Catalytic material taking hydrotalcite-like compound as precursor as well as preparation method and application of catalytic material

Abstract

The invention discloses a catalytic material with a hydrotalcite-like compound as a precursor as well as a preparation method and application of the catalytic material, and belongs to the technical field of catalytic materials. The preparation method of the catalytic material taking the hydrotalcite-like compound as the precursor comprises the following steps: preparing an ion mixed solution; preparing an alkali solution based on the ion mixed solution; preparing a urea solution; mixing the prepared ion mixed solution, an alkali solution and a urea solution, and carrying out hydrothermal treatment; and carrying out suction filtration, suction washing, cleaning, drying, calcining and sieving on the mixed turbid solution after the hydrothermal treatment is completed to obtain the catalytic material. The catalytic material provided by the invention takes hydrotalcite-like compound as a precursor, and has alkalinity and catalytic activity by deriving a mixed oxide, so that the catalytic material has good CO2 storage and conversion capability.

Description

Technical Field

[0001] This invention relates to the field of catalytic materials technology, specifically to a catalytic material using hydrotalcite-like precursor, its preparation method, and its application. Background Technology

[0002] Carbon dioxide (CO2), a major component of greenhouse gases, has seen its concentration rise continuously due to the excessive burning of fossil fuels, leading to drastic global climate change. Reducing CO2 emissions has become an urgent issue concerning the future development of energy, the environment, and the economy. Among the various approaches, converting CO2 into valuable chemicals, such as methanol, syngas, organic carbonates, or biodegradable polymers, has attracted widespread attention. Chemicals derived from CO2, such as methanol, are not only important chemical raw materials but also fuel substitutes, playing a crucial role in alleviating the depletion of fossil resources and promoting the development of a green economy. Converting CO2 into valuable chemicals through hydrogenation not only reduces CO2 emissions but also creates new pathways for carbon recycling.

[0003] Patent CN117861672A discloses a catalyst for methanol synthesis and its preparation method. Specifically, it discloses the preparation of an Al2O3 / CaO-based catalyst by adding copper, cesium, and vanadium, successfully improving the selectivity and stability of the methanol product. While the addition of metallic cesium and metallic vanadium to the catalyst raw materials significantly increases the catalyst's catalytic activity, metallic cesium is a precious metal and expensive, and the vanadium used has a certain degree of biotoxicity. This increases the difficulty of hazardous waste disposal after large-scale use of the catalyst.

[0004] Patent CN118162139A discloses a catalyst for the synthesis of liquid solar-powered methanol, its preparation method, and its application. Specifically, the catalyst is composed of five elements: Cu, Zn, Al, Si, and X (X = V, Cr, Mn). It is prepared using a reverse co-precipitation method, and the precipitate is aged, washed, dried, calcined, and shaped to finally obtain the catalyst required for the synthesis of liquid solar-powered methanol. While the use of vanadium and chromium in this patent significantly improves the catalytic performance, both are biotoxic, and the environmental impact of large-scale use cannot be ignored.

[0005] Currently, carbon dioxide catalytic materials mainly face the following challenges:

[0006] (1) Non-precious metal-based catalytic materials suffer from short lifespan and poor activity at lower temperatures;

[0007] (2) Although noble metal-based catalytic materials have high conversion rates, they are prone to sintering and have low selectivity. Their high cost also limits their widespread application.

[0008] (3) Although main group metal (such as lead, cadmium, etc.) based catalytic materials have shown great potential in terms of activity, selectivity and stability, their toxicity and the difficulty of hazardous waste treatment after large-scale use cannot be ignored.

[0009] In summary, current carbon dioxide catalytic materials suffer from low catalytic efficiency, high toxicity, and high cost, making the development of green, low-cost, and high-performance carbon dioxide catalytic materials particularly necessary. To address this, this invention provides a method for preparing and applying a highly efficient and low-cost catalytic material. Summary of the Invention

[0010] The purpose of this invention is to provide a catalytic material with hydrotalcite-like precursor, its preparation method, and its application, in order to solve the technical problems of low catalytic efficiency, high toxicity, and high cost of existing carbon dioxide catalytic materials.

