Cu3Mo2O9/BiVO4Nano heterostructure composite material and preparation method and application thereof
阅读说明：本技术 一种Cu3Mo2O9/BiVO4纳米异质结构复合材料及其制备方法和应用 (Cu3Mo2O9/BiVO4Nano heterostructure composite material and preparation method and application thereof ) 是由 邹长伟 刘文仲 项燕雄 于 2020-12-07 设计创作，主要内容包括：本发明提供了一种Cu_3Mo_2O_9/BiVO_4纳米异质结构复合材料及其制备方法和应用,涉及纳米半导体复合材料技术领域。本发明提供的Cu_3Mo_2O_9/BiVO_4纳米异质结构复合材料包括具有十面体结构的BiVO_4和负载在所述BiVO_4表面的Cu_3Mo_2O_9纳米颗粒。在本发明中,BiVO_4与Cu_3Mo_2O_9复合形成异质结构,促进了光生电子与空穴的分离,降低了光生电子与空穴复合的几率,拓宽了光响应范围,提高了复合材料的光催化性能,与纯相BiVO_4相比,具有更强的可见光响应、更低的光生载流子复合率,更好的可见光催化降解性能和良好的循环性能,具有良好的应用前景。(The invention provides a Cu 3 Mo 2 O 9 /BiVO 4 A nano heterostructure composite material and a preparation method and application thereof relate to the technical field of nano semiconductor composite materials. Cu provided by the invention 3 Mo 2 O 9 /BiVO 4 Nano meterThe heterostructure composite material comprises BiVO with decahedral structure 4 And is loaded on the BiVO 4 Cu of surface 3 Mo 2 O 9 And (3) nanoparticles. In the present invention, BiVO 4 And Cu 3 Mo 2 O 9 The composition forms a heterostructure, promotes the separation of photoproduction electrons and holes, reduces the probability of the composition of the photoproduction electrons and the holes, widens the photoresponse range, improves the photocatalysis performance of the composite material, and is compatible with pure phase BiVO 4 Compared with the prior art, the material has stronger visible light response, lower photon-generated carrier recombination rate, better visible light catalytic degradation performance and good cycle performance, and has good application prospect.)
1. Cu3Mo2O9/BiVO4Nano-heterostructure composite material comprising BiVO having a decahedral structure4And is loaded on the BiVO4Cu of surface3Mo2O9And (3) nanoparticles.
2. Cu according to claim 13Mo2O9/BiVO4Nano-heterostructure composite material, characterized in that the Cu3Mo2O9The loading amount of the nanoparticles is 2.0-12.0 wt%.
3. Cu according to claim 23Mo2O9/BiVO4Nano-heterostructure composite material, characterized in that the Cu3Mo2O9The particle size of the nano-particles is 50-180 nm.
4. Cu according to claim 13Mo2O9/BiVO4A nano heterostructure composite material, wherein the BiVO is4The particle size of (A) is 1.5 to 2 μm.
5. Cu as claimed in any one of claims 1 to 43Mo2O9/BiVO4The preparation method of the nano heterostructure composite material comprises the following steps:
BiVO (bismuth oxide) is added4And Cu (CH)3COO)2Dispersing in water to obtain mixed dispersion liquid;
mixing Na2MoO4Adding the aqueous solution into the mixed dispersion, coprecipitating and filtering to obtain a precursor;
calcining the precursor to obtain Cu3Mo2O9/BiVO4A nano-heterostructure composite material.
6. The method according to claim 5, wherein the BiVO is BiVO4、Cu(CH3COO)2And Na2MoO4The mass ratio of (1): (0.021-0.12): (0.023 to 0.14).
7. The preparation method according to claim 5, wherein the temperature of the coprecipitation is 10 to 40 ℃ and the time is 30 to 40 min.
8. The preparation method according to claim 5, wherein the calcination is carried out at a temperature of 400 to 500 ℃ for 1.5 to 3 hours.
9. Cu as claimed in any one of claims 1 to 43Mo2O9/BiVO4Nano-heterostructure composite material or according to claim 5 to E8 Cu produced by the production method of any one of3Mo2O9/BiVO4The application of the nano heterostructure composite material in photocatalytic degradation of organic pollutants.
Technical Field
The invention relates to the technical field of nano semiconductor composite materials, in particular to Cu3Mo2O9/BiVO4A nano heterostructure composite material and a preparation method and application thereof.
