CN114146717A - Visible light photocatalytic material with 3D porous structure and preparation method and application thereof - Google Patents
Visible light photocatalytic material with 3D porous structure and preparation method and application thereof Download PDFInfo
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- 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 claims abstract description 11
- 239000004098 Tetracycline Substances 0.000 claims abstract description 11
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- 239000011701 zinc Substances 0.000 claims description 17
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 16
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- 238000010438 heat treatment Methods 0.000 claims description 15
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- 239000000843 powder Substances 0.000 claims description 14
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 claims description 14
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- 229910052751 metal Inorganic materials 0.000 claims description 7
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- 239000011592 zinc chloride Substances 0.000 claims description 7
- 235000005074 zinc chloride Nutrition 0.000 claims description 7
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- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 claims description 6
- 239000000975 dye Substances 0.000 claims description 6
- 238000001704 evaporation Methods 0.000 claims description 6
- 229910001425 magnesium ion Inorganic materials 0.000 claims description 6
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 claims description 6
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims description 6
- ONDPHDOFVYQSGI-UHFFFAOYSA-N zinc nitrate Chemical compound [Zn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ONDPHDOFVYQSGI-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
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- ZOIORXHNWRGPMV-UHFFFAOYSA-N acetic acid;zinc Chemical compound [Zn].CC(O)=O.CC(O)=O ZOIORXHNWRGPMV-UHFFFAOYSA-N 0.000 claims description 3
- UEGPKNKPLBYCNK-UHFFFAOYSA-L magnesium acetate Chemical compound [Mg+2].CC([O-])=O.CC([O-])=O UEGPKNKPLBYCNK-UHFFFAOYSA-L 0.000 claims description 3
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- 235000019341 magnesium sulphate Nutrition 0.000 claims description 3
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 3
- 239000004246 zinc acetate Substances 0.000 claims description 3
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 3
- 229960001763 zinc sulfate Drugs 0.000 claims description 3
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 3
- 239000003242 anti bacterial agent Substances 0.000 claims description 2
- 229940088710 antibiotic agent Drugs 0.000 claims description 2
- 230000000593 degrading effect Effects 0.000 claims description 2
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 abstract description 27
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- 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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- B01J35/39—
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- B01J35/60—
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/30—Treatment of water, waste water, or sewage by irradiation
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- 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
- C02F2101/38—Organic compounds containing nitrogen
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- 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
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- 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
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- Hydrology & Water Resources (AREA)
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Abstract
The invention discloses a 3D porous structure visible light photocatalytic material and a preparation method and application thereof, wherein a soft template mode is adopted, Mg and Zn are simultaneously doped in carbon nitride in a one-step calcination thermal polymerization mode, and the soft template material is adopted for activation, so that the surface of the material presents a large number of holes, the adsorption efficiency of the material on environmental pollutants is accelerated, the composite efficiency of photoinduced carriers is reduced due to the existence of a confinement effect, the adsorbability is improved, and the visible light degradation capability is improved, so that the degradation capability of the material on the environmental pollutants is improved. The preparation method is simple, the used materials are low in price, safe and environment-friendly, the tetracycline and methylene blue are adsorbed and reduced under the condition of visible light, the visible light catalysis efficiency is high, and the preparation method has the potential of large-scale industrial production application.
Description
Technical Field
The invention relates to the technical field of visible light photocatalytic materials, in particular to a 3D porous structure visible light photocatalytic material and a preparation method and application thereof.
Background
At present, carbon nitride (g-C)3N4) ByDue to the characteristics of good stability, moderate forbidden band width (about 2.7eV), easy modification and the like, the photocatalyst is widely concerned by scholars in the field of photocatalysis and is applied to the fields of energy, environment, sanitation and the like. However, factors such as easy recombination of photo-induced carriers, narrow specific surface area and the like of the material weaken the photocatalytic activity of the material. Carbon nitride is often synthesized by thermal polymerization and belongs to a two-dimensional material, but due to strong interaction between layers, the two-dimensional material is obviously stacked and is not easy to strip. In recent years, the idea of introducing a porous structure into carbon nitride to increase the specific surface area thereof has been widely accepted by researchers.
The porous structure is a commonly used strategy for improving the specific surface area of the catalyst, and common pore channels are classified into micropores (the pore diameter is less than 2nm), mesopores (the pore diameter is between 2 and 50nm) and macropores (the pore diameter is more than 50 nm). The porous structure can improve the specific surface area of the catalyst and increase the contact probability of the substrate and the catalyst, and meanwhile, the adsorption capacity of the catalyst with the porous structure to the substrate is better than that of a solid material. The soft template method usually uses polymer filled carbon nitride, and has the influence of high temperature in the preparation process, and the filler is decomposed to form the pore channels.
