CN113135594B - Activation method of persulfate and application thereof - Google Patents
Activation method of persulfate and application thereof Download PDFInfo
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Abstract
The application belongs to the technical field of inorganic chemistry and water treatment, and particularly relates to an activation method of persulfate and application thereof. The application provides an activation method of persulfate, which comprises the following steps: moS is carried out 2 Mixing nanoflower, persulfate and first solvent, performing ultrasonic treatment for 10-400min, and passing MoS 2 The nanoflower activates persulfate to generate free radicals. The activation method can be applied to environmental pollution treatment and organic pollutant degradation. The activation method provided by the application is a novel persulfate activation method, not only enriches the activation way of persulfate, but also solves the technical defects of high energy consumption existing in the existing physical persulfate activation method and environmental pollution existing in the chemical persulfate activation method.
Description
Technical Field
The application belongs to the technical field of inorganic chemistry and water treatment, and particularly relates to an activation method of persulfate and application thereof.
Background
With the rapid development of industrialization and city, in recent years, the amount of sewage discharged into the environment by human activities is increasing, and the sewage contains a plurality of organic pollutants which are difficult to degrade, so that serious pollution is caused to environmental water bodies. Meanwhile, the ecological environment and human health are also greatly threatened, so that the organic pollutants difficult to degrade in the water are required to be effectively removed.
Advanced oxidation technologies (AOPs) are considered to be an efficient and rapid abatement technology, and are widely used for treating organic wastewater. Among them, the advanced oxidation method based on persulfate has recently attracted much attention. The traditional advanced oxidation technology is mainly based on hydrogen peroxide or ozone, and persulfate is used as a strong oxidant, so that the persulfate is more convenient to store and transport than oxidants such as hydrogen peroxide; and the generated sulfate radical (2.5-3.1V) has higher oxidation-reduction potential than hydroxyl radical (1.8-2.7V), and longer free radical life, persulfate activityThe decomposed sulfate radical has a lone pair of electrons with oxidation-reduction potential E 0 = +2.6V, far higher than persulfate ion (E 0 = +2.01v), close to hydroxyl radical, can theoretically degrade most organic pollutants rapidly, and thus has potential application value in industry. Although persulfates have a high redox potential, they do not react directly with contaminants themselves, and they need to be activated by various methods to generate free radicals. The strong oxidizing property of the free radical is utilized to attack the organic pollutants, so that the degradation efficiency of the organic pollutants can be effectively improved.
Conventional methods of activating persulfates can be largely classified into physical activation and chemical activation. These activation methods generally require the addition of energy or the addition of new chemicals for activation purposes. Wherein the physical activation mainly comprises the following steps: thermal activation, electro-activation, ultraviolet radiation, etc., which are commonly associated with high energy consumption, require a significant input of externally applied energy. And the chemical activation method comprises: transition metal oxide, alkali activation, phenol activation and the like, although the chemical activation efficiency is higher, the transition metal oxide is extremely easy to generate metal ion leakage under an acidic environment to cause secondary pollution, and the strong alkaline condition of the alkali activation causes new environmental burden to a certain extent, and the treatment cost is increased.
In summary, the conventional method for activating persulfate has the technical defects of high energy consumption and secondary pollution to the environment. Therefore, developing a new low energy, efficient, clean, green method for activating persulfate is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the present application provides a persulfate activation method and application thereof, which can effectively solve the technical defects of high energy consumption and environmental pollution existing in the existing persulfate activation method.
The first aspect of the application provides an activation method of persulfate, which comprises the following steps:
MoS is carried out 2 Mixing nanoflower, persulfate and first solventPerforming ultrasonic treatment for 10-400min under MoS condition 2 The nanoflower activates the persulfate to generate free radicals.
The first solvent may be water (distilled water, deionized water, etc.), or may be a solution contaminated with an organic (e.g., groundwater contaminated with an organic, organic wastewater, etc.).
More preferably, the time of the ultrasonic treatment is 90-180min.
