Mesoporous material taking cement-based material as precursor as well as preparation method and application of mesoporous material
By using carbonization decalcification of cement-based materials as precursors and alkaline leaching to extract silicon and aluminum ions, combined with template agent self-assembly and calcination to prepare mesoporous materials, the problems of high cost and environmental pollution of traditional methods are solved, realizing the green synthesis of high-performance mesoporous materials and the efficient recycling of cement-based waste.
Patent Information
- Application Number
- CN202511777478.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-28
- Publication Date
- 2026-01-20
AI Technical Summary
Traditional methods for synthesizing mesoporous materials are costly, cause significant environmental pollution, and are difficult to precisely control the mesoporous structure and nanoparticle morphology. Existing methods for treating cement-based waste are inefficient, and impurity ions interfere with mesoporous formation.
Using cement-based materials as precursors, silicate and aluminate are extracted by carbonization decalcification and alkaline leaching. A template agent is added and the pH value is adjusted to facilitate self-assembly. Finally, mesoporous materials are prepared by extraction or calcination.
A low-cost, environmentally friendly mesoporous material has been synthesized, which has high specific surface area, porosity and pore size uniformity, and is suitable for catalysis, adsorption, drug delivery and sensor fields, promoting the high-value utilization of cement-based waste.
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Figure CN121362068A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of building materials, in particular to a mesoporous material taking cement-based material as a precursor and a preparation method and application thereof. BACKGROUND
[0002] Mesoporous materials exhibit broad application prospects in the fields of catalysis, adsorption separation, biomedical science and energy storage due to their unique pore structure, high specific surface area and controllable physical and chemical properties. The synthesis methods of traditional mesoporous materials mainly include sol-gel method, template method and hydrothermal synthesis method, etc. However, these synthesis methods usually need expensive precursors and complex synthesis steps, which not only have high cost, but also have problems such as generation of harmful gas and discharge of waste. In addition, the existing methods still face challenges in accurately controlling the mesoporous structure (such as pore size distribution and pore order) and nanoparticle morphology, which limits the performance optimization and practical application of the materials.
[0003] In recent years, the resource utilization of solid waste has become an important way to alleviate environmental pressure and promote circular economy. Ordinary Portland cement (OPC) and its waste, as the main by-products of the construction industry, are rich in SiO2 and Al2O3 components, which can theoretically be used as cheap silicon-aluminum sources for synthesizing mesoporous materials. Studies have shown that by optimizing the extraction process, OPC waste can be converted into high-value mesoporous silica or aluminosilicate materials, which can not only reduce raw material costs, but also reduce carbon emissions during cement production. However, the existing technology still has limitations in the treatment of OPC waste: on the one hand, the complex phase of cement hydration products leads to low silicon-aluminum dissolution efficiency; on the other hand, impurity ions in waste cement may interfere with the formation of mesoporous structure, and efficient purification and structure control strategies need to be developed. Therefore, exploring green synthesis routes using cement-based materials and their waste as precursors, which have environmental friendliness and economic feasibility, is an important research direction in the field of mesoporous material preparation.
[0004] In view of this, the present application is proposed. SUMMARY
[0005] In view of the above problems, the present application provides a mesoporous material taking cement-based material as a precursor and a preparation method and application thereof, which is used to realize high-value cyclic utilization of cement-based materials and their waste.
[0006] The present application is implemented as follows: The application provides a preparation method of mesoporous material taking cement-based material as a precursor, which comprises the following steps: firstly introducing carbon dioxide or carbonate into the cement-based material to perform decalcification; secondly adopting an alkali leaching method to promote the dissolution of silicate and aluminate; then adding a template agent into the leaching solution and adjusting the pH value to promote the self-assembly process of silicate and aluminate and the template agent; finally obtaining the mesoporous material taking the cement-based material as the precursor through extraction or calcination.
[0007] In some preferable embodiments, the carbonate is MCO3, wherein M is at least one of Al, Fe, Ca, Na, K, Mg and Ti; And / or, the flux of CO2 is 0.1-5 L / min per liter of aqueous solution; And / or, the amount of MCO3 is 0.1-2 mol per gram of cement-based material.
[0008] In some preferable embodiments, the alkali leaching method adopts an alkali solution which is at least one of MOH and MCO3; Wherein M is at least one of Al, Fe, Ca, Na, K, Mg and Ti; And / or, the amount of the alkali solution is 0.5-5 mol / L.
