A lattice oxygen-driven electro-negativity enhanced multi-center ozone catalyst for treating wastewater, preparation method and application

Abstract

The present application provides a lattice oxygen-driven electro-negativity enhanced multi-center ozone catalyst for treating wastewater, a preparation method and an application, belonging to the technical field of sewage treatment. The catalyst uses alumina as a skeleton, regulates the surface of the skeleton with an electro-negativity enhancer, and is prepared by impregnating an oxygen vacancy promoter and a metal activator and then calcining. The catalyst has a metal-non-metal multi-center structure, the catalytic components are uniformly dispersed, has strong stability, high and lasting catalytic performance, a long service life, and can significantly increase the amount of ozone converted into active free radicals such as hydroxyl radicals, accelerate the removal rate of target pollutants, and significantly improve the treatment efficiency. The catalyst is suitable for the advanced treatment of various refractory industrial and municipal wastewaters.

Description

Technical Field

[0001] The present invention belongs to the technical field of wastewater treatment, and relates to a lattice oxygen-driven electro-negativity enhanced multi-center ozone catalyst for treating wastewater, a preparation method and an application thereof. Background Art

[0002] With the development of technology, new and refractory organic pollutants constantly appear in industrial and municipal wastewaters, such as persistent organic pollutants, endocrine disruptors, antibiotics, microplastics, chlordane, polychlorinated biphenyls, hexachlorobenzene, hexabromobiphenyl, dioxins, furans, etc. These organic pollutants have characteristics such as environmental persistence, bioaccumulation, and long-distance environmental migration potential, and can cause endocrine disruption, reproductive and developmental toxicity, neuro- and immunotoxicity, etc. to the human body, or have an adverse impact on the ecological environment.

[0003] It is very difficult to remove the above-mentioned organic pollutants by conventional water treatment technologies. The catalytic ozonation method is a technology developed in recent years for the advanced treatment of organic pollution in wastewater. It can use a catalyst to convert ozone into more reactive reactive oxygen species (ROS) such as hydroxyl radicals (•HO) and superoxide anions (•O 2 - ). The reactive oxygen species convert new and refractory organic pollutants into small molecule compounds or completely mineralize them into carbon dioxide and water. Therefore, improving the efficiency of catalytic conversion of ozone into •HO, •O 2 - and other reactive oxygen species is a key problem to be solved urgently.

[0004] The mechanism of catalytic conversion of ozone into reactive oxygen species mainly includes: (1) surface hydroxyl groups, (2) generation of reactive oxygen species, and (3) catalyst charge balance. Among them, (1) surface hydroxyl groups are as follows: in solution, due to the introduction of metal and non-metal active sites, water molecules are strongly adsorbed on the surface of the catalyst, and then the Lewis acid sites on the catalyst surface coordinate with the surface-adsorbed water molecules, resulting in hydrolysis to form surface hydroxyl groups M-OH. (2) The generation of reactive oxygen species mainly includes two pathways: (a) Ozone is connected to the hydroxyl groups in the catalyst through electrostatic attraction or hydrogen bonds, and a series of chain reactions occur through electron transfer to generate ROS, such as •HO 3 (ozone acid radical), •HO, •O 2 - and 1 O 2 (singlet oxygen radical), etc. (b) Ozone reacts with the catalytic active sites on the catalyst. Metal ions act as active sites to transfer electrons to intermediates or act as deoxidants, weakening the H-O and O-O bonds, and the intermediate decomposes into •O 2 - and •HO 2 -, •HO2 A typical chain reaction of - will be initiated on the catalyst surface and in the liquid phase, resulting in the generation of free radicals and the formation of ROS, such as •HO, •O 2 - 、•HO 2 - (superoxide anion free radical) and 1 O 2 。(3) The catalyst charge balance means that in order to maintain the charge balance on the catalyst, under the conditions of ozone reacting with pollutants, the high-valent metal ions must be transformed into low-valent. Finally, electrons overflow from the lattice oxygen to generate oxygen, and the high-valent metal ions are reduced to low-valent metal ions again, completing the M n+ / M n+1 cycle. The lattice oxygen loses electrons and is oxidized to oxygen, and holes are formed at the original lattice oxygen position. Under the oxygen-rich state, the holes conduct electricity and are quickly reduced to lattice oxygen, thus ensuring the continuous supply of oxygen and catalytic activity. Therefore, the cyclic transformation process of lattice oxygen and oxygen vacancies is the key step and also the driving force of the whole reaction.

