以工业级水玻璃为原料在无添加剂条件下,采用动态水热晶化法制备了纳米NaY型分子筛.利用XRD、SEM和TEM分析,研究了晶种胶陈化时间、成胶温度和方式及碱度对NaY分子筛粒径大小及结构组成的影响.结果表明,采用晶种胶陈化时间为4 d,20℃条件下,采用合适的成胶方式可以降低产品的晶粒尺寸;增大反应体系的碱度可降低NaY分子筛的粒径和骨架硅铝比.通过优化合成条件,制备出平均粒径为82～105 nm,且粒度分布较窄的纳米NaY型分子筛.
参考文献
| [1] | Huang LM.;Sun JY.;Miao L.;Li QZ.;Yan YS.;Zhao DY.;Wang ZB. .Fabrication of ordered porous structures by self-assembly of zeolite nanocrystals[J].Journal of the American Chemical Society,2000(14):3530-3531. |
| [2] | Huang L M;Wang Z B;Wang H T et al.Hierarchical porous structures by using zeolite nanocrystals as building blocks[J].Microporous and Mesoporous Materials,2001,48(03):73-78. |
| [3] | Wang HT.;Huang LM.;Mitra A.;Holmberg B.;Yan YS.;Wang ZB. .High-surface-area zeolitic silica with mesoporosity[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2001(9):2307-2310. |
| [4] | 马跃龙 .小颗粒NaY分子筛透明液相导向剂的制备及其性能[J].催化学报,1995,16(05):410-413. |
| [5] | Wang H T;Holmberg B A;Yan Y S .Homogeneous polymer-zeolite nanocomposite membranes by incorporation dispersible template-removed zeolite nanocrystals[J].Journal of Materials Chemistry,2002,12:3640-3643. |
| [6] | 晁自胜,林海强,陈国周,吴廷华,万惠霖,闵恩泽.超微NaY分子筛的合成（Ⅰ）--添加轻稀土离子的影响[J].高等学校化学学报,2000(09):1353-1358. |
| [7] | 晁自胜,林海强,陈国周,吴廷华,万惠霖,闵恩泽.超微NaY分子筛的合成（Ⅱ）--添加铝络合剂的影响[J].高等学校化学学报,2001(01):10-15. |
| [8] | Lindner T;Lechert H .Chelate ligands as mineralizing agents in hydrothermal synthesis of faujasite-type zeolites:a kinetic study[J].ZEOLITES,1996,16:196-206. |
| [9] | Brett A.Holmberg;Huanting Wang;Joseph M.Norbeck;Yushan Yan .Controlling size and yield of zeolite Y nanocrystals using tetramethylammonium bromide[J].Microporous and Mesoporous Materials,2003(1):13-28. |
| [10] | 程志林,晁自胜,万惠霖.微波诱导快速合成纳米NaY分子筛[J].物理化学学报,2003(06):487-491. |
| [11] | 甄铁丽,张树强,王宁.纳米Y型分子筛的制备[J].硅酸盐通报,2007(03):482-485. |
| [12] | 贺鹏,谭涓,刘靖.微细NaY分子筛的合成及粒度分布的控制[J].工业催化,2008(11):21-25. |
| [13] | Sohn J R;DeCanio S J;Luusford J H et al.Determination of framework aluminum content in delaminated Y-type zeolite:a comparison based on unit cell size and wavenumber of i.r.band[J].ZEOLITES,1986,6(03):225-227. |
| [14] | 贺鹏 .微细NaY分子筛的合成及粒度分布控制的研究[D].大连:大连理工大学,2008. |
| [15] | 马跃龙;陈诵英;彭少逸 等.分子筛成核与晶体生长动力学研究.非自成核体系中修正的Lechert模型[J].石油学报,1997,13(02):47-54. |
| [16] | Gonthier S;Thompson R W .Sol-Gel chemistry and molecular sieve synthesis[J].Studies in Surface Science and Catalysis,1994,85:13. |
| [17] | Tosheva, L;Valtchev, VP .Nanozeolites: Synthesis, crystallization mechanism, and applications[J].Chemistry of Materials,2005(10):2494-2513. |
| [18] | Kim Y C;Jeong J Y .Influencing factor on rapid crystallization of high silica hahn-sized zeolite Y without organaic template under atmospheric pressure[J].Journal of Porous Materials,2009,16:299-306. |
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