[0009] In some preferable embodiments, the template agent comprises at least one of organic template agent, nano-carbon template agent, aerogel template agent and nano-calcium carbonate template agent; the amount of the template agent is 0.1-4 wt% of the leaching solution; And / or, the organic template agent comprises at least one of cetyltrimethylammonium bromide, multi-block copolymer P123 and multi-block copolymer F127; And / or, the nano-carbon template agent comprises at least one of carbon nanotube, nano-carbon fiber and nano-carbon black.
[0010] In some preferable embodiments, the pH value is adjusted by using at least one of CO2 or acidic reagent; the pH value is 7-12; And / or, the acidic reagent is at least one of hydrochloric acid, sulfuric acid, nitric acid or perchloric acid.
[0011] In some preferable embodiments, the cement-based material is cement-based material with different hydration degrees and different mineral compositions; The cement-based material comprises at least one of dicalcium silicate, tricalcium silicate, tricalcium aluminate, tetracalcium aluminoferrite, hydrated calcium silicate and hydrated calcium silicate aluminate; or the cement-based material contains 50-100 wt% of cement and 0-50 wt% of other pozzolanic materials, the specifications of the cement include 325, 425 or 525, and the other pozzolanic materials include at least one of blast furnace slag powder, fly ash and silica fume.
[0012] In some preferred embodiments, the self-assembly process is followed by an aging process; the aging process is at room temperature or hydrothermal environment; the aging process is for 1-48 hours.
[0013] In some preferred embodiments, the calcination environment is atmospheric environment, the calcination temperature is 400-700℃, and the calcination time is 2-10 hours. And / or, the extraction temperature is 15-80℃, the extraction time is 0.5-24h, and the solid-liquid ratio is 1: (5-20).
[0014] The application also provides a mesoporous material with cement-based material as a precursor prepared by the above preparation method, wherein the mesoporous material with cement-based material as a precursor is a mesoporous material with amorphous pore walls or a mesoporous material with crystal pore walls.
[0015] In addition, the application also provides an application of the above mesoporous material with cement-based material as a precursor in the fields of catalysis, adsorption, drug transportation or sensors.
[0016] The application has the following beneficial effects: The application uses cement-based materials and their wastes as precursors to prepare mesoporous materials, which not only solves the problems of high raw material cost and environmental pollution in the synthesis process of traditional mesoporous materials, but also realizes high-value resource utilization of cement-based wastes, and has significant economic and environmental benefits. The prepared mesoporous materials have the characteristics of high specific surface area, high porosity, uniform pore size, adjustable size, controllable silicon-aluminum ratio and cleanliness, and the performance of the mesoporous materials can be adjusted by adjusting the composition and hydration degree of the cement-based materials, so as to meet the needs of different application scenarios. The method is simple, low in cost and easy to scale up, and provides an innovative solution for green synthesis of mesoporous materials and efficient recovery of cement-based solid wastes, which has important scientific significance and engineering application value. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.
[0018] Figure 1 The figure is a schematic diagram of the morphology structure of the mesoporous material with cement-based material as a precursor in the embodiments of the application. Figure 2 The figure is an X-ray diffraction pattern of the mesoporous material with amorphous pore walls in the embodiments of the application. Figure 3 X-ray diffraction pattern of the mesoporous material with zeolite crystal as the pore wall in the embodiment of the present application; Figure 4 Fourier transform infrared absorption spectrum of the mesoporous material in the embodiment of the present application; Figure 5 Scanning electron microscope image of the mesoporous material in the embodiment of the present application; Figure 6 Transmission electron microscope image of the mesoporous material in the embodiment of the present application; Figure 7 Nitrogen adsorption data chart of the mesoporous material in the embodiment of the present application; Figure 8 Chart of the relationship between the specific surface area, pore volume of the mesoporous material and the hydration degree of the cement-based material in the embodiment of the present application; Figure 9 Chart of the relationship between the pore wall thickness of the mesoporous material and the hydration degree of the cement-based material in the embodiment of the present application. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical scheme and advantages of the embodiment of the present application more clear, the technical scheme in the embodiment of the present application will be described clearly and completely below. If the specific conditions are not specified in the embodiment, the conventional conditions or the conditions recommended by the manufacturer are adopted. If the reagents or instruments are not specified by the manufacturer, they are all conventional products that can be purchased in the market.