[0005] Based on the above mechanism of ozone catalytic conversion to reactive oxygen species, existing ozone catalysts can be divided into homogeneous and heterogeneous according to the dosing method. Heterogeneous ozone catalysts have been widely used in the water treatment industry due to their advantages such as easy separation and recovery and no secondary pollution. However, existing heterogeneous ozone catalysts generally have disadvantages such as low efficiency of ozone conversion to reactive oxygen species and easy loss of catalytic components. Summary of the Invention

[0006] The object of the present invention is to provide a lattice oxygen-driven electronegativity-enhanced multi-center ozone catalyst for treating wastewater, a preparation method and an application, so as to solve the problems of low efficiency of ozone conversion to reactive oxygen species and easy loss of catalytic components of existing heterogeneous ozone catalysts.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] The present application provides a lattice oxygen-driven electronegativity-enhanced multi-center ozone catalyst for treating wastewater. The catalyst uses alumina as the skeleton, and after regulating the surface of the skeleton with an electronegativity enhancer, it is impregnated in an oxygen vacancy promoter and a metal activator, and finally prepared by multi-stage temperature-raising calcination.

[0009] Specifically, the preparation method of the lattice oxygen-driven electronegativity-enhanced multi-center ozone catalyst for treating wastewater provided by the present application includes:

[0010] S01: Mix the pretreated alumina framework with the electronegativity enhancer solution at a solid-liquid volume ratio of 1:(1 - 2), shake and process it in a constant temperature shaker at 20 °C for 8 - 10 h, take out the alumina framework and dry it to obtain the electronegativity-enhanced alumina framework; wherein, the electronegativity enhancer solution is prepared from a sucrose solution and a urea solution.

[0011] Wash the alumina framework 3 - 4 times with deionized water to remove the adsorbed and residual impurities on the surface and inside the pores of the alumina framework. Place it in a blast drying oven and dry it at 105 °C for 2 h. Take it out after the temperature drops to room temperature to obtain the pretreated alumina framework. In this application, the alumina framework is alumina particles with a particle size of 3 - 5 mm.

[0012] Prepare a sucrose solution with a concentration of 0.2 - 0.4 mol / L and a urea solution with a concentration of 0.2 - 0.4 mol / L respectively, and mix the sucrose solution and the urea solution at a volume ratio of 1:(2 - 4) to obtain the electronegativity enhancer solution.

[0013] Mix the pretreated alumina framework and the electronegativity enhancer solution at a solid-liquid volume ratio of 1:(1 - 2) to obtain a solid-liquid mixture. Place the solid-liquid mixture in a constant temperature shaker at 20 °C and a rotation speed of 160 rpm, shake and process it for 8 - 10 h, so that the electronegativity enhancer solution adheres to the surface or inside the pores of the alumina framework through physical adsorption and / or chemical adsorption, and then functional groups are attached to the alumina framework to achieve the purpose of regulating the electron gain ability of the alumina framework by the electronegativity enhancer solution. After the shaking treatment is completed, take out the alumina framework, place it in a blast drying oven, and dry it at 105 °C for 2 h to obtain the electronegativity-enhanced alumina framework.

[0014] In addition, introducing an electronegativity enhancer onto the alumina framework can also increase the binding degree between the metal active component and the alumina framework. As a result, the metal active component is not easily lost, the stability of the catalyst is enhanced, and the service life of the catalyst is prolonged.

[0015] S02: Mix the electronegativity-enhanced alumina framework with the impregnation solution, shake and process it in a constant temperature shaker at 20 °C for 8 - 10 h, take out the alumina framework and air-dry it naturally to obtain the impregnated alumina framework. Wherein, the impregnation solution is prepared from an oxygen vacancy promoter and a metal activator.