Preferably, the power of the ultrasonic wave is 50-500W, the frequency of the ultrasonic wave is 30-100 KHZ, and the temperature of the ultrasonic wave is 10-50 ℃.
More preferably, the power of the ultrasonic wave is 300-500W, the frequency of the ultrasonic wave is 40KHZ, the temperature of the ultrasonic wave is 10-30 ℃, most preferably, the temperature of the ultrasonic wave is 25 ℃, and the ultrasonic treatment is constant-temperature ultrasonic treatment.
Preferably, the persulfate is selected from one or more of potassium persulfate, sodium persulfate, calcium persulfate, ammonium persulfate, potassium monopersulfate, sodium monopersulfate, calcium monopersulfate and ammonium monopersulfate.
Preferably, the concentration of the persulfate is 0.1-5 mmol/L; the MoS 2 The concentration of the nanoflower is 0.1-2.0 g/L.
More preferably, the concentration of the persulfate is 1-4 mmol/L; the MoS 2 The concentration of the nanoflower is 0.1-1.0 g/L, most preferably, the MoS 2 The concentration of the nanoflower is 0.2-0.4 g/L.
Preferably, the MoS 2 The structure of the nanometer flower is a petal-shaped structure, and the petal edge of the petal-shaped structure is provided with 0-10 layers of MoS 2 Structure is as follows.
More preferably, the petal edge of the petal-shaped structure is MoS 2 The number of the structural layers is an odd number of layers ranging from 1 to 10.
Specifically, the MoS of the petal edge of the petal-shaped structure 2 The structure is similar to a crease structure, and the MoS of the petal edge of the petal-shaped structure 2 The number of layers of the structure is 1, 3 or 5.
Preferably, the MoS 2 The preparation method of the nanoflower comprises the following steps:
step 1, mixing molybdate, thiourea and a second solvent, and then adjusting the pH value to obtain an acidic mixed solution;
step 2, carrying out hydrothermal reaction on the mixed solution, and then drying to obtain MoS 2 And (5) nanometer flowers.
Specifically, in step 1, the acidic pH value is 1 to 5.
Specifically, the second solvent is selected from one or more of deionized water, distilled water and ultrapure water.
Specifically, after the hydrothermal reaction in step 2, the method further comprises: for MoS 2 The nanoflower was washed with ultrapure water and ethanol.
Preferably, in step 1, the molybdate is one or more selected from sodium molybdate and ammonium molybdate.
Preferably, in step 1, the mass ratio of the molybdate to the thiourea is 1: (1-5).
Preferably, in the step 2, the temperature of the hydrothermal reaction is 150-230 ℃, and the time of the hydrothermal reaction is 20-25 hours.
More preferably, in the step 2, the temperature of the hydrothermal reaction is 150-200 ℃, and the time of the hydrothermal reaction is 22-24 hours.
Specifically, in step 2, the drying is vacuum freeze drying.
The second aspect of the application provides the application of the activation method in environmental pollution treatment.
Specifically, the pollution sources of the environmental pollution can be soil and underground water subjected to organic pollution and organic wastewater; wherein the organic wastewater can be living organic wastewater or/and industrial organic wastewater.
In a third aspect the application provides the use of the activation method for degrading organic contaminants.
Specifically, the steps of the application include: moS is carried out 2 Ultrasonic treatment of mixed nanoflower and organic pollutant-containing solutionAnd (3) carrying out ultrasonic treatment for 10-400min to obtain a solution after degrading the organic pollutants.
Preferably, the organic contaminant is one or more of phenol, bisphenol a and rhodamine B.
