CN114291864A - Based on MoS2/BiVO4Method for degrading pollutants by using photo-Fenton system with photocatalyst activated peroxymonosulfate - Google Patents
Based on MoS2/BiVO4Method for degrading pollutants by using photo-Fenton system with photocatalyst activated peroxymonosulfate Download PDFInfo
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Abstract
The invention relates to a method based on MoS2/BiVO4Method for degrading pollutants by using photocatalyst to activate photo-Fenton system of peroxymonosulfate, wherein MoS is used as basis for method2/BiVO4The photocatalyst activates the photo-Fenton system of the peroxymonosulfate, and can generate a large amount of active oxidizing Substances (SO) under the irradiation of visible light4 ·‑、·OH、1O2And h+) Greatly improving the efficiency of degrading the bisphenol waste water. Meanwhile, the method has stronger interference resistance, can adapt to complex water body environment, is more suitable for the degradation of high-concentration pollutants in actual wastewater, and can resist waterInorganic anions and natural organic substances in the body. Under the conditions that the concentration of anions in the wastewater is 10mM and the concentration of organic matters (humic acid) is 5-20mg/L, the wastewater still has high-efficiency degradation rate on pollutants, has excellent performance on resisting inorganic anions and organic matters in the actual wastewater, and has wide applicability.
Description
Technical Field
The invention relates to a method based on MoS2/BiVO4Photocatalyst activityA method for degrading pollutants by a photo-Fenton system of peroxide monosulfate belongs to the technical field of advanced oxidation treatment.
Background art:
with the rapid development of modern industry, the output and discharge amount of industrial wastewater are increased sharply, which poses serious threat to the protection of water ecological environment. Advanced Oxidation Processes (AOPs) are considered to be an effective technique for completely degrading organic compounds in aqueous media. Fenton oxidation is a commonly used advanced oxidation process, and in the Fenton system, organic pollutants can be oxidized by hydroxyl radicals (HO) and sulfate radicals (SO)4 −) Isoactive species oxidize and ultimately mineralize to CO2And H2And O. Peroxymonosulfate (PMS) is an asymmetric oxidant with high reactivity, and can be activated by heating, ultrasonic waves, light radiation, transition metals and other methods to generate sulfate radicals to degrade pollutants, but the methods have high energy consumption and easily cause the problems of metal leaching, secondary pollution and the like; under visible light, a photo-Fenton system is constructed by activating Peroxymonosulfate (PMS) assisted by a photocatalyst, higher pollutant degradation rate and mineralization rate can be realized under relatively mild conditions, and the problems of high energy consumption, metal leaching, secondary pollution and the like are solved; PMS is used as an electron acceptor, and can improve photo-generated electrons (e)-) And a cavity (h)+) The separation and transfer of the sulfate radical, the yield of sulfate radical is improved, and the synergistic effect of pollutant degradation is realized, but the active substances generated by a photo-Fenton system constructed by activating the existing photocatalyst-assisted Peroxymonosulfate (PMS) are few, the degradation efficiency is low, and meanwhile, the anti-interference capability is low.
Current MoS2/BiVO4The photocatalyst is mainly applied to a pure photocatalytic system to degrade pollutants. For example, Chinese patent document CN110560092A discloses a MoS2/BiVO4A preparation method and application of a heterojunction composite photocatalyst. The 2DMoS2/0DBiVO4The composite photocatalyst is MoS2Adding the nano-sheets, bismuth nitrate and polyvinylpyrrolidone into ethylene glycol, adding an ammonium metavanadate solution after ultrasonic dispersion, and finally carrying out mixing on the mixed solutionHydrothermal reaction; the degradation rate of the tetracycline is only 68.83%, the photocatalytic efficiency is low, and the method cannot adapt to complex wastewater environment.
Therefore, a novel PMS activation system assisted by a photocatalyst is needed to be developed so as to realize the efficient removal of organic pollutants in a complex water body.
