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MorPHinEXxx

新虫 (初入文坛)

[求助] MCM-41合成介孔碳材料 已有2人参与

最近刚开始接触介孔碳材料。
以蔗糖为碳源,MCM-41为模板。做出来的材料微孔结构较多,TEM有大量气泡。怀疑是碳源未有效填充的原因。
那么该如何有效解决这个问题呢?还有如何判断模板除尽了呢?
求前辈指导啊!万分感谢!
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liudanokokok

木虫 (正式写手)

引用回帖:
11楼: Originally posted by liudanokokok at 2015-01-08 16:24:20
The structure of SBA-15 consists of the
hexagonal arrangement of cylindrical mesoporous tubes 9 nm in
diameter, which is similar to the structure of the honeycomb-like
MCM-41 silica except for ra ...

还有这句话
It is interesting that the hexagonal structural order is retained in CMK-
3, while a featureless XRD pattern is obtained when carbon is
synthesized using MCM-41 silica. This is because the main
mesoporous channels in SBA-15 are interconnected through
micropores inside the walls of the main channels, while the MCM-
41 channels are not interconnected. In the case of MCM-41 silica,
carbon infiltration leads to the formation of carbon rods that are
not bonded to each other.
13楼2015-01-08 17:20:26
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wyq060512

金虫 (著名写手)

好像没人用mcm-41做介孔碳的。41是层状结构,有序性和介孔结构也相对较差。

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2楼2015-01-06 18:46:37
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liudanokokok

木虫 (正式写手)

【答案】应助回帖

感谢参与,应助指数 +1
先看看文献再做。mcm41是不能作为介孔碳的模板的,因为其每个柱状孔相互不连通,做出来顶多是纳米线。而mcm48、sba15都有连续的孔道,是可以的。

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3楼2015-01-06 19:31:35
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tianhao7712

木虫 (正式写手)

【答案】应助回帖

感谢参与,应助指数 +1
楼上正解 没人用mcm-41做介孔炭 最多用sba-15 kit-6  再说现在软模板法这么成熟 除非碳源限制 做硬模板的不多了吧  个人认为
4楼2015-01-06 20:54:44
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