[0011] To achieve the above objectives, one embodiment of the present invention provides a method for preparing a catalytic material using hydrotalcite-like precursors, comprising the following steps:

[0012] Preparation of ion-mixed solutions;

[0013] Preparation of alkaline solutions based on ion-mixed solutions;

[0014] Preparation of urea solution;

[0015] The prepared ion-mixed solution, alkaline solution and urea solution were mixed and subjected to hydrothermal treatment.

[0016] After hydrothermal treatment, the mixed turbid liquid is filtered, washed, cleaned, dried, calcined, and sieved to obtain the catalytic material.

[0017] In one preferred embodiment of the present invention, the ion mixed solution includes Cu ions, Zn ions, Al ions, Zr ions and Mg ions, wherein the molar ratio of Cu ions, Zn ions, Al ions, Zr ions and Mg ions is 3:1:1:x:y, where 0≤x≤1 and 0.5≤y≤1.

[0018] One preferred embodiment of the present invention is to prepare an ion-mixed solution, comprising: dissolving copper nitrate trihydrate, zinc nitrate hexahydrate, aluminum nitrate nonahydrate, zirconium nitrate pentahydrate and magnesium nitrate hexahydrate in water to obtain an ion-mixed solution.

[0019] One preferred embodiment of the present invention is to prepare an alkaline solution from an ion-mixed solution, comprising: mixing anhydrous sodium carbonate with water to prepare an alkaline solution.

[0020] In one preferred embodiment of the present invention, the concentration of the alkaline solution is 34.0 g / L-50.0 g / L.

[0021] One preferred embodiment of the present invention is to prepare a urea solution by mixing urea with water to obtain a urea solution.

[0022] In one preferred embodiment of the present invention, the concentration of the urea solution is 45.0 g / L-58.0 g / L.

[0023] One preferred embodiment of the present invention involves mixing the prepared ion-mixed solution, alkaline solution, and urea solution for hydrothermal treatment, comprising: mixing the prepared ion-mixed solution, alkaline solution, and urea solution and maintaining the mixture at a temperature of 100℃-200℃ for 24h-36h for hydrothermal treatment.

[0024] In one preferred embodiment of the present invention, the calcination temperature is 400℃-500℃, the calcination time is 4h-5h, and the sieve mesh is 40-60 mesh.

[0025] Based on the preparation method of the catalytic material with hydrotalcite-like precursor disclosed in this invention, this invention also discloses a catalytic material with hydrotalcite-like precursor, which is prepared by the above preparation method.

[0026] This invention also discloses the application of a catalytic material using hydrotalcite-like precursor in carbon dioxide catalysis.

[0027] In summary, the beneficial effects of the present invention are as follows:

[0028] 1. The raw materials for the synthesis of the catalytic material of this invention are all non-precious metals, which are abundant in the earth's crust and widely available. They are not easily affected by market supply fluctuations, thus ensuring a stable supply of catalytic materials and making them more economically feasible for large-scale industrial production.

[0029] 2. The catalytic materials of this invention, through specific formulation design and hydrotalcite-like morphology modification strategies, exhibit excellent catalytic activity and selectivity in the CCUS field (such as the hydrogenation of carbon dioxide to methanol reaction); furthermore, the use of non-precious metal catalysts reduces dependence on precious metal resources, helping to reduce the environmental impact of precious metal mining and refining processes. In addition, their application promotes the conversion and utilization of carbon dioxide, contributing to the reduction of greenhouse gas emissions.

[0030] 3. The catalytic material of the present invention has the advantages of high cost-effectiveness, abundant resources, good catalytic activity and selectivity, and environmental friendliness, and plays a positive role in promoting the resource utilization of carbon dioxide, energy transformation, reducing production costs and driving the development of related industries.

[0031] 4. The application of the catalytic material of this invention enables the efficient conversion of carbon dioxide, a greenhouse gas, into valuable chemical products, thereby realizing the resource utilization of carbon dioxide and playing a significant role in mitigating global climate change. Simultaneously, methanol, biodegradable polymers, and other chemicals, as clean and renewable energy carriers, have broad application prospects. The application of the catalyst of this invention in the field of CCUS provides technical support for the large-scale production of emerging energy carriers such as methanol, contributing to the optimization and transformation of the energy structure. Furthermore, due to the high cost-effectiveness of the catalytic material of this invention, its application can significantly reduce the production costs of related products, making its application in the energy and chemical industries more widespread and economically feasible. This is conducive to driving the development of related industries such as catalytic material preparation, reaction process optimization, and equipment design, forming a complete industrial chain and promoting sustainable economic and social development.

