技术领域technical field
本发明涉及材料领域，具体为一种分级孔炭材料及其制备方法。The invention relates to the field of materials, in particular to a hierarchical porous carbon material and a preparation method thereof.
背景技术Background technique
分级孔炭材料具有孔径可调控，且微孔、介孔和大孔合理分布的三元孔结构。在催化应用中，其大孔可提供高效的传质空间，可大大降低扩散阻力；介孔传输通道极大地提高了离子的扩散速率,有利于反应物和产物的传输；而微孔可提高反应物质的分散程度，并提供足够多的活性中心，对催化效果起到了积极的促进作用。因而，分级孔炭材料在催化、吸附、分离、储能等领域均具有广泛的应用。目前，分级孔炭材料的制备方法主要有模板法、模板-活化联用法、免模板法，它们的制备原料和模板多为化工产品。随着能源的短缺与环境的不断恶化，如何直接利用天然生物质作为原料，并通过简单、有效以及低成本的方法来制备具有特定拓扑构造的分级孔材料日益变得至关重要。Hierarchical pore carbon materials have a ternary pore structure with adjustable pore size and reasonable distribution of micropores, mesopores and macropores. In catalytic applications, its macropores can provide efficient mass transfer space, which can greatly reduce diffusion resistance; The degree of dispersion of the substance and the provision of enough active centers play a positive role in promoting the catalytic effect. Therefore, hierarchical porous carbon materials have a wide range of applications in the fields of catalysis, adsorption, separation, and energy storage. At present, the preparation methods of hierarchical porous carbon materials mainly include template method, template-activation method, and template-free method, and their preparation raw materials and templates are mostly chemical products. With the shortage of energy and the continuous deterioration of the environment, how to directly use natural biomass as raw materials and prepare hierarchically porous materials with specific topological structures through simple, effective and low-cost methods has become increasingly important.
木（竹）材具有单向排列的管胞结构（孔结构），其纤维组织从纳米量级的细胞壁膜结构到微米量级的管胞组织，再到毫米量级的年轮，形成了独特的多层次、管胞结构、纤维状和各向异性等生物结构特点。木（竹）材的主成分为木质素、纤维素及半纤维素，主要成分中碳约占44%。因而，木（竹）材不仅可以作生物拟态合成的结构模板，而且可以用作制备碳化物复合材料的碳源和结构模板。此外，与其它源于化工原料的材料相比，木（竹）材的突出优势在于它的“可再生”性和“绿色环保”，符合人类社会可持续发展的战略构想。毋庸置疑，木（竹）材天然的各向异性分级多孔结构在制备具有特殊显微结构分级孔的复合材料方面具有其他结构模板不能比拟的得天独厚的优势。Wood (bamboo) wood has a tracheid structure (pore structure) arranged in one direction, and its fiber organization ranges from nanometer-scale cell wall membrane structure to micron-scale tracheid tissue, and then to millimeter-scale annual rings, forming a unique structure. Biological structural characteristics such as multi-layered, tracheid structure, fibrous and anisotropic. The main components of wood (bamboo) are lignin, cellulose and hemicellulose, and carbon accounts for about 44% of the main components. Therefore, wood (bamboo) materials can not only be used as structural templates for biomimicry synthesis, but also can be used as carbon sources and structural templates for preparing carbide composites. In addition, compared with other materials derived from chemical raw materials, the outstanding advantage of wood (bamboo) lies in its "renewability" and "green environmental protection", which is in line with the strategic concept of sustainable development of human society. Undoubtedly, the natural anisotropic hierarchical porous structure of wood (bamboo) has unique advantages that other structural templates cannot match in the preparation of composite materials with special microstructure hierarchical pores.
相比传统意义上“软模板法”，溶剂挥发诱导自组装法具有：（1）溶剂、前驱物的选择更加多样性；（2）前驱物和模板剂不需要从溶液中分相沉淀出来，降低了对前驱物与模板分子协同组装的控制要求；（3）制备过程操作简单、快速省时。因此，溶剂挥发诱导自组装法可以广泛应用于多种介孔材料的制备过程。显然，合理的利用木（竹）材生物模板结合溶剂挥发诱导自组装过程，将为我们制备具有独特微孔、介孔和大孔的分级孔结构功能材料提供新思路。Compared with the "soft template method" in the traditional sense, the solvent evaporation-induced self-assembly method has: (1) the selection of solvents and precursors is more diverse; (2) the precursors and templates do not need to be phase-separated and precipitated from the solution, The control requirements for the coordinated assembly of precursors and template molecules are reduced; (3) The preparation process is simple, fast and time-saving. Therefore, the solvent evaporation-induced self-assembly method can be widely used in the preparation of various mesoporous materials. Obviously, rational use of wood (bamboo) bio-templates combined with solvent volatilization-induced self-assembly process will provide us with new ideas for preparing functional materials with hierarchical pore structures with unique micropores, mesopores and macropores.
