A solid-phase catalyst for rapidly activating persulfate to degrade organic pollutants and a method for preparing and applying the same
By preparing quaternary or pentagonal transition metal sulfide catalysts, the problem of low activation activity of single metal sulfides for persulfate at room temperature was solved, achieving efficient degradation of PPCPs pollutants and making them suitable for water environment remediation.
Patent Information
- Application Number
- CN202311079186.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-08-24
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2043-08-24
AI Technical Summary
Existing monometallic sulfide catalysts exhibit low activation activity for persulfate at room temperature, making it difficult to efficiently degrade PPCPs pollutants in the environment.
Using quaternary or pentagonal transition metal sulfide catalysts, a multi-element transition metal sulfide is formed by dissolving soluble salts of transition metal elements, enhancing alkaline aqueous solution reactions, calcining, and hydrothermal treatment through preparation methods. This sulfide is then used to activate persulfate to degrade organic pollutants.
It improves the exposure of active sites and electron transfer efficiency of the catalyst, enhances the degradation efficiency of organic pollutants, and is suitable for water environment remediation.
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Figure CN117463375B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of environmental pollutant degradation technology, specifically relating to a solid-phase catalyst for rapidly activated persulfate degradation of organic pollutants and its preparation and application methods. Background Technology
[0002] In recent years, with the continuous improvement of living standards, the production and consumption of pharmaceuticals and personal care products (PPCPs) have also been increasing, leading to a gradual increase in the concentration of PPCPs in the environment. PPCPs have been detected in precipitation and natural water bodies in many countries. Although the current concentration of PPCPs in natural water bodies is low, due to their stable structure and difficulty in self-degradation, PPCPs can persist for a long time and accumulate in organisms, eventually re-entering the human body through various pathways and causing harm. Therefore, to protect the environment and human health, it is necessary to carry out advanced treatment of discharged PPCPs.
[0003] Persulfate oxidation technology based on sulfate radicals has attracted widespread attention from researchers due to its high oxidation potential, wide pH range, and long half-life. A key focus of this research is how to efficiently activate persulfate to generate the active substance sulfate radicals. Studies have shown that, in addition to external fields such as light, heat, and electricity, catalysts can also be used to activate persulfate at room temperature to degrade organic pollutants in aqueous solutions.
[0004] Researchers have discovered that transition metal oxides and transition metal sulfides can induce the decomposition of persulfate, generating reactive sulfate radicals. Among these, transition metal sulfides have attracted more attention due to their higher electrical conductivity, mechanical stability, and thermal stability.
[0005] However, due to the limited active sites and electron transfer capabilities of monometallic sulfides, their activity is generally low, and their application potential needs further development.
[0006] Therefore, there is an urgent need to develop a novel catalyst that can rapidly activate persulfate at room temperature in order to protect and restore the aquatic ecosystem. Summary of the Invention
[0007] The technical solution adopted in this invention is as follows:
[0008] In a first aspect, the present invention provides a catalyst for rapidly activating persulfate, wherein the catalyst is a quaternary or quinary transition metal sulfide, and the transition metal element is iron, cobalt, copper, zinc and molybdenum.
[0009] Secondly, the present invention provides a method for preparing the catalyst for rapidly activating persulfate as described in the first aspect, specifically comprising the following steps:
[0010] S1: Dissolve the soluble metal salt of the transition metal element in deionized water and mix to obtain solution A; the amounts of the different metal salts added are in an equimolar ratio;
[0011] S2: Add solution A obtained in step S1 to a strong alkaline aqueous solution. After the reaction, allow it to settle and then filter, wash, and dry to obtain solid substance B.
[0012] S3: The solid substance B obtained in step S2 is calcined at high temperature and then cooled to obtain solid substance C;
[0013] S4: Mix the solid substance C obtained in step S3 with an aqueous solution of sulfur source, and then carry out a hydrothermal reaction. Wash and dry the hydrothermal product to obtain a quaternary or quinary transition metal sulfide catalyst.