Background
The semiconductor photocatalytic degradation technology is a new pollution treatment technology, has the advantages of environmental protection, sustainability, low secondary pollution and the like, and generates photo-generated electrons and hole pairs under the illumination condition based on the characteristic that a semiconductor material with a proper energy band structure generates valence band electrons to excite and jump to a conduction band under illumination so as to directly or indirectly perform degradation reaction with organic pollutants in a system liquid phase to achieve the purpose of pollution treatment.
The existing semiconductor material mainly comprises TiO2、BiOCl、BiVO4、Bi2WO6、ZnS、Bi2MoO6、CdS、C3N4Etc., however, the following problems exist in the photocatalytic degradation process of the above materials: the material has weak response to visible light, weak adsorption effect, high recombination rate of photo-generated electrons and holes and poor cycle performance.
Disclosure of Invention
In view of the above, the present invention provides a Cu3Mo2O9/BiVO4Nano heterostructure composite material, preparation method and application thereof, and Cu provided by the invention3Mo2O9/BiVO4The nano heterostructure composite material has strong response to visible light, low recombination rate of photo-generated electrons and holes and good cycle performance.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a Cu3Mo2O9/BiVO4Nano-heterostructure composite material comprising BiVO having a decahedral structure4And is loaded on the BiVO4Cu of surface3Mo2O9And (3) nanoparticles.
Preferably, the Cu3Mo2O9The loading amount of the nanoparticles is 2-12 wt%.
Preferably, the Cu3Mo2O9The particle size of the nano-particles is 50-180 nm.
Preferably, the BiVO4The particle size of (A) is 1.5 to 2 μm.
The invention also provides the Cu of the technical scheme3Mo2O9/BiVO4The preparation method of the nano heterostructure composite material comprises the following steps:
BiVO (bismuth oxide) is added4And Cu (CH)3COO)2Dispersing in water to obtain mixed dispersion liquid;
mixing Na2MoO4Adding the aqueous solution into the mixed dispersion, coprecipitating and filtering to obtain a precursor;
calcining the precursor to obtain Cu3Mo2O9/BiVO4A nano-heterostructure composite material.
Preferably, the BiVO4、Cu(CH3COO)2、Na2MoO4The mass ratio of (1): (0.021-0.12): (0.023 to 0.14).
Preferably, the temperature of the coprecipitation is 10-40 ℃, and the time is 30-40 min.
Preferably, the calcining temperature is 400-500 ℃ and the calcining time is 1.5-3 h.
The invention also provides Cu in the technical scheme3Mo2O9/BiVO4Nano heterostructure composite material or Cu prepared by preparation method in technical scheme3Mo2O9/BiVO4The application of the nano heterostructure composite material in photocatalytic degradation of organic pollutants.
The invention also provides Cu3Mo2O9/BiVO4The preparation method of the nano heterostructure composite material comprises the following steps: BiVO (bismuth oxide) is added4And Cu (CH)3COO)2Dispersing in water to obtain mixed dispersion liquid; mixing Na2MoO4Adding the aqueous solution into the mixed dispersion, coprecipitating and filtering to obtain a precursor; calcining the precursor to obtain Cu3Mo2O9/BiVO4A nano-heterostructure composite material. The preparation method provided by the invention is simple to operate, uses water as a solvent, is green and environment-friendly, and is suitable for industrial production.
Cu provided by the invention3Mo2O9/BiVO4Nano heterostructure composite, decahedral BiVO4And Cu3Mo2O9The composition forms a heterostructure, promotes the separation of photoproduction electrons and holes, reduces the probability of the composition of the photoproduction electrons and the holes, and improves the photocatalytic performance of the composite material; cu3Mo2O9Has a band gap energy less than BiVO4Mixing Cu3Mo2O9Loaded in BiVO4The surface can widen the photoresponse range; when the composite material is subjected to Cu or more3Mo2O9/BiVO4When the semiconductor is irradiated by light with band gap energy, electrons in the valence band of the semiconductor can be excited to jump to the conduction band to generate photoproduction electrons and correspondingly leave photoproduction holes in the valence band, the photoproduction electrons and the holes have reducibility and oxidizability, organic pollutants can be directly or indirectly degraded, and Cu3Mo2O9/BiVO4The specific surface area of the nano heterostructure composite material is large, and the adsorption performance of the nano heterostructure composite material on organic pollutants is improved. Compared with pure-phase BiVO (BiVO)4The visible light photocatalytic material has stronger visible light response, lower photon-generated carrier recombination rate, better visible light catalytic degradation performance and good cycle performance, and has good application prospect. As shown by the results of the examples of the present invention, the present invention provides Cu3Mo2O9/BiVO4The visible light response range of the nano heterostructure composite material is 420-538 nm, and the degradation rate of the nano heterostructure composite material on rhodamine B is up to 83, 6 percent, the degradation rate of rhodamine B is still as high as 80.2 percent after being recycled for 4 times, and the degradation rate is only reduced by 3.4 percent.