The application discloses the use of MoS 2 The nanoflower can efficiently activate persulfate to generate sulfate radical and hydroxyl radical by carrying out ultrasonic treatment on persulfate in a solvent. As a typical two-dimensional (2D) material, moS synthesized in this patent 2 The nanometer flower has a petal-shaped special structure, and compared with a planar structure, the nanometer flower has higher curvature, thereby being beneficial to exposing more petal edges. Has rich single-layer MoS and few-layer MoS at the edge of each petal 2 Structure, the present application found MoS 2 The nanoflower is deformed under the ultrasonic mechanical disturbance, and the single-layer and few-layer MoS at the edge of the petal structure 2 Under the action of deformation, polarization phenomenon is easy to occur, a built-in electric field is formed, carriers are separated, and then persulfate is activated, and free radicals are generated. The persulfate is activated by a high-efficiency and low-pollution method to generate a large amount of sulfate radical and hydroxyl radical, and the obtained sulfate radical and hydroxyl radical can achieve various purposes, such as degrading organic pollutants, treating environmental pollution and the like. Therefore, the activation method provided by the application is a novel persulfate activation method, not only enriches the activation path of persulfate, but also solves the technical defects of high energy consumption existing in the existing physical persulfate activation method and environmental pollution existing in the chemical persulfate activation method.
Drawings
In order to more clearly illustrate the embodiments of the present application 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.
FIG. 1 shows the effect of persulfate activation provided in example 1 of the present application on the removal of phenol in different systems;
FIG. 2 is a MoS prepared in example 2 of the present application 2 SEM pictures of nanoflower;
FIG. 3 is a comparative example2 under the stirring condition of different rotating speeds, moS 2 The nanoflower activates the persulfate to degrade the degradation efficiency of phenol.
FIG. 4 is a MoS provided in example 1 provided in comparative example 3 2 Nanoflower and commercial MoS 2 The degradation effect of activated persulfate in the same system to degrade phenol is compared.
Detailed Description
The application provides a persulfate activation method and application thereof, which are used for solving the technical defects of high energy consumption and environmental pollution existing in the existing persulfate activation method.
The following description of the technical solutions in the embodiments of the present application will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
Wherein, the raw materials or reagents used in the following examples are all commercially available or self-made.
Example 1
The application provides an application example of the activation of the first persulfate, which comprises the following specific steps:
1、MoS 2 preparation of nanoflower: sodium molybdate and thiourea were dissolved in ultrapure water, and hydrochloric acid was added dropwise under stirring to give a pH of about 1. The resulting mixed solution was magnetically stirred for 30min and subsequently transferred to a teflon reaction kettle. Reacting for 24h at 180 ℃ by using a Teflon reaction kettle to generate black MoS 2 Vacuum freeze-drying the obtained material to obtain MoS 2 Nanoflower (labeled MoS) 2 NFs)。
2. Four different systems are designed to measure the removal effect of the degradation phenol, and the four different systems are respectively:
a. adding potassium monopersulfate to the organic pollutant wastewater containing phenol and performing ultrasonic treatment (marked as ultrasonic/PMS in figure 1);
b. addition of MoS of this example to phenol-containing organic pollutant wastewater 2 Nanoflower and sonicated (labeled ultrasound/MoS in fig. 1) 2 NFs)；
c. Adding Potassium monopersulfate and MoS of this example to phenol-containing organic pollutant wastewater 2 Nanoflower and stirring treatment (labeled stirring/PMS/MoS in FIG. 1) 2 NFs)；
d. Adding Potassium monopersulfate and MoS of this example to phenol-containing organic pollutant wastewater 2 Nanoflower and sonicated (labeled ultrasound/PMS/MoS in FIG. 1) 2 NFs)。
Experimental conditions: adding phenol into deionized water to obtain waste water of organic pollutant to be treated with initial phenol concentration of 10mg/L, wherein MoS in the steps b, c and d 2 The addition amount of the nanoflower is 0.3g/L, the concentration of the monopersulfate in the a, the c and the d is 3.25mmol/L, the ultrasonic treatment is carried out for 180min at the constant temperature of 25 ℃, 0.8mL of solution is taken out to pass through a 0.22 mu m filter membrane at 0min, 10min, 30min, 60min, 90min, 120min, 150min and 180min, 0.2mL of ethanol is added as a free radical quencher to terminate the degradation reaction, and the solution is stored in a 1.5mL brown liquid phase vial for measuring the concentration of phenol. After the reaction is finished, the waste liquid is collected into a waste liquid barrel and treated uniformly.