[0014] Preferably, in step S1, the soluble metal salt of the transition metal element is any four or five of molybdenum chloride, ferric chloride, copper chloride, cobalt chloride, and zinc chloride; in step S2, the strong base is sodium hydroxide or potassium hydroxide; and in step S3, the sulfur source is any one of thioacetamide, thiourea, or L-cysteine.
[0015] Preferably, in step S1, the concentration of each metal salt aqueous solution is 0.01 to 0.05 mol / L; in step S2, the concentration of the strong alkali aqueous solution is 1 to 3 mol / L, and the volume ratio of solution A to the strong alkali aqueous solution is 1:0.5 to 1:1.
[0016] Preferably, in step S2, the reaction is carried out at room temperature, stirred and then allowed to settle, with a stirring time of 2-12 hours and a settling time of 0.5-6 hours; the washing method is to wash with deionized water 5-20 times; the drying conditions are a drying temperature of 60-80°C and a drying time of 12-24 hours.
[0017] Preferably, in step S3, the calcination temperature is 650–1100℃, the heating rate is 2–15℃ / min, and the calcination time is 3–10h.
[0018] Preferably, in step S4, the mass ratio of solid substance C to sulfur source is 1:3 to 1:5; the hydrothermal temperature is 140 to 180°C, and the hydrothermal time is 12 to 24 hours; the washing method is washing with deionized water 3 to 15 times; and the drying conditions are a drying temperature of 60 to 80°C and a drying time of 12 to 24 hours.
[0019] Thirdly, the present invention also provides an application method for the rapid activation of persulfate catalyst to catalytically degrade organic pollutants as described in the first aspect, specifically including the following steps: adding the catalyst to the organic pollutant wastewater to be degraded, stirring, and then adding persulfate to start the degradation; the amount of the multi-element transition metal sulfide catalyst is 0.04-0.4 g / L, and the amount of persulfate added is 0.1-0.5 g / L.
[0020] Preferably, the reaction temperature is 5–45°C and the reaction time is 1–30 min.
[0021] Preferably, the persulfate is any one or a mixture of two or more of potassium persulfate, potassium peroxymonosulfate, sodium persulfate, and sodium peroxymonosulfate.
[0022] The beneficial effects achieved by this invention are as follows: The catalyst material provided by this invention, a multi-element transition metal sulfide, based on the synergistic effect of multiple elements, is conducive to exposing the active sites of the catalyst and improving the electron transfer efficiency of the catalyst; the multi-element transition metal sulfide improves the degradation efficiency of organic matter when activating persulfate to degrade water-soluble organic pollutants, and has good application prospects in the field of water environment remediation. Attached Figure Description
[0023] Figure 1 (a) is the pentagonal transition metal sulfide (MoFeCoCuZn)S prepared in Example 1. x Scanning electron microscope image at the 1µm scale;
[0024] Figure 1 (b) is the pentagonal transition metal sulfide (MoFeCoCuZn)S prepared in Example 1. x Scanning electron microscope image at the 500nm scale.
[0025] Figure 2 It is the pentagonal transition metal sulfide (MoFeCoCuZn)S prepared in Example 1 x XRD pattern.
[0026] Figure 3 This is a graph showing the degradation effect of carbamazepine on different catalytic materials and systems in Example 1.
[0027] Figure 4 In Example 1, the pentagonal transition metal sulfide (MoFeCoCuZn)S x Graphs showing the effect of synergistic degradation of carbamazepine solutions of different concentrations by persulfate.
[0028] Figure 5 In Example 1, the pentagonal transition metal sulfide (MoFeCoCuZn)S x The cyclic performance spectrum.
[0029] Figure 6 It is the quaternary transition metal sulfide (FeCoCuZn)S prepared in Example 2 x XRD pattern.
