CMC和CTAB双模板法合成具有稳定结构的MCM-41中孔分子筛(英文)  

Facile Synthesis of Stable Mesoporous Silica MCM-41 Via a Dual Templating of CMC and CTAB

作　　者：张磊[1] 阎子峰[1] 乔世璋[2] 逯高清[2] 

机构地区：[1]中国石油大学(华东)重质油国家重点实验室,山东东营257061 [2]昆士兰大学澳大利亚生物工程和纳米技术研究中心

出　　处：《分子催化》2008年第4期315-319,共5页Journal of Molecular Catalysis(China)

摘　　要：以羧甲基纤维素和十六烷基三甲基溴化铵为双模板,制备出了具有更高稳定性并且具有高度有序二维六方结构的MCM-41介孔分子筛.透射电镜和X射线衍射结果表明,以双模板制备的MCM-41介孔分子筛具有高度有序的二维六方(p6mm)孔道结构.此外,以双模板制备的MCM-41介孔分子筛焙烧前后的X射线衍射结果表明,在焙烧过程中其晶胞收缩比例为3.1%.与以纯表面活性剂为模版制备的MCM-41介孔分子筛(晶胞收缩比例为9.7%)相比,双模板制备的MCM-41介孔分子筛具有更高的稳定性能. MCM-41介孔分子筛稳定性能的提高可能是由于在硅物种、表面活性剂以及羧甲基纤维素在自组装过程中,羧甲基纤维素表面丰富的羟基与硅物种Si-(OH)x的相互作用促进了Si-(OH)x的缩聚.Highly ordered mesoporous molecular sieve MCM-41 with hexagonal structures （p6mm） and enhanced stability has been successfully synthesized via a dual templating of carboxymethyl cellulose （CMC） and cetyhrimethylammonium bromide （CTAB）. The TEM images show the samples were with high order hexagonal mesostructure. Moreover, the lattice distance contraction （Sample synthesized via a dual templating of CMC and CTAB ） of as low as 3.1% is considerably less than the value （about 9.7% ） obtained for MCM-41 materials synthesized by pure CTAB, indicating that mesoporous material synthesized via a dual templating of CMC and CTAB were with higher thermal stability. The interaction between the CMC and the intermediate silicate species Si-（OH） x may increase the concentration of Si-（ OH ）x around the cylindrical surfactant, which make the arrangement of Si-（OH） x is more closely.

关 键 词：中孔 模版法 羧甲基纤维素 MCM-41 

分 类 号：O643.3[理学—物理化学]