The invention content is as follows:
aiming at the defects of the prior art, the invention is based on MoS2/BiVO4A method for degrading pollutants by a photo-Fenton system of activating peroxymonosulfate by a photocatalyst.
The invention relates to MoS with a nanometer flower structure2/BiVO4The composite photocatalyst is used as a PMS activator to construct a photo-Fenton system, and PMS is activated under the irradiation of visible light to generate active substances such as sulfate radicals, hydroxyl radicals and the like, so that the high-efficiency degradation of bisphenol organic pollutants is realized.
The constructed photo-Fenton system greatly improves the treatment efficiency of wastewater, the pollutant degradation rate of the system can reach 99.0% within 20min under the conditions that the initial pH =5.0, the dosage of PMS is 0.2g/L and the dosage of the composite photocatalyst is 0.1g/L, and the system can adapt to complex water environment, has strong anti-interference capability and has wide applicability to the actual wastewater treatment.
In order to realize the purpose, the invention is realized by the following technical scheme:
based on MoS2/BiVO4A method for degrading pollutants by a photo-Fenton system of activating peroxymonosulfate with a photocatalyst comprises the following steps:
adding MoS with nanoflower structure into wastewater containing pollutants2/BiVO4Adding Peroxymonosulfate (PMS) into the composite material, stirring and reacting under the conditions of room temperature, pH of 3.0-9.0 and visible light irradiation, and quickly generating a large amount of active oxidation substances by a system to realize the photo-Fenton oxidative degradation of pollutants.
Preferred according to the invention, MoS2/BiVO4The adding amount of the composite material is as follows: MoS per liter of wastewater2/BiVO4The adding amount of the composite material is 0.2-0.3 g;
further preferably, MoS2/BiVO4The adding amount of the composite material is as follows: MoS per liter of wastewater2/BiVO4The amount of the composite material added was 0.2 g.
According to the invention, the peroxymonosulfate is preferably added in an amount of: the adding amount of the peroxymonosulfate in each liter of wastewater is 0.1-0.14 g;
further preferably, the addition amount of the peroxymonosulfate is: the amount of peroxymonosulfate added per liter of wastewater was 0.1 g.
Preferably, according to the invention, the contaminants are bisphenol contaminants.
Further preferably, the contaminant is bisphenol a (bpa) or bisphenol f (bpf).
Preferably, according to the invention, the concentration of the contaminants in the waste water is between 10 and 40 mg/L.
According to the present invention, the pH of the waste water is preferably 3 to 9, more preferably 3 to 6, and most preferably 3.
According to the invention, the wavelength of the visible light is preferably 420-760nm, and the light source of the visible light is a xenon lamp.
According to the invention, the MoS is preferable2/BiVO4The composite material comprises a three-dimensional nanometer flower structure MoS2And nanoparticles BiVO4Three-dimensional nanoflower structure MoS2The surface is uniformly loaded with nanometer BiVO4And (3) granules.
Preferred according to the invention, MoS2/BiVO4The composite material is prepared by the following steps:
(1) preparation of MoS2Nano flower:
mixing ammonium molybdate tetrahydrate, thiourea and deionized water, stirring until the mixture is uniformly mixed to obtain a mixed solution a, placing the mixed solution a into a high-pressure kettle for hydrothermal reaction, cooling to room temperature after the reaction, alternately washing the obtained product with ethanol and deionized water, and drying in vacuum; obtaining MoS2A nanoflower;
(2) preparation of MoS2/BiVO4The composite photocatalyst comprises:
the five ingredients are hydratedBismuth nitrate and MoS prepared in step (1)2Adding the nanoflower into ethylene glycol, fully stirring to obtain a mixed solution b, and slowly adding a hot ammonium metavanadate solution into the mixed solution b under vigorous stirring to obtain a precursor solution; placing the precursor solution into a high-pressure kettle for hydrothermal reaction, cooling to room temperature after the reaction, alternately washing the obtained product with ethanol and deionized water, and drying in vacuum to obtain MoS2/BiVO4A composite photocatalyst is provided.