[0030] Figure 7 It is the quaternary transition metal sulfide (MoCoCuZn)S prepared in Example 3 x The degradation effect of carbamazepine is shown in the diagram.
[0031] Figure 8 It is the quaternary transition metal sulfide (MoFeCuZn)S prepared in Example 4 x Scanning electron microscope image at the 1µm scale.
[0032] Figure 9 It is the quaternary transition metal sulfide (MoFeCoZn)S prepared in Example 5 x Degradation effect diagram of carbamazepine
[0033] Figure 10 It is the quaternary transition metal sulfide (MoFeCoCu)S prepared in Example 6 x Degradation effect diagram of carbamazepine
[0034] Figure 11 This is a schematic diagram of the process for preparing a catalyst for rapidly activated persulfate by sulfidation of quaternary or pentagonal transition metals. Detailed Implementation
[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the following embodiments. It should be noted that this invention is not limited to the following embodiments.
[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
[0037] The following are schematic diagrams of the preparation process of the catalyst for rapid activation of persulfate in Examples 1-6. Figure 11 As shown.
[0038] Example 1
[0039] This embodiment provides a catalyst for the rapid activation of persulfate, which is a five-membered transition metal sulfide (MoFeCoCuZn)S x Its preparation method is as follows:
[0040] Step 1: Dissolve 0.3243g of ferric chloride hexahydrate, 0.2853g of cobalt chloride hexahydrate, 0.2046g of copper chloride dihydrate, 0.1635g of zinc chloride and 0.3278g of molybdenum pentachloride in 40mL of deionized water, and then mix them to obtain a mixed solution of multiple metal ions.
[0041] Step 2: Under vigorous stirring, the above polymetallic ion mixed solution was added dropwise to 100 mL of 2 mol / L sodium hydroxide solution. After magnetic stirring for 4 h, the mixture was allowed to stand for 1 h. The precipitate was collected by suction filtration, washed 10 times with deionized water, and dried in an oven at 80 °C for 12 h. Subsequently, the dried product was ground and transferred to a muffle furnace for calcination at 750 °C for 5 h, with a heating rate of 5 °C / min.
[0042] Step 3: Dissolve 1.295 g of thioacetamide in 80 mL of deionized water. Then, disperse 0.4 g of the calcined product in the above thioacetamide solution and transfer it to a hydrothermal reactor. React at 150 °C for 20 h. After cooling to room temperature, filter off the supernatant. Wash the precipitate 10 times with deionized water, dry it in an oven at 80 °C for 12 h, and grind it to obtain the pentagonal transition metal sulfide catalyst (MoFeCoCuZn)S. x The prepared pentagonal transition metal sulfide (MoFeCoCuZn)S x The scanning electron microscope image and XRD pattern are as follows: Figure 1 , Figure 2 As shown.
[0043] Specifically, this embodiment also provides the above-mentioned pentagonal transition metal sulfide catalyst (MoFeCoCuZn)S x Application method: Take 4mg of (MoFeCoCuZn)S x Add the carbamazepine to 50 mL of wastewater containing 20 mg / L, stir, and then add 10 mg of potassium persulfate to initiate the degradation reaction. Subsequently, take 1.5 mL samples at 1, 3, 5, 10, and 15 min, and then use HPLC to determine the remaining carbamazepine concentration in the samples. The following application comparisons are performed with the control group:
[0044] ① Comparison of the catalytic degradation effects of pentagonal transition metal sulfide catalysts with those of different catalysts:
[0045] The systems with only potassium persulfate (PMS: 0.2 g / L) and only a five-membered transition metal sulfide catalyst (MoFeCoCuZn) were compared. x ((MoFeCoCuZn)S xThe system contained molybdenum sulfide and potassium persulfate (MoS2: 0.08 g / L, PMS: 0.2 g / L), iron sulfide and potassium persulfate (FeS: 0.08 g / L, PMS: 0.2 g / L), cobalt sulfide and potassium persulfate (CoS: 0.08 g / L, PMS: 0.2 g / L), zinc sulfide and potassium persulfate (ZnS: 0.08 g / L, PMS: 0.2 g / L), and copper sulfide and potassium persulfate (CuS: 0.08 g / L, PMS: 0.2 g / L). A 20 mg / L carbamazepine solution was removed using the method described above. 1.5 mL samples were taken at 1, 3, 5, 10, and 15 min, and the remaining carbamazepine concentration was determined by HPLC. The results are as follows: Figure 3 As shown.