[0020] The mesoporous material with cement-based material as the precursor and the preparation method and application thereof provided by the present application will be described in detail below.
[0021] The inventors found that the mesoporous material is currently prepared by the hydrolysis and condensation process of organic-inorganic materials, which has the problems of high cost of raw materials and serious pollution. The cement-based material has low production cost, and there is a large amount of recycled cement-based material, and the large amount of silicate and aluminate contained in the cement-based material determines that the cement-based material is a good precursor for producing mesoporous materials. Therefore, the use of cement-based materials and waste to produce mesoporous materials not only reduces the production cost, but also achieves the purpose of carbon fixation and reduction.
[0022] In a first aspect, the present application provides a preparation method of a mesoporous material with cement-based material as the precursor. The method innovatively uses cement-based material as the precursor for preparing mesoporous material, extracts silicate and aluminate from the cement-based material through purification and alkali leaching, realizes the synthesis of mesoporous material with the help of a template agent, and controls the performance of the mesoporous material (such as specific surface area, pore volume, particle size, silicon-aluminum ratio, crystallinity, etc.) through the composition and hydration degree of the cement-based material.
[0023] The preparation method comprises the following steps: S1, introducing carbon dioxide or carbonates into the cement-based material to decalcify; The reaction process includes the following chemical equations:
[0024]
[0025]
[0026]
[0027]
[0028]
[0029]
[0030]
[0031] In some preferred embodiments, the cement-based material is a cement-based material with different hydration degrees and mineral compositions. In some embodiments, the cement-based material can have a hydration degree of 0-100%. The cement-based material with different hydration degrees can be artificially pre-hydrated or recycled from construction waste.
[0032] In some embodiments, the cement-based material includes at least one of dicalcium silicate, tricalcium silicate, tricalcium aluminate, tetracalcium aluminoferrite, hydrated calcium silicate, and hydrated calcium aluminate silicate; or the cement-based material contains 50-100 wt% of cement and 0-50 wt% of other pozzolanic materials, the cement has a specification including 325, 425, or 525, and the other pozzolanic materials include at least one of blast furnace slag powder, fly ash, and silica fume.
[0033] It should be noted that the present application does not have special restrictions on the specification of the cement used, and conventional Portland cement in the art can be used. The strength grade of the cement can be, for example, 325, 425, or 525, etc. Those skilled in the art can select according to the performance and cost of the mesoporous material required. In some embodiments, the weight ratio of water to cement-based material (referred to as water-cement ratio) during decalcification and acid leaching is 5-200, such as 5, 10, 100, or 200, etc. The water and cement-based material are mixed at this weight ratio, and too low water-cement ratio cannot guarantee sufficient water for cement hydration, and too high water-cement ratio makes the setting very slow.
[0034] In some preferred embodiments, the carbonates are MCO3, wherein M is at least one of Al, Fe, Ca, Na, K, Mg, and Ti. And / or, the flux of CO2 is 0.1-5 L / min per liter of aqueous solution. And / or, the amount of MCO3 is 0.1-2 mol per gram of cement-based material.
[0035] It should be noted that M includes but is not limited to Al, Fe, Ca, Na, K, Mg and Ti, and any commercially available or known carbonate in the art is suitable for the present application.
[0036] S2, secondly, an alkali leaching method is used to promote the dissolution of silicate and aluminate; The reaction process is as follows:
[0037]
[0038] In some preferred embodiments, the alkali leaching method uses at least one of MOH and MCO3 as the alkali solution; Wherein M is at least one of Al, Fe, Ca, Na, K, Mg and Ti; And / or, the amount of the alkali solution is 0.5-5 mol / L.
[0039] It should be noted that the alkali leaching method uses the same common metal M in the alkali solution and the common metal M in the carbonate reagent.
[0040] S3, then a template agent is added to the leaching solution, and the pH value is adjusted to promote the self-assembly process of silicate and aluminate and the template agent; The reaction process is as follows:
[0041] In some preferred embodiments, the template agent includes at least one of an organic template agent, a nano-carbon template agent, an aerogel template agent and a nano-calcium carbonate template agent; It should be noted that the present application does not have special restrictions on the template agent used, and the template agent of the prior art can be used. The template agent includes but is not limited to an organic template agent, a nano-carbon template agent, an aerogel template agent and a nano-calcium carbonate template agent, etc., and the person skilled in the art can select according to the performance and cost of the required mesoporous material.