Disclosure of Invention
The invention aims to provide a visible light photocatalytic material with a 3D porous structure and a preparation method and application thereof
The magnesium-zinc doped carbon nitride with the 3D porous structure and a large number of pore channels is synthesized by a thermal polymerization method as a soft template material, so that the defects of carbon nitride adsorption performance, wide forbidden band width, quick compounding of photo-excited carriers and the like in the prior art are overcome, the visible light photocatalytic activity of the carbon nitride is improved, and the adsorption and degradation efficiency of environmental pollutants is improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a preparation method of a visible light photocatalytic material with a 3D porous structure, which comprises the following steps:
(1) dissolving a nitrogen carbon source, a proper amount of magnesium ions and zinc ions in deionized water, adding a proper amount of soft template material, boiling and evaporating the obtained solution, and then grinding a dried sample into powder;
(2) and calcining the obtained powder in a muffle furnace, preserving heat, and cooling to room temperature to obtain the visible light photocatalytic material with the 3D porous structure.
Further, the nitrogen carbon source is any one of urea, melamine or thiourea.
Further, the magnesium ion may be provided by any one of magnesium chloride, magnesium sulfate, magnesium acetate or magnesium nitrate, and the zinc ion may be provided by any one of zinc chloride, zinc sulfate, zinc acetate or zinc nitrate.
Furthermore, the total metal addition amount of magnesium and zinc is 1-5% of the mass of the nitrogen-carbon source, and the ratio of Mg to Zn is 20: 1-1: 1.
Preferably, the total metal addition amount of magnesium and zinc is 3 percent of the mass of the nitrogen-carbon source, the ratio of Mg to Zn is 15: 1.
further, the soft template material is Cetyl Trimethyl Ammonium Bromide (CTAB), polyethylene glycol, or polyethylene glycol,
Any one of them. The molecular weight of the polyethylene glycol can be 1500, 2000, 5000, 20000, and the like. Cetyl Trimethyl Ammonium Bromide (CTAB), polyethylene glycol,
(F127) The water solution can generate a large amount of bubbles when being vibrated and can be used for synthesizing porous materials.
Furthermore, the adding amount of the soft template material is 0.5-25% of the mass of the nitrogen-carbon source.
Preferably, the soft template material is added in an amount of 1.5% by mass of the nitrogen-carbon source.
Further, heating the mixture to 500-550 ℃ in a muffle furnace at a heating rate of 4-8 ℃/min, and calcining for 2-4 h; the heat preservation temperature is set to be 500-550 ℃, and the heat preservation time is set to be 2-4 hours.
Preferably, the mixture is heated to 550 ℃ in a muffle furnace at the heating rate of 5 ℃/min and calcined for 3 h; the heat preservation temperature is set to 550 ℃, and the heat preservation time is set to 3 hours.
In a second aspect, the invention provides a 3D porous structure visible light photocatalytic material prepared by the above preparation method.
In a third aspect, the invention provides an application of the 3D porous structure visible light photocatalytic material prepared by the above preparation method as a functional visible light degradation material in degrading environmental pollutants, wherein the environmental pollutants are at least one of antibiotics and dyes.
Further, the antibiotic is tetracycline; the dye is methylene blue.
Compared with the prior art, the invention provides a 3D porous structure visible light photocatalytic material and a preparation method and application thereof, and the visible light photocatalytic material has the following beneficial effects:
according to the invention, a soft template mode is adopted, Mg and Zn are simultaneously doped in carbon nitride in a one-step calcination thermal polymerization mode, and activation is carried out by CTAB, polyethylene glycol, F127 and the like, so that a large number of holes are formed on the surface of the material, the adsorption efficiency of environmental pollutants is accelerated, the compounding efficiency of photoinduced carriers is reduced due to the existence of a confinement effect, the adsorbability is improved, and the visible light degradation capability is improved, thereby the degradation capability of the material on the environmental pollutants is improved. The preparation method is simple, the used materials are low in price, safe and environment-friendly, the tetracycline and methylene blue are adsorbed and reduced under the condition of visible light, the visible light catalysis efficiency is high, and the preparation method has the potential of large-scale industrial production application.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art 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 for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a scanning electron micrograph of carbon nitride with different compositions: (a) scanning electron micrographs of Mg-doped carbon nitride; (b) scanning electron microscope images of Mg and Zn bimetal doped carbon nitride; (c) scanning electron microscope images of Mg and Zn bimetal doped carbon nitride with PEG1500 as a template; (d) scanning electron microscope images of Mg and Zn bimetal doped carbon nitride with CTAB as a template;
FIG. 2 shows CTAB-g-C3N4The morphological structure analysis of (1): (a) CTAB-g-C3N4Scanning an electron microscope image; (b) CTAB-g-C3N4A transmission electron microscope image; (c) CTAB-g-C3N4Scanning an electron microscope image;
FIG. 3 shows CTAB-g-C3N4An element distribution map;
FIG. 4: (a) the influence of magnesium-zinc bimetal doped carbon nitride activated by different active agents on methylene blue light catalytic activity; (b) influence of CTAB with different contents on the activity of magnesium-zinc bimetal doped carbon nitride;
FIG. 5: degradation profile of tetracycline.