[0046] ② The effect of pentagonal transition metal sulfide catalysts on the degradation of pollutants of different concentrations:
[0047] Comparison of different concentrations of carbamazepine solutions on a five-membered transition metal sulfide catalyst (MoFeCoCuZn)S x The removal effect of the activated potassium persulfate system was assessed after 15 minutes of reaction, as shown in the following results. Figure 4 As shown, carbamazepine was completely removed from carbamazepine solutions of 5, 10, and 20 mg / L, with removal rates of 91.84% and 80.13% in carbamazepine solutions of 30 and 40 mg / L, respectively.
[0048] ③Stability of pentagonal transition metal sulfide catalysts:
[0049] Five-membered transition metal sulfide catalyst (MoFeCoCuZn)S x The stability test results are as follows: Figure 5 As shown: a five-membered transition metal sulfide catalyst (MoFeCoCuZn)S x Degradation experiments were conducted by adding potassium persulfate to a 20 mg / L carbamazepine solution. The five-membered transition metal sulfide catalyst (MoFeCoCuZn)S was recovered after degradation. x After washing and drying, the degradation experiment was carried out again. After 5 cycles, carbamazepine in the solution could still be completely removed.
[0050] Example 2
[0051] This embodiment provides a catalyst for the rapid activation of persulfate, which is a quaternary transition metal sulfide (FeCoCuZn)S x Its preparation method is as follows:
[0052] Step 1: Dissolve 0.3243g of ferric chloride hexahydrate, 0.2853g of cobalt chloride hexahydrate, 0.2046g of copper chloride dihydrate and 0.1635g of zinc chloride in 40mL of deionized water, and then mix them to obtain a multi-metal ion mixed solution.
[0053] Step 2: Under vigorous stirring, the above polymetallic ion mixed solution was added dropwise to 100 mL of 2 mol / L sodium hydroxide solution. After magnetic stirring for 4 h, the mixture was allowed to stand for 1 h. The precipitate was collected by suction filtration, washed 10 times with deionized water, and dried in an oven at 80 °C for 12 h. Subsequently, the dried product was ground and transferred to a muffle furnace for calcination at 750 °C for 5 h, with a heating rate of 5 °C / min.
[0054] Step 3: Dissolve 1.295 g of thioacetamide in 80 mL of deionized water. Then, disperse 0.4 g of the calcined product in the above thioacetamide solution and transfer it to a hydrothermal reactor. React at 150 °C for 20 h. After cooling to room temperature, filter off the supernatant. Wash the precipitate 10 times with deionized water, dry it in an oven at 80 °C for 12 h, and grind it to obtain the quaternary transition metal sulfide catalyst (FeCoCuZn)S. x .
[0055] The quaternary transition metal sulfide (FeCoCuZn)S prepared in this embodiment x The XRD pattern is as follows Figure 6 As shown.
[0056] Example 3
[0057] This embodiment provides a catalyst for the rapid activation of persulfate, which is a quaternary transition metal sulfide (MoCoCuZn)S x Its preparation method is as follows:
[0058] Step 1: Dissolve 0.2853g of cobalt chloride hexahydrate, 0.2046g of copper chloride dihydrate, 0.1635g of zinc chloride and 0.3278g of molybdenum pentachloride in 40mL of deionized water, and then mix them to obtain a mixed solution of multiple metal ions.