[0042] The amount of the template agent is 0.1-4 wt% of the leaching solution; And / or, the organic template agent includes at least one of cetyltrimethylammonium bromide, a multi-block copolymer P123 and a multi-block copolymer F127; In the present application, the pH value is adjusted by using at least one of CO2 or an acidic reagent; and the pH value is 9-11.
[0043] Preferably, the acidic reagent is at least one of hydrochloric acid, sulfuric acid, nitric acid or perchloric acid.
[0044] It should be noted that the acidic reagent includes but is not limited to hydrochloric acid, sulfuric acid, nitric acid or perchloric acid, and any commercially available or known acidic solvent in the art is suitable for the present application.
[0045] In some preferred embodiments, the self-assembly process is followed by an aging process; The aging process is in a room temperature environment or a hydrothermal environment; The aging process takes 1-48 hours.
[0046] S4, finally, the mesoporous material with cement-based material as the precursor is obtained by extraction or calcination.
[0047] In some embodiments, the calcination environment of the mesoporous material is an atmospheric environment, the calcination temperature is 400-700°C, and the calcination time is 2-10 hours to sufficiently remove the template or promote the crystallization and reorganization of the mesoporous wall.
[0048] In some preferred embodiments, the extraction agent of the mesoporous material can be selected from an acidic solution, an alkaline solution or an organic solvent. When an acidic extraction agent is selected, its pH value is 1-5; when an alkaline extraction agent is selected, its pH value is 9-13, the extraction temperature is 15-80°C, and the extraction time is 0.5-24h, which can be adjusted appropriately according to the dissolution rate of the material.
[0049] Further, the solid-liquid ratio of the extraction is 1: (5-20) to ensure sufficient contact between the material and the extraction agent, and the extraction can be performed 1-5 times of continuous extraction to improve the extraction efficiency.
[0050] In addition, in optional embodiments, the extraction is followed by a post-treatment, in which the solid-liquid two phases are separated by filtration or centrifugation, the liquid phase can be further recovered for the required components, and the solid phase is the mesoporous material.
[0051] In a second aspect, the present application provides a mesoporous material with cement-based material as the precursor, which is prepared by the above preparation method.
[0052] In some preferred embodiments, the mesoporous material with amorphous pore wall or crystalline pore wall can be obtained by the above preparation method, and the mesoporous material has the characteristics of high specific surface area, high porosity, uniform pore size and adjustable pore wall, as shown in Figure 1 .
[0053] In a third aspect, the present application provides an application of the mesoporous material with cement-based material as the precursor in the fields of catalysis, adsorption, drug transportation or sensors.
[0054] In some preferred embodiments, the mesoporous material with amorphous pore wall has good biocompatibility and good degradability, and can be used in the field of drug delivery; and the mesoporous material with zeolite crystal pore wall has good chemical stability, and can be used in the fields of catalysis, adsorption, etc.
[0055] The features and performances of the present application are further described in detail below in combination with embodiments.
[0056] Embodiment 1 The present embodiment provides a preparation method of mesoporous material with cement-based material as precursor, comprising the following steps: (1) Mix deionized water and tricalcium silicate according to water-cement ratio of 100:1, and stir at 600 rpm for 24 hours, so that the hydration degree of tricalcium silicate reaches 60%; then add Na2CO3 solution to the mixture, so that the concentration is 1 mol / L, continue to stir for 2 hours to decalcify tricalcium silicate and hydration product, and dissolve silicate radical in aqueous solution, and filter the suspension with filter paper to obtain silicate leaching solution.
[0057] (2) Add template agent cetyltrimethylammonium bromide (CTAB) to the leaching solution, with a concentration of 8 g / L, heat to 60°C to promote the dissolution of CTAB, stop heating when the leaching solution becomes clear, and wait for the leaching solution to return to room temperature.
[0058] (3) Adjust the pH value by introducing CO2 gas into the leaching solution, with a flux of 500 mL / min per liter of leaching solution, and stop the introduction of carbon dioxide when the pH value is adjusted to 10. Through the self-assembly process, a large amount of white product will appear in the leaching solution, which is a mesoporous material containing CTAB.
[0059] (4) After 24 hours of aging treatment, the silicate is fully polymerized to produce mesoporous material.
[0060] (5) Centrifugal separation is performed on the above product, and water washing is performed three times to obtain mesoporous material containing CTAB.