Preferably, in step (1), the molar ratio of ammonium molybdate tetrahydrate to thiourea is: 1: (20-30), the molar volume ratio of ammonium molybdate tetrahydrate to deionized water is as follows: 1 (60-80), unit: mmol/mL.
Preferably, in step (1), the hydrothermal reaction temperature is 180-220 ℃, and the reaction time is 10-16 h.
According to the invention, in the step (1), the vacuum drying time is 8-12h, and the drying temperature is 40-80 ℃.
Preferably according to the invention, in step (2), the molar volume ratio of bismuth nitrate pentahydrate to ethylene glycol is (0.3-0.8): (30-60), unit: mmol/mL.
Preferably, according to the invention, in step (2), MoS2The mass volume ratio of the nanoflower to the glycol is (0.1-0.4): (30-60), unit: g/mL.
According to the present invention, in step (2), 0.5mmol of ammonium metavanadate is dissolved in 40mL of deionized water at 60-80 ℃.
According to the present invention, in step (2), the molar ratio of ammonium metavanadate to bismuth nitrate pentahydrate in the ammonium metavanadate solution is: 0.5: (0.3-0.8), and the temperature of the hot ammonium metavanadate solution is 60-80 ℃.
Preferably, in step (2), the hydrothermal reaction temperature is 140-180 ℃ and the reaction time is 10-14 h.
According to the invention, in the step (2), the vacuum drying time is 10-14h, and the drying temperature is 40-80 ℃.
The method for degrading pollutants is based on MoS2/BiVO4The photocatalyst activates the photo-Fenton system of peroxymonosulfate, and the system generates active substances participating in pollutant degradation through three ways; first, due to the matched band structure, MoS2/BiVO4The composite photocatalyst is excited under the irradiation of visible light to generate photo-generated electrons (e)-) Photo-generated holes (h)+) And hydroxyl radicals (OH), which can directly participate in the degradation of pollutants; secondly, the Peroxymonosulfate (PMS) added into the system can further react with the photoproduction electrons and the holes to generate sulfate radical (SO)4 −) And singlet oxygen: (1O2) To participate in the degradation of the contaminants; thirdly, MoS2/BiVO4Mo (IV) in the composite material can be oxidized into Mo (VI) through electron transfer, and PMS is activated to generate sulfate radicals and hydroxyl radicals. Through the above way, not only separation and transfer of photoproduction electrons and holes are promoted, but also yield of sulfate radicals is greatly improved, and a synergistic effect of pollutant degradation is realized.
The invention has the technical characteristics and advantages that:
1. the method for degrading pollutants is based on MoS2/BiVO4The photocatalyst activates the photo-Fenton system of the peroxymonosulfate, and can generate a large amount of active oxidizing Substances (SO) under the irradiation of visible light4 −、OH、1O2And h+) Greatly improving the efficiency of degrading the bisphenol waste water.
2. The method for degrading pollutants can realize higher pollutant degradation rate and mineralization rate under relatively mild conditions, and overcomes the problems of high energy consumption, metal leaching, secondary pollution and the like.
3. The method for degrading pollutants has stronger anti-interference performance, can adapt to complex water body environment, is more suitable for degrading high-concentration pollutants in actual wastewater, can resist the influence of inorganic anions and natural organic matters in water body, and can remove anions (Cl) in wastewater-、SO4 2-And NO3 -) Under the conditions that the concentration is 10mM and the concentration of organic matters (humic acid) is 5-20mg/L, the composite material still has high-efficiency degradation rate on pollutants, has excellent performance on resisting inorganic anions and organic matters in actual wastewater, and has wide applicability.
