Ordered mesoporous carbon has the promising development and potential in catalysis,because of its large amount of uniform pore size and high surface area.In this paper,ordered mesoporous carbon has been successfully synthesized via evaporation-induced self-assembly（EISA） method,using triblock copolymer Pluronic F127 as a soft template,resol as a carbon precursor and diatomaceous earth as the transient scaffolds.Diatomite is a kind of special biomaterial with 3D precision of tens of nanometers and of low price.Diatomite shells not only maintain the intact structure of the ordered mesoporous carbon,but also increase its aperture diameter and surface area to a certain degree,during the carbonization between 600 ℃ to 800 ℃.When the samples were calcined in nitrogen,the features of diatomite could effectively reduce shrinkage ratio of sample structure,keeping the precursor fluid firmly adsorbed on the surface of diatom shells.The resulting materials were characterized by X-ray diffraction,transmission electron microscopy and N2 adsorption-desorption,etc.The results showed all the samples had highly ordered mesoporous structure.Under the support of diatomite,both of the specific surface area（717～773 m2 g-1） and pore sizes（3.9～11.3 nm） of the mesoporous carbon have become much larger,which could be controlled by adjusting the ratio of diatomite to resol.The influence of the diatomite on the structure of the mesoporous carbon was discussed in the paper.Furthermore,we used the as-prepared ordered mesoporous carbon to load Pt nanoparticles.The Pt/carbon catalysts were prepared by microwave-assisted heating process with ethylene glycol as reductant.The electrocatalytic activity of carbon supported Pt nanoparticles was verified by cyclic voltammetry in CH3OH solution.We found the carbon materials with much larger specific surface areas had higher electrocatalytic activity.When the ratio of diatomite to resol was 0.5,the specific surface area of the sample was the largest,and the corresponding Pt/carbon showed the highest peak current of methanol oxidation.%以共聚物F127为软模板,酚醛树脂为碳源,引入硅藻土充当暂态支架,在不同硅藻土与酚醛树脂质量比下,用蒸发自组装法合成有序介孔碳材料.利用XRD,TEM,N2吸附-脱附对其结构进行表征,结果显示,与单一软模板相比,在硅藻土辅助下获得的介孔碳材料不仅具有高度有序的孔道,还具有更大的比表面积（717～773 m2 g-1）和孔径（3.9～11.3 nm）.依据原料比例与介孔碳结构两者间的变化规律,初步探讨了硅藻土在制备中所起的辅助作用.采用微波多元醇还原法制备介孔碳载Pt电催化剂,在甲醇溶液中进行循环伏安测试,发现比表面积的增大有利于碳材料的电催化性能提高,当硅藻土与酚醛树脂的比例为0.5时,制备出的有序介孔碳比表面积最大,载Pt后呈现的正向氧化峰电流也最大.
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机译：用于啤酒的二次过滤的过滤材料及其生产方法技术领域本发明涉及一种用于包含硅藻土的啤酒的二次过滤的过滤材料及其制备方法，其中在与过滤的啤酒的流动相反的方向上，所述过滤材料为由第一层粗过滤硅藻土制成，其厚度大于2毫米，过滤面积的范围为0.66至1.05 kg / me2，第二层由混合物制成，厚度大于2毫米过滤面积为0.55至1.20 kg / me2的细过滤硅藻土和过滤面积为0.10至0.20 kg / me2的吸附材料，第三过滤层具有粗滤硅藻土和细滤硅藻土的重量比为10:90至30:70的混合物产生的厚度大于1.5mm。