[0032] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention will be apparent from the effects described in the description and the accompanying drawings. Attached Figure Description

[0033] Figure 1 This is a schematic flowchart of the preparation method of the catalytic material using hydrotalcite-like precursor in this invention;

[0034] Figure 2 This is a schematic diagram illustrating the bonding principle of the catalytic material using hydrotalcite-like precursor in this invention.

[0035] Figure 3 The above are BET analysis chromatograms of the catalysts in Example 1 and Comparative Example 1 of this invention. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] This invention provides a method for preparing a catalytic material using hydrotalcite-like precursors, such as... Figure 1 As shown, it includes the following steps:

[0038] Step (1): Prepare an ion-mixed solution; specifically, dissolve copper nitrate trihydrate, zinc nitrate hexahydrate, aluminum nitrate nonahydrate, zirconium nitrate pentahydrate and magnesium nitrate hexahydrate in deionized water to obtain an ion-mixed solution. The ion-mixed solution includes Cu ions, Zn ions, Al ions, Zr ions and Mg ions. The molar ratio of Cu ions, Zn ions, Al ions, Zr ions and Mg ions is 3:1:1:x:y, where 0≤x≤1 and 0.5≤y≤1.

[0039] Step (2): Prepare an alkaline solution based on an ion-mixed solution; specifically, prepare an alkaline solution by mixing anhydrous sodium carbonate with deionized water, with a concentration of 34.0 g / L-50.0 g / L;

[0040] Step (3): Prepare urea solution; specifically, mix urea with deionized water to obtain urea solution, the concentration of which is 45.0 g / L-58.0 g / L;

[0041] Step (4): Mix the prepared ion mixed solution, alkaline solution and urea solution and perform hydrothermal treatment; specifically, mix equal amounts of ion mixed solution, urea solution and alkaline solution at 333K and put them into a high-pressure reactor with a polytetrafluoroethylene liner, and keep it in an oven at 100℃-200℃ for 24h-36h.

[0042] Step (5): After the hydrothermal treatment, the mixed turbid liquid is filtered, washed, cleaned, dried, calcined and sieved to obtain the catalyst material. Specifically, after the reaction vessel cools down naturally, the mixed turbid liquid is filtered under reduced pressure, repeatedly washed with deionized water until pH=7, then washed with ethanol and dried. The filter cake layer is placed in a 60℃ oven to dry fully, then calcined at 400℃-500℃ for 4-5 hours, and then sieved through a 40-60 mesh sieve to obtain the catalyst material.

[0043] This invention constructs a low-cost carbon dioxide catalyst by creating a unique morphology resembling hydrotalcite (LDHs). LDHs consist of interlayered anions and positively charged laminations, and do not inherently possess any adsorption sites. However, when LDHs are heated to a specific temperature, thermal decomposition occurs, causing the lamination structure to collapse and exposing more adsorption sites. The mixed oxide obtained by calcining LDHs has small and uniform grains, a large specific surface area, inhibits sintering, and exhibits good stability. Using LDHs as a precursor, this invention derives a mixed oxide with basicity and catalytic activity, thus possessing excellent CO2 storage and conversion capabilities. (See schematic diagram below.) Figure 2 As shown.

[0044] The present invention also discloses a catalytic material with hydrotalcite-like precursor, which is prepared by the above-described preparation method.

[0045] This invention also discloses the application of a catalytic material using hydrotalcite-like precursor in carbon dioxide catalysis.

[0046] Example 1

[0047] A method for preparing a catalytic material using hydrotalcite-like precursor includes the following steps:

[0048] Dissolve 3.04g copper nitrate trihydrate, 1.25g zinc nitrate hexahydrate, 1.58g aluminum nitrate nonahydrate, 1.80g zirconium nitrate pentahydrate, and 0.54g magnesium nitrate hexahydrate in 70ml of deionized water to obtain an ionic mixed solution; prepare an alkaline solution by mixing 2.89g anhydrous sodium carbonate with 70ml of deionized water; and obtain a urea solution by mixing 4.1g urea with 70ml of deionized water.