Detailed Description
The technical solutions of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention provides a preparation method of a visible light photocatalytic material with a 3D porous structure, which comprises the following steps:
(1) dissolving a nitrogen carbon source, a proper amount of magnesium ions and zinc ions in deionized water, adding a proper amount of soft template material, boiling and evaporating the obtained solution, and then grinding a dried sample into powder;
(2) and calcining the obtained powder in a muffle furnace, preserving heat, and cooling to room temperature to obtain the visible light photocatalytic material with the 3D porous structure.
Wherein the nitrogen carbon source is any one of urea, melamine or thiourea.
The magnesium ion can be provided by any one of magnesium chloride, magnesium sulfate, magnesium acetate or magnesium nitrate, and the zinc ion can be provided by any one of zinc chloride, zinc sulfate, zinc acetate or zinc nitrate.
The soft template material is Cetyl Trimethyl Ammonium Bromide (CTAB), polyethylene glycol, or polyethylene glycol,
Any one of them. The molecular weight of the polyethylene glycol can be 1500, 2000, 5000, 20000, and the like.
The total metal addition amount of the magnesium and the zinc is 1-5% of the mass of the nitrogen-carbon source, and the ratio of Mg to Zn is 20: 1-1: 1.
The adding amount of the soft template material is 0.5-25% of the mass of the nitrogen-carbon source.
Heating the mixture to 500-550 ℃ in a muffle furnace at a heating rate of 4-8 ℃/min, and calcining for 2-4 h; the heat preservation temperature is set to be 500-550 ℃, and the heat preservation time is set to be 2-4 hours.
The 3D porous structure visible light photocatalytic material prepared by the preparation method can be used as a functional visible light degradation material to be applied to degradation of environmental pollutants. The environmental pollutant is at least one of antibiotic and dye. Specifically, the antibiotic is tetracycline, and the dye is methylene blue.
The present invention is described in further detail below by means of detailed examples.
Description of raw materials: the starting materials and reagents used in the examples and experiments were all commercially available products and were obtained from commercial sources.
Example 1
The embodiment provides a preparation method of a visible light photocatalytic material with a 3D porous structure, which is characterized in that urea is used as a precursor, and carbon nitride is prepared by a thermal polymerization method. The total metal addition of the magnesium and the zinc accounts for 3 percent of the mass of the nitrogen-carbon source, and the ratio of Mg to Zn is 15: 1. Specifically, the preparation method of the visible light photocatalytic material with the 3D porous structure comprises the following steps:
(1) dissolving 20g of urea, 200mg of magnesium chloride and 4.5mg of zinc chloride in 150ml of deionized water, adding 0.3g of cetyltrimethylammonium bromide (CTAB) thereto, boiling the obtained solution and evaporating to obtain yellow crystal blocks, scraping the yellow crystal blocks with a medicine spoon, and grinding into powder without granular sensation in a mortar;
(2) and placing the obtained powder in a muffle furnace, heating to 550 ℃ at the heating rate of 5 ℃/min, calcining for 3h, keeping the temperature at 550 ℃ for 3h after calcining, and cooling to room temperature to obtain yellow solid, namely the 3D porous structure visible light photocatalytic material. The resulting yellow solid was placed in a centrifuge tube and stored in a foil wrapper for future use. The sample was taken and observed by scanning electron microscopy, as shown in FIG. 1 (d).
