CN108654673B - Novel photocatalytic material and preparation method and application thereof - Google Patents
Novel photocatalytic material and preparation method and application thereof Download PDFInfo
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- CN108654673B CN108654673B CN201810433343.5A CN201810433343A CN108654673B CN 108654673 B CN108654673 B CN 108654673B CN 201810433343 A CN201810433343 A CN 201810433343A CN 108654673 B CN108654673 B CN 108654673B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- OERNJTNJEZOPIA-UHFFFAOYSA-N zirconium nitrate Chemical compound [Zr+4].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O OERNJTNJEZOPIA-UHFFFAOYSA-N 0.000 claims abstract description 81
- 239000011941 photocatalyst Substances 0.000 claims abstract description 45
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 39
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- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 21
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- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 abstract description 8
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- IHCCLXNEEPMSIO-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperidin-1-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1CCN(CC1)CC(=O)N1CC2=C(CC1)NN=N2 IHCCLXNEEPMSIO-UHFFFAOYSA-N 0.000 description 1
- MGGVALXERJRIRO-UHFFFAOYSA-N 4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-2-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-1H-pyrazol-5-one Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C=1C(=NN(C=1)CC(=O)N1CC2=C(CC1)NN=N2)O MGGVALXERJRIRO-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/24—Nitrogen compounds
-
- B01J35/39—
-
- 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
- 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
- C02F2101/308—Dyes; Colorants; Fluorescent agents
-
- 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 discloses a novel photocatalystChemical material and its preparation method and application. The material being tetragonal phase ZrO2Nanoparticle modified g-C3N4The organic photocatalyst is prepared and synthesized by using melamine and zirconium nitrate as raw materials and adopting a one-step calcining method in air. Tetragonal phase ZrO adhered to the surface of the catalyst2The nano particles obviously change the electronic structure and the photocatalytic activity of the nano particles, so that tetragonal-phase ZrO is attached2Lamellar g-C after nanoparticles3N4The photocatalytic activity of the material for degrading rhodamine B and decomposing water under the irradiation of visible light is greatly enhanced. Phase g-C of phase3N4The efficiency of the photocatalyst for degrading rhodamine B by visible light is improved by 1.5-14.4 times, and the efficiency of degrading water by visible light is improved by 1.14-2.53 times. Tetragonal phase ZrO of comparable zero catalytic efficiency2The performance of the catalyst is obviously improved. In addition, the method has mild conditions and simple operation, and is beneficial to large-scale production.
Description
Technical Field
The invention belongs to the technical field of catalyst materials, relates to a novel photocatalytic material, and a preparation method and application thereof, and particularly relates to tetragonal-phase ZrO2Nanoparticle modified layered g-C3N4A photocatalyst and a preparation method and application thereof.
Background
The photocatalyst is a material which can absorb sunlight and can play a catalytic role under the excitation of photons. So far, various catalysts are widely applied to the aspects of treating atmospheric pollutants, sewage, preparing hydrogen by photocatalytic water splitting, storing energy and the like due to the excellent characteristics of the catalysts. With the development of the global industrial field and the massive use of the fossil fuel in daily life in recent years, the pollution of the atmosphere and water bodies becomes more serious, and the energy problem is more tense, which will affect the sustainable development of the human society. Many related technologies are developed to solve the problems of environmental pollution and energy crisis, and it is one of the most effective methods to solve the problems of environmental pollution and energy crisis by combining the characteristics of photocatalyst and using clean and sufficient solar energy to degrade the pollution in the atmosphere and water and decompose water to produce hydrogen, store energy and the like.
