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憬色如初

铜虫 (小有名气)

[求助] 投稿遇到的关于孔径分布的问题 已有2人参与

最近投了一篇文章,我本身是做电化学,关于氮气吸附脱附的相关只是几乎不懂,也只看过几篇文献的这部分,只能照葫芦画瓢。下面是我文章的这部分,以及审稿人意见,求大神指点该如何回复这个问题。谢了!
我文章中的描述部分:
The Nitrogen adsorption–desorption isotherm of the ordered MCNAs exhibits type IV characteristics (Fig. 3), which is indicative of the presence of relatively large pores in the sample. The BET surface area and total pore volume of the ordered MCNAs are 960 m2 g−1 and 1.598 cm3 g−1, respectively. The mesopore size distribution shown in Fig. 3 (inset) indicates that the mesopore sizes of the ordered MCNAs are dominantly distributed between 3.0 nm and 5.0 nm with a peak value at ~ 3.9 nm. The average pore diameter determined by BJH method is 8.8 nm.


审稿人的修改意见:
Nevertheless, the characterization of the mesoporous structure of carbon nanofiber arrays is still not convincing. The author described that the mesopores of ordered MCNAs are mainly centered at ~3.9 nm (page 5, line 56). However, the nitrogen adsorption curve (Figure 3) indicates the presence of mesopores with broad size distribution (a sharp capillary condensation step does not appear). TEM images (Figure 2C) does not give clear evidence for the uniform mesopores, either. In my opinion, sharp pore size distribution presented in inset of Figure 3 might be calculated from a desorption curve. The author should surely confirm whether the pore size distribution was derived by using the adsorption isotherm.

投稿遇到的关于孔径分布的问题
JX]IUB]`M$054989MVUE6MN.png
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yu_xuting

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4楼2015-03-12 12:00:41
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yu_xuting

禁虫 (小有名气)

感谢参与,应助指数 +1
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2楼2015-03-11 23:50:04
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憬色如初

铜虫 (小有名气)

引用回帖:
2楼: Originally posted by yu_xuting at 2015-03-11 23:50:04
审稿专家认为你用的脱附数据得到的孔径分布,我也敢肯定你用的脱附曲线数据计算的,4纳米左右的峰值是个假峰,审稿专家建议你用吸附曲线计算孔分布,要么BJH模型计算,要么DFT模型计算,得到的孔径分布和扫描电镜再 ...

我确实是用脱附算的,然后用吸附做了孔径分布,如下图。这是说明是假孔吗?我又看可了下别的师兄用这台机器做出来的别的样品数据,用脱附可做出和我类似的孔径分布,吸附支同样没有相应的孔。这是仪器有问题吗?
投稿遇到的关于孔径分布的问题-1
GSC537DORR4ANF4Y1QWX~7E.png

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3楼2015-03-12 10:15:38
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憬色如初

铜虫 (小有名气)

引用回帖:
4楼: Originally posted by yu_xuting at 2015-03-12 12:00:41
有的审稿专家不会在乎用吸附或是脱附计算孔分布,因为目前对这存在争论,从你的吸附脱附曲线可以看出你的材料孔分布肯定不均匀,孔分布宽泛,没有明显的峰值,既然你遇到这样的审稿专家了那就用吸附支数据计算的孔 ...

能具体说下怎么从吸附脱附曲线看出材料孔分布不均匀的吗?吸附支做出的图看不出明显的孔径分布(图在上面),该怎么办呢?麻烦你了
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5楼2015-03-12 14:00:20
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