4. MoS of the invention2/BiVO4The synthetic method of the composite photocatalyst is simple, convenient, environment-friendly and efficient. The material is easy to recover, has good stability and can be recycled. In addition, the composite material shows excellent photocatalytic performance and PMS activation performance, and realizes high-efficiency utilization of visible light.
Drawings
FIG. 1 is a pure MoS2Pure BiVO4And MoS2/BiVO4SEM spectrogram of the composite photocatalyst;
FIG. 2 is a pure MoS2Pure BiVO4And MoS2/BiVO4An XRD spectrogram of the composite photocatalyst;
FIG. 3 is a medium pure MoS2Pure BiVO4And MoS2/BiVO4XPS spectrum of composite photocatalyst, a is pure MoS2Pure BiVO4And MoS2/BiVO4XPS full spectrum of the composite photocatalyst (2-MB), b is MoS2/BiVO4V2p spectrogram of the composite photocatalyst (2-MB), wherein c is MoS2/BiVO4The spectra of Bi4f and S2p of the composite photocatalyst (2-MB), and d is MoS2/BiVO4Mo3d and S2S spectrograms of the composite photocatalyst (2-MB);
FIG. 4 shows pure MoS of example 12Pure BiVO4And different MoS2Addition amount of MoS2/BiVO4A comparison graph of the catalytic degradation effect of the composite photocatalyst on the bisphenol A;
FIG. 5 is a graph of the catalytic degradation effect of the catalyst concentration, PMS concentration and pH on bisphenol A in example 1, a is a graph of the catalytic degradation effect of the catalyst concentration on bisphenol A, b is a graph of the catalytic degradation effect of PMS concentration on bisphenol A, and c is a graph of the catalytic degradation effect of different pH on bisphenol A;
FIG. 6 is a graph showing the effect of different anions on the catalytic degradation of bisphenol A in example 1;
FIG. 7 is a graph showing the effect of humic acid concentration on bisphenol A catalytic degradation in example 1;
FIG. 8 is a graph showing the effect of different trapping agents on the catalytic degradation of bisphenol A in example 1, wherein a is a graph showing the effect of different concentrations of p-Benzoquinone (BQ) and Ammonium Oxalate (AO) on the catalytic degradation of bisphenol A, and b is a graph showing the effect of different concentrations of methanol (MeOH) and tert-butyl alcohol (TBA) on the catalytic degradation of bisphenol A;
FIG. 9 is an EPR spectrum of different actives in example 1; a is an EPR spectrum of singlet oxygen, and b is an EPR spectrum of hydroxyl radical and sulfate radical.
Detailed Description
The present invention will be further described with reference to the following detailed description of embodiments thereof, but not limited thereto, in conjunction with the accompanying drawings.
The starting materials used in the examples are all conventional commercial products.
Examples MoS2/BiVO4The composite material is prepared by the following method:
(1) preparation of MoS2Nano flower:
mixing 1mmol of ammonium molybdate tetrahydrate and 28mmol of thiourea with 70mL of deionized water, stirring until the mixture is uniformly mixed, placing the mixed solution into an autoclave, carrying out hydrothermal reaction for 12h at 200 ℃, and cooling to room temperature after the reaction. Washing the obtained product with ethanol and deionized water alternately, and vacuum drying at 60 ℃ for 10h to obtain MoS2And (4) nano flowers.
(2) Preparation of MoS2/BiVO4The composite photocatalyst comprises:
0.5mmol of bismuth nitrate pentahydrate is added into 40mL of ethylene glycol to be stirred and dissolved, and then 0.1g, 0.2g, 0.3g and 0.4g of MoS prepared in the step (1) are respectively added2The nanoflower is fully stirred to obtain a mixed solution a; 0.5mmol of ammonium metavanadate is added into 40mL of hot deionized water, and the mixture is fully stirred to obtain a mixed solution b. Then, the mixture b was slowly added to the mixture a under vigorous stirring to obtain a precursor solution. And (3) placing the precursor solution into an autoclave, carrying out hydrothermal reaction for 12h at 160 ℃, and cooling to room temperature after the reaction. Washing the obtained product with ethanol and deionized water alternately, and vacuum drying at 60 ℃ for 12h to obtain MoS2/BiVO4A composite photocatalyst is provided. 0.1g, 0.2g, 0.3g and0.4gMoS2prepared MoS2/BiVO4The composite photocatalysts are named as 1-MB, 2-MB, 3-MB and 4-MB respectively.