[0049] Equal volumes of ion-mixed solution, urea solution, and alkaline solution were mixed at 333 K and placed in a high-pressure reactor with a polytetrafluoroethylene liner. The reactor was then kept at 120 °C for 24 h in an oven. After the reactor cooled naturally, the mixed turbid liquid was filtered under reduced pressure and repeatedly washed with deionized water until pH = 7. Finally, it was washed with ethanol and dried. The filter cake was then placed in a 60 °C oven to dry thoroughly and calcined at 400 °C for 5 h. The catalyst was obtained by passing the calcined liquid through a 40-mesh sieve.

[0050] Example 2

[0051] A method for preparing a catalytic material using hydrotalcite-like precursor includes the following steps:

[0052] Dissolve 3.04g copper nitrate trihydrate, 1.25g zinc nitrate hexahydrate, 1.58g aluminum nitrate nonahydrate, 1.62g zirconium nitrate pentahydrate, and 0.65g magnesium nitrate hexahydrate in 70ml of deionized water to obtain an ionic mixed solution; prepare an alkaline solution by mixing 3.52g anhydrous sodium carbonate with 70ml of deionized water; and obtain a urea solution by mixing 4.10g urea with 70ml of deionized water.

[0053] Equal volumes of ion-mixed solution, urea solution, and alkaline solution were mixed at 333 K and placed in a high-pressure reactor with a polytetrafluoroethylene liner. The reactor was then kept at 120 °C for 24 h in an oven. After the reactor cooled naturally, the mixed turbid liquid was filtered under reduced pressure and repeatedly washed with deionized water until pH = 7. Finally, it was washed with ethanol and dried. The filter cake was then placed in a 60 °C oven to dry thoroughly and calcined at 400 °C for 5 h. The catalyst was obtained by passing the calcined liquid through a 40-mesh sieve.

[0054] Example 3

[0055] A method for preparing a catalytic material using hydrotalcite-like precursor includes the following steps:

[0056] Dissolve 3.04g copper nitrate trihydrate, 1.25g zinc nitrate hexahydrate, 1.58g aluminum nitrate nonahydrate, 1.44g zirconium nitrate pentahydrate, and 0.22g magnesium nitrate hexahydrate in 70ml of deionized water to obtain an ionic mixed solution; prepare an alkaline solution by mixing 3.25g anhydrous sodium carbonate with 70ml of deionized water; and obtain a urea solution by mixing 3.78g urea with 70ml of deionized water.

[0057] Equal volumes of ion-mixed solution, urea solution, and alkaline solution were mixed at 333 K and placed in a high-pressure reactor with a polytetrafluoroethylene liner. The reactor was then kept at 120 °C for 24 h in an oven. After the reactor cooled naturally, the mixed turbid liquid was filtered under reduced pressure and repeatedly washed with deionized water until pH = 7. Finally, it was washed with ethanol and dried. The filter cake was then placed in a 60 °C oven to dry thoroughly and calcined at 400 °C for 5 h. The catalyst was obtained by passing the calcined liquid through a 40-mesh sieve.

[0058] Example 4

[0059] A method for preparing a catalytic material using hydrotalcite-like precursor includes the following steps:

[0060] Dissolve 3.04g copper nitrate trihydrate, 1.25g zinc nitrate hexahydrate, 1.58g aluminum nitrate nonahydrate, 1.26g zirconium nitrate pentahydrate, and 0.86g magnesium nitrate hexahydrate in 70ml of deionized water to obtain an ionic mixed solution; prepare an alkaline solution by mixing 3.43g anhydrous sodium carbonate with 70ml of deionized water; and obtain a urea solution by mixing 4.10g urea with 70ml of deionized water.

[0061] Equal volumes of ion-mixed solution, urea solution, and alkaline solution were mixed at 333 K and placed in a high-pressure reactor with a polytetrafluoroethylene liner. The reactor was then kept at 120 °C for 24 h in an oven. After the reactor cooled naturally, the mixed turbid liquid was filtered under reduced pressure and repeatedly washed with deionized water until pH = 7. Finally, it was washed with ethanol and dried. The filter cake was then placed in a 60 °C oven to dry thoroughly and calcined at 400 °C for 5 h. The catalyst was obtained by passing the calcined liquid through a 40-mesh sieve.

