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Smaller Supermicroporous Silica Using Semifluorinated Surfactants as Template. Nature, 1994, 378: 317-321

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第二部分 实验方案设计

实验目的:

1. 用P123合成介孔氧化硅模板SBA-15

2. 用介孔氧化硅为“硬模板”来合成有序介孔炭

所需化学试剂:

P123(聚环氧乙烯醚-聚环氧丙稀醚-聚环氧乙烯醚,摩尔比为20:70:20),正硅酸乙酯(TEOS,Aldrich),蒸馏水,HCL(35 wt%),乙醇,氢氟酸,蔗糖,硫酸

所需实验仪器:

烧杯,夹层烧杯,烘干箱,电磁搅拌器,电子天平,恒温水浴震荡器,比表面积和孔隙度测定仪,扫描电子显微镜,X-射线衍射仪

实验步骤:

2.4.1 氧化硅模板SBA-15的合成

(1)将32g P123(聚环氧乙烯醚-聚环氧丙稀醚-聚环氧乙烯醚,摩尔比为20:70:20)三嵌段聚合物表面活性剂(平均分子量为5800,分子式EO20PO70EO20,Aldrich)溶于1000g蒸馏水和200g HCL(35 wt%)中,在40℃下搅拌4个小时,以确保表面活性剂在水相体系中均匀分散。

(2)往溶液中加入68.8g正硅酸乙酯(TEOS,Aldrich),于40℃下搅拌15分钟,并在

40℃静置24小时。

(3)继续在40℃下陈化24小时。

(4)所得沉淀经过滤、并用乙醇洗涤。洗涤后的样品在550℃下焙烧2小时除去模板剂,所得样品标记为SBA-15-40。

(5)保持其它合成条件不变,仅改变陈化温度,分别在70℃和100℃下陈化24小时,所得到的样品分别标记为SBA-15-70和SBA-15-100。

新产品开发训练报告sample

[9]HuoQS,MargoleseDI.UltraslowTemperatureSynthesisofOrderedHexagonalSmallerSupermicroporousSilicaUsingSemifluorinatedSurfactantsasTemplate.Nature,1994,378:317
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