Drawings
FIG. 1 is BiVO prepared in comparative example 14SEM picture of (1);
FIG. 2 is Cu prepared in comparative example 23Mo2O9SEM picture of (1);
FIG. 3 is 5 wt% Cu prepared in example 23Mo2O9/BiVO4SEM picture of (1);
FIG. 4 is 5 wt% Cu prepared in example 23Mo2O9/BiVO4UV-Vis DRS spectrogram of (1);
FIG. 5 is 5 wt% Cu prepared in example 23Mo2O9/BiVO4Band gap energy spectrum of (a);
FIG. 6 is BiVO prepared in comparative example 14Cu prepared in examples 1 to 43Mo2O9/BiVO4Nano-heterostructure composite and Cu prepared in comparative example 23Mo2O9A degradation effect diagram for rhodamine B;
FIG. 7 is 5 wt% Cu prepared in example 23Mo2O9/BiVO4And (3) a cyclic degradation effect diagram of rhodamine B.
Detailed Description
The invention provides a Cu3Mo2O9/BiVO4Nano-heterostructure composite material comprising BiVO having a decahedral structure4And is loaded on the BiVO4Cu of surface3Mo2O9And (3) nanoparticles.
In the present invention, the Cu3Mo2O9The particle size of the nano particles is preferably 50-180 nm, and more preferably 80-150 nm; the Cu3Mo2O9The loading amount of the nanoparticles is preferably 2-12 wt%, and more preferably 3-8 wt%.
In the invention, the BiVO4The particle size of (B) is preferably 1.5 to 2 μm, more preferably 1.6 to 1.8 μm. In the present inventionBiVO4Has decahedral structure, large specific surface area, and can improve Cu3Mo2O9The bonding strength of the nanoparticles.
In the present invention, the Cu3Mo2O9The nano particles are loaded on BiVO through adsorption4A surface.
The invention also provides the Cu of the technical scheme3Mo2O9/BiVO4The preparation method of the nano heterostructure composite material comprises the following steps:
BiVO (bismuth oxide) is added4And Cu (CH)3COO)2Dispersing in water to obtain mixed dispersion liquid;
mixing Na2MoO4Adding the aqueous solution into the mixed dispersion, coprecipitating and filtering to obtain a precursor;
calcining the precursor to obtain Cu3Mo2O9/BiVO4A nano-heterostructure composite material.
In the present invention, all the raw material components are commercially available products well known to those skilled in the art unless otherwise specified.
In the invention, the BiVO4Preferred is the reference ((Li J Q, Zhou J, Hao H J, et al silver-modified specific (040) facet of BiVO)4 with enhanced photoelectrochemical performance[J]Materials Letters 170(2016) 163-166) preparation, specifically, comprising the following steps: dissolving 5mmol of bismuth nitrate pentahydrate in 20mL of 2mol/L nitric acid solution, and stirring for 30min to obtain solution A; dissolving 5mmol ammonium metavanadate in 20mL sodium hydroxide solution with the concentration of 2mol/L, stirring for 30min, and recording as a solution B; dropwise adding the solution B into the solution A under stirring, and continuously stirring for 2 hours at room temperature; then dropwise adding 2mL of glacial acetic acid and continuously stirring for 1 h; transferring the obtained precursor solution into a 100mL stainless steel high-pressure reaction kettle with a polytetrafluoroethylene lining, reacting for 24h at 180 ℃, then naturally cooling the reaction kettle to room temperature, performing centrifugal separation, sequentially washing the obtained solid product with deionized water and absolute ethyl alcohol for 3 times, and drying the product in a drying oven at 80 ℃ for 10h to obtain BiVO4。
BiVO is synthesized by the invention4And Cu (CH)3COO)2Dispersing in water to obtain mixed dispersion.
