The nanostrutured mesoporous silica materials MCM-41 with different pore sizes were synthesized by adding 1,3,5-trimethylbenzene (TMB) as assistant agent in the reactant mixture. The obtained samples were investigated by XRD, HRTEM, FTIR and N2 adsorptions. It is shown that the pore sizes, ordered degree and specific surface area increase effectively with the incremental addition of TMB in an appropriate range, but the (100) peak intensity of XRD pattern becomes weakened and the ordered degree decreases when the additive quantity continued to increase. With the addition of TMB in an appropriate range, the effective surfactant ion pair packing parameter, g=V/a0l, is mediated in the range of 1/3-1/2 with the increment of V and l, indicating that mesoporous silica is a well-ordered hexagonal structure. However, when the addition of TMB increases, g value becomes larger, which leads to a less long-range ordered structure for the uneven condissolution of TMB.
参考文献
| [1] | Kresge C T;Leonowicz M E;Roth W J et al.Ordered Mesoporous Molecular Sieves Synthesized by a Liquid-crystal Template Mechanism[J].Nature,1992,359:710-712. |
| [2] | Huo Q;Margolese D I;Ciesla U et al.Organization of Molecules with Inorganic Molecular Species into Nanocomposite Biphase Array[J].Chemistry of Materials,1994,6:1176-1196. |
| [3] | LEI Jia-heng;ZHAO Jun;CHEN Yong-xi .Different Synthesis Methods for Ordered Mesoporous Silicas And Their Characteristics Comparison[J].Journal of Wuhan University of Technology.Materials Science edition,2003(3):1-4. |
| [4] | Barrett E P;Joyner L G;Halenda P P .The Determination of Pore Volume and Distribution in Porous Substance.Ⅰ.Computation from Nitrogen Isltherms[J].Journal of the American Chemical Society,1951,73:373-380. |
| [5] | MARIA D A;Luan Zh;Klinowski J .Titanosilicate Mesoporous Molecular Sieves MCM-41:Sythesis and Characterization[J].Journal of Physical Chemistry,1996,100:2178-2182. |
| [6] | Beck J S;Vartuli J C;Roth W J et al.A New Family of Mesoporous Molecular Sieves Prepared with Liquid Crystal Template[J].Journal of the American Chemical Society,1992,114:10834-10843. |
| [7] | Huo Q S;Margolese D I;Stucky G D .Surfactant Control of Phase in the Synthesis of Mesoporous Silica-based Materials[J].Chemical Master,1996,8:1147-1160. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%