The phenol concentrations of the four different systems under a certain reaction time are detected, and the result is shown in fig. 1, and fig. 1 is a graph of the removal effect (organic pollutant concentration-time curve) of the persulfate activation method provided in example 1 of the present application for degrading phenol in the different systems. As can be seen from FIG. 1, moS 2 The adsorption capacity of the nanoflower on phenol is weak; the pure system with only potassium monopersulfate is almost free from degradation of phenol; moS only 2 The degradation efficiency of phenol is about 10% in the system with nanoflower; the removal capacity of the group d to phenol is strongest, and 94% of phenol can be removed within 180 min; whereas under non-ultrasonic conditions of group c, potassium monopersulfate and MoS 2 The degradation efficiency of the nanoflower system is only about 15%, which indicates that the ultrasound is carried out on MoS 2 Important synergy is achieved in the system of the nanoflower and the monopersulfateActing as a medicine.
As can be seen from the comprehensive comparison, under the ultrasonic condition, moS is used 2 The nanoflower deforms under the disturbance of ultrasound, so that the potassium monopersulfate is activated, the efficiency of activating the potassium monopersulfate can be remarkably improved, free radicals are generated, and the removal capacity of phenol is promoted.
Example 2
The present application provides MoS 2 The preparation method and analysis of the nanoflower comprise the following specific steps:
1、MoS 2 preparation of nanoflower: sodium molybdate and thiourea were dissolved in ultrapure water, and hydrochloric acid was added dropwise under stirring to give a pH of about 1. The resulting mixed solution was magnetically stirred for 30min and subsequently transferred to a teflon reaction kettle. Reacting for 24h at 180 ℃ by using a Teflon reaction kettle to generate black MoS 2 Vacuum freeze-drying the obtained material to obtain MoS 2 And (5) nanometer flowers. Taking the MoS of the embodiment 2 The nanoflower was analyzed by Scanning Electron Microscopy (SEM) and the results are shown in figure 2.
As can be seen from the scanning electron microscope image in FIG. 2, the average size of the synthesized material is less than 1 μm, and the morphology of the synthesized material is petal-shaped and uniformly distributed. MoS (MoS) 2 The large number of petal-shaped structures provides rich reactive sites. MoS is carried out 2 Nanoflower catalysts were examined SEM, TEM, and XRD. Analysis shows that MoS 2 The petal-shaped structure of the catalyst is beneficial to the activation of persulfate. And the free radical scavenger is added into the reaction system for EPR analysis and quenching experiments, so that the catalytic oxidation reaction is free radical reaction.
It can be seen that the MoS in the examples of the present application 2 The nanoflower catalyst mainly plays a role of MoS as a persulfate activator 2 The nanoflower catalyst plays a key role in degrading pollutants under the action of ultrasound, and the catalytic oxidation process is a free radical reaction.
Example 3
The application provides an application example of the activation of the second persulfate, which comprises the following specific steps:
in the process of removingAdding bisphenol A into ionized water to obtain wastewater with initial concentration of bisphenol A of 10mg/L and organic pollutant to be treated, adding 0.2g/L of MoS prepared in example 2 2 Nanoflower, potassium monopersulfate concentration of 3.25mmol/L, ultrasound at constant temperature of 25 ℃ for 180min, taking out 0.8mL of solution to pass through a 0.22 μm filter membrane during the reaction for 180min, adding 0.2mL of ethanol as a free radical quencher to terminate degradation reaction, preserving in a 1.5mL brown liquid phase vial for bisphenol A concentration measurement, and calculating the degradation efficiency of bisphenol A during the reaction time of 180min.
From the calculation, moS 2 The degradation efficiency of the nanoflower and persulfate system to bisphenol A is 85.67%, which shows MoS 2 The nanoflower catalyst can effectively activate persulfate, so that organic pollutants in water can be effectively treated, and the catalyst has certain universality in the application of treating wastewater.
