以氯化十六烷基吡啶(C16PyCl)为模板剂,在不同条件下合成了一系列介孔TiO2(m-TiO2),分别用红外光谱(FT-IR)、X射线粉末衍射(XRD)和BET比表面测定等技术对介孔TiO2的结构、晶相和比表面积进行了表征,探讨了模板剂、溶剂、溶液pH、老化温度和C16PyCl与TTIP摩尔比的影响.结果表明:在本实验条件下,最佳合成条件是C16PyCl为模板剂,溶剂为C2H5OH,pH为7～8,老化温度20℃,C16PyCl与TTIP摩尔比为2.负载活性组分Ru后,Ru颗粒与介孔载体发生相互作用,尽管可能会部分堵塞孔道,但对于甲醇分解为CO和H2的催化活性依然很高,载体的制备条件对甲醇分解活性有一定的影响.
参考文献
| [1] | Kresge C T;Leonowicz M E;Roth W J et al.Ordered mesoporous molecular sieves synthesized by liquid-crystal template mechanism[J].Nature,1992,359(6397):710-712. |
| [2] | Setoguchi Y M;Teraoka Y;Moriguchi I.Rapid room temperature synthesis of hexagonal mesoporous silica using inorganic silicate sources and cationic surfactants under highly acidic conditions[J].Journal of Porous Materials,1997(04):129-134. |
| [3] | Usami Y;Kagawa K;Kawazoe M et al.Catalytic methanol decomposition at low temperatures over palladium supported on metal oxides[J].Applied Catalysis A:General,1998,171:123. |
| [4] | Antonelli D M .Synthesis of phosphorus-free mesoporous titania via templating with amine surfactants[J].Microporous and Mesoporous Materials,1999,30:315. |
| [5] | Wang YQ.;Tang XH.;Palchik O.;Zaban A.;Koltypin Y.;Gedanken A.;Chen SG. .Mesoporous titanium dioxide: sonochemical synthesis and application in dye-sensitized solar cells[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2001(2):521-526. |
| [6] | MERCIER L;Pinnavaia T J .Access in mesoporous materials: advantages of absorbent for environmental remediation[J].Advanced Materials,1997,9(06):500. |
| [7] | 赵修松;王清遐;徐龙伢 等.中孔沸石新材料MCM-41(Ⅰ)合成、酸性及稳定性[J].催化学报,1995,16(05):415-419. |
| [8] | Abe T;Taguchi A;Iwamoto M .Non-silica-based mesostructured materials(1 ): synthesis of vanadium oxide-based materials[J].Chemistry of Materials,1995,7:1429. |
| [9] | Antonelli D M;Ying J Y .Synthesis of hexagonally packed mesoporous TiO2 by a modified sol-gel method[J].Angewandte Chemie International Edition,1995,34:2014. |
| [10] | Dai Q.;Guo Y.;Yuan CW.;He NY. .High photocatalytic activity of pure TiO2 mesoporous molecular sieves for the degradation of 2,4,6-trichlorophenol[J].Chemistry Letters,1998(11):1113-1114. |
| [11] | Zhao DY.;Feng JL.;Chmelka BF.;Stucky GD.;Huo QS. .Nonionic triblock and star diblock copolymer and oligomeric surfactant syntheses of highly ordered, hydrothermally stable, mesoporous silica structures[J].Journal of the American Chemical Society,1998(24):6024-6036. |
| [12] | Xie Youchang;Tang Youqi .Spontaneous monolayer dispersion of oxides and salts onto surface of supports: application to heterogeneous catalysis[J].Advances in Catalysis,1990,37:1-43. |
| [13] | 杨成,任杰,孙予罕.稀土（镧和铈）改性Pd/γ-Al2O3甲醇低温裂解催化剂的制备和性能[J].石油化工,2001(08):605-607. |
| [14] | Kapoor M P;Ichihashi Y;Kuraoka K et al.Catalytic methanol decomposition over palladium deposited on thermally stable mesoporous titanium oxide[J].Journal of Molecular Catalysis A:Chemical,2003,198:303. |
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