发明内容Contents of the invention
为了克服现有技术中存在的不足，本发明的目的在于提供一种分级孔炭材料的制备方法。本发明以木（竹）材为初级模板，表面活性剂为次级模板，线型酚醛树脂为前驱体，借助于限域自组装和高温炭化过程制备出具有分级孔结构的炭材料。本发明制备过程简单，快速省时、生产成本低、可高效利用木（竹）材等生物质材料并提高其附加值，本发明制备的分级孔炭材料具有高的比表面积和分等级的微孔、介孔和大孔结构。In order to overcome the deficiencies in the prior art, the object of the present invention is to provide a method for preparing a hierarchical porous carbon material. The invention uses wood (bamboo) material as the primary template, surfactant as the secondary template, novolac resin as the precursor, and prepares the carbon material with hierarchical pore structure by means of confined self-assembly and high-temperature carbonization process. The preparation process of the present invention is simple, quick and time-saving, low in production cost, can efficiently utilize biomass materials such as wood (bamboo) and increase their added value, and the graded porous carbon material prepared by the present invention has high specific surface area and graded microstructure Pores, mesoporous and macroporous structures.
本发明所解决的技术问题采用以下技术方案来实现：The technical problem solved by the present invention adopts following technical scheme to realize:
一种分级孔炭材料的制备方法，包括如下步骤：A method for preparing a hierarchical porous carbon material, comprising the steps of:
（1）25~40℃下，将一定量的表面活性剂溶于质量比为1:（20~100）的乙醇中，然后加入低阶酚醛树脂，充分搅拌得到澄清的溶液。(1) Dissolve a certain amount of surfactant in ethanol with a mass ratio of 1: (20-100) at 25-40°C, then add low-order phenolic resin, and stir thoroughly to obtain a clear solution.
（2）将预处理后的木（竹）粉加入到密闭真空加压罐，抽真空，接着注入一定量的步骤（1）溶液，真空负压浸渍30~60分钟。取出，在30～60℃下挥发除去溶剂、干燥，接着在100～150℃下固化6～36小时。(2) Add the pretreated wood (bamboo) powder into a closed vacuum pressurized tank, evacuate, then inject a certain amount of step (1) solution, and vacuum negative pressure impregnation for 30-60 minutes. Take it out, remove the solvent by volatilization at 30-60°C, dry, and then cure at 100-150°C for 6-36 hours.
（3）在保护气氛下，将步骤（2）所得粗产物置于炭化炉中600~1200℃炭化3~6小时，升温速率为3~8℃/min，即可得到一种分级孔炭材料。(3) Under a protective atmosphere, put the crude product obtained in step (2) into a carbonization furnace at 600-1200°C for 3-6 hours, and the heating rate is 3-8°C/min, to obtain a hierarchical porous carbon material .
所述的表面活性剂为聚环氧乙烷-聚环氧丙烷、环氧乙烷-聚环氧丁烷等三嵌段共聚物中的一种，作为优选为非离子表面活剂F127。The surfactant is one of three block copolymers such as polyethylene oxide-polypropylene oxide, ethylene oxide-polybutylene oxide, etc., preferably nonionic surfactant F127.
所述的低阶酚醛树脂（Mw<500）可以通过已知技术：如酚醛和甲醛之间的碱催化反应制备。The low-order phenolic resin (Mw <500) can be prepared by known techniques such as base-catalyzed reaction between phenolic and formaldehyde.
所述的木（竹）粉为大小为30~300目，木粉与前驱液的质量比为1：（1～9）。The wood (bamboo) powder has a size of 30-300 mesh, and the mass ratio of the wood powder to the precursor liquid is 1: (1-9).
所述的还原气氛为氮气、氩气中一种或者两者混合，作为优选为氩气。The reducing atmosphere is one of nitrogen, argon or a mixture of both, preferably argon.
所述的高温炭化为600~1200℃。The high temperature carbonization is 600~1200°C.