In the embodiment, the wastewater containing the pollutants is simulated pollutant wastewater, and bisphenol A (BPA) is added into the water to ensure that the concentration of the bisphenol A (BPA) is 30mg/L, so that the wastewater containing the pollutants is obtained.
Example 1
Based on MoS2/BiVO4A method for degrading pollutants by a photo-Fenton system of activating peroxymonosulfate with a photocatalyst comprises the following steps:
adding MoS with nanoflower structure into wastewater containing pollutants2/BiVO4Adding potassium hydrogen Peroxymonosulfate (PMS) into the composite material (2-MB), stirring and reacting under the conditions of room temperature, pH of 3.0-9.0 and visible light irradiation, and quickly generating a large amount of active oxidation substances by a system to realize the photo-Fenton oxidation degradation of pollutants; MoS2/BiVO4The adding amount of the composite material is as follows: MoS per liter of wastewater2/BiVO4The amount of the composite material added was 0.2 g. The adding amount of potassium peroxymonosulfate is as follows: in each liter of wastewater, the addition amount of potassium monopersulfate was 0.1g, and the initial pH of the wastewater was 3. The wavelength of the visible light is 420-760nm, and the light source of the visible light is a xenon lamp;
at different reaction time intervals, 1ml of the reaction solution was passed through a 0.22 μm Teflon filter and the concentration of bisphenol A was measured at 276nm by liquid chromatography.
Example 2
MoS-based as described in example 12/BiVO4The method for degrading pollutants by using a photo-Fenton system with a photocatalyst for activating peroxymonosulfate is characterized by comprising the following steps of:
MoS2/BiVO4the adding amount of the composite material is as follows: MoS per liter of wastewater2/BiVO4The amount of the composite material added was 0.25 g.
Example 3
MoS-based as described in example 12/BiVO4The method for degrading pollutants by using a photo-Fenton system with a photocatalyst for activating peroxymonosulfate is characterized by comprising the following steps of:
MoS2/BiVO4the adding amount of the composite material is as follows: MoS per liter of wastewater2/BiVO4The amount of the composite material added was 0.3 g.
Example 4
MoS-based as described in example 12/BiVO4The method for degrading pollutants by using a photo-Fenton system with a photocatalyst for activating peroxymonosulfate is characterized by comprising the following steps of:
the adding amount of potassium peroxymonosulfate is as follows: the amount of potassium monopersulfate added per liter of wastewater was 0.12 g.
Example 5
MoS-based as described in example 12/BiVO4The method for degrading pollutants by using a photo-Fenton system with a photocatalyst for activating peroxymonosulfate is characterized by comprising the following steps of:
the adding amount of potassium peroxymonosulfate is as follows: the amount of potassium monopersulfate added per liter of wastewater was 0.14 g.
Example 6
MoS-based as described in example 12/BiVO4The method for degrading pollutants by using a photo-Fenton system with a photocatalyst for activating peroxymonosulfate is characterized by comprising the following steps of:
the initial pH of the wastewater was 5.
Example 7
MoS-based as described in example 12/BiVO4The method for degrading pollutants by using a photo-Fenton system with a photocatalyst for activating peroxymonosulfate is characterized by comprising the following steps of:
the initial pH of the wastewater was 7.
Comparative example 1
The method for degrading pollutants as described in example 1, except that:
with pure MoS2Instead of MoS2/BiVO4Composite material (2-MB).