Example 2
The embodiment provides a preparation method of a visible light photocatalytic material with a 3D porous structure, which is characterized in that urea is used as a precursor, and carbon nitride is prepared by a thermal polymerization method. Specifically, the preparation method of the visible light photocatalytic material with the 3D porous structure comprises the following steps:
(1) dissolving 20g of urea, 200mg of magnesium chloride and 7mg of zinc chloride in 150ml of deionized water, adding 0.3g of cetyltrimethylammonium bromide (CTAB) thereto, boiling the obtained solution and evaporating to obtain yellow crystal blocks, scraping the yellow crystal blocks with a medicine spoon, and grinding into powder without granular sensation in a mortar;
(2) and placing the obtained powder in a muffle furnace, heating to 550 ℃ at the heating rate of 5 ℃/min, calcining for 3h, keeping the temperature at 550 ℃ for 3h after calcining, and cooling to room temperature to obtain yellow solid, namely the 3D porous structure visible light photocatalytic material. The resulting yellow solid was placed in a centrifuge tube and stored in a foil wrapper for future use.
Example 3
The embodiment provides a preparation method of a visible light photocatalytic material with a 3D porous structure, which is characterized in that urea is used as a precursor, and carbon nitride is prepared by a thermal polymerization method. Specifically, the preparation method of the visible light photocatalytic material with the 3D porous structure comprises the following steps:
(1) dissolving 20g of urea, 200mg of magnesium chloride and 4.5mg of zinc chloride in 150ml of deionized water, adding 0.3g of polyethylene glycol 1500(PEG1500) thereto, boiling the obtained solution to evaporate to obtain yellow crystal blocks, scraping the yellow crystal blocks with a medicine spoon, and grinding the yellow crystal blocks into powder without granular sensation in a mortar;
(2) and placing the obtained powder in a muffle furnace, heating to 550 ℃ at the heating rate of 5 ℃/min, calcining for 3h, keeping the temperature at 550 ℃ for 3h after calcining, and cooling to room temperature to obtain yellow solid, namely the 3D porous structure visible light photocatalytic material. The resulting yellow solid was placed in a centrifuge tube and stored in a foil wrapper for future use. The sample was taken and observed by scanning electron microscopy, as shown in FIG. 1 (c).
Example 4
The embodiment provides a preparation method of a visible light photocatalytic material with a 3D porous structure, which is characterized in that urea is used as a precursor, and carbon nitride is prepared by a thermal polymerization method. Specifically, the preparation method of the visible light photocatalytic material with the 3D porous structure comprises the following steps:
(1) 20g of urea, 200mg of magnesium chloride and 4.5mg of zinc chloride were dissolved in 150ml of deionized water, and 0.3g of the solution was added thereto
(F127) Boiling and evaporating the obtained solution to obtain yellow crystal blocks, scraping the yellow crystal blocks out by using a medicine spoon, and grinding the yellow crystal blocks into powder without granular sensation in a mortar;
(2) and placing the obtained powder in a muffle furnace, heating to 550 ℃ at the heating rate of 5 ℃/min, calcining for 3h, keeping the temperature at 550 ℃ for 3h after calcining, and cooling to room temperature to obtain yellow solid, namely the 3D porous structure visible light photocatalytic material. The resulting yellow solid was placed in a centrifuge tube and stored in a foil wrapper for future use.
To verify the beneficial effects of the present invention, the following experiments were conducted.
Weighing the 3D visible light photocatalytic material with the porous structure obtained in the example 1, adding 30mL of deionized water, dispersing for 5min at an ultrasonic power of 150W, adding 8mg/L of methylene blue solution, fixing the stirring speed at 60r/min, and after dark reaction for 60min, carrying out illumination reaction for 90min by an LED lamp of 60W (sampling: 90min, -60min, -45min, -30min, -15min, 0min (dark reaction), 10min, 20min, 30min, 45min, 60min, and 90 min). The results are shown in FIG. 4.
Weighing the 3D visible light photocatalytic material with the porous structure obtained in the example 2, adding 30mL of deionized water, dispersing for 5min at an ultrasonic power of 150W, adding 20mg/L of tetracycline solution, fixing the stirring speed at 60r/min, and after dark reaction for 60min, carrying out illumination reaction for 90min by an LED lamp of 60W (sampling: 90min, -60min, -45min, -30min, -15min, 0min (dark reaction), 10min, 20min, 30min, 45min, 60min, and 90 min). The results are shown in FIG. 5.
As can be seen from fig. 1, after the metal is doped, the surface of the carbon nitride does not have large pores, when the metal is modified by using templates such as PEG, CTAB and the like, pores are formed on the surface layer of the carbon nitride, and a large number of pores are formed on the surface layer of the carbon nitride after the CTAB treatment, so that the photocatalytic activity of the carbon nitride can be improved to a certain extent due to the presence of the pores.