Example 4
The application provides an application example of activation of a third persulfate, which comprises the following specific steps:
adding phenol into deionized water to obtain wastewater with initial concentration of phenol of 10mg/L and organic pollutant to be treated, and respectively adding 0.1g/L, 0.2g/L, 0.3g/L, 0.4g/L and 0.5g/L of MoS of example 1 2 Nanoflower, potassium monopersulfate at 3.25mmol/L, ultrasound at 25deg.C for 180min, taking out 0.8mL of solution, filtering with 0.22 μm membrane, adding 0.2mL of ethanol as free radical quencher to terminate degradation reaction, preserving in 1.5mL of brown liquid phase vial for phenol concentration measurement, and calculating reaction time for 180min, wherein each MoS is different 2 The degradation efficiency of phenol in the system with the addition of the nanoflower. The removal effect of phenol in systems with different catalyst addition amounts is shown in table 1. As can be seen from Table 1, moS in the present application 2 The proper adding concentration of the nanoflower catalyst is 0.2-0.4 g/L, more preferably MoS 2 The adding concentration of the nanoflower is 0.3g/L, when MoS 2 When the concentration of the nanoflower is more than 0.4g/L, the collision between separated carriers is enhanced due to the interaction of the built-in electric field at the edge of the catalyst, and the acting forces are mutually counteracted to MoS 2 Nanometer scaleThe efficiency of flower activation of persulfate is instead inhibited, so that the efficiency of persulfate degradation of phenol is also inhibited.
TABLE 1
| MoS 2 Nanometer flower adding amount (g/L) | Degradation efficiency (%) |
| 0.1 | 43.06 |
| 0.2 | 95.41 |
| 0.3 | 98.85 |
| 0.4 | 66.58 |
| 0.5 | 34.10 |
Example 5
The application provides an application example of the activation of the fourth persulfate, which comprises the following specific steps:
adding phenol into deionized water to obtain wastewater with initial concentration of phenol of 10mg/L and organic pollutant to be treated, adding 0.3g/L of MoS prepared in example 1 2 Nanoflower, potassium peroxodisulfate concentration of 3.25mmol/L, ultrasound at 25deg.C for 180min, taking out 0.8mL solution, filtering with 0.22 μm filter membrane, adding 0.2mL ethanol as free radical quencher to terminate degradation reaction, and preservingThe phenol degradation efficiency was measured in a 1.5mL brown liquid phase vial for phenol concentration and calculated for a reaction time of 180min.
From the calculation, moS 2 Nanoflower and potassium peroxodisulfate systems, 27.40% for phenol degradation, demonstrated MoS 2 The nanoflower catalyst can also activate the peroxydisulfate so that organic pollutants in water are treated.
Comparative example 1
The comparative example is MoS 2 The nanoflower is used for absorbing and removing organic pollutants in water by adopting a stirring treatment mode, and specifically comprises the following steps:
adding phenol into deionized water to obtain wastewater with initial concentration of phenol of 10mg/L and organic pollutant to be treated, adding MoS of 0.3g/L 2 The nanoflower is stirred at a low speed and uniform speed (200 rpm) for 180min at a temperature of 25 ℃, 0.8mL of solution is taken out to pass through a 0.22 mu m filter membrane during the reaction for 180min, 0.2mL of ethanol is added as a free radical quencher to terminate the degradation reaction, the solution is stored in a 1.5mL brown liquid phase vial for measuring the concentration of phenol, and the degradation efficiency of phenol is calculated during the reaction time of 180min.
Under the magnetic stirring condition of 200rpm, only MoS 2 When nanoflower exists, the degradation efficiency of phenol is almost 0, which indicates MoS 2 The adsorption capacity of the nanoflower on organic pollutants in water is not strong, and the removal of the organic matters is mainly carried out by MoS 2 The nanoflower is used as a catalyst to activate persulfate to generate free radicals so as to degrade pollutants, and the simple MoS 2 The adsorption of nanoflower has little effect on degrading pollutants.
