 to 33N4/MIL-68(In)-NH2The composite material retains the parent MIL-68(In) -NH2The crystal structure of (A) and the crystal form are good.
(2) FTIR spectroscopy
Analyzing the surface groups of the prepared material by adopting a Fourier transform infrared spectrum characterization means, and comprising the following operation steps of: weighing a certain amount of KBr powder and a sample according to the mass ratio of 100:1, grinding the KBr powder and the sample until the KBr powder and the sample are uniformly mixed, placing the mixture under a tablet press to prepare a round slice, fixing the round slice in an instrument for spectral scanning, wherein the scanning wavelength range is as follows: 500-4000cm-1. From the results of FIG. 2, the wave number in comparative example 1 was 1650-1200cm-1Vibration bands in the range corresponding to g-C3N4Typical aromatic C-N stretching vibrations and out-of-plane bending vibrations of heptazine ring, 881 and 810cm-1The absorption peak is related to the respiration mode of the triazine ring unit; in comparative example 2, the height of the sample was 1255cm-1The absorption peak is C-N stretching vibration mode; all the characteristic vibration peaks of comparative examples 1 to 2 appeared in the IR spectra of comparative example 3 and examples 1 to 3, demonstrating g-C3N4With MIL-68(In) -NH2The complete organic functional group of the monomer material is reserved in the composite material.
(3) Analysis of degradation effect of ibuprofen
The degradation experiment of ibuprofen verifies the photocatalytic performance of the materials in comparative examples 1-3 and examples 1-3, and the experimental conditions are as follows:
the adding amount of the photocatalyst is 0.1 g/L; the initial concentration of ibuprofen is 20 mg/L;
the adsorption time is 1 h; the illumination time is 2 h; the light source is a 300W xenon lamp (lambda is more than 420 nm);
the detection instrument is a Waters High Performance Liquid Chromatography (HPLC)4.6mm × 250mm 5 μm C18 column;
the detection conditions were mobile phase 0.1% aqueous formic acid/acetonitrile 30:70(V/V), detection wavelength 223 nm.
The temperature of the chromatographic column is 40 ℃, the sample injection amount is 10 mu L, and the peak-off time is 5.5 min.
FIG. 3 shows g-C obtained in examples 1 to 33N4/MIL-68(In)-NH2Composite with g-C from comparative example 13N4Nanosheet, MIL-68(In) -NH prepared In comparative example 22And g-C obtained in comparative example 33N4/MIL-68(In)-NH2Graph of photocatalytic degradation of ibuprofen by the composite material. From FIG. 3, it can be seen that: g-C obtained in examples 1-3, compared to comparative examples 1-33N4/MIL-68(In)-NH2The composite material has more remarkable photocatalytic degradation effect on ibuprofen in a water body, and after 120min of illumination, the photocatalytic removal efficiency of the ibuprofen in the embodiment 2 is as high as 97.2 percent, which is 10.8 times and 1.6 times of that of the ibuprofen in the comparative example 1 and the ibuprofen in the comparative example 2 respectively. Thus, it was preliminarily demonstrated that g-C produced by the present invention3N4/MIL-68(In)-NH2The composite material has higher utilization efficiency of visible light, photogenerated electrons and holes can be quickly separated, and the photocatalytic activity of the composite material is greatly improved compared with that of a monomer material.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (6)
1. An application of an indium-based metal organic framework/graphite-like phase nitrogen carbide nanosheet composite material in photocatalytic degradation of ibuprofen in a water body is characterized in that the preparation method of the composite material comprises the following steps:
(1) preparing graphite-like phase nitrogen carbide nanosheets:
sealing melamine powder with tinfoil, and putting into a container filled with N2Calcining the mixture in a tubular furnace at the temperature of 450-550 ℃ for 4-6h to obtain a light yellow blocky product, grinding the product into powder, and then transferring the powder into a muffle furnace for high-temperature thermal oxidation at the temperature of 500-600 ℃ for 2-6h to obtain graphite-like phase nitrogen carbide nano-sheets;
(2) preparing an indium-based metal organic framework/graphite-like phase nitrogen carbide nanosheet composite material by adopting any one of the following methods:
a. dispersing graphite-like phase nitrogen carbide nanosheets in N, N' -dimethylformamide, stirring to form a uniform light yellow turbid liquid, and performing ultrasonic treatment for 1-10h to further disperse the turbid liquid; adding indium nitrate hydrate and 2-amino terephthalic acid into the dispersion liquid at the same time, and repeating the stirring and the ultrasonic operation;
b. dispersing graphite-like phase nitrogen carbide nanosheets and indium nitrate hydrate in N, N' -dimethylformamide, stirring to form uniform yellowish turbid liquid, and performing ultrasonic treatment for 1-10h to further disperse the yellowish turbid liquid; adding 2-amino terephthalic acid into the dispersion liquid, and repeating the stirring and ultrasonic operation;
c. adding graphite-like phase nitrogen carbide nanosheets, indium nitrate hydrate and 2-amino terephthalic acid into N, N' -dimethylformamide, stirring to form uniform light yellow turbid liquid, and performing ultrasonic treatment for 4-16h to further disperse the turbid liquid;
(3) continuously heating the mixed solution obtained in the step (2) at the temperature of 110-140 ℃ for 6-24 h, cooling and filtering to obtain an initial product;
(4) and (4) washing and purifying the initial product obtained in the step (3) by using a solvent, and drying in vacuum to obtain a final product.
2. The use of claim 1, wherein the content of the graphite-phase nitrogen carbide nanosheets in the mixed solution in step (2) is 0.004g/mL to 0.008g/mL, and the content of the indium nitrate in the mixed solution is 0.08 g/mL to 0.12g/mL, wherein the mass ratio of the indium nitrate to the 2-aminoterephthalic acid is (4.8 to 5.3): 1.
3. the use according to claim 2, wherein the sonication time in steps (2) a and b is 2-8h, and the stirring time is 1-4 h; in the step c, the ultrasonic treatment time is 8-12 hours, and the stirring time is 3-6 hours.
4. The use according to claim 3, wherein the solvent of step (4) is N, N' -dimethylformamide and methanol; the purification was performed by washing 3 times with N, N' -dimethylformamide and methanol, respectively.
5. The use according to claim 1 or 2 or 3 or 4, wherein the temperature of the vacuum drying in step (4) is 100 ℃ and 130 ℃ for 12-24 h.
6. Use according to claim 5, wherein the tube furnace ramp rate is 5 ℃/min.
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