| 274 | 6 | 6 |
| 下载次数 | 被引频次 | 阅读次数 |
以脱镁海泡石为硅源,在水热条件下合成介孔分子筛MCM–41。考察了晶化时间、晶化温度、pH值等因素对介孔分子筛MCM–41的影响。用X射线衍射分析、Brumauer–Emmett–Teller法和红外分析表征MCM–41。结果表明:在pH值为12,晶化温度为100℃,晶化时间为24h时,所得MCM–41的结晶度最好,比表面积为860m2/g,孔体积为0.77cm3/g,孔径为2.9nm,孔壁厚为1nm。红外分析表明:脱镁海泡石在合成介孔分子筛MCM–41过程中生成了≡≡SiO–—CTA+络合物。
Abstract：Mesoporous molecular sieves MCM–41 were synthesized by the hydrothermal reconstruction method with post-Mg–ex-traction sepiolite as the silica source. The effects of crystallization time, pH value and crystallization temperature on the formation of MCM–41 were investigated. The structure, pore size distribution and specific surface area of MCM–41 were characterized by X-ray diffraction, Brumauer–Emmett–Teller method and infrared analysis. The results show that the hexagonal MCM–41 is formed in alka-line solution of pH=12 when crystallization is carried out at 100 ℃ for 24 h. The specific surface area, pore size and pore volumes of MCM–41 from post-Mg–extraction sepiolite are 860 m2/g, 2.9 nm and 0.77 cm3/g, respectively. The IR results illustrate that the complex of ≡≡SiO–—CTA+ was formed during synthesis of MCM–41 from post-Mg–extraction sepiolite.
[1] KRESGE C T, LEONOWICZ M E, ROTH W J, et al. Orderedmesoporous molecular sieves synthesized by a liquid-crystal template mechanism [J]. Nature, 1992, 359:710–712.
[2] BECK J S, VARTULI J C, ROTH W J, et al. A new family of meso- porous molecular sieves prepared with liquid crystal templates [J]. J Am Chem Soc, 1992, 114:10 834–10 843.
[3] DAVIS M E. Organizing for better synthesis[J]. Nature, 1993, 364: 391–393.
[4] NAOKO I, KEIKO A K, YOSHIYORI T, et al. Investigation of the factors influencing the structural stability of mesoporous silica mo- lecular sieves [J]. Microporous Mesoporous Mater, 2003, 59:43–52.
[5] ZHENG Y, QIU W, ZHANG X, et al. The synthesis and token of mesoporous molecular sieves (Dy, Mn)MCM–41[J]. J Chin Rare Earths(in Chinese), 2002, 20:16–18.
[6] ZHOU C, ZHANG B, LI Q, et al. The affect of reaction medium for the synthesis of MCM–41[J]. J Zhejiang Univ Technol (in Chinese), 2001, 29 (2):110–114.
[7] LINSSEN T, COOL P, BAROUDI M, et al. Leached natural saponite as the silicate source in the synthesis of aluminosilicate hexagonal mesoporous materials [J]. Phys Chem B, 2002, 106:4 470–4 476.
[8] GRISELDA A E, LILIANA B P, GUSTAVO A M, et al. Synthesis and characterization of Al–MCM–41 and Al–MCM–48 mesoporous materials [J]. Catal Lett, 2002, 78:65–75.
[9] CESTEROS Y, HALLER G L. Several factors affecting Al– MCM–41 synthesis [J]. Microporous Mesoporous Mater, 2001, 43: 171–179.
[10] LINDLAR B, KOGELBAUER A, PRINS R. Chemical, structural, and catalytic characteristics of Al–MCM–41 prepared by pH– controlled synthesis [J]. Microporous Mesoporous Mater, 2000, 38: 167–176.
[11] MATSUMOTO A, CHEN H, TSUTSUMI K, et al. Novel route in the synthesis of MCM–41 containing framework aluminum and its characterization [J]. Microporous Mesoporous Mater, 1999, 32:55– 62.
[12] PAULY T R, LIU Y, PINNAVAIA T J, et al. Textural mesoporosity and the catalytic activity of mesoporous molecular sieves with wormhole framework structures[J]. J Am Chem Soc, 1999, 121: 8 835–8 842.
[13] SUN Yu, YUE Y, GAO Z. Synthesis and characterization of AlMCM– 41 molecular sieves [J]. Appl Catal A:General, 1997, 161:121–127.
[14] LIU C, GAO X, MA Y, et al. XRD’s characterization of stabilites about mesoporous molecular sieve MCM–41[J]. Acta Petrolei Sinica (in Chinese), 1997, 13(2):80–86.
基本信息:
DOI：
中图分类号:TB383.4
引用信息:
[1]金胜明,肖飞,杨华明等.用脱镁海泡石制备介孔分子筛MCM-41(英文)[J].硅酸盐学报,2006(04):403-407.
基金信息:
国家自然科学基金(50304014)资助项目。