Comparative example 2
The method for degrading pollutants as described in example 1, except that:
with pure BiVO4Instead of MoS2/BiVO4Composite material (2-MB).
Application example 1:
in the examples and comparative examples, pure MoS2Pure BiVO4And different MoS2Addition amount of MoS2/BiVO4The catalytic degradation effect of the composite photocatalyst on bisphenol A is shown in figure 4. As can be seen from FIG. 4, pure MoS2And pure BiVO4Neither was able to effectively degrade bisphenol A, and 2gMoS was added2The degradation rate of the prepared 2-MB composite photocatalyst to the bisphenol A can reach 100 percent within 25 min.
Application example 2:
the effect of different catalyst concentrations, PMS concentrations and pH on the catalytic degradation of bisphenol A is shown in FIG. 5. With the increase of the catalyst concentration and PMS concentration, the degradation rate of bisphenol A is increased continuously, and bisphenol A is effectively degraded in the range of pH3-9, which shows that the catalytic system can be suitable for a wider pH range.
Application example 3:
to the system of example 1 was added separately anionic Cl-、SO4 2-、NO3 -Reacting Cl-At a concentration of 10mM, SO4 2-The concentration is 10mM, NO3 -The concentration is 10mM, different systems are obtained, and the catalytic degradation effect of the different systems on bisphenol A is shown in figure 6. In the presence of 10mM of different anions, the inhibition of the whole catalytic degradation system is small, indicating that the catalytic system can resist the inorganic anions in the actual wastewater.
Application example 4:
the effect of the system on catalytic degradation of bisphenol A is shown in FIG. 7, where natural organic humic acid is added to the system of example 1 to make the concentration of the natural organic humic acid 5 to 20 mg/L. In the presence of 5-20mg/L humic acid, the degradation rate of bisphenol A can reach 80% within 25min, which shows that the catalytic system can resist the natural organic humic acid existing in the actual wastewater.
Application example 5:
different capture agents were added to the system of example 1 and the effect on bisphenol a catalytic degradation in the presence of the different capture agents is shown in fig. 8. Methanol (MeOH), tert-butanol (TBA), p-Benzoquinone (BQ) and oxalic acidAmmonium (AO) as SO4 −、·OH、O2 −And h+The quencher of (1). When p-benzoquinone is added, the whole degradation system is basically not inhibited, and when methanol, tert-butyl alcohol and ammonium oxalate are added, the degradation system is greatly inhibited, which shows that SO4 −OH and h+Plays a leading role in the system. The EPR spectra for the different actives are shown in figure 9. Using DMPO and TEMP as SO respectively4 −OH and1O2the capturing agent of (1). Under dark conditions, no signal of any active substance is present in the reaction system. In the light and after addition of PMS, SO appeared4 −OH and1O2the strong signal peak of the bisphenol A further proves that the constructed photo-Fenton system can generate a large amount of active substances and realize efficient degradation of the bisphenol A.
Claims (10)
1. Based on MoS2/BiVO4A method for degrading pollutants by a photo-Fenton system of activating peroxymonosulfate with a photocatalyst comprises the following steps:
adding MoS with nanoflower structure into wastewater containing pollutants2/BiVO4Adding Peroxymonosulfate (PMS) into the composite material, stirring and reacting under the conditions of room temperature, pH of 3.0-9.0 and visible light irradiation, and quickly generating a large amount of active oxidation substances by a system to realize the photo-Fenton oxidative degradation of pollutants.
2. The method of claim 1, wherein MoS is a process for making a composite material2/BiVO4The adding amount of the composite material is as follows: MoS per liter of wastewater2/BiVO4The adding amount of the composite material is 0.2-0.3 g.
3. The method of claim 1, wherein MoS is a process for making a composite material2/BiVO4The adding amount of the composite material is as follows: MoS per liter of wastewater2/BiVO4The amount of the composite material added was 0.2 g.