有益效果：Beneficial effect :
本发明与现有“模板法”、“模板-活化联用法”、“免模板法”等相比，具有如下优点：（1）以木（竹）材为初次模板，表面活性剂次级模板，线型酚醛树脂为前驱体，利用限域自组装和高温炭化过程制备出具有微孔、介孔和大孔的分级孔结构的炭材料；（2）制备过程简单，快速省时、生产成本低；（3）可有效利用低质木（竹）材、木（竹）材剩余物等生物质创新开发分级孔炭材料，提高其附加值。Compared with the existing "template method", "template-activation combined method" and "template-free method", the present invention has the following advantages: (1) wood (bamboo) is used as the primary template, and the secondary template of the surfactant , novolac resin as the precursor, using confined self-assembly and high-temperature carbonization process to prepare carbon materials with hierarchical pore structure of micropores, mesopores and macropores; (2) The preparation process is simple, fast, time-saving and cost-effective (3) Low-quality wood (bamboo) wood, wood (bamboo) wood residues and other biomass can be effectively used to innovate and develop hierarchical porous carbon materials to increase their added value.
附图说明Description of drawings
图1为实施例5制备的分级孔炭材料的小角X-射线衍射图。Fig. 1 is the small angle X-ray diffraction diagram of the hierarchical pore carbon material prepared in Example 5.
图2为实施例5制备的分级孔炭材料的扫描电镜图。Figure 2 is a scanning electron micrograph of the hierarchically porous carbon material prepared in Example 5.
图3为实施例5制备的分级孔炭材料的透射电镜图（a）。Fig. 3 is a transmission electron microscope image (a) of the hierarchically porous carbon material prepared in Example 5.
图4为实施例5制备的分级孔炭材料的透射电镜图（b）。FIG. 4 is a transmission electron microscope image (b) of the hierarchically porous carbon material prepared in Example 5.
图5为实施例5制备的分级孔炭材料的N2吸附-脱附曲线（a）。Fig. 5 is the N2 adsorption-desorption curve (a) of the hierarchical porous carbon material prepared in Example 5.
图6为实施例5制备的分级孔炭材料的孔径分布曲线（b）。Fig. 6 is the pore size distribution curve (b) of the hierarchically pore carbon material prepared in Example 5.
具体实施方式detailed description
下面举实例对本发明进行详细描述。Examples are given below to describe the present invention in detail.
实施例1：Example 1:
（1）将6.1g苯酚于40~42℃下熔融，加入1.3g质量百分比为20%的NaOH水溶液搅拌10分钟，快速滴入10.5g浓度为37%的甲醛水溶液，升温至70~75℃反应1小时，降温至室温，用0.6M的HCI溶液调节溶液的pH值接近7.0，于50~52℃真空减压脱水1~2小时。将得到的粘稠液体溶于80g乙醇，配成质量百分比为40%均匀溶液待用。(1) Melt 6.1g of phenol at 40~42°C, add 1.3g of 20% NaOH aqueous solution and stir for 10 minutes, quickly drop 10.5g of 37% formaldehyde aqueous solution, and heat up to 70~75°C for reaction After 1 hour, cool down to room temperature, adjust the pH value of the solution to close to 7.0 with 0.6M HCI solution, and dehydrate under vacuum at 50~52°C for 1~2 hours. The resulting viscous liquid was dissolved in 80 g of ethanol to make a 40% homogeneous solution by mass percent for later use.
（2）25℃下，取6.15gF127溶于43.1g乙醇中，搅拌2小时，接着加入30g步骤（1）准备的低阶酚醛树脂溶液，继续搅拌1小时，得到澄清溶液。(2) Dissolve 6.15g of F127 in 43.1g of ethanol at 25°C, stir for 2 hours, then add 30g of the low-order phenolic resin solution prepared in step (1), and continue stirring for 1 hour to obtain a clear solution.
（3）将10g粗化后的木（竹）粉转移到密闭的真空加压罐，抽真空至0.09Mpa，接着注入80g步骤（2）配制的溶液，真空负压浸渍45分钟，缓慢放空。取出浸渍后的木（竹）粉，置于敞开的器皿中35℃下挥发除去溶剂、干燥，接着在105℃下固化8小时。(3) Transfer 10g of roughened wood (bamboo) powder to a closed vacuum pressurized tank, evacuate to 0.09Mpa, then inject 80g of the solution prepared in step (2), impregnate in vacuum negative pressure for 45 minutes, and slowly vent. Take out the impregnated wood (bamboo) powder, place it in an open vessel at 35°C to remove the solvent, dry it, and then cure it at 105°C for 8 hours.