[0016] Prepare an oxygen vacancy promoter solution with a concentration of 0.2 - 0.4 mol / L and a metal activator solution with a concentration of 0.2 - 0.4 mol / L respectively, and mix the oxygen vacancy promoter solution and the metal activator solution at a volume ratio of (1.5 - 2):1 to form an impregnation solution. Among them, the oxygen vacancy promoter includes one of cerium nitrate, cobalt nitrate, and nickel nitrate, and the metal activator includes one of manganese nitrate, iron nitrate, and copper nitrate.

[0017] Mix the electro - negativity enhanced alumina framework and the impregnating solution at a solid - to - liquid volume ratio of 1:(1 - 2) so that the electro - negativity enhanced alumina framework is impregnated in the mixed solution formed by the oxygen - vacancy promoter and the metal activator. Place the electro - negativity enhanced alumina framework and the impregnating solution in a constant - temperature shaker at 20 °C with a rotation speed of 160 rpm and shake for 8 - 10 h so that the oxygen - vacancy promoter and the metal activator adhere to the alumina framework, forming a metal - non - metal multi - center structure. After the shaking treatment, take out the alumina framework, place it in a tray, and air - dry it naturally at room temperature for 24 h to obtain an impregnated alumina framework impregnated with the oxygen - vacancy promoter and the metal activator.

[0018] S03: In N 2 Under the N atmosphere, the impregnated alumina framework is heated at a heating rate of 5 °C / min to 200 °C and held for 10 min, then heated to 400 - 500 °C and held for 60 min, and finally heated to 600 - 700 °C and held for 90 min for roasting to obtain a multi - center ozone catalyst.

[0019] Put the impregnated alumina framework into an N 2 atmosphere furnace. Under the N 2 atmosphere, set the heating rate to 5 °C / min. First, heat it to 200 °C and hold for 10 min, then heat it to 400 - 500 °C and hold for 60 min, and finally heat it to 600 - 700 °C and hold for 90 min for roasting to obtain a lattice - oxygen - driven electro - negativity enhanced multi - center ozone catalyst.

[0020] In this application, through the multi - stage heating and roasting method, it can ensure the effective decomposition of multiple metals at their respective temperatures. At the same time, after decomposition, they can effectively combine with the alumina framework to prevent loss, and can also generate metal oxide catalytic components.

[0021] The lattice - oxygen - driven electro - negativity enhanced multi - center ozone catalyst in this application is used for the advanced treatment of industrial and municipal wastewater.

[0022] The present invention has the following beneficial effects:

[0023] (1) Using alumina with a strong framework and stable chemical properties as the framework, introducing an electro - negativity enhancer on the alumina framework can increase the degree of combination between the metal active component and the alumina framework. Furthermore, the metal active component is not easily lost, enhancing the stability of the catalyst, and making the lifespan of the catalyst 1.5 times that of conventional existing catalysts.

[0024] (2) In this application, after introducing an electro - negativity enhancer on the alumina framework, an oxygen - vacancy promoter and a metal activator are introduced to form a metal - non - metal multi - center structure, and the catalytic components are evenly dispersed, having high - efficiency and persistent catalytic performance.

[0025] (3) After introducing an electronegativity enhancer onto the alumina skeleton, the electronegativity on the surface of the alumina skeleton is enhanced. Consequently, the number of acidic sites on the alumina skeleton increases, enriching the Lewis acid sites on the catalyst surface. Introducing the oxygen vacancy promoter and the metal-nonmetal multi-center structure formed by the metal activator enables water molecules to be strongly adsorbed on the catalyst surface. Subsequently, the Lewis acid sites on the catalyst surface coordinate with the water molecules adsorbed on the surface, achieving highly efficient surface hydroxyl M-OH, significantly increasing the amount of ozone converted into active free radicals such as hydroxyl radicals, accelerating the removal rate of target pollutants, and significantly improving the treatment efficiency.