[0059] Step 2: Under vigorous stirring, the above polymetallic ion mixed solution was added dropwise to 100 mL of 2 mol / L sodium hydroxide solution. After magnetic stirring for 4 h, the mixture was allowed to stand for 1 h. The precipitate was collected by suction filtration, washed 10 times with deionized water, and dried in an oven at 80 °C for 12 h. Subsequently, the dried product was ground and transferred to a muffle furnace for calcination at 750 °C for 5 h, with a heating rate of 5 °C / min.
[0060] Step 3: Dissolve 1.567 g of thioacetamide in 80 mL of deionized water. Then, disperse 0.4 g of the calcined product in the above thioacetamide solution and transfer it to a hydrothermal reactor. React at 150 °C for 20 h. After cooling to room temperature, filter off the supernatant. Wash the precipitate 10 times with deionized water, dry it in an oven at 80 °C for 12 h, and grind it to obtain the quaternary transition metal sulfide catalyst (MoCoCuZn)S. x .
[0061] This embodiment also provides the above-mentioned quaternary transition metal sulfide catalyst (MoCoCuZn)S x Application method: Take 4mg (MoCoCuZn)S x Add the carbamazepine to 50 mL of wastewater containing 20 mg / L, stir, and then add 10 mg of potassium persulfate to start the degradation reaction. Subsequently, take 1.5 mL samples at 1, 3, 5, 10, and 15 min, and then use HPLC to detect the concentration of the remaining carbamazepine in the samples.
[0062] The degradation effect of the quaternary transition metal sulfide (MoCoCuZn)Sx prepared in this embodiment on carbamazepine is shown in the figure below. Figure 7 As shown.
[0063] Example 4
[0064] This embodiment provides a catalyst for the rapid activation of persulfate, which is a quaternary transition metal sulfide (MoFeCuZn)S x Its preparation method is as follows:
[0065] Step 1: Dissolve 0.1081g of ferric chloride hexahydrate, 0.0682g of copper chloride dihydrate, 0.0545g of zinc chloride and 0.1093g of molybdenum pentachloride in 40mL of deionized water, and then mix them to obtain a mixed solution of multiple metal ions.
[0066] Step 2: Under vigorous stirring, the above polymetallic ion mixed solution was added dropwise to 100 mL of 2 mol / L sodium hydroxide solution. After magnetic stirring for 4 h, the mixture was allowed to stand for 1 h. The precipitate was collected by suction filtration, washed 10 times with deionized water, and dried in an oven at 80 °C for 12 h. Subsequently, the dried product was ground and transferred to a muffle furnace for calcination at 750 °C for 5 h at a heating rate of 10 °C / min.
[0067] Step 3: Dissolve 1.580 g of thioacetamide in 80 mL of deionized water. Then, disperse 0.4 g of the calcined product in the above thioacetamide solution and transfer it to a hydrothermal reactor. React at 150 °C for 16 h. After cooling to room temperature, filter off the supernatant. Wash the precipitate 10 times with deionized water, dry it in an oven at 80 °C for 12 h, and grind it to obtain the quaternary transition metal sulfide catalyst (MoFeCuZn)S.x The prepared quaternary transition metal sulfide (MoFeCuZn)S x Scanning electron microscope image as follows Figure 8 As shown.
[0068] Example 5
[0069] This embodiment provides a catalyst for the rapid activation of persulfate, which is a quaternary transition metal sulfide (MoFeCoZn)S x Its preparation method is as follows:
[0070] Step 1: Dissolve 0.3243g of ferric chloride hexahydrate, 0.2853g of cobalt chloride hexahydrate, 0.1635g of zinc chloride and 0.3278g of molybdenum pentachloride in 40mL of deionized water, and then mix them to obtain a mixed solution of multiple metal ions.