In the invention, the BiVO4、Cu(CH3COO)2、Na2MoO4Is preferably 1: (0.021-0.12): (0.023 to 0.14), more preferably 1: (0.032-0.084): (0.034-0.092), and most preferably 1:0.052: 0.057.
In the present invention, the mixing is preferably ultrasonic mixing, and the power of the ultrasonic mixing is not particularly limited in the present invention, and the raw materials may be uniformly mixed. In the present invention, the order of mixing is preferably such that BiVO is mixed4、Cu(CH3COO)2Mixing with part of water for the first ultrasonic treatment to obtain BiVO4/Cu(CH3COO)2Mixing the dispersion liquid; mixing Na2MoO4Mixing with residual water by second ultrasonic wave to obtain Na2MoO4A solution; mixing the Na2MoO4The solution is dripped into BiVO4/Cu(CH3COO)2And thirdly, ultrasonically mixing the mixed dispersion liquid. The invention has no special limit on the dosage of the partial water and can convert BiVO4And Cu (CH)3COO)2Can be uniformly dispersed in water, in the embodiment of the invention, the BiVO4/Cu(CH3COO)2BiVO in dispersion4The concentration of (b) is preferably 0.006-0.010 g/mL, more preferably 0.008g/mL, Cu (CH)3COO)2The concentration of (B) is preferably 0.0009 to 0.0054mmol/mL, more preferably 0.0023 mmol/mL. The amount of the residual water is not particularly limited, and Na can be added2MoO4Dissolved in water, and in the examples of the present invention, the Na is2MoO4The concentration of (B) is preferably 0.0009 to 0.0054mmol/mL, more preferably 0.0023 mmol/mL. In the present invention, the temperature of the first ultrasonic mixing, the second ultrasonic mixing and the third ultrasonic mixing is preferably room temperature; the ultrasonic mixing time is independently preferably 7-15 min, and more preferably 10 min. The dropping speed is not particularly limited in the invention, and the dropping can be carried out dropwise.
After the mixed dispersion liquid is obtained, Na is mixed by the invention2MoO4And adding the aqueous solution into the mixed dispersion, coprecipitating and filtering to obtain a precursor.
In the invention, the temperature of the coprecipitation is preferably 10-40 ℃, and in the embodiment of the invention, the precipitation is preferably carried out at room temperature; the precipitation time is preferably 30-40 min, more preferably 32-38 min, and most preferably 35 min. In the present invention, during the precipitation process, copper ions and molybdate radicals are precipitated to form copper molybdate precipitates.
After the precipitation, the invention preferably further comprises the steps of carrying out solid-liquid separation on the precipitation system, and sequentially carrying out water washing, alcohol washing and drying on the obtained solid product to obtain the precursor. The solid-liquid separation method is not particularly limited, and a solid-liquid separation method known to those skilled in the art, such as filtration, may be employed. In the present invention, the number of times of the water washing is preferably one, and the number of times of the alcohol washing is preferably one; the alcohol wash is preferably an ethanol wash. The amount of water used for washing with water and the amount of alcohol used for washing with alcohol are not particularly limited, and unreacted raw materials and impurities on the surface of the solid product can be removed completely. In the invention, the drying is preferably drying, and the drying temperature is preferably 60-90 ℃, more preferably 70-80 ℃; the drying time is preferably 8-16 h, and more preferably 10-12 h.
After obtaining the precursor, the invention calcines the precursor to obtain Cu3Mo2O9/BiVO4A nano-heterostructure composite material.
In the invention, the calcination temperature is preferably 400-500 ℃, more preferably 420-480 ℃, and most preferably 450 ℃; the heating rate of the precursor from room temperature to the calcining temperature is preferably 5-15 ℃/min, and more preferably 8-10 ℃/min; the calcination time is preferably 1.5 to 3 hours, more preferably 2 to 2.5 hours, and most preferably 2 hours, when the temperature is increased to the calcination temperature. In the present invention, during the calcination, the copper molybdate precipitate in the precursor is decomposed to form Cu3Mo2O9Nanoparticles of Cu3Mo2O9Nanoparticles and BiVO4Formation of Cu3Mo2O9/BiVO4A nano-heterostructure composite material.
The invention also provides Cu in the technical scheme3Mo2O9/BiVO4Nano heterostructure composite material or Cu prepared by preparation method in technical scheme3Mo2O9/BiVO4The application of the nano heterostructure composite material in photocatalytic degradation of organic pollutants.