g-C3N4The catalyst is an ideal catalytic material, consists of C, N two elements which are extremely rich on earth, is very cheap, has the forbidden bandwidth of 2.70eV, and is compared with the traditional transition metal oxide (such as TiO)2Has a forbidden band width of 3.20eV and ZnO2Having a forbidden band width of 3.40eV), sulfides, etc., which exhibit higher light absorption capacity, particularly in the visible portion of sunlight, while having high photochemical stability and excellent photoelectronic properties. In addition, it has more active sites and a larger specific surface area. g-C3N4The catalyst can utilize solar energy to catalyze and degrade organic pollutants without modification, which shows that the catalyst has wide application prospect in treating environmental pollution. However, in dealing with some practical problems, its catalytic performance is far from meeting the requirements of practical production. Thus, a solution of g-C is prepared3N4The photocatalyst is a substrate, has simple preparation method, high catalytic performance and low price, and can be applied to long-term market application prospect. Preparing tetragonal-phase ZrO by one-step calcination method2Nanoparticle regulated lamellar g-C3N4Photocatalyst materials and the aspects of photocatalytic degradation of organic matters and hydrogen production by decomposing water have not been reported yet.
Disclosure of Invention
The invention aims to provide a novel photocatalytic material and a preparation method and application thereof, in particular to tetragonal-phase ZrO2Nanoparticle modified layered g-C3N4Photocatalyst and preparation and application thereof. The preparation method of the photocatalyst material is simple and feasible, and the tetragonal-phase ZrO is presented2Nanoparticle regulated lamellar g-C3N4The photocatalyst material can increase the photocatalytic active site, improve the separation rate of photon-generated carriers, reduce the recombination and have higher photocatalytic activity.
In order to achieve the purpose, the invention adopts the following technical scheme:
tetragonal phase ZrO of the present invention2Nanoparticle regulated lamellar g-C3N4The photocatalyst material is synthesized by adopting a one-step calcination method. The preparation method comprises the following steps: firstly, melamine and zirconium nitrate are used as precursors, then the precursors are calcined in the air atmosphere to obtain an initial photocatalyst material sample, then washing and drying are carried out, and finally tetragonal-phase ZrO is obtained2Nanoparticle modified layered g-C3N4A photocatalyst material.
Several materials were prepared as follows:
1) pure phase g-C3N4The preparation of (1): calcining melamine serving as a raw material at 450-650 ℃ for 2-6 h in an air atmosphere, controlling the temperature rise to be 2-10 ℃/min, cooling to room temperature, and taking out to obtain g-C3N4And (3) powder.
2) Pure ZrO2The preparation of (1): zirconium nitrate is used as a raw material, the zirconium nitrate is calcined for 1-8 hours at 450-650 ℃ in the air atmosphere, the temperature rise is controlled to be 2-10 ℃/min, the zirconium nitrate is cooled to the room temperature and then taken out to obtain ZrO2And (3) powder.
3) Tetragonal phase ZrO of the present invention2Nanoparticle modified g-C3N4Preparation of photocatalyst material: melamine and zirconium nitrate are used as raw materials, are calcined in air in one step, and then are washed, centrifuged and dried to obtain tetragonal-phase ZrO2Nanoparticle modified layered g-C3N4An organic photocatalyst. Preferably, the mass ratio of the melamine to the zirconium nitrate is 10 (1-9), the mixture is fully ground in a mortar for 10-30 min, then the mixture is calcined for 2-6 h at 450-650 ℃ in the air atmosphere, the temperature rise is controlled to be 2-10 ℃/min,cooling to room temperature, taking out, fully washing with deionized water, centrifuging, and drying to obtain tetragonal-phase ZrO2Nanoparticle modified layered g-C3N4Photocatalyst material final sample.
In the above technical scheme, the calcination temperature in the method 1), 2), 3) is preferably 500-600 ℃, and more preferably 550 ℃.
The calcination time is preferably 4 hours.
The heating rate is preferably 3-6 ℃/min, and more preferably 5 ℃/min.
The mass ratio of melamine to zirconium nitrate in the method 3) is preferably 3:2 to 7:3, and the tetragonal-phase ZrO prepared by the method2Nanoparticle modified layered g-C3N4The photocatalyst has higher photocatalytic efficiency.