（4）在氩气保护气氛下，将步骤（3）所得粗产物置于炭化炉中700℃炭化4小时，升温速率为3℃/min，即可得到一种分级孔炭材料。(4) Under an argon protective atmosphere, put the crude product obtained in step (3) into a carbonization furnace at 700°C for 4 hours and carbonize at a heating rate of 3°C/min to obtain a hierarchical porous carbon material.
实施例2：Example 2:
（1）将6.1g苯酚于40~42℃下熔融，在该温度下加入1.3g质量百分比为20%的NaOH水溶液搅拌10分钟，加入10.5g浓度为37%的甲醛水溶液，升温至70~75℃反应1小时，降温至室温，用0.6MHCI溶液调节溶液的pH值接近7.0，于50~52℃真空减压脱水1~2小时。将得到的粘稠液体溶于80g乙醇配成质量百分比为40%均匀溶液待用。(1) Melt 6.1g of phenol at 40~42°C, add 1.3g of 20% NaOH aqueous solution at this temperature and stir for 10 minutes, add 10.5g of 37% formaldehyde aqueous solution, and heat up to 70~75 React at ℃ for 1 hour, cool down to room temperature, adjust the pH value of the solution to close to 7.0 with 0.6M HCl solution, and dehydrate under vacuum at 50~52℃ for 1~2 hours. The resulting viscous liquid was dissolved in 80 g of ethanol to make a 40% homogeneous solution by mass percent for later use.
（2）40℃下，取10gF127溶于70g乙醇中，搅拌2小时，接着加入50g步骤（1）准备的低阶酚醛树脂乙醇溶液，继续搅拌1小时，得到澄清溶胶。(2) Dissolve 10g of F127 in 70g of ethanol at 40°C, stir for 2 hours, then add 50g of the low-order phenolic resin ethanol solution prepared in step (1), and continue stirring for 1 hour to obtain a clear sol.
（3）将10g粗化后的木（竹）粉转移到密闭真空加压罐，抽真空至0.09Mpa，接着注入130g步骤（2）配制的溶液，真空负压浸渍60分钟，缓慢放空。取出浸渍后的木（竹）粉，置于敞开的器皿中在40℃下挥发除去溶剂、干燥，接着在150℃下固化6小时。(3) Transfer 10g of roughened wood (bamboo) powder to a closed vacuum pressurized tank, evacuate to 0.09Mpa, then inject 130g of the solution prepared in step (2), impregnate in vacuum negative pressure for 60 minutes, and slowly vent. The impregnated wood (bamboo) powder was taken out, placed in an open vessel, evaporated at 40°C to remove the solvent, dried, and then cured at 150°C for 6 hours.
（4）在氮气保护气氛下，将步骤（3）所得粗产物置于炭化炉中900℃炭化4.5小时，升温速率为4℃/min，即可得到一种分级孔炭材料。(4) Under a nitrogen protective atmosphere, put the crude product obtained in step (3) into a carbonization furnace at 900°C for 4.5 hours and carbonize at a heating rate of 4°C/min to obtain a hierarchical porous carbon material.
实施例3：Example 3:
（1）将6.1g苯酚于40~42℃下熔融，在该温度下加入1.3g质量百分比为20%的NaOH水溶液搅拌10分钟，加入10.5g浓度为37%的甲醛水溶液，升温至70~75℃反应1小时，降温至室温，用0.6MHCI溶液调节溶液的pH值接近7.0，于50~52℃真空减压脱水1~2小时。将得到的粘稠液体溶于80g乙醇配成质量百分比为40%均匀溶液待用。(1) Melt 6.1g of phenol at 40~42°C, add 1.3g of 20% NaOH aqueous solution at this temperature and stir for 10 minutes, add 10.5g of 37% formaldehyde aqueous solution, and heat up to 70~75 React at ℃ for 1 hour, cool down to room temperature, adjust the pH value of the solution to close to 7.0 with 0.6M HCl solution, and dehydrate under vacuum at 50~52℃ for 1~2 hours. The resulting viscous liquid was dissolved in 80 g of ethanol to make a 40% homogeneous solution by mass percent for later use.