The invention is not particularly limited to the kind and source of the organic pollutant, such as drugs and dyes, in the embodiment of the invention, preferably rhodamine B is used as the organic pollutant to verify Cu3Mo2O9/BiVO4Degradation performance of the nano heterostructure composite material to organic contaminants.
In the invention, the method for applying comprises the following steps: mixing Cu3Mo2O9/BiVO4The nano heterostructure composite material is mixed with a solution containing organic pollutants, dark treatment is carried out, and then photocatalytic reaction is carried out under the irradiation of visible light.
The concentration of the solution containing organic contaminants in the present invention is not particularly limited, and is specifically 10 mg/L. The invention is directed to the Cu3Mo2O9/BiVO4The mass ratio of the nano heterostructure composite material to the organic pollutant is not particularly limited, and is preferably adjusted according to actual conditions; in the examples of the present invention, the Cu3Mo2O9/BiVO4The mass ratio of the nano-heterostructure composite to the organic contaminant is preferably 1: 40. in the invention, the time of the dark treatment is preferably 20-40 min, and more preferably 30 min. In the present invention, the visible light is preferably provided by a 350W xenon lamp equipped with a 420nm filter. In the present invention, the temperature of the photodegradation is preferably room temperature.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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.
Example 1
Dissolving 5mmol of bismuth nitrate pentahydrate in 20mL of 2mol/L nitric acid solution, and stirring for 30min to obtain solution A; dissolving 5mmol ammonium metavanadate in 20mL sodium hydroxide solution with the concentration of 2mol/L, stirring for 30min, and recording as a solution B; dropwise adding the solution B into the solution A under stirring, and continuously stirring for 2 hours at room temperature; then dropwise adding 2mL of glacial acetic acid and continuously stirring for 1 h; transferring the obtained precursor solution into a 100mL stainless steel high-pressure reaction kettle with a polytetrafluoroethylene lining, reacting for 24h at 180 ℃, then naturally cooling the reaction kettle to room temperature, performing centrifugal separation, sequentially washing the obtained solid product with deionized water and absolute ethyl alcohol for 3 times, and drying the product in a drying oven at 80 ℃ for 10h to obtain BiVO4。
0.4g of BiVO4、0.021g Cu(CH3COO)2Ultrasonically mixing the mixture with 50mL of deionized water for 10min to obtain BiVO4/Cu(CH3COO)2Mixing the dispersion liquid; mixing 0.023g of Na2MoO4Ultrasonically mixing with 50mL of deionized water for 10min to obtain Na2MoO4A solution; mixing the Na2MoO4The solution was added dropwise to BiVO4/Cu(CH3COO)2Performing ultrasonic treatment on the mixed dispersion liquid for 10min, precipitating for 35min, filtering, washing the obtained solid product, and drying at 80 ℃ for 10h to obtain a precursor; heating to 450 ℃ at the speed of 8 ℃/min, calcining the precursor for 2h to obtain Cu3Mo2O9/BiVO4Nano-heterostructure composite (abbreviated as 5 wt% Cu)3Mo2O9/BiVO4Wherein 5 wt% represents Cu3Mo2O9The loading was 5 wt%).
Examples 2 to 4
According to example 1Method for preparing Cu3Mo2O9/BiVO4The preparation conditions of the nano heterostructure composite materials of the embodiments 2 to 4 different from the embodiment 1 are shown in the following table 1:
TABLE 1 preparation conditions of examples 1 to 4
BiVO4
Cu(CH3COO)2
Na2MoO4
Product of
Example 1
0.4g
0.011g
0.012g
2.5wt％Cu3Mo2O9/BiVO4
Example 2
0.4g
0.021g
0.0230g
5wt％Cu3Mo2O9/BiVO4
Example 3
0.4g
0.032g
0.132g
7.5wt％Cu3Mo2O9/BiVO4
Example 4
0.4g
0.042g
0.166g
10wt％Cu3Mo2O9/BiVO4
Comparative example 1
BiVO prepared as in example 14As comparative example 1.