The photocatalytic material can be applied to degrading organic pollutants and decomposing water to produce hydrogen.
The invention provides tetragonal phase ZrO2Nanoparticle regulated lamellar g-C3N4A photocatalyst material. During the calcination, g-C is formed due to the thermal decomposition of melamine3N4Promote ZrO2The phase formed is transferred. Pure ZrO obtained by Process 2)2ZrO in the sample of the photocatalyst obtained by the method 3) which coexists in the tetragonal phase and the monoclinic phase2Only tetragonal phase is present and attached to g-C3N4ZrO of surface2The particle size is only about 50 nm. Thus ZrO2Present in g-C3N4Surface will be g-C3N4The electronic structure and active sites of the surface are changed. Meanwhile, the separation rate of the photo-generated electrons and the holes of the catalyst under the illumination condition is enhanced. The photocatalytic activity is thereby significantly increased. Experimental results show that the tetragonal-phase ZrO provided by the invention2Nanoparticle-regulated layered nano g-C3N4The degradation rate of the organic photocatalyst to rhodamine B is higher than that of pure phase g-C under the irradiation of visible light3N4The photocatalyst is improved by 1.5-14.4 times, and the tetragonal-phase ZrO provided by the invention2Nanoparticle regulated lamellar g-C3N4The yield of hydrogen production by decomposing water by the photocatalyst under the irradiation of visible light is compared with that of pure phase g-C3N4The organic photocatalyst is improved by 1.14-2.53 times. And phase-pure ZrO2The rhodamine B is not degraded, and the hydrogen production by decomposing water is zero.
Compared with the conventional method for preparing the composite photocatalyst, the method has the following advantages: 1) the preparation process is simple; 2) the preparation conditions are mild; 3) during the preparation process, ZrO is promoted2The phase transition of (a) is such that a tetragonal phase which could not exist stably at room temperature alone exists stably at room temperature and the particle sizes are all around 50 nm.
The method provided by the invention can obtain tetragonal-phase ZrO under a milder condition2Nanoparticle modified (also referred to as modulated or modified) lamellar g-C3N4The photocatalyst material is simple and easy to operate, and can be used for large-scale production.
Drawings
FIG. 1 is a pictorial representation of a product made in accordance with an embodiment of the present invention;
FIG. 2 is an XRD pattern of a product prepared by an example of the present invention;
FIG. 3 is a UV-vis spectrum of a product prepared by an example of the present invention;
FIG. 4 is a FT-IR plot of a product made by an example of the invention;
FIG. 5 is a TEM image of a product prepared by an example of the present invention;
FIG. 6 is a high resolution TEM image of a product prepared by an example of the present invention;
Detailed Description
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention in conjunction with the following examples, but it will be understood that the description is intended to illustrate the features and advantages of the invention further and is not intended to limit the invention.
The invention provides tetragonal phase ZrO2Nanoparticle modified layered g-C3N4The preparation method of the photocatalyst material comprises the following steps: melamine and zirconium nitrate are used as precursors, and the initial sample is obtained by calcining in airThen washing and drying to obtain the final tetragonal-phase ZrO2Nanoparticle modified layered g-C3N4Photocatalyst material samples. The calcination process in the scheme is the key of the scheme, and the ratio of melamine as a precursor to zirconium nitrate, the calcination time and the calcination temperature are important conditions.
Tetragonal phase ZrO prepared by the invention2Nanoparticle modified layered g-C3N4The photocatalyst material has a forbidden band width of 2.60eV, has certain absorption capacity within a range of 600-800 nm, can greatly absorb visible light, and has excellent visible light catalytic performance. And tetragonal phase ZrO2Nanoparticle modified layered g-C3N4The photocatalyst material has rich active sites and specific surface area, and can effectively inhibit the recombination of photon-generated carriers. Therefore, under the same experimental conditions, tetragonal-phase ZrO2Nanoparticle modified layered g-C3N4The visible light catalytic effect of the photocatalyst material is pure g-C3N4The visible light catalysis effect of the photocatalyst is 3.5-14.4 times. Further, tetragonal phase ZrO produced by the present invention2Nanoparticle modified layered g-C3N4The photocatalyst has stable effect and no inactivation phenomenon in the use process.