[0061] (6) The mesoporous material containing the template agent is calcined in a muffle furnace under air atmosphere for 4 hours, with a calcination temperature of 550°C, so that the template agent CTAB is fully decomposed, and the final white product is the mesoporous material.
[0062] Embodiment 2 The present embodiment provides a preparation method of mesoporous material with cement-based material as precursor, comprising the following steps: (1) Deionized water, tricalcium silicate and tricalcium aluminate were mixed according to water-cement ratio 200:1:1, and stirred at 600 rpm for 24 hours to make the total hydration degree reach 80%; then Na2CO3 solution was added into the mixture to make its concentration reach 1 mol / L, and the stirring was continued for 2 hours to decalcify tricalcium silicate, tricalcium aluminate and hydration products, and to dissolve silicate and aluminate into aqueous solution; the above suspension was filtered by filter paper to obtain silicate and aluminate leaching solution.
[0063] (2) Template agent cetyltrimethylammonium bromide (CTAB) was added into the leaching solution with a concentration of 8 g / L, and heated to 60°C to promote the dissolution of CTAB; the heating was stopped after the leaching solution became clear, and the leaching solution was allowed to return to room temperature.
[0064] (3) CO2 gas was introduced into the leaching solution to adjust the pH value, and the flux was 500 mL / min per liter of leaching solution; the introduction of CO2 was stopped when the pH value was adjusted to 10; through self-assembly process, a large amount of white product would appear in the leaching solution, which was mesoporous material containing CTAB.
[0065] (4) The silicate and aluminate were fully polymerized and crystallized through 24 hours of hydrothermal aging treatment at 150°C to produce mesoporous material.
[0066] (5) The above product was centrifuged and washed with water for three times to obtain mesoporous material containing CTAB.
[0067] (6) The mesoporous material containing template agent was calcined in a muffle furnace under air atmosphere for 4 hours, and the calcination temperature was 550°C to fully decompose the template agent CTAB; the final white product was mesoporous material.
[0068] Test Example 1 This test example studies the composition of mesoporous material with cement-based material as precursor, which includes the following steps: the mesoporous material prepared in Example 1 and Example 2 was taken in an appropriate amount to test its X-ray diffraction pattern, and the sample obtained in Example 1 was taken to test Fourier transform infrared absorption spectrum, and the results are shown in Figure 2 、 Figure 3 and Figure 4 .
[0069] According to the results shown, Example 1 is composed of amorphous material, which only contains silicon dioxide; Example 2 is composed of crystalline zeolite, which contains silicon oxide and aluminum oxide.
[0070] Test Example 2 This test example studies the morphology of mesoporous material with cement-based material as precursor, which includes the following steps: the mesoporous material prepared in Example 1 was taken in an appropriate amount to be observed by scanning electron microscope (SEM), and the SEM image is as follows:Figure 5 As shown in the results.
[0071] According to the results, the mesoporous material in Example 1 is composed of only silica, and the electron microscope image shows that the mesoporous material can be nanoparticles.
[0072] Test Example 3 This test example studies the pore characteristics of mesoporous materials with cement-based materials as precursors, and the steps include: taking an appropriate amount of mesoporous material prepared in Example 1 to observe with a transmission electron microscope (TEM), and the TEM image of the pore structure is as shown in Figure 6 ; and the pore distribution is studied by nitrogen adsorption, as shown in Figure 7 .
[0073] According to the results, the mesoporous material in Example 1 is composed of only silica, and the pores of the mesoporous material are arranged in a quasi-hexagonal shape; the pores are distributed in the range of 2-50 nm, and the pore size is uniform, which belongs to mesoporous materials.
[0074] Test Example 4 This test example studies the controllability of the performance of mesoporous materials with cement-based materials as precursors, and the steps include: the remaining steps are the same as in Example 1, only the hydration time (i.e. the hydration degree) of the cement-based material is changed, mesoporous materials with different hydration degree cement-based materials as precursors are prepared, and the relationship between the specific surface area, pore volume, pore wall thickness and hydration degree is studied, and the results are shown in Figure 8 and Figure 9 .
[0075] According to the results, the specific surface area and pore volume of the mesoporous material gradually decrease with the increase of the hydration degree of the cement-based material, and the pore wall thickness gradually increases with the increase of the hydration degree of the cement-based material, and the performance of the mesoporous material can be adjusted by adjusting the hydration degree.