Comparative example 2
2.1mg of copper acetate was dissolved in 40mL of deionized water and dissolved by sonication. 2.3mg of sodium molybdate was dissolved in 40mL of deionized water and dissolved by sonication. Then adding the copper acetate solution into the sodium molybdate solution under the stirring condition for precipitation for 30min, filtering, washing the obtained solid product with water, drying for 10h at the temperature of 80 ℃, and then calcining for 2h at the temperature of 450 ℃ to obtain Cu3Mo2O9。
BiVO prepared in comparative example 14SEM image of (5) shown in FIG. 1, Cu prepared in comparative example 23Mo2O9SEM image of (5 wt%) Cu prepared in example 2 is shown in FIG. 23Mo2O9/BiVO4Is shown in fig. 3. As can be seen from FIGS. 1 to 3, pure phase BiVO4Has a particle size of 1.5-2 μm, has a decahedral structure, and is pure phase Cu3Mo2O9The Cu prepared by the preparation method provided by the invention is granular3Mo2O9/BiVO4In BiVO4Successfully load Cu on the surface3Mo2O9Nanoparticles having a heterostructure.
5 wt% Cu prepared in example 23Mo2O9/BiVO4Comparative example 1 preparationBiVO (b)4And Cu prepared in comparative example 23Mo2O9The UV-Vis DRS spectrum is shown in FIG. 4, and the band gap energy spectrum is shown in FIG. 5. As can be seen from FIGS. 4 to 5, 5 wt% Cu3Mo2O9/BiVO4The visible light response range of the light-emitting diode is 420-538 nm, and the light-emitting diode and the BiVO are4In contrast, 5 wt% Cu3Mo2O9/BiVO4The band gap energy of (2) is reduced.
Application example 1
Preparing rhodamine B water solution (C) by taking rhodamine B as a target degradation product010mg/L, 40mL) without photocatalyst (blank) and 10mg each of Cu prepared in examples 1 to 4 was added3Mo2O9/BiVO4Nano heterostructure composite material, BiVO prepared in comparative example 14And Cu prepared in comparative example 23Mo2O9As photocatalyst, after dark treatment for 30min, photocatalytic reaction was performed under irradiation of visible light source (350W xenon lamp equipped with 420nm filter), and the concentration of rhodamine B (C) was sampled every 20mint) And calculating the degradation rate of the rhodamine B (1-C)t/C0) 100%, the test results are shown in table 2 and figure 6.
TABLE 2 degradation ratio of photocatalyst to rhodamine B (%)
Photocatalyst and process for producing the same
20min
40min
60min
80min
100min
120min
2.5wt％Cu3Mo2O9/BiVO4
24.5
38.8
49.4
59.5
67.5
74.7
5wt％Cu3Mo2O9/BiVO4
32.9
47.7
58.6
73.7
80.9
83.6
7.5wt％Cu3Mo2O9/BiVO4
30.5
46.0
57.5
68.2
74.7
79.9
10wt％Cu3Mo2O9/BiVO4
26.1
41.0
52.5
61.4
70.2
76.6
BiVO4
5.8
10.1
13.8
17.8
20.7
23.9
Cu3Mo2O9
0.7
1.4
1.7
1.9
2.4
3.1
Blank space
0
0
0
0
0
0
As can be seen from FIG. 6 and Table 2, BiVO was observed after 120min of degradation4The degradation rate of rhodamine B is 23.9 percent, and Cu3Mo2O9The degradation rate of rhodamine B is 3.1 percent, and the Cu prepared by the method3Mo2O9/BiVO4The degradation rate of the nano heterostructure composite material to rhodamine B is 74.7-83.6%, which indicates that the material is relatively BiVO4And Cu3Mo2O9In particular, the Cu prepared by the invention3Mo2O9/BiVO4Nano heterostructure composite material diagonalThe degradation rate of the danming B is obviously improved.
Application example 2
5 wt% Cu prepared in example 23Mo2O9/BiVO4Degrading rhodamine B according to the method of application example 1, and after the degradation is finished, adding 5 wt% of Cu3Mo2O9/BiVO4Carrying out centrifugal separation, washing, drying and collecting the obtained solid catalyst material in sequence to obtain a recovered photocatalyst, and carrying out next photocatalytic degradation experiment according to the method of application example 1; totally recycled for 4 times, 5 wt% Cu3Mo2O9/BiVO4The cycle performance of (c) is shown in fig. 7. As can be seen from FIG. 7, 5 wt% Cu3Mo2O9/BiVO4The degradation rates of 1-4 times of cyclic use of rhodamine B are 83.6%, 81.1%, 79.8% and 79.2% in sequence, and the indication shows that the Cu provided by the invention3Mo2O9/BiVO4The nano heterostructure composite material has good recycling performance.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.