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Highly ordered supermicroporous silica
Wang, RL; Han, SH; Hou, WG; Sun, LX; Zhao, J; Wang, YS;
AbstractHighly 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.
DepartmentShandong 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
Subject AreaChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
Indexed Bysci
Funding ProjectLMB
WOS IDWOS:000248121600030
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Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Recommended Citation
GB/T 7714
Wang, RL,Han, SH,Hou, WG,et al. Highly ordered supermicroporous silica[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2007,111(29):10955-10958.
APA Wang, RL.,Han, SH.,Hou, WG.,Sun, LX.,Zhao, J.,...& ordered supermicroporous silica.JOURNAL OF PHYSICAL CHEMISTRY C,111(29),10955-10958.
MLA Wang, RL,et al."Highly ordered supermicroporous silica".JOURNAL OF PHYSICAL CHEMISTRY C 111.29(2007):10955-10958.
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