[0062] Example 5

[0063] A method for preparing a catalytic material using hydrotalcite-like precursor includes the following steps:

[0064] Dissolve 3.04 g of copper nitrate trihydrate, 1.25 g of zinc nitrate hexahydrate, 1.58 g of aluminum nitrate nonahydrate, 1.08 g of zirconium nitrate pentahydrate, and 0.97 g of magnesium nitrate hexahydrate in 70 ml of deionized water to obtain an ionic mixed solution; prepare an alkaline solution by mixing 3.38 g of anhydrous sodium carbonate with 70 ml of deionized water; and obtain a urea solution by mixing 4.10 g of urea with 70 ml of deionized water.

[0065] Equal volumes of ion-mixed solution, urea solution, and alkaline solution were mixed at 333 K and placed in a high-pressure reactor with a polytetrafluoroethylene liner. The reactor was then kept at 120 °C for 24 h in an oven. After the reactor cooled naturally, the mixed turbid liquid was filtered under reduced pressure and repeatedly washed with deionized water until pH = 7. Finally, it was washed with ethanol and dried. The filter cake was then placed in a 60 °C oven to dry thoroughly and calcined at 400 °C for 5 h. The catalyst was obtained by passing the calcined liquid through a 40-mesh sieve.

[0066] Example 6

[0067] A method for preparing a catalytic material using hydrotalcite-like precursor includes the following steps:

[0068] Dissolve 3.04 g of copper nitrate trihydrate, 1.25 g of zinc nitrate hexahydrate, 1.58 g of aluminum nitrate nonahydrate, 0.90 g of zirconium nitrate pentahydrate, and 1.08 g of magnesium nitrate hexahydrate in 70 ml of deionized water to obtain an ionic mixed solution; prepare an alkaline solution by mixing 4.10 g of anhydrous sodium carbonate with 70 ml of deionized water; and obtain a urea solution by mixing 3.34 g of urea with 70 ml of deionized water.

[0069] Equal volumes of ion-mixed solution, urea solution, and alkaline solution were mixed at 333 K and placed in a high-pressure reactor with a polytetrafluoroethylene liner. The reactor was then kept at 120 °C for 24 h in an oven. After the reactor cooled naturally, the mixed turbid liquid was filtered under reduced pressure and repeatedly washed with deionized water until pH = 7. Finally, it was washed with ethanol and dried. The filter cake was then placed in a 60 °C oven to dry thoroughly and calcined at 400 °C for 5 h. The catalyst was obtained by passing the calcined liquid through a 40-mesh sieve.

[0070] Comparative Example 1

[0071] A method for preparing a catalytic material includes the following steps:

[0072] Dissolve 3.04g copper nitrate trihydrate, 1.25g zinc nitrate hexahydrate, and 1.58g aluminum nitrate nonahydrate in 70ml of deionized water to obtain an ionic mixed solution. Mix 2.45g anhydrous sodium carbonate with 70ml of deionized water to prepare an alkaline solution.

[0073] Equal volumes of an ionic mixture and an alkaline solution were mixed at a rate of 3 ml / min at 333 K, maintaining a pH of 10.0 ± 0.5. The mixture was stirred vigorously for 2 hours and then allowed to stand for 2 hours. The resulting turbid mixture was filtered under reduced pressure, repeatedly washed with deionized water until neutral, and finally washed with ethanol and dried. The filter cake was then thoroughly dried in a 60 °C oven, calcined at 400 °C for 5 hours, and passed through a 40-mesh sieve to obtain the traditional Cu3Zn1Al1O2. x catalyst.

[0074] Testing and Inspection

[0075] The catalysts prepared in Examples 1-6 and Cu3Zn1Al1O prepared in Comparative Example 1 were compared respectively. x The catalysts underwent performance testing. The carbon dioxide catalytic results for Examples 1-6 and Comparative Example 1 are shown in Table 1. The BET test results for the catalysts of Example 1 and Comparative Example 1 are also presented. Figure 3 As shown.

[0076] The test conditions were as follows: the test was conducted in a fixed-bed reactor with a reactor size of [missing information]. 0.5 g of catalyst was loaded, and 10% H2 was introduced at atmospheric pressure at a flow rate of 40 ml / min. The temperature was increased to 350 °C at a rate of 10 °C / min and maintained for 2 hours to complete the pre-reduction. The performance test conditions for the pre-reduced carbon dioxide catalyst were as follows: temperature 300 °C, pressure 5 MPa, space velocity 6000 ml / (g) cata The volumetric flow rate ratio of the reactant gases is H2:CO2:N2 = 72:24:4.