Compared with the prior art, the method has the advantages of simple process, low raw material price, reduction of production cost and easy realization of industrial application. The visible light catalyst prepared by the invention can be used for treating water pollution, and has great application potential in the aspects of air pollution treatment, hydrogen production by photolysis of water, solar cells, catalytic carriers and the like.
The chemical reagents used in the examples of the present invention are commercially available, as described below with reference to specific examples.
Example 1
Weighing 5g of melamine, placing the melamine in a crucible, tightly covering the crucible, placing the crucible in a muffle furnace for calcination at the temperature of 550 ℃ for 5 hours, and taking out the melamine at room temperature to obtain pure phase g-C3N4。
As shown in fig. 1, C is g-C prepared for the practice of the present invention3N4The real object diagram of (1).
As shown by line a in FIG. 2, g-C prepared for the practice of the present invention3N4XRD pictures of (A) show that g-C is prepared3N4Has graphite phase crystal form.
As shown by line b in fig. 3, is a layered g-C prepared in accordance with the practice of the present invention3N4Ultraviolet-visible absorption spectrum of (A), indicating that the prepared layered g-C3N4Can absorb visible light and has certain absorption capacity within the range of 600-800 nm.
Example 2
Weighing 5g of zirconium nitrate, placing the zirconium nitrate into a crucible, tightly covering the crucible and placing the crucible into a muffle furnace for calcination, wherein the calcination temperature is 550 ℃, the calcination time is 5 hours, and taking out the zirconium nitrate at room temperature to obtain pure-phase ZrO2。
As shown in a in FIG. 1, ZrO prepared for the practice of the present invention2A real object diagram of (1);
as shown by the line c in FIG. 2, the ZrO prepared for the practice of the present invention2The XRD picture of (a) shows that ZrO prepared by directly calcining zirconium nitrate2Has the characteristic of coexistence of monoclinic phase and tetragonal phase.
As shown by the line c in FIG. 3, the ZrO prepared for the practice of the present invention2Ultraviolet-visible absorption spectrum of (A), indicating that ZrO was prepared2Hardly absorbs visible light and has a certain absorption capacity only in the ultraviolet range.
Example 3
Weighing 5g of melamine and 2.5g of zirconium nitrate (mass ratio, melamine: zirconium nitrate is 2:1) in a crucible, tightly covering, calcining in a muffle furnace at 550 ℃ for 5h, and taking out at room temperature to obtain initial tetragonal-phase ZrO2Nanoparticle regulated lamellar g-C3N4Then, the sample is fully washed, centrifuged and dried by deionized water to obtain tetragonal-phase ZrO2Nanoparticle regulated lamellar g-C3N4Photocatalyst material final sample.
As shown by line b in FIG. 2, tetragonal phase ZrO prepared for the practice of the present invention2Nanoparticle modified layered g-C3N4XRD picture of (1) shows thatTo the sample contains a layer of g-C3N4And ZrO2Nano-particles and essentially only tetragonal phase ZrO present2。
As shown by line a in FIG. 3, for the practice of the present invention, tetragonal phase ZrO was prepared2Nanoparticle modified layered g-C3N4Ultraviolet-visible absorption spectrum of (A), indicating that the prepared tetragonal phase ZrO2Nanoparticle modified layered g-C3N4Can absorb visible light, has certain absorption capacity within the range of 600-800 nm, and has stronger absorption than that of b and c lines.