[0071] Step 2: Under vigorous stirring, the above polymetallic ion mixed solution was added dropwise to 100 mL of 3 mol / L sodium hydroxide solution. After magnetic stirring for 4 h, the mixture was allowed to stand for 4 h. The precipitate was collected by suction filtration, washed 10 times with deionized water, and dried in an oven at 60 °C for 24 h. Subsequently, the dried product was ground and transferred to a muffle furnace for calcination at 1100 °C for 5 h, with a heating rate of 5 °C / min.
[0072] Step 3: Dissolve 1.600 g of thioacetamide in 80 mL of deionized water. Then, disperse 0.4 g of the calcined product in the above thioacetamide solution and transfer it to a hydrothermal reactor. React at 150 °C for 24 h. After cooling to room temperature, filter off the supernatant. Wash the precipitate 15 times with deionized water and dry it in a 60 °C oven for 24 h. Grind the precipitate to obtain the quaternary transition metal sulfide catalyst (MoFeCoZn)S. x .
[0073] This embodiment also provides the above-mentioned quaternary transition metal sulfide catalyst (MoFeCoZn)S x Application method: Take 4mg (MoFeCoZn)S x Add the carbamazepine to 50 mL of wastewater containing 20 mg / L, stir, and then add 10 mg of potassium persulfate to start the degradation reaction. Subsequently, take 1.5 mL samples at 1, 3, 5, 10, and 15 min, and then use HPLC to detect the concentration of the remaining carbamazepine in the samples.
[0074] The quaternary transition metal sulfide (MoFeCoZn)S prepared in this embodiment x The degradation effect of carbamazepine is shown in the figure below. Figure 9 As shown.
[0075] Example 6
[0076] This embodiment provides a catalyst for the rapid activation of persulfate, which is a quaternary transition metal sulfide (MoFeCoCu)S x Its preparation method is as follows:
[0077] Step 1: Dissolve 0.3243g of ferric chloride hexahydrate, 0.2853g of cobalt chloride hexahydrate, 0.2046g of copper chloride dihydrate and 0.3278g of molybdenum pentachloride in 40mL of deionized water, and then mix them to obtain a mixed solution of multiple metal ions.
[0078] Step 2: Under vigorous stirring, the above polymetallic ion mixed solution was added dropwise to 200 mL of 1 mol / L sodium hydroxide solution. After magnetic stirring for 2 h, the mixture was allowed to stand for 4 h. The precipitate was collected by suction filtration, washed 20 times with deionized water, and dried in an oven at 80 °C for 12 h. Subsequently, the dried product was ground and transferred to a muffle furnace for calcination at 750 °C for 5 h at a heating rate of 15 °C / min.
[0079] Step 3: Dissolve 1.607 g of thioacetamide in 80 mL of deionized water. Then, disperse 0.4 g of the calcined product in the above thioacetamide solution and transfer it to a hydrothermal reactor. React at 150 °C for 20 h. After cooling to room temperature, filter off the supernatant. Wash the precipitate 10 times with deionized water, dry it in an oven at 80 °C for 12 h, and grind it to obtain the quaternary transition metal sulfide catalyst (MoFeCoCu)S. x .
[0080] This embodiment also provides the above-mentioned quaternary transition metal sulfide catalyst (MoFeCoCu)S x Application method: Take 4mg (MoFeCoCu)S x Add the carbamazepine to 50 mL of wastewater containing 20 mg / L, stir, and then add 10 mg of potassium persulfate to start the degradation reaction. Subsequently, take 1.5 mL samples at 1, 3, 5, 10, and 15 min, and then use HPLC to detect the concentration of the remaining carbamazepine in the samples.
[0081] The quaternary transition metal sulfide (MoFeCoCu)S prepared in this embodiment x The degradation effect of carbamazepine is shown in the figure below. Figure 10 As shown.
Claims
1. A method for rapidly activating persulfate catalysts to catalytically degrade organic pollutants, characterized in that, Specifically, the steps include: adding the catalyst to the organic pollutant wastewater to be degraded, stirring, and then adding persulfate to begin degradation; the catalyst is a quaternary or quinary transition metal sulfide, and the transition metal elements are iron, cobalt, copper, zinc, and molybdenum, with a molar ratio of 1 for each transition metal element.
