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学科主题: Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
题名: Highly ordered supermicroporous silica
作者: Wang, RL ; Han, SH ; Hou, WG ; Sun, LX ; Zhao, J ; Wang, YS
通讯作者: shuhhan@sdu.edu.cn
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2007
卷: 111, 期:29, 页:10955-10958
收录类别: sci
部门归属: Shandong Univ, Minist Educ, Key Lab Colloid & Interface Chem, Jinan 250100, Peoples R China; Chinese Acad Sci, S China Sea Inst Oceanol, Guangzhou 510301, Peoples R China
项目归属: LMB
摘要: Highly ordered supermicroporous silica (space group 2D-p6mm) was prepared using gemini surfactant [C8H17-N+(CH3)(2)-(CH2)(2)-N+(CH3)(2)-C8H17]center dot 2Br(-) (denoted C8-2-8) with a short spacer group (s = 2) as the structure-directing agent and sodium silicate as the precursor. The samples were characterized by small-angle X-ray diffraction, transmission electron microscopy, and N-2 adsorption-desorption. The results showed that the pore structure of the resulting silica belongs to the two-dimensional hexagonal structure (space group 2D-p6mm) with a pore size of ca. 1.40 nm (in the supermicroporous range). The high-quality supermicroporous silica was formed at a low molar ratio of C8-2-8 to sodium silicate (0.08:1), indicating that the ability of self-assembly of C8-2-8 is stronger than that of corresponding monovalent surfactants (single chain, single head group). For supermicroporous materials, the methods for calculating surface area and pore size are critically compared. The surface area was found to be about 1000 m(2)/g by the alpha(s) plot method. The pore size obtained with the HK model was in the range of 1.36-1.62 nm.
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WOS记录号: WOS:000248121600030
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/4920
Appears in Collections:中科院海洋生物资源可持续利用重点实验室_期刊论文

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Wang, RL; Han, SH; Hou, WG; Sun, LX; Zhao, J; Wang, YS.Highly ordered supermicroporous silica,JOURNAL OF PHYSICAL CHEMISTRY C,2007,111(29):10955-10958
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