Comparative example 2
The comparative example is MoS 2 The nanoflower is used for activating potassium monopersulfate to remove organic pollutants in water under the condition of magnetic stirring, and specifically comprises the following steps:
adding phenol into deionized water to obtain wastewater with initial concentration of phenol of 10mg/L and organic pollutant to be treated, adding MoS of 0.3g/L 2 The concentration of the nanoflower and the monopersulfate is 3.25mmol/L, and the nanoflower and the monopersulfate are respectively magnetically stirred at constant speeds of 0rpm, 200rpm and 450rpm for 180min at 25 ℃ to reactAt 180min, 0.8mL of the solution was removed, passed through a 0.22 μm filter, and 0.2mL of ethanol was added as a radical quencher to terminate the degradation reaction, and stored in a 1.5mL brown liquid-phase vial for phenol concentration measurement, and the degradation efficiency of phenol was calculated at 180min of reaction time. The phenol removal rate at different rotational speeds is shown in FIG. 3.
As can be seen from fig. 3, the degradation efficiency under different magnetic stirring conditions (different stirring rates) is far inferior to that of the ultrasonic action under the same system. Thus, the stirring treatment MoS 2 The deformation disturbance caused by the nanoflower is very small, and persulfate cannot be activated well, so that the persulfate generates free radicals to achieve the effect of degrading organic pollutants, and the MoS is visible under the effect of ultrasound 2 The nanoflower can activate persulfate, and can obtain more excellent pollutant degradation effect.
Comparative example 3
The present comparative example uses commercial MoS without nanoflower structure 2 The method for degrading organic pollutants in water by catalytically activating potassium monopersulfate comprises the following steps:
adding phenol into deionized water to obtain to-be-treated organic pollutant wastewater with the initial phenol concentration of 10mg/L, and dividing the to-be-treated organic pollutant wastewater into three parts:
a (marked as ultrasonic/PMS in FIG. 4) is to add potassium monopersulfate with a concentration of 3.25mmol/L, ultrasonic at constant temperature of 25 ℃ for 180min, take out 0.8mL of the solution at 0min, 10min, 30min, 60min, 90min, 120min, 150min, 180min, pass through a 0.22 μm filter membrane, add 0.2mL of ethanol as a free radical quencher to terminate the degradation reaction, and store in a 1.5mL brown liquid phase vial for determination of phenol concentration. After the reaction is finished, the waste liquid is collected into a waste liquid barrel and treated uniformly.
b (labeled ultrasonic/PMS/commercial MoS in FIG. 4) 2 ) To add 0.2g/L commercial MoS 2 (commercial MoS) 2 Is of a layered structure and does not have petal-shaped structure), the concentration of potassium monopersulfate is 3.25mmol/L, the ultrasonic treatment is carried out for 180min at the constant temperature of 25 ℃, 0.8mL of solution is taken out and passes through a 0.22 mu m filter membrane when 0min, 10min, 30min, 60min, 90min, 120min, 150min and 180min are carried out, and 0.2mL of ethanol is added as free radicalThe quencher was used to terminate the degradation reaction and was stored in a 1.5mL brown liquid vial for phenol concentration determination. After the reaction is finished, the waste liquid is collected into a waste liquid barrel and treated uniformly.
c (labeled ultrasonic/PMS/MoS in FIG. 4) 2 NFs) is added with 0.2g/L MoS 2 NFs the concentration of persulfate is 3.25mmol/L, ultrasound is carried out at constant temperature of 25deg.C for 180min, 0.8mL of solution is taken out at 0min, 10min, 30min, 60min, 90min, 120min, 150min, 180min and passed through a 0.22 μm filter membrane, and 0.2mL of ethanol is added as free radical quencher to terminate degradation reaction, and stored in a 1.5mL brown liquid phase vial for determination of phenol concentration. After the reaction is finished, the waste liquid is collected into a waste liquid barrel and treated uniformly.
