以正硅酸乙酯(TEOS)为硅源,十六烷基三甲基溴化铵(CTAB)为模板剂,采用溶胶-凝胶法制备了具有双介孔独立分布的SiO2,并用FT-IR、HRTEM、BET等方法对SiO2进行了表征.结果表明,双介孔SiO2中存在大量无序排列的2～3nm的小介孔和18nm左右的大介孔,具有高比表面积(716.4～968.6m2/g)和大孔(1.03～1.63mL/g):通过改变氨水及模板剂的用量可以实现对孔分布的调控.
参考文献
| [1] | Zhang Y;Masahiko K;Noritatsu T .Preparation of aluminasilica bimodal pore catalysts for fischer-tropsch synthesis[J].Catalysis Letters,2005,99(3-4):193. |
| [2] | Sato S;Takahashi R;Sodesawa T;Koubata M .Bimodal porous Pd-silica for liquid-phase hydrogenation[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2005(1/2):247-251. |
| [3] | 黄少云,葛学贵,石磊,苏存宝,马广伟.介微孔复合沸石分子筛对重金属离子吸附性能的实验研究[J].岩石矿物学杂志,2004(01):57-60. |
| [4] | Zhang F Q;Yan Y;Meng Y et al.Ordered bimodal mesoporous silica with tunable pore structure and morphology[J].Microporous and Mesoporous Materials,2007,98(1-3):6. |
| [5] | Coppens M O;Sun J H;Thomas M .Synthesis of hierarchical porous silicas with a controlled pore size distribution at various length scales[J].Catal Todav,2001,69(1-4):331. |
| [6] | 常建华;董绮功.波谱原理及解析[M].北京:科学出版社,2001:76. |
| [7] | Kenichi I;Keisei S;Hiroaki I .Grain stze control of mesoporous silica and formation of bimodal pore structures[J].Langmuir,2004,20(26):11504. |
| [8] | Wang X Z et al.Effects of ammonia/si-lica molar ratio on the synthesis and structure of bimodal mesopore silica xerogel[J].Microporous and Mesoporous Materials,2004,71(1-3):87. |
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