As shown by line a in FIG. 4, tetragonal phase ZrO prepared for the practice of the present invention2Nanoparticle modified layered g-C3N4FTIR spectrum of (a), indicating the prepared lamellar g-C3N4ZrO having tetragonal phase loaded thereon2。
FIGS. 5 and 6 show tetragonal phase ZrO prepared by the practice of the present invention2Nanoparticle regulated lamellar g-C3N4TEM image of (B) shows prepared g-C3N4ZrO containing tetragonal phase therein2。
Example 4
Weighing 5g of melamine and 0.5g of zirconium nitrate (mass ratio, melamine: zirconium nitrate is 10:1) in a crucible, tightly covering, calcining in a muffle furnace at 550 ℃ for 5h, and taking out at room temperature to obtain initial tetragonal-phase ZrO2Regulated g-C3N4Then, the sample is fully washed, centrifuged and dried by deionized water to obtain tetragonal-phase ZrO2Regulated g-C3N4Photocatalyst material final sample.
Example 5
Weighing 5g of melamine and 1g of zirconium nitrate (mass ratio, melamine: zirconium nitrate is 5:1) and placing the melamine and the zirconium nitrate into a crucible, tightly covering the crucible and placing the crucible into a muffle furnace for calcination at 550 ℃ for 5h, and taking out the mixture at room temperature to obtain the initial tetragonal-phase ZrO2Regulated g-C3N4Then, the sample is fully washed, centrifuged and dried by deionized water to obtain tetragonal-phase ZrO2Regulated g-C3N4Photocatalyst and process for producing the sameMaterial final samples.
Example 6
Weighing 5g of melamine and 1.67g of zirconium nitrate (mass ratio, melamine: zirconium nitrate is 3:1) in a crucible, tightly covering, calcining in a muffle furnace at 550 ℃ for 5h, and taking out at room temperature to obtain initial tetragonal-phase ZrO2Regulated g-C3N4Then, the sample is fully washed, centrifuged and dried by deionized water to obtain tetragonal-phase ZrO2Regulated g-C3N4Photocatalyst material final sample.
Example 7
Weighing 5g of melamine and 2.14g of zirconium nitrate (mass ratio, melamine: zirconium nitrate is 7:3) in a crucible, tightly covering, calcining in a muffle furnace at 550 ℃ for 5h, and taking out at room temperature to obtain initial tetragonal-phase ZrO2Nanoparticle regulated g-C3N4Then, the sample is fully washed, centrifuged and dried by deionized water to obtain tetragonal-phase ZrO2Regulated g-C3N4Photocatalyst material final sample.
Example 8
Weighing 5g of melamine and 2.69g of zirconium nitrate, placing the melamine and zirconium nitrate into a crucible (mass ratio, melamine: zirconium nitrate is 13:7), tightly covering the crucible, placing the crucible into a muffle furnace for calcination at 550 ℃ for 5h, and taking out the crucible at room temperature to obtain initial tetragonal-phase ZrO2Regulated g-C3N4Then, the sample is fully washed, centrifuged and dried by deionized water to obtain tetragonal-phase ZrO2Regulated g-C3N4Photocatalyst material final sample.
Example 9
Weighing 5g of melamine and 3.33g of zirconium nitrate (mass ratio, melamine: zirconium nitrate is 3:2) in a crucible, tightly covering, calcining in a muffle furnace at 550 ℃ for 5h, and taking out at room temperature to obtain initial tetragonal-phase ZrO2Regulated g-C3N4Then, the sample is fully washed, centrifuged and dried by deionized water to obtain tetragonal-phase ZrO2Regulated g-C3N4Photocatalyst material final sample. Example 7
Example 10
Weighing 5g of melamine and 4g of zirconium nitrate (mass ratio, melamine: zirconium nitrate is 5:4) and placing the melamine and zirconium nitrate into a crucible, tightly covering the crucible and placing the crucible into a muffle furnace for calcination at 550 ℃ for 5h, and taking out the mixture at room temperature to obtain the initial tetragonal-phase ZrO2Regulated g-C3N4Then, the sample is fully washed, centrifuged and dried by deionized water to obtain tetragonal-phase ZrO2Regulated g-C3N4Photocatalyst material final sample.