[0026] (4) This catalyst is applicable to the advanced treatment of various refractory industrial and municipal wastewaters. When the influent COD concentration is 150.0 - 90.0 mg / L, after 1 h of reaction purification, the effluent COD reaches 20.0 - 40.0 mg / L, and the effluent BOD 5 / COD value reaches 0.45 - 0.65, and the removal energy efficiency is 10 - 20% higher than that of commercial catalysts. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is the morphology diagram of the lattice oxygen-driven electronegativity-enhanced multi-center ozone catalyst prepared in Example 1 of this application;

[0028] Figure 2 It is the morphology diagram of the lattice oxygen-driven electronegativity-enhanced multi-center ozone catalyst prepared in Example 3 of this application;

[0029] Figure 3 It is the morphology diagram of the lattice oxygen-driven electronegativity-enhanced multi-center ozone catalyst prepared in Example 4 of this application;

[0030] Figure 4 It is the elemental distribution spectrogram of the lattice oxygen-driven electronegativity-enhanced multi-center ozone catalyst prepared in Example 1 of this application before use;

[0031] Figure 5 It is the elemental distribution spectrogram of the lattice oxygen-driven electronegativity-enhanced multi-center ozone catalyst prepared in Example 1 of this application after use. DETAILED DESCRIPTION OF THE INVENTION

[0032] The technical solutions of the present invention will be further explained and illustrated below through specific examples.

[0033] Example 1

[0034] The present application example provides a lattice oxygen-driven electronegativity-enhanced multi-center ozone catalyst for treating wastewater. The preparation method of this catalyst includes:

[0035] S101: After washing the alumina framework three times with deionized water, place it in a forced-air drying oven and dry it at 105°C for 2 h. After the temperature drops to room temperature, take it out to obtain a pretreated alumina framework. Mix a sucrose solution with a concentration of 0.2 mol / L and a urea solution with a concentration of 0.2 mol / L according to a volume ratio of 1:4 to obtain an electronegativity enhancer solution. Mix the pretreated alumina framework and the electronegativity enhancer solution according to a solid-liquid volume ratio of 1:2, and place it in a constant-temperature shaker at 20°C with a rotation speed of 160 rpm for 8 h of shaking treatment. After the shaking treatment is completed, take out the alumina framework, place it in a forced-air drying oven, and dry it at 105°C for 2 h to obtain an electronegativity-enhanced alumina framework.

[0036] S102: Mix a cerium nitrate solution with a concentration of 0.2 mol / L and a manganese nitrate solution with a concentration of 0.2 mol / L according to a volume ratio of 2:1 to form an impregnation solution. Mix the electronegativity-enhanced alumina framework and the impregnation solution according to a solid-liquid volume ratio of 1:2, and place it in a constant-temperature shaker at 20°C with a rotation speed of 160 rpm for 8 h of shaking treatment. After the shaking treatment is completed, take out the alumina framework, place it on a tray, and air-dry it naturally at room temperature for 24 h to obtain an impregnated alumina framework impregnated with cerium nitrate and manganese nitrate.

[0037] S103: Place the impregnated alumina framework into an N 2 atmosphere furnace. Under an N 2 atmosphere, set the heating rate to 5°C / min. First, heat it to 200°C and hold for 10 min, then heat it to 500°C and hold for 60 min, and finally heat it to 600°C and hold for 90 min for roasting to obtain a lattice oxygen-driven electronegativity-enhanced multi-center ozone catalyst.

[0038] Example 2

[0039] The embodiment of the present application provides a lattice oxygen-driven electronegativity-enhanced multi-center ozone catalyst for treating wastewater. The preparation method of the catalyst includes:

[0040] S201: After washing the alumina framework four times with deionized water, place it in a forced-air drying oven and dry it at 105°C for 2 h. After the temperature drops to room temperature, take it out to obtain a pretreated alumina framework. Mix a sucrose solution with a concentration of 0.3 mol / L and a urea solution with a concentration of 0.3 mol / L according to a volume ratio of 1:3 to obtain an electronegativity enhancer solution. Mix the pretreated alumina framework and the electronegativity enhancer solution according to a solid-liquid volume ratio of 1:1, and place it in a constant-temperature shaker at 20°C with a rotation speed of 160 rpm for 10 h of shaking treatment. After the shaking treatment is completed, take out the alumina framework, place it in a forced-air drying oven, and dry it at 105°C for 2 h to obtain an electronegativity-enhanced alumina framework.