2. The application method of the rapidly activated persulfate catalyst for the catalytic degradation of organic pollutants according to claim 1, characterized in that, The preparation method of the catalyst specifically includes the following steps: S1: Dissolve the soluble metal salts of the transition metal elements in deionized water and mix to obtain solution A; the amounts of different metal salts added are in equimolar ratio; S2: Add solution A obtained in step S1 to a strong alkaline aqueous solution. After the reaction, allow it to settle and then filter, wash, and dry to obtain solid substance B. S3: The solid substance B obtained in step S2 is calcined at high temperature and then cooled to obtain solid substance C; S4: The solid substance C obtained in step S3 is mixed with an aqueous solution of sulfur source and then subjected to a hydrothermal reaction. The product after hydrothermal reaction is washed and dried to obtain a quaternary or quinary transition metal sulfide catalyst.
3. The application method of rapidly activated persulfate catalyst for catalytic degradation of organic pollutants according to claim 2, characterized in that, In step S1, the soluble metal salt of the transition metal element is any four or five of the following: molybdenum chloride, ferric chloride, copper chloride, cobalt chloride, and zinc chloride; in step S2, the strong base is sodium hydroxide or potassium hydroxide; in step S4, the sulfur source is any one of thioacetamide, thiourea, and L-cysteine.
4. The application method of rapidly activated persulfate catalyst for catalytic degradation of organic pollutants according to claim 2, characterized in that, In step S1, the concentration of each metal salt aqueous solution is 0.01~0.05 mol / L; in step S2, the concentration of the strong base aqueous solution is 1~3 mol / L, and the volume ratio of solution A to the strong base aqueous solution is 1:0.5~1:
1.
5. The application method of the rapidly activated persulfate catalyst for the catalytic degradation of organic pollutants according to claim 2, characterized in that, In step S2, the reaction is carried out at room temperature, stirred and then allowed to settle. The stirring time is 2-12 hours and the settling time is 0.5-6 hours. The washing method is to wash with deionized water 5-20 times. The drying conditions are a drying temperature of 60-80°C and a drying time of 12-24 hours.
6. The application method of the rapidly activated persulfate catalyst for the catalytic degradation of organic pollutants according to claim 2, characterized in that, In step S3, the calcination temperature is 650~1100℃, the heating rate is 2~15℃ / min, and the calcination time is 3~10h.
7. The application method of rapidly activated persulfate catalyst for catalytic degradation of organic pollutants according to claim 2, characterized in that, In step S4, the mass ratio of solid substance C to sulfur source is 1:3 to 1:5; the hydrothermal temperature is 140 to 180°C, and the hydrothermal time is 12 to 24 hours; the washing method is to wash with deionized water 3 to 15 times; the drying conditions are a drying temperature of 60 to 80°C and a drying time of 12 to 24 hours.
8. The application method of the rapidly activated persulfate catalyst for the catalytic degradation of organic pollutants according to claim 1, characterized in that, Specifically, the steps include: adding the catalyst to the organic pollutant wastewater to be degraded, stirring, and then adding persulfate to begin degradation; the amount of the catalyst is 0.04~0.4 g / L, and the amount of persulfate added is 0.1~0.5 g / L.
9. The application method of the rapidly activated persulfate catalyst for the catalytic degradation of organic pollutants according to claim 8, characterized in that, The degradation reaction temperature is 5~45℃, and the reaction time is 1~30min.
10. The application method of the rapidly activated persulfate catalyst for the catalytic degradation of organic pollutants according to claim 8, characterized in that, The persulfate is any one or a mixture of two or more of potassium persulfate, potassium peroxymonosulfate, sodium persulfate, and sodium peroxymonosulfate.