Example 11
Weighing 5g of melamine and 4.5g of zirconium nitrate (mass ratio, melamine: zirconium nitrate is 10:9) in a crucible, tightly covering, calcining in a muffle furnace at 550 ℃ for 5h, and taking out at room temperature to obtain initial tetragonal-phase ZrO2Regulated g-C3N4Then, the sample is fully washed, centrifuged and dried by deionized water to obtain tetragonal-phase ZrO2Regulated g-C3N4Photocatalyst material final sample.
Respectively carrying out activity tests on the visible-light catalysts prepared in the embodiments 1-11, wherein the target pollutant is a typical water pollutant rhodamine B:
the experimental conditions were as follows: the initial concentration of the rhodamine B solution is 10mg/L, the volume is 100mL, the dosage of the catalyst is 0.1g, a xenon lamp with the power of 500W is adopted as a light source, and ultraviolet light is filtered through a 400nm optical filter. Before the photocatalytic reaction, the catalyst and the rhodamine B solution are fully stirred for 30 minutes under the dark room condition, and then the photocatalytic reaction is started. The change of the concentration of the rhodamine B solution along with the illumination time is measured by an ultraviolet-visible spectrophotometer. Pure phase g-C prepared by using melamine as precursor3N4The visible light catalytic activity of the organic photocatalyst is reference 1, and the test results are shown in table 1.
| Numbering | Mass ratio (melamine: zirconium nitrate) | Visible light catalytic activity |
| Example 1 | Melamine | 1 |
| Example 2 | Zirconium nitrate | Is free of |
| Example 3 | 2:1 | 14.4 |
| Example 4 | 3:1 | 3.5 |
| Example 5 | 10:1 | 1.7 |
| Example 6 | 5:1 | 2.3 |
| Example 7 | 7:3 | 9.2 |
| Example 8 | 13:7 | 12.5 |
| Example 9 | 3:2 | 11.9 |
| Example 10 | 5:4 | 3.2 |
| Example 11 | 10:9 | 1.5 |
The above tetragonal phase ZrO provided by the invention2Nanoparticle regulated lamellar g-C3N4The preparation of the photocatalyst and its application are described in detail, the principle and the embodiments of the present invention are illustrated by the specific examples, and the above description is only for the purpose of helping understanding the method of the present invention and the core idea thereof, it should be noted that, for those skilled in the art, it is possible to make various modifications and adjustments to the present invention without departing from the principle of the present invention, and the modifications and adjustments also fall within the protection scope of the claims of the present invention.
Claims (7)
1. A novel photocatalytic material is characterized in that the material is tetragonal-phase ZrO2Nanoparticle modified layered g-C3N4The organic photocatalyst is synthesized by adopting a one-step calcination method, and the preparation method comprises the steps of taking melamine and zirconium nitrate as raw materials, calcining the raw materials in air in one step, washing, centrifuging and drying the calcined raw materials to obtain tetragonal-phase ZrO2Nanoparticle modified layered g-C3N4Organic compoundsThe photocatalyst comprises melamine and zirconium nitrate, wherein the mass ratio of the melamine to the zirconium nitrate is 10 (1-9).
2. The novel photocatalytic material as set forth in claim 1, wherein the mass ratio of melamine to zirconium nitrate is 3:2 to 7: 3.
3. The novel photocatalytic material of claim 1, wherein the calcination temperature is 450-650 ℃ and the calcination time is 2-6 hours.
4. The novel photocatalytic material of claim 3, wherein the calcination temperature is 550 ℃.
5. The novel photocatalytic material according to claim 1, wherein the temperature rise rate during calcination is 2 to 10 ℃/min.
6. The novel photocatalytic material according to claim 5, wherein the temperature increase rate at the time of calcination is 5 ℃/min.
7. Use of a novel photocatalytic material as claimed in any one of claims 1 to 6, characterized in that the photocatalytic material is used for the degradation of organic pollutants by visible light.
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