4. The process according to claim 1, characterized in that the peroxymonosulfate is added in an amount of: the dosage of the peroxymonosulfate in each liter of wastewater is 0.1-0.14 g.
5. The process according to claim 1, characterized in that the peroxymonosulfate is added in an amount of: the amount of peroxymonosulfate added per liter of wastewater was 0.1 g.
6. The method of claim 1, wherein the contaminants are bisphenol contaminants, the bisphenol contaminants are bisphenol a (bpa) or bisphenol f (bpf), and the concentration of the contaminants in the wastewater is 10-40 mg/L.
7. A method according to claim 1, characterized in that the pH of the waste water is 3-9, further preferably the pH of the waste water is 3-6, most preferably the pH of the waste water is 3.
8. The method as claimed in claim 1, wherein the wavelength of visible light is 420-760nm, and the light source of visible light is xenon lamp.
9. The method of claim 1, wherein said MoS is a solid-state imaging device2/BiVO4The composite material comprises a three-dimensional nanometer flower structure MoS2And nanoparticles BiVO4Three-dimensional nanoflower structure MoS2The surface is uniformly loaded with nanometer BiVO4Particles;
MoS2/BiVO4the composite material is prepared by the following steps:
(1) preparation of MoS2Nano flower:
mixing ammonium molybdate tetrahydrate, thiourea and deionized water, stirring until the mixture is uniformly mixed to obtain a mixed solution a, placing the mixed solution a into a high-pressure kettle for hydrothermal reaction, cooling to room temperature after the reaction, alternately washing the obtained product with ethanol and deionized water, and drying in vacuum; obtaining MoS2A nanoflower;
(2) preparation of MoS2/BiVO4The composite photocatalyst comprises:
mixing bismuth nitrate pentahydrate and MoS prepared in step (1)2Adding the nanoflower into ethylene glycol, fully stirring to obtain a mixed solution b, and slowly adding a hot ammonium metavanadate solution into the mixed solution b under vigorous stirring to obtain a precursor solution; placing the precursor solution into a high-pressure kettle for hydrothermal reaction, cooling to room temperature after the reaction, alternately washing the obtained product with ethanol and deionized water, and drying in vacuum to obtain MoS2/BiVO4A composite photocatalyst is provided.
10. The method of claim 9, wherein in step (1), the molar ratio of ammonium molybdate tetrahydrate to thiourea is: 1: (20-30), the molar volume ratio of ammonium molybdate tetrahydrate to deionized water is as follows: 1 (60-80), unit: mmol/mL, in the step (1), the hydrothermal reaction temperature is 180-220 ℃, and the reaction time is 10-16 h;
in the step (2), the molar volume ratio of the bismuth nitrate pentahydrate to the ethylene glycol is (0.3-0.8): (30-60), unit: mmol/mL, step (2), MoS2The mass volume ratio of the nanoflower to the glycol is (0.1-0.4): (30-60), unit: g/mL, in the step (2), 0.5mmol of ammonium metavanadate is dissolved in 40mL of deionized water at the temperature of 60-80 ℃, and in the step (2), the molar ratio of the ammonium metavanadate to the bismuth nitrate pentahydrate in the ammonium metavanadate solution is as follows: 0.5: (0.3-0.8), the temperature of the hot ammonium metavanadate solution is 60-80 ℃, in the step (2), the hydrothermal reaction temperature is 140-180 ℃, and the reaction time is 10-14 h.
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| CN114671487A (en) * | 2022-04-12 | 2022-06-28 | 合肥工业大学 | Method for degrading pollutants in wastewater by activating peroxymonosulfate through light-assisted iron diselenide |
| CN115215421A (en) * | 2022-08-16 | 2022-10-21 | 南华大学 | Application of vanadium tetrasulfide in degradation of organic pollutants |
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