The phenol concentrations of the three different systems at different times were measured, and the results are shown in fig. 4, and fig. 4 is a graph of the removal effect (organic pollutant concentration versus time) of the persulfate activation method provided in comparative example 3 of the present application for degrading phenol in the different systems. As a result, as shown in FIG. 4, the degradation efficiency of phenol was calculated by measuring the concentration of phenol in the reaction through an ultrasonic reaction for 180 minutes using commercial MoS 2 In the system of (2), the removal rate of phenol is only 16.98 percent, which is far lower than that of MoS addition 2 A system of nanoflower. Description of commercial MoS in comparison with ordinary 2 MoS synthesized in example 1 of the present application 2 NFs and the special petal structure of the water has a key effect on activating persulfate and degrading organic pollutants in water under ultrasonic conditions.
The degradation efficiency in the embodiment is calculated as follows:wherein C0 is the initial concentration of the organic pollutant, ct is the concentration of the organic pollutant at time t.
The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application and are intended to be comprehended within the scope of the present application.
Claims (1)
1. The application of the persulfate activation method in degrading organic pollutant phenol or bisphenol A is characterized by comprising the following steps:
MoS is carried out 2 Mixing nanoflower, persulfate and first solvent, performing ultrasonic treatment for 180-400 min under ultrasonic condition, and MoS 2 Nanoflower activates the persulfate to produce free radicals;
the MoS 2 The concentration of the nanoflower is 0.2-0.3 g/L;
the MoS 2 The structure of the nanometer flower is a petal-shaped structure, and the MoS at the edges of the petals of the petal-shaped structure 2 The number of structural layers is 1-10;
the persulfate is selected from one or more of potassium monopersulfate, sodium monopersulfate, calcium monopersulfate and ammonium monopersulfate;
the power of the ultrasonic wave is 50-500W, the frequency of the ultrasonic wave is 30-100 KHZ, and the temperature of the ultrasonic wave is 10-50 ℃;
the concentration of the persulfate is 0.1-5 mmol/L;
the MoS 2 The preparation method of the nanoflower comprises the following steps:
step 1, mixing molybdate, thiourea and a second solvent, and then adjusting the pH value to be 1 to obtain an acidic mixed solution;
step 2, carrying out hydrothermal reaction on the mixed solution, and then drying to obtain MoS 2 A nanoflower;
in the step 1, the mass ratio of the molybdate to the thiourea is 1: (1-5);
in the step 2, the temperature of the hydrothermal reaction is 180 ℃, and the time of the hydrothermal reaction is 24 hours.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010059973.8A CN113135594B (en) | 2020-01-19 | 2020-01-19 | Activation method of persulfate and application thereof |
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| CN202010059973.8A CN113135594B (en) | 2020-01-19 | 2020-01-19 | Activation method of persulfate and application thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN113135594B true CN113135594B (en) | 2023-07-25 |
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| CN106732668A (en) * | 2016-11-18 | 2017-05-31 | 中国计量大学 | A kind of hydrothermal preparing process of flower-shaped molybdenum bisuphide/cupric oxide composite nano materials |
| CN109607739A (en) * | 2018-12-13 | 2019-04-12 | 中山大学 | A kind of application of piezoelectric material barium titanate Ultrasound-activated persulfate in processing waste water |
| CN110217875A (en) * | 2019-05-09 | 2019-09-10 | 中国科学院城市环境研究所 | Utilize stratiform MoS2Activate the method and application of persulfate removal butyl p-hydroxybenzoate |
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| CN106732668A (en) * | 2016-11-18 | 2017-05-31 | 中国计量大学 | A kind of hydrothermal preparing process of flower-shaped molybdenum bisuphide/cupric oxide composite nano materials |
| CN109607739A (en) * | 2018-12-13 | 2019-04-12 | 中山大学 | A kind of application of piezoelectric material barium titanate Ultrasound-activated persulfate in processing waste water |
| CN110217875A (en) * | 2019-05-09 | 2019-09-10 | 中国科学院城市环境研究所 | Utilize stratiform MoS2Activate the method and application of persulfate removal butyl p-hydroxybenzoate |
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