（2）30℃下，取4.62gF127溶于32.3g乙醇中，搅拌1.5小时，接着加入23.08g步骤（1）准备的低阶酚醛树脂乙醇溶液，继续搅拌1.5小时，得到澄清溶胶。(2) Dissolve 4.62g of F127 in 32.3g of ethanol at 30°C, stir for 1.5 hours, then add 23.08g of the ethanol solution of low-order phenolic resin prepared in step (1), and continue stirring for 1.5 hours to obtain a clear sol.
（3）将10粗化后的木（竹）粉转移到密闭真空加压罐，抽真空至0.09Mpa，接着注入60g步骤（2）配制的溶液，真空负压浸渍30分钟，缓慢放空。取出浸渍后的木（竹）粉，置于敞开的器皿中45℃下挥发除去溶剂、干燥，接着在100℃下固化10小时。(3) Transfer 10 roughened wood (bamboo) powder to a closed vacuum pressurized tank, evacuate to 0.09Mpa, then inject 60g of the solution prepared in step (2), impregnate in vacuum negative pressure for 30 minutes, and slowly vent. The impregnated wood (bamboo) powder was taken out, placed in an open vessel at 45°C to remove the solvent, dried, and then cured at 100°C for 10 hours.
（4）在氩气保护气氛下，将步骤（3）所得粗产物置于炭化炉中700℃炭化3小时，升温速率为6℃/min，即可得到一种分级孔炭材料。(4) Under an argon protective atmosphere, put the crude product obtained in step (3) into a carbonization furnace at 700°C for 3 hours and carbonize at a heating rate of 6°C/min to obtain a hierarchical porous carbon material.
实施例4：Example 4:
（1）将6.1g苯酚于40~42℃下熔融，在该温度下加入1.3g质量百分比为20%的NaOH水溶液搅拌10分钟，加入10.5g浓度为37%的甲醛水溶液，升温至70~75℃反应1小时，降温至室温，用0.6MHCI溶液调节溶液的pH值接近7.0，于50~52℃真空减压脱水1~2小时。将得到的粘稠液体溶于80g乙醇配成质量百分比为40%均匀溶液待用。(1) Melt 6.1g of phenol at 40~42°C, add 1.3g of 20% NaOH aqueous solution at this temperature and stir for 10 minutes, add 10.5g of 37% formaldehyde aqueous solution, and heat up to 70~75 React at ℃ for 1 hour, cool down to room temperature, adjust the pH value of the solution to close to 7.0 with 0.6M HCl solution, and dehydrate under vacuum at 50~52℃ for 1~2 hours. The resulting viscous liquid was dissolved in 80 g of ethanol to make a 40% homogeneous solution by mass percent for later use.
（2）30℃下，取7.69gF127溶于53.85g乙醇中，搅拌1小时，接着加入38.46g步骤（1）准备的低阶酚醛树脂乙醇溶液，继续搅拌1.5小时，得到澄清溶液。(2) Dissolve 7.69g of F127 in 53.85g of ethanol at 30°C, stir for 1 hour, then add 38.46g of the ethanol solution of low-order phenolic resin prepared in step (1), and continue stirring for 1.5 hours to obtain a clear solution.
（3）将10粗化后的木（竹）粉转移到密闭真空加压罐，抽真空至0.09Mpa，接着注入100g步骤（2）配制的溶液，真空负压浸渍30分钟，缓慢放空。取出浸渍后的木（竹）粉，置于敞开的器皿中在45℃下挥发除去溶剂、干燥，接着在105℃下固化12小时。(3) Transfer 10 roughened wood (bamboo) powder to a closed vacuum pressurized tank, evacuate to 0.09Mpa, then inject 100g of the solution prepared in step (2), impregnate in vacuum negative pressure for 30 minutes, and slowly vent. Take out the impregnated wood (bamboo) powder, place it in an open vessel, volatilize at 45°C to remove the solvent, dry it, and then cure it at 105°C for 12 hours.
（4）在氮气保护气氛下，将步骤（3）所得粗产物置于炭化炉中700℃炭化3小时，升温速率为5℃/min，即可得到一种分级孔炭材料。(4) Under a nitrogen protective atmosphere, put the crude product obtained in step (3) into a carbonization furnace at 700°C for 3 hours and carbonize at a heating rate of 5°C/min to obtain a hierarchical porous carbon material.