[0076] In summary, the method provided in the present application has simple process flow, low energy consumption and small pollution, and realizes the extraction of different chain length silicon-oxygen tetrahedron and aluminum-oxygen tetrahedron in the cement-based material through carbonization treatment, and realizes the controllable performance of the mesoporous material according to the hydration degree of the cement-based material, the chain length of silicate and aluminate, the type of template agent, etc., including the performance parameters such as specific surface area, pore volume, particle size, silicon-aluminum ratio, crystallinity, etc. The above-mentioned mesoporous material can realize the high-value recycling of cement-based materials and their waste, and has the characteristics of high specific surface area, high porosity, uniform pore size and adjustable performance, and can be widely used in the fields of catalysis, adsorption, drug transportation, sensors, etc.
[0077] The above merely provides the preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the principles and technical scope of the present application shall fall into the scope of the present application.
Claims
1. A method for the preparation of mesoporous materials with a cement-based material as precursor, characterized in that, The method comprises the following steps: Firstly, introducing carbon dioxide or carbonates into the cement-based material to perform decalcification; secondly, using an alkali leaching method to promote the dissolution of silicate and aluminate; then adding a template agent into the leaching solution and adjusting the pH value to promote the self-assembly process of silicate and aluminate and the template agent; finally, obtaining the mesoporous material with the cement-based material as a precursor through extraction or calcination.
2. The production method according to claim 1, characterized by, The carbonates are MCO3, wherein M is at least one of Al, Fe, Ca, Na, K, Mg and Ti; And / or, the flux of CO2 is 0.1-5 L / min per liter of aqueous solution; And / or, the amount of MCO3 is 0.1-2 mol per gram of cement-based material.
3. The preparation method according to claim 1, characterized in that, The alkali leaching method uses an alkali solution which is at least one of MOH and MCO3; wherein M is at least one of Al, Fe, Ca, Na, K, Mg and Ti; And / or, the amount of the alkali solution is 0.5-5 mol / L.
4. The method of claim 1, wherein, The template agent includes at least one of an organic template agent, a nano-carbon template agent, an aerogel template agent and a nano-calcium carbonate template agent; the amount of the template agent is 0.1-4 wt% of the leaching solution; And / or, the organic template agent includes at least one of cetyltrimethylammonium bromide, a multi-block copolymer P123 and a multi-block copolymer F127; And / or, the nano-carbon template agent includes at least one of carbon nanotubes, nano-carbon fibers and nano-carbon black.
5. The preparation method according to claim 1, characterized in that, The adjustment of the pH value is performed by using at least one of CO2 or an acidic reagent; the pH value is 7-12; And / or, the acidic reagent is at least one of hydrochloric acid, sulfuric acid, nitric acid or perchloric acid.
6. The method of claim 1, wherein, The cement-based material is a cement-based material with different hydration degrees and different mineral compositions; The cement-based material includes at least one of dicalcium silicate, tricalcium silicate, tricalcium aluminate, tetracalcium aluminoferrite, hydrated calcium silicate and hydrated calcium alumino-silicate; or the cement-based material contains 50-100 wt% of cement and 0-50 wt% of other pozzolanic materials, the specifications of the cement include 325, 425 or 525, and the other pozzolanic materials include at least one of blast furnace slag powder, fly ash and silica fume.
7. The preparation method according to claim 1, characterized in that, The self-assembly process needs to be followed by aging treatment; the aging treatment is in a room temperature environment or a hydrothermal environment; the aging treatment time is 1-48 hours.
8. The preparation method according to claim 1, characterized in that, The calcination environment is an atmospheric environment, the calcination temperature is 400-700℃, and the calcination time is 2-10 hours; And / or, the extraction temperature is 15-80℃, the extraction time is 0.5-24 hours, and the solid-liquid ratio is 1: (5-20).
9. A mesoporous material with a cement-based material as a precursor, characterized in that, Prepared by the preparation method in any one of claims 1-8; The mesoporous material with the cement-based material as a precursor is a mesoporous material with amorphous pore walls or a mesoporous material with crystalline pore walls.
10. Use of a mesoporous material according to claim 9, wherein the mesoporous material is a mesoporous material according to any one of claims 1 to 8. The mesoporous material with the cement-based material as a precursor is applied in the fields of catalysis, adsorption, drug transportation or sensors.