[0041] S202: Mix a cerium nitrate solution with a concentration of 0.3 mol / L and a manganese nitrate solution with a concentration of 0.3 mol / L in a volume ratio of 2:1 to form an impregnation solution. Mix the electro-negativity enhanced alumina framework with the impregnation solution in a solid-liquid volume ratio of 1:1, place it in a constant temperature shaker at 20 °C with a rotation speed of 160 rpm, and shake it for 10 h. After the shaking treatment is completed, take out the alumina framework, place it on a tray, and air-dry it naturally at room temperature for 24 h to obtain an impregnated alumina framework impregnated with cerium nitrate and manganese nitrate.

[0042] S203: Put the impregnated alumina framework into an N 2 atmosphere furnace. Under an N 2 atmosphere, set the heating rate to 5 °C / min. First, heat it to 200 °C and hold for 10 min, then heat it to 400 °C and hold for 60 min, and finally heat it to 700 °C and hold for 90 min to calcine and obtain a lattice oxygen-driven electro-negativity enhanced multi-center ozone catalyst.

[0043] Example 3

[0044] An embodiment of the present application provides a lattice oxygen-driven electro-negativity enhanced multi-center ozone catalyst for treating wastewater. The preparation method of the catalyst includes:

[0045] S301: Wash the alumina framework 3 times with deionized water, then place it in a blast drying oven and dry it at 105 °C for 2 h. Take it out after the temperature drops to room temperature to obtain a pretreated alumina framework. Mix a sucrose solution with a concentration of 0.2 mol / L and a urea solution with a concentration of 0.2 mol / L in a volume ratio of 1:4 to obtain an electro-negativity enhancer solution. Mix the pretreated alumina framework with the electro-negativity enhancer solution in a solid-liquid volume ratio of 1:2, place it in a constant temperature shaker at 20 °C with a rotation speed of 160 rpm, and shake it for 8 h. After the shaking treatment is completed, take out the alumina framework, place it in a blast drying oven, and dry it at 105 °C for 2 h to obtain an electro-negativity enhanced alumina framework.

[0046] S302: Mix a cerium nitrate solution with a concentration of 0.2 mol / L and an iron nitrate solution with a concentration of 0.2 mol / L in a volume ratio of 1.5:1 to form an impregnation solution. Mix the electro-negativity enhanced alumina framework with the impregnation solution in a solid-liquid volume ratio of 1:2, place it in a constant temperature shaker at 20 °C with a rotation speed of 160 rpm, and shake it for 8 h. After the shaking treatment is completed, take out the alumina framework, place it on a tray, and air-dry it naturally at room temperature for 24 h to obtain an impregnated alumina framework impregnated with cerium nitrate and iron nitrate.

[0047] S303: Put the impregnated alumina framework into an N 2 atmosphere furnace. Under an N 2Under the atmosphere, the heating rate is set at 5 °C / min. First, heat up to 200 °C and hold for 10 min, then heat up to 500 °C and hold for 60 min, and finally heat up to 600 °C and hold for 90 min to calcine to obtain a lattice oxygen-driven electro-negativity enhanced multi-center ozone catalyst.

[0048] Example 4

[0049] An embodiment of the present application provides a lattice oxygen-driven electro-negativity enhanced multi-center ozone catalyst for treating wastewater. The preparation method of the catalyst includes:

[0050] S401: Wash the alumina skeleton 4 times with deionized water, then place it in a blast drying oven and dry at 105 °C for 2 h. After the temperature drops to room temperature, take it out to obtain a pretreated alumina skeleton. Mix a sucrose solution with a concentration of 0.4 mol / L and a urea solution with a concentration of 0.4 mol / L according to a volume ratio of 1:2 to obtain an electro-negativity enhancer solution. Mix the pretreated alumina skeleton and the electro-negativity enhancer solution according to a solid-liquid volume ratio of 1:2, and place it in a constant temperature shaker at 20 °C with a rotation speed of 160 rpm for 8 h. After the shaking treatment is completed, take out the alumina skeleton, place it in a blast drying oven and dry at 105 °C for 2 h to obtain an electro-negativity enhanced alumina skeleton.

[0051] S402: Mix a cerium nitrate solution with a concentration of 0.4 mol / L and a copper nitrate solution with a concentration of 0.4 mol / L according to a volume ratio of 2:1 to form an impregnation solution. Mix the electro-negativity enhanced alumina skeleton and the impregnation solution according to a solid-liquid volume ratio of 1:2, and place it in a constant temperature shaker at 20 °C with a rotation speed of 160 rpm for 8 h. After the shaking treatment is completed, take out the alumina skeleton, place it on a tray and air dry at room temperature for 24 h to obtain an impregnated alumina skeleton impregnated with cerium nitrate and copper nitrate.

[0052] S403: Put the impregnated alumina skeleton into an N 2 atmosphere furnace. Under the N 2 atmosphere, set the heating rate at 5 °C / min. First, heat up to 200 °C and hold for 10 min, then heat up to 500 °C and hold for 60 min, and finally heat up to 700 °C and hold for 90 min to calcine to obtain a lattice oxygen-driven electro-negativity enhanced multi-center ozone catalyst.

[0053] The embodiments of the present application respectively take pictures of the lattice oxygen-driven electro-negativity enhanced multi-center ozone catalysts prepared in Examples 1, 3, and 4 to obtain the surface morphology of the catalysts, as shown in the appendix Figures 1-3 respectively. As can be seen from the appendix Figures 1-3 , the lattice oxygen-driven electro-negativity enhanced multi-center ozone catalysts prepared in the embodiments of the present application are all spherical, and their colors vary due to the selection of oxygen vacancy promoters and metal activators.

[0054] To prove that the catalyst prepared in the embodiments of the present application has good stability, the element distribution of the lattice oxygen-driven electronegativity-enhanced multi-center ozone catalyst prepared in Example 1 was detected before and after use, and the attached Figure 4 , 5 was obtained. From the attached Figure 4 , 5 it can be seen that before and after use, elements such as Ce, Mn, C, N, and O were detected in the catalyst. The distribution of each element was uniform before and after use, and the element distribution remained stable, indicating that the catalyst has good stability during use.

[0055] To prove that the catalyst prepared in the embodiments of the present application can deeply treat industrial and municipal wastewater, 500 mL of the catalysts prepared in Examples 1-4 were taken respectively in the embodiments of the present application. The effluent from the refining biochemical reaction collected from the refinery was used as the treatment object, and a commercial catalyst - copper-based ozone catalyst was used as the comparative example. A continuous reaction was used to carry out performance evaluation. Among them, the COD of the effluent from the refining biochemical reaction was 102.60 mg / L, the flow rate was 0.6 L / min, and the ozone dosage per minute was 3 mg / L. Samples were taken at 0 min, 15 min, 30 min, 45 min, and 60 min respectively, and the COD values of the sampled water in each group were detected. Each example group repeated the experiment 10 times respectively, and the average value was taken to obtain the results shown in Table 1.

[0056] Table 1: Performance evaluation results of each example

[0057]

[0058] As can be seen from Table 1, after 60 min of treatment with the catalyst, the COD removal rate of the commercial catalyst was 58.83%, and the effluent COD was 42.24 mg / L. For the catalysts provided in the embodiments of the present application, when treated for 15 min, the COD removal effect exceeded 50%; and when treated for 60 min, the COD removal rates were 75.52%, 68.89%, 70.57%, and 75.83% respectively, which were 16.69%, 10.06%, 11.74%, and 17% higher than that of the commercial catalyst respectively. This indicates that the catalysts prepared in the embodiments of the present application can deeply treat industrial wastewater and have good treatment effects. In addition, after repeating the experiment 10 times respectively, the removal efficiency of the catalysts in each example basically did not decrease, indicating that the catalysts prepared in the embodiments of the present application are relatively stable.