实施例5：Example 5:
（1）将6.1g苯酚于40~42℃下熔融，在该温度下加入1.3g质量百分比为20%的NaOH水溶液搅拌10分钟，加入10.5g浓度为37%的甲醛水溶液，升温至70~75℃反应1小时，降温至室温，用0.6MHCI溶液调节溶液的pH值接近7.0，于50~52℃真空减压脱水1~2小时。将得到的粘稠液体溶于80g乙醇配成质量百分比为40%均匀溶液待用。(1) Melt 6.1g of phenol at 40~42°C, add 1.3g of 20% NaOH aqueous solution at this temperature and stir for 10 minutes, add 10.5g of 37% formaldehyde aqueous solution, and heat up to 70~75 React at ℃ for 1 hour, cool down to room temperature, adjust the pH value of the solution to close to 7.0 with 0.6M HCl solution, and dehydrate under vacuum at 50~52℃ for 1~2 hours. The resulting viscous liquid was dissolved in 80 g of ethanol to make a 40% homogeneous solution by mass percent for later use.
（2）40℃下，取12gF127溶于84g乙醇中，搅拌1小时，接着加入60g步骤（1）配制的溶液，继续搅拌1小时，得到澄清溶液。(2) Dissolve 12g of F127 in 84g of ethanol at 40°C, stir for 1 hour, then add 60g of the solution prepared in step (1), and continue stirring for 1 hour to obtain a clear solution.
（3）将10g粗化后的木（竹）粉转移到密闭真空加压罐，抽真空至0.095Mpa，接着注入130g步骤（2）准备的溶液，真空负压浸渍60分钟，缓慢放空。取出浸渍后的木（竹）粉，置于敞开的器皿中40℃下挥发除去溶剂、干燥，接着在120℃下固化24小时。(3) Transfer 10g of roughened wood (bamboo) powder to a closed vacuum pressurized tank, evacuate to 0.095Mpa, then inject 130g of the solution prepared in step (2), impregnate in vacuum negative pressure for 60 minutes, and slowly vent. Take out the impregnated wood (bamboo) powder, place it in an open vessel at 40°C to remove the solvent, dry it, and then cure it at 120°C for 24 hours.
（4）在氩气保护气氛下，将步骤（3）所得粗产物置于炭化炉中900℃炭化4小时，升温速率为3℃/min，即可得到一种分级孔炭材料。(4) Under an argon protective atmosphere, put the crude product obtained in step (3) into a carbonization furnace at 900°C for 4 hours and carbonize at a heating rate of 3°C/min to obtain a hierarchical porous carbon material.
图1为该施例所制备的分级孔炭材料的小角X-射线衍射图，可以看出，该复合材料具有明显的介观结构特征衍射峰。Fig. 1 is the small-angle X-ray diffraction diagram of the hierarchically porous carbon material prepared in this example. It can be seen that the composite material has obvious mesoscopic structural characteristic diffraction peaks.
图2为该实施例所制备的分级孔炭材料的扫描电镜图，可以看出该材料的微观结构，保持了初次模板（木材）的天然微孔结构。Fig. 2 is a scanning electron microscope image of the hierarchical porous carbon material prepared in this example, it can be seen that the microstructure of the material maintains the natural microporous structure of the primary template (wood).
图3、4为该实施例所制备的分级孔炭材料的透射电镜图片，如图（a）和（b）所示，清晰的展示了该复合材料的微孔和介孔结构。Figures 3 and 4 are transmission electron microscope images of the hierarchically porous carbon material prepared in this example, as shown in Figures (a) and (b), which clearly show the micropore and mesopore structure of the composite material.
图5和图6为该实施例所制备的分级孔炭材料的N2吸附-脱附曲线（a）和相应的孔径分布曲线（b）。采用美国Micromeritics公司的ASAP2010氮气吸附仪测试分级孔炭材料的比表面积、孔容和孔径分布。结果表明，该材料的比表面积为568.3m2/g，孔容为0.35cm3/g。从氮气吸附等温曲线，可以看出存在明显的微孔和介孔吸附特征，与TEM测试结果相一致。Figure 5 and Figure 6 are the N2 adsorption-desorption curve (a) and the corresponding pore size distribution curve (b) of the hierarchically porous carbon material prepared in this example. The specific surface area, pore volume and pore size distribution of the hierarchical porous carbon materials were tested by ASAP2010 nitrogen adsorption instrument from Micromeritics, USA. The results show that the material has a specific surface area of 568.3m2 /g and a pore volume of 0.35cm3 /g. From the nitrogen adsorption isotherm curve, it can be seen that there are obvious microporous and mesoporous adsorption characteristics, which is consistent with the TEM test results.
以上显示和描述了本发明的基本原理和主要特征和本发明的优点。本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下，本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements all fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.
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