Pore size control of wormholelike mesoporous carbons

Pore size control of wormholelike mesoporous carbons
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虫孔状介孔碳的孔径控制

DOI:
10.1016/j.carbon.2008.12.027
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发表时间:
2009-03
期刊:
影响因子:
10.9
通讯作者:
--
中科院分区:
材料科学2区
文献类型:
--
作者:

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通过在正硅酸四乙酯(TEOS)的溶胶-凝胶过程中加入适量的氢氟酸(HF),建立了一种简单有效的调节虫孔类介孔碳(wmc)孔径的方法。当HF/TEOS摩尔比从0增加到1/7时,孔径从3.1增大到8.5nm。布鲁诺尔-埃米特-泰勒表面积相应减小。此外,由于二氧化硅模板量相同,wmc的介孔体积基本保持不变。
A simple and efficient method to tailor the pore size of wormholelike mesoporous carbons (WMCs) has been developed by adding a proper amount of hydrofluoric acid (HF) during the sol-gel process of tetraethyl orthosilicate (TEOS). It was found that the pore size increased obviously from 3.1 to 8.5nm when increasing HF/TEOS molar ratio from 0 to 1/7. Brunauer–Emmett–Teller surface area decreased accordingly. In addition, mesopore volume of WMCs basically kept unvaried due to their identical silica template amount.
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