As can be seen from FIGS. 2 and 3, the transmission electron microscope showed CTAB-g-C3N4A large number of short rod-like structures are present. In the SEM-mapping results, CTAB-g-C was observed3N4Is composed of four elements of carbon, nitrogen, magnesium and zinc, which respectively correspond to four colors of red (see upper left small diagram in fig. 3), blue (see upper right small diagram in fig. 3), yellow (see lower left small diagram in fig. 3) and dark green (see lower right small diagram in fig. 3), wherein the content of characters in fig. 3 is 3070, Ch1, MAG: 10000x, HV: 10kV, WD:7.8mm, ratio of 6 μm, and no color accumulation in the figure, which shows that carbon, nitrogen, magnesium and zinc are uniformly distributed, wherein magnesium and zinc are uniformly doped in CTAB-g-C3N4In (1).
As can be seen from FIG. 4, for CTAB-g-C3N4、PEG1500-g-C3N4、PEG2000-g-C3N4、PEG5000-g-C3N4、PEG20000-g-C3N4、Pluronic F127-g-C3N4The activity of photodegradation of methylene blue was tested for 6 samples. Polyethylene glycol (molecular weight 15)00. 2000, 5000 and 20000) the degradation rate of activated magnesium-zinc bimetal doped carbon nitride to methylene blue is 89.77%, 88.84%, 88.02% and 89.76%, and the data result shows that the molecular weight of polyethylene glycol has no interference to the activity of carbon nitride to degrade methylene blue.
As can be seen from FIG. 5, the characteristic absorption peak of tetracycline at 377nm tended to decrease during the dark reaction period (-30min to 0min), the decrease was significant during the dark reaction period (-30min to-15 min), and only a small decrease was observed during the time period (-15min to 0min), indicating that tetracycline had been CTAB-g-C during the dark reaction period3N4The adsorption reached saturation. When entering the photoreaction stage, tetracycline degrades rapidly, almost completely at 20 min.
Therefore, the surface of the visible light photocatalytic material with the 3D porous structure prepared by the invention presents a large number of holes, so that the adsorption efficiency of the visible light photocatalytic material on environmental pollutants is accelerated, the composite efficiency of photoinduced carriers is reduced due to the existence of the confinement effect, the adsorbability is improved, and the visible light degradation capability is improved, so that the degradation capability of the visible light photocatalytic material on the environmental pollutants is improved. The preparation method is simple, the used materials are low in price, safe and environment-friendly, and the tetracycline and methylene blue which are adsorbed and reduced in price under the condition of visible light have excellent performance, and have the potential of being applied to large-scale production and industrialization.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A preparation method of a 3D porous structure visible light photocatalytic material is characterized by comprising the following steps:
(1) dissolving a nitrogen carbon source, a proper amount of magnesium ions and zinc ions in deionized water, adding a proper amount of soft template material, boiling and evaporating the obtained solution, and then grinding a dried sample into powder;
(2) and calcining the obtained powder in a muffle furnace, preserving heat, and cooling to room temperature to obtain the visible light photocatalytic material with the 3D porous structure.
2. The method of claim 1, wherein: the nitrogen carbon source is any one of urea, melamine or thiourea.
3. The method of claim 1, wherein: the magnesium ion can be provided by any one of magnesium chloride, magnesium sulfate, magnesium acetate or magnesium nitrate, and the zinc ion can be provided by any one of zinc chloride, zinc sulfate, zinc acetate or zinc nitrate.
4. The method of claim 1, wherein: the total metal addition amount of the magnesium and the zinc is 1-5% of the mass of the nitrogen-carbon source, and the ratio of Mg to Zn is 20: 1-1: 1.
5. The method of claim 1, wherein: the soft template material is cetyl trimethyl ammonium bromide, polyethylene glycol,
Any one of F127.
6. The method of claim 1, wherein: the adding amount of the soft template material is 0.5-25% of the mass of the nitrogen-carbon source.
7. The method of claim 1, wherein: heating the mixture to 500-550 ℃ in a muffle furnace at a heating rate of 4-8 ℃/min, and calcining for 2-4 h; the heat preservation temperature is set to be 500-550 ℃, and the heat preservation time is set to be 2-4 hours.
8. The 3D porous structure visible light photocatalytic material prepared by the preparation method of any one of claims 1 to 7.
9. The application of the 3D porous structure visible light photocatalytic material prepared by the preparation method of any one of claims 1 to 7 as a functional visible light degradation material in degrading environmental pollutants, wherein the environmental pollutants are at least one of antibiotics and dyes.
10. Use according to claim 9, characterized in that: the antibiotic is tetracycline; the dye is methylene blue.
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