[0059] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A lattice oxygen driven electronegativity enhanced multi-center ozone catalyst for treating wastewater, characterized in that: The catalyst is prepared by using aluminum oxide as a skeleton, using an electronegativity enhancer to regulate the skeleton surface, impregnating it in an oxygen vacancy promoter and a metal activator, and calcining it; The electronegativity enhancer is prepared by a sucrose solution with a concentration of 0.2-0.4 mol / L and a urea solution with a concentration of 0.2-0.4 mol / L in a volume ratio of 1:(2-4); The oxygen vacancy promoter includes one of cerium nitrate, cobalt nitrate and nickel nitrate; The metal activator includes one of manganese nitrate, iron nitrate and copper nitrate.

2. The method for preparing the lattice oxygen driven electronegativity enhanced multi-center ozone catalyst for treating wastewater according to claim 1, characterized in that: include: The pretreated alumina framework and the electronegativity enhancer solution are mixed in a solid-liquid volume ratio of 1: (1-2), shaken in a constant temperature shaker at 20° C. for 8-10 hours, and the alumina framework is taken out and dried to obtain an electronegativity enhanced alumina framework; wherein the electronegativity enhancer solution is prepared from a sucrose solution and a urea solution; The electronegativity enhanced alumina skeleton and the impregnation solution are mixed, shaken in a constant temperature shaker at 20° C. for 8-10 hours, and the alumina skeleton is taken out and naturally air-dried to obtain an impregnated alumina skeleton; wherein the impregnation solution is prepared from an oxygen vacancy promoter and a metal activator; Under N2 atmosphere, the impregnated alumina skeleton is heated to 200°C at a heating rate of 5°C / min and kept for 10 min, then heated to 400-500°C and kept for 60 min, and finally heated to 600-700°C and kept for 90 min, and calcined to obtain a lattice oxygen driven electronegativity enhanced multi-center ozone catalyst.

3. The method for preparing the lattice oxygen driven electronegativity enhanced multi-center ozone catalyst for treating wastewater according to claim 2, characterized in that: The pretreatment of the alumina skeleton comprises: washing the alumina skeleton with deionized water for 3-4 times, drying at 105° C. for 2 hours, and obtaining a pretreated alumina skeleton after the temperature drops to room temperature.

4. The method for preparing the lattice oxygen driven electronegativity enhanced multi-center ozone catalyst for treating wastewater according to claim 2, characterized in that: The electronegativity enhancer solution is prepared by mixing a sucrose solution with a concentration of 0.2-0.4 mol / L and a urea solution with a concentration of 0.2-0.4 mol / L in a volume ratio of 1:(2-4).

5. The method for preparing the lattice oxygen driven electronegativity enhanced multi-center ozone catalyst for treating wastewater according to claim 2, characterized in that: The volume ratio of the oxygen vacancy promoter to the metal activator is (1.5-2):

1.

6. The method for preparing the lattice oxygen driven electronegativity enhanced multi-center ozone catalyst for treating wastewater according to claim 5, characterized in that: The oxygen vacancy promoter includes one of cerium nitrate, cobalt nitrate and nickel nitrate.

7. The method for preparing the lattice oxygen driven electronegativity enhanced multi-center ozone catalyst for treating wastewater according to claim 5, characterized in that: The metal activator includes one of manganese nitrate, iron nitrate and copper nitrate.

8. The method for preparing the lattice oxygen driven electronegativity enhanced multi-center ozone catalyst for treating wastewater according to claim 5, characterized in that: The solid-liquid volume ratio of the electronegativity enhanced alumina skeleton to the impregnation liquid is 1:(1-2).

9. The method for preparing the lattice oxygen driven electronegativity enhanced multi-center ozone catalyst for treating wastewater according to claim 2, characterized in that: The rotation speed of the constant temperature shaker is 160 rpm.

10. Use of the lattice oxygen driven electronegativity enhanced multi-center ozone catalyst according to claim 1 or the lattice oxygen driven electronegativity enhanced multi-center ozone catalyst prepared by any one of the methods of claims 2 to 9 in deep treatment of industrial and municipal wastewater.

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