[0077] Table 1: Performance test results of CO2 hydrogenation to methanol production catalysts in Examples 1-6 and Comparative Example 1

[0078] serial number <![CDATA[CO2 conversion rate (%)]]> <![CDATA[CH3OH selectivity (%)]]> Example 1 22.9 54.6 Example 2 25.2 51.2 Example 3 28.4 48.8 Example 4 30.3 45.8 Example 5 27.0 50.8 Example 6 22.8 55.0 Comparative Example 1 18.7 32.2

[0079] From Table 1 and Figure 3 As can be seen from the performance comparison of the examples and the comparative examples, compared with the traditional copper-zinc-aluminum catalytic material (Comparative Example 1), the optimization of the hydrotalcite-like morphology and the addition of magnesium and zirconium metals effectively improved the catalytic performance of the carbon dioxide catalytic material.

[0080] In summary, the catalytic materials of the present invention exhibit excellent catalytic activity and selectivity in the field of CCUS (such as the reaction of carbon dioxide hydrogenation to methanol).

[0081] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A method for preparing a catalytic material using hydrotalcite-like precursor, characterized in that, Includes the following steps: Preparation of ion-mixed solutions; Preparation of alkaline solutions based on ion-mixed solutions; Preparation of urea solution; The prepared ion-mixed solution, alkaline solution and urea solution were mixed and subjected to hydrothermal treatment. After hydrothermal treatment, the mixed turbid liquid is filtered, washed, cleaned, dried, calcined, and sieved to obtain the catalytic material.

2. The method for preparing a catalytic material using hydrotalcite-like precursor as described in claim 1, characterized in that: The ion mixture solution includes Cu ions, Zn ions, Al ions, Zr ions and Mg ions, and the molar ratio of Cu ions, Zn ions, Al ions, Zr ions and Mg ions is 3:1:1:x:y, where 0≤x≤1 and 0.5≤y≤1.

3. A method for preparing a catalytic material using hydrotalcite-like precursor as described in claim 1 or 2, characterized in that, The preparation of the ion mixed solution includes: dissolving copper nitrate trihydrate, zinc nitrate hexahydrate, aluminum nitrate nonahydrate, zirconium nitrate pentahydrate and magnesium nitrate hexahydrate in water to obtain the ion mixed solution.

4. The method for preparing a catalytic material using hydrotalcite-like precursor as described in claim 1, characterized in that, The preparation of alkaline solution based on ion-mixed solution includes: preparing an alkaline solution by mixing anhydrous sodium carbonate with water.

5. A method for preparing a catalytic material using hydrotalcite-like precursor as described in claim 1 or 4, characterized in that: The concentration of the alkaline solution is 34.0 g / L to 50.0 g / L.

6. The method for preparing a catalytic material using hydrotalcite-like precursor as described in claim 1, characterized in that, The preparation of the urea solution includes: mixing urea with water to obtain the urea solution.

7. A method for preparing a catalytic material using hydrotalcite-like precursor as described in claim 1 or 6, characterized in that: The concentration of the urea solution is 45.0 g / L-58.0 g / L.

8. The method for preparing a catalytic material using hydrotalcite-like precursor as described in claim 1, characterized in that, The step of mixing the prepared ionic mixed solution, alkaline solution and urea solution for hydrothermal treatment includes: mixing the prepared ionic mixed solution, alkaline solution and urea solution and maintaining the temperature at 100℃-200℃ for 24h-36h for hydrothermal treatment.

9. The method for preparing a catalytic material using hydrotalcite-like precursor as described in claim 1, characterized in that: The calcination temperature is 400℃-500℃, and the calcination time is 4h-5h; the sieve used for sieving is 40 mesh-60 mesh.

10. A catalytic material using hydrotalcite-like precursor, characterized in that: It is prepared by the preparation method according to any one of claims 1-9.

11. An application of a catalytic material using hydrotalcite-like precursor as described in claim 10, characterized in that: